1,377 results match your criteria Biodegradation[Journal]


Long-term performance of a UASB reactor treating acid mine drainage: effects of sulfate loading rate, hydraulic retention time, and COD/SO ratio.

Biodegradation 2018 Nov 8. Epub 2018 Nov 8.

Laboratório de Biotecnologia Anaeróbia, Instituto de Ciência e Tecnologia, Universidade Federal de Alfenas (UNIFAL-MG), Rodovia José Aurélio Vilela, 11999 (BR 267, Km 533), 37715-400, Poços de Caldas, MG, Brazil.

Acid mine drainage (AMD) is among the most serious threats to water and the typical alkali-based treatment costs are high. This study's main objective was the establishment of a highly efficient biological process using an upflow anaerobic sludge blanket (UASB) reactor to treat AMD based on a shorter hydraulic retention time (HRT) and lower organic matter input. The process was evaluated for a long-term operation (739 days) in terms of the influence of HRT (14-24 h), metal addition, sulfate loading rate (0. Read More

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November 2018
13 Reads

Bio-emulsifying and biodegradation activities of syringafactin producing Pseudomonas spp. strains isolated from oil contaminated soils.

Biodegradation 2018 Nov 2. Epub 2018 Nov 2.

Unit of Enzyme and Bioconversion, National School of Engineers, Soukraroad, 3038, Sfax, Tunisia.

Pseudomonas strains isolated from oil contaminated soils were screened for biosurfactant production. Three out of eleven Pseudomonas isolates were selected for their high emulsifying activity (E24 value on n-hexadecane ~ 78%). These isolates (E39, E311 and E313) were identified as members of the P. Read More

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November 2018
5 Reads

Rhamnolipid biosurfactants: functional properties and potential contributions for bioremediation.

Biodegradation 2018 Oct 24. Epub 2018 Oct 24.

Shaanxi Provincial Key Laboratory of Biotechnology, Key Laboratory of Resources Biology and Biotechnology in Western China, Ministry of Education, College of Life Science, Northwest University, 229 Taibai North Rd, Xi'an, 710069, Shaanxi, China.

With the increasing public awareness of environmental pollution, surfactant-enhanced bioremediation has been emerged as a very promising strategy to clear up hydrophobic organic compounds (HOCs) contaminated soils. As a class of biosurfactants that has represented a suitable alternative to other chemically synthesized counterparts, rhamnolipids have been intensively applied in biological treatment of HOCs, for being environmentally friendly and having remarkable physicochemical properties associated with the contaminant removal. In this paper, the functional properties of rhamnolipids were summarized, such as surface activity, emulsification/de-emulsification, foaming capacity and phase dispersion. Read More

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October 2018
13 Reads

Degradation of 4-bromophenol by Ochrobactrum sp. HI1 isolated from desert soil: pathway and isotope effects.

Biodegradation 2018 Oct 22. Epub 2018 Oct 22.

Zuckerberg Institute for Water Research, Department of Environmental Hydrology and Microbiology, Ben-Gurion University of the Negev, 84990, Sede Boqer Campus, Israel.

Anthropogenic activities have introduced elevated levels of brominated phenols to the environment. These compounds are associated with toxic and endocrine effects, and their environmental fate is of interest. An aerobic strain Ochrobactrum sp. Read More

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October 2018
4 Reads

Anaerobic Digestion Model No. 1 (ADM1) for mathematical modeling of full-scale sludge digester performance in a municipal wastewater treatment plant.

Authors:
Hale Ozgun

Biodegradation 2018 Oct 17. Epub 2018 Oct 17.

Environmental Engineering Department, Civil Engineering Faculty, Istanbul Technical University, Ayazaga Campus, Maslak, 34469, Istanbul, Turkey.

Anaerobic digestion of sludge is considered to be one of the most appropriate technologies for energy production via conversion of organic matter into methane containing biogas. Biogas produced by anaerobic digestion of municipal wastewater sludge can be utilized as fuel to offset heat and electricity consumption of wastewater treatment facilities. Modeling can be used effectively to evaluate the impact of different process and operation variables on the performance of the treatment processes including complex ones such as anaerobic digestion. Read More

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October 2018
1 Read

An RND transporter in the monoterpene metabolism of Castellaniella defragrans.

Biodegradation 2018 Oct 17. Epub 2018 Oct 17.

Dept. of Microbiology, Max Planck-Institute for Marine Microbiology, Celsiusstr. 1, 28359, Bremen, Germany.

The betaproteobacterium Castellaniella defragrans 65Phen grows on monoterpenes at concentrations toxic to many bacteria. Tolerance mechanisms include modifications of the membrane fatty acid composition and the mineralization of monoterpenes. In this study, we characterized an efflux transporter associated to the monoterpene metabolism. Read More

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October 2018
1 Read

Impact of additives of commercial rubber compounds on the microbial and enzymatic degradation of poly(cis-1,4-isoprene).

Biodegradation 2018 Oct 15. Epub 2018 Oct 15.

Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, Corrensstraße 3, 48149, Münster, Germany.

Much fundamental research has already been performed to understand the mechanism of microbial rubber degradation. Due to the increasing amount of rubber waste, biotechnical methods to degrade that particular waste are strongly needed. The present study evaluates whether a microbial or an enzymatic process is more suitable for efficient biodegradation, due to less sensitivity towards rubber additives. Read More

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October 2018

Simultaneous removal of hexavalent chromium and o-dichlorobenzene by isolated Serratia marcescens ZD-9.

Biodegradation 2018 12 28;29(6):605-616. Epub 2018 Sep 28.

College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.

Heavy metals-organics mixture pollution is increasingly concerned and simultaneous removal of organic pollutants and heavy metals is becoming significant. In this study, a strain was isolated from the sediment of a tannery effluent outfalls, which can remove o-dichlorobenzene (o-DCB) and Cr(VI) simultaneously. The bacterial isolate was identified as Serratia marcescens by the 16S rRNA gene sequences. Read More

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December 2018
3 Reads
2.340 Impact Factor

Characteristics and metabolic pathway of acetamiprid biodegradation by Fusarium sp. strain CS-3 isolated from soil.

Biodegradation 2018 12 26;29(6):593-603. Epub 2018 Sep 26.

State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Puzhu Road No. 30, Nanjing, 211800, People's Republic of China.

An acetamiprid-degrading fungus was isolated from contaminated soil and identified as Fusarium sp. strain CS-3 based on physiological, biochemical, and molecular analyses. Strain CS-3 exploited 50 mg/L as the sole carbon source in liquid culture, removing 98% in 96 h. Read More

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December 2018
8 Reads

Inhibition of benzene, toluene, phenol and benzoate in single and combination on Anammox activity: implication to the denitrification-Anammox synergy.

Biodegradation 2018 12 26;29(6):567-577. Epub 2018 Sep 26.

State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, People's Republic of China.

A previous study demonstrated that denitrification synergized with Anammox could accelerate the anaerobic degradation of benzene. The inhibitory effects of benzene, toluene, phenol and benzoate in single and combination on Anammox activity were investigated by short-term batch tests. The results indicated that the inhibition of single compounds on Anammox could be well fitted with the extended non-competitive and Luong inhibition kinetic models. Read More

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December 2018

Interdependence between the aerobic degradation of BPA and readily biodegradable substrates by activated sludge in semi-continuous reactors.

Biodegradation 2018 12 21;29(6):579-592. Epub 2018 Sep 21.

Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA) CCT La Plata CONICET - Fac. de Cs. Exactas, UNLP, 47 y 116, B1900AJJ, La Plata, Argentina.

The objective of the present work was to analyze the interrelationship between the aerobic degradation of BPA and readily biodegradable substrates by activated sludge (AS) in semi-continuous reactors (SCRs). AS were obtained from three SCRs fed with glucose, acetate or peptone. AS from these reactors were used as inocula for three SCRs that were fed with each biogenic substrate, and for three SCRs that were fed with the biogenic substrate and BPA. Read More

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December 2018

Effects of fungal-assisted algal harvesting through biopellet formation on pesticides in water.

Biodegradation 2018 12 1;29(6):557-565. Epub 2018 Sep 1.

Division of Natural Sciences, Kristianstad University, Kristianstad, Sweden.

Recent research has demonstrated the potential of using filamentous fungi to form pellets with microalgae (biopellets), in order to facilitate harvesting of microalgae from water following algae-based treatment of wastewater. In parallel, there is a need to develop techniques for removing organic pollutants such as pesticides and pharmaceuticals from wastewater. In experiments using the microalga Chlorella vulgaris, the filamentous fungus Aspergillus niger and biopellets composed of these microorganisms, this study investigated whether fungal-assisted algal harvesting can also remove pesticides from contaminated water. Read More

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December 2018

Rapid start-up and performance of denitrifying granular sludge in an upflow sludge blanket (USB) reactor treating high concentration nitrite wastewater.

Biodegradation 2018 12 23;29(6):543-555. Epub 2018 Aug 23.

Hualu Environmental Technology Co., Ltd., Guangzhou, China.

Denitrifying granular sludge reactor holds better nitrogen removal efficiency than other kinds of denitrifying reactors, while this reactor commonly needs seeding anaerobic granular sludge and longer period for start-up in practice, which restricted the application of denitrifying granular sludge reactor. This study presented a rapid and stable start-up method for denitrifying granular sludge. An upflow sludge blanket (USB) reactor with packings was established with flocculent activated sludge for treatment of high concentration nitrite wastewater. Read More

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December 2018
2 Reads

HS biotreatment with sulfide-oxidizing heterotrophic bacteria.

Biodegradation 2018 12 23;29(6):511-524. Epub 2018 Aug 23.

State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, People's Republic of China.

Many industrial activities produce HS, which is toxic at high levels and odorous at even very low levels. Chemolithotrophic sulfur-oxidizing bacteria are often used in its remediation. Recently, we have reported that many heterotrophic bacteria can use sulfide:quinone oxidoreductase and persulfide dioxygenase to oxidize HS to thiosulfate and sulfite. Read More

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December 2018
1 Read
2.340 Impact Factor

Screening of a beta-cypermethrin-degrading bacterial strain Brevibacillus parabrevis BCP-09 and its biochemical degradation pathway.

Biodegradation 2018 12 16;29(6):525-541. Epub 2018 Aug 16.

School of Food and Bioengineering, Xihua University, Chengdu, 610039, Sichuan, People's Republic of China.

A novel beta-cypermethrin (Beta-CP)-degrading strain isolated from activated sludge was identified as Brevibacillus parabrevis BCP-09 based on its morphological and physio-biochemical characteristics, and 16S rRNA gene analysis. Strain BCP-09 could effectively degrade Beta-CP at pH 5.0-9. Read More

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December 2018
2 Reads

Anaerobic degradation of 2,4-dichlorophenoxyacetic acid by Thauera sp. DKT.

Authors:
Duc Danh Ha

Biodegradation 2018 10 13;29(5):499-510. Epub 2018 Aug 13.

Dong Thap University, Cao Lanh City, Dong Thap Province, Vietnam.

Thauera sp. strain DKT isolated from sediment utilized 2,4-dichlorophenoxyacetic acid (2,4D) and its relative compounds as sole carbon and energy sources under anaerobic conditions and used nitrate as an electron acceptor. The determination of 2,4D utilization at different concentrations showed that the utilization curve fitted well with the Edward model with the maximum degradation rate as 0. Read More

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October 2018
9 Reads

Simultaneous production of alkaline amylase and biosurfactant by Bacillus methylotrophicus DCS1: application as detergent additive.

Biodegradation 2018 Aug 10. Epub 2018 Aug 10.

Laboratoire de Génie Enzymatique et de Microbiologie, Ecole Nationale d'Ingénieurs de Sfax, B.P. "1173", 3038, Sfax, Tunisia.

This study investigated the coproduction of alkaline amylase and lipopeptides by Bacillus methylotrophicus DCS1 strain, as well as their biochemical characterisation. The best production of both amylase and biosurfactant was obtained when potato starch (10 g/L) and glutamic acid (5 g/L) were used as carbon and nitrogen sources, respectively. The bacterial strain was incubated for 48 h at 25 °C and 150 rpm. Read More

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August 2018
18 Reads

Growth of Dehalococcoides mccartyi species in an autotrophic consortium producing limited acetate.

Biodegradation 2018 10 10;29(5):487-498. Epub 2018 Aug 10.

Department of Civil and Environmental Engineering, National University of Singapore, Singapore, 117576, Singapore.

The dechlorinating Dehalococcoides mccartyi species requires acetate as carbon source, but little is known on its growth under acetate limiting conditions. In this study, we observed growth and dechlorination of a D. mccartyi-containing mixed consortium in a fixed-carbon-free medium with trichloroethene in the aqueous phase and H/CO in the headspace. Read More

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October 2018
1 Read

Biodegradability of polar compounds formed from weathered diesel.

Biodegradation 2018 10 23;29(5):443-461. Epub 2018 Jul 23.

Centre for Environment and Life Sciences, CSIRO Land and Water, Private Bag No. 5, Wembley, WA, 6913, Australia.

Once released into the environment, petroleum is exposed to biological and physical weathering processes which can lead to the formation and accumulation of highly recalcitrant polar compounds. These polar compounds are often challenging to analyse and can be present as an "unresolved complex mixture" (UCM) in total petroleum hydrocarbon (TPH) analyses and can be mistaken for natural organic matter. Existing research on UCMs comprised of polar compounds is limited, with a majority of the compounds remaining unidentified and their long-term persistence unknown. Read More

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October 2018
9 Reads

Simultaneous nitrification-denitrification and microbial community profile in an oxygen-limiting intermittent aeration SBBR with biodegradable carriers.

Biodegradation 2018 10 23;29(5):473-486. Epub 2018 Jul 23.

Key Laboratory of Water Pollution Control and Environmental Safety of Zhejiang Province, Hangzhou, People's Republic of China.

To enhance the startup and efficient simultaneous nitrification and denitrification for sewage treatment, sequencing batch biofilm reactors (SBBRs) partially coupled with rice husk were established and operated under various intermittent micro-aeration cycles (IMCs) and COD/N ratios under oxygen-limiting intermittent aeration conditions. Experimental results showed that the increase of IMCs with non-aeration/micro-aeration mode of (8 h/4 h) to (2 h/1 h) in a 12 h-cycle accelerated the startup performance and improved NH-N and COD removal. NH-N, TN and COD removal efficiencies were 98. Read More

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October 2018
2 Reads

Characterization and production optimization of biosurfactants by Bacillus mojavensis I4 with biotechnological potential for microbial enhanced oil recovery.

Biodegradation 2018 Jul 20. Epub 2018 Jul 20.

Laboratory of Plant Improvement and Valorization of Agricultural Resources (LR16ES20), National School of Engineering, Sfax University, P.O. Box 1173, 3038, Sfax, Tunisia.

Response surface methodology was applied to optimize the production of biosurfactants from Bacillus mojavensis I4 using Box-Behnken design with four variables. The optimal variable combination was 3% of glucose as carbon source, 0.6% of glutamic acid as nitrogen source, temperature of 35 °C and 10 g/l of NaCl which yielded to an optimal production of 4. Read More

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July 2018
12 Reads

Evaluating the mycostimulation potential of select carbon amendments for the degradation of a model PAH by an ascomycete strain enriched from a superfund site.

Biodegradation 2018 Jul 13. Epub 2018 Jul 13.

Department of Civil & Environmental Engineering, Duke University, Durham, NC, USA.

Although ecological flexibility has been well documented in fungi, it remains unclear how this flexibility can be exploited for pollutant degradation, especially in the Ascomycota phylum. In this work, we assess three mycostimulation amendments for their ability to induce degradation in Trichoderma harzanium, a model fungus previously isolated from a Superfund site contaminated with polycyclic aromatic hydrocarbons. The amendments used in the present study were selected based on the documented ecological roles of ascomycetes. Read More

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July 2018
5 Reads

Special issue: bioremediation of contaminated soil and water: GeoTrop 2017.

Biodegradation 2018 08;29(4):311-312

Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, Hong Kong.

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August 2018
12 Reads

Aerobic bacteria degrading both n-alkanes and aromatic hydrocarbons: an undervalued strategy for metabolic diversity and flexibility.

Biodegradation 2018 08 13;29(4):359-407. Epub 2018 Jun 13.

Unit of Biochemistry, Institute of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Kraków, al. 29 Listopada 54, 31-425, Kraków, Poland.

Environmental pollution with petroleum toxic products has afflicted various ecosystems, causing devastating damage to natural habitats with serious economic implications. Some crude oil components may serve as growth substrates for microorganisms. A number of bacterial strains reveal metabolic capacities to biotransform various organic compounds. Read More

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August 2018
6 Reads

Anaerobic ammonium oxidation linked to sulfate and ferric iron reduction fuels nitrogen loss in marine sediments.

Biodegradation 2018 10 11;29(5):429-442. Epub 2018 Jun 11.

División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), 78216, San Luis Potosí, SLP, Mexico.

Availability of fixed nitrogen is a pivotal driver on primary productivity in the oceans, thus the identification of key processes triggering nitrogen losses from these ecosystems is of major importance as they affect ecosystems function and consequently global biogeochemical cycles. Denitrification and anaerobic ammonium oxidation coupled to nitrite reduction (Anammox) are the only identified marine sinks for fixed nitrogen. The present study provides evidence indicating that anaerobic ammonium oxidation coupled to the reduction of sulfate, the most abundant electron acceptor present in the oceans, prevails in marine sediments. Read More

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October 2018
12 Reads

Adsorptive removal of harmful algal species Microcystis aeruginosa directly from aqueous solution using polyethylenimine coated polysulfone-biomass composite fiber.

Biodegradation 2018 08 25;29(4):349-358. Epub 2018 Jun 25.

Division of Environmental Science and Ecological Engineering, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.

In recent times, the treatment of harmful algal blooms (HABs) became an important environmental issue to preserve and remediate water resources globally. In the present study, the adsorptive removal of harmful algal species Microcystis aeruginosa directly from an aqueous medium was attempted. Waste biomass (Escherichia coli) was immobilized using polysulfone and coated using the cationic polymer polyethylenimine (PEI) to generate PEI-coated polysulfone-biomass composite fiber (PEI-PSBF). Read More

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August 2018
3 Reads

Anaerobic biotransformation of hexachlorocyclohexane isomers by Dehalococcoides species and an enrichment culture.

Biodegradation 2018 Jun 18. Epub 2018 Jun 18.

Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research - UFZ, Permoserstraße 15, 04318, Leipzig, Germany.

The biotransformation of hexachlorocyclohexane isomers (HCH) by two Dehalococcoides mccartyi strains (195 and BTF08) and an enrichment culture was investigated and compared to conversion by the obligate anaerobic strain Clostridium pasteurianum strain DSMZ 525. The D. mccartyi strains preferentially transformed γ-HCH over α-HCH and δ-HCH isomers while β-HCH biotransformation was not significant. Read More

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June 2018
2 Reads

The effect and biological mechanism of granular sludge size on performance of autotrophic nitrogen removal system.

Biodegradation 2018 08 31;29(4):339-347. Epub 2018 May 31.

Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China.

The autotrophic process for nitrogen removal has attracted worldwide attention in the field of wastewater treatment, and the performance of this process is greatly influenced by the size of granular sludge particles present in the system. In this work, the granular sludge was divided into three groups, i.e. Read More

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August 2018
4 Reads

Exploring potential applications of a novel extracellular polymeric substance synthesizing bacterium (Bacillus licheniformis) isolated from gut contents of earthworm (Metaphire posthuma) in environmental remediation.

Biodegradation 2018 08 22;29(4):323-337. Epub 2018 May 22.

Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan.

The aim was to isolate, characterize, and explore potentials of gut bacteria from the earthworm (Metaphire posthuma) and imply these bacteria for remediation of Cu(II) and Zn(II). An extracellular polymeric substance (EPS) producing gut bacteria (Bacillus licheniformis strain KX657843) was isolated and identified based on 16S rRNA sequencing and phylogenetic analysis. The strain showed maximum tolerance of 8 and 6 mM for Cu(II) and Zn(II) respectively. Read More

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August 2018
6 Reads
2.340 Impact Factor

Competition for electrons between mono-oxygenations of pyridine and 2-hydroxypyridine.

Biodegradation 2018 10 21;29(5):419-427. Epub 2018 May 21.

Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, 85287-5701, USA.

Pyridine and its heterocyclic derivatives are widely encountered in industrial wastewaters, and they are relatively recalcitrant to biodegradation. Pyridine biodegradation is initiated by two mono-oxygenation reactions that compete for intracellular electron donor (2H). In our experiments, UV photolysis of pyridine generated succinate, whose oxidation augmented the intracellular electron donor and accelerated pyridine biodegradation and mineralization. Read More

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October 2018
4 Reads

Application of a low-cost biosurfactant in heavy metal remediation processes.

Biodegradation 2018 May 4. Epub 2018 May 4.

Universidade Católica de Pernambuco, Rua do Príncipe, n. 526, Boa Vista, Recife, Pernambuco, CEP 50050-900, Brazil.

The industrial interest in microbial surfactants has intensified in recent years due to the characteristics of these compounds, such as biodegradability, low toxicity, and effectiveness in removing heavy metals and hydrophobic organic compounds from soil and water. This paper describes the production of a biosurfactant by the yeast Candida tropicalis grown in distilled water with 2.5% molasses, 2. Read More

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May 2018
3 Reads

Production, formulation and cost estimation of a commercial biosurfactant.

Biodegradation 2018 May 3. Epub 2018 May 3.

Northeast Biotechnology Network, Federal Rural University of Pernambuco, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, Recife, Pernambuco, CEP: 52171-900, Brazil.

Due to their amphipathic nature, biosurfactants are multifunctional molecules that have considerable potential in several industries, especially the petroleum industry. In this study, the commercial production of a biosurfactant from Pseudomonas cepacia CCT6659 grown on industrial waste was investigated in a semi-industrial 50-L bioreactor for use in the removal of hydrocarbons from oily effluents. A concentration of 40. Read More

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May 2018
3 Reads

1,4-Dioxane degradation characteristics of Rhodococcus aetherivorans JCM 14343.

Biodegradation 2018 06 25;29(3):301-310. Epub 2018 Apr 25.

Environment and Medical Sciences Course, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Sagamihara-Minami, Kanagawa, 252-0373, Japan.

Rhodococcus aetherivorans JCM 14343 can degrade 1,4-dioxane as a sole carbon and energy source. This study aimed to characterize this 1,4-dioxane degradation ability further, and assess the potential use of the strain for 1,4-dioxane removal in industrial wastewater. Strain JCM 14343 was able to degrade 1,4-dioxane inducibly, and its 1,4-dioxane degradation was also induced by tetrahydrofuran and 1,4-butanediol. Read More

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June 2018
2 Reads

Anthelmintic efficacy of glycolipid biosurfactant produced by Pseudomonas plecoglossicida: an insight from mutant and transgenic forms of Caenorhabditis elegans.

Biodegradation 2018 Apr 16. Epub 2018 Apr 16.

Department of Microbial Biotechnology, Bharathiar University, Coimbatore, TN, India.

The current research focuses on the production and characterization of glycolipid biosurfactant (GB) from Pseudomonas plecoglossicida and its anthelmintic activity against Caenorhabditis elegans. The GB was purified and characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Gas Chromatography and Mass Spectrometry (GC-MS) analysis. Anthelmintic activity of GB was studied at six different pharmacological doses from 10 to 320 µg/mL on C. Read More

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April 2018
4 Reads
2.340 Impact Factor

Kinetics study of nicosulfuron degradation by a Pseudomonas nitroreducens strain NSA02.

Biodegradation 2018 06 10;29(3):271-283. Epub 2018 Apr 10.

Key Laboratory of Integrated Pest Management on Crops in Southwest, Ministry of Agriculture, Institute of Plant Protection, Sichuan Academy of Agricultural Science, Chengdu, 610066, People's Republic of China.

A bacterial strain NSA02, isolated from contaminated soil and identified as Pseudomonas nitroreducens based on partial 16S rDNA gene sequence analysis and BIOLOG microbiology analysis, was used to study biodegradation of nicosulfuron in the culture medium. The optimal degradation conditions were determined to be 30 °C and pH 7.0. Read More

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June 2018
7 Reads

Nitrogen removal performance and microbial community of an enhanced multistage A/O biofilm reactor treating low-strength domestic wastewater.

Biodegradation 2018 06 7;29(3):285-299. Epub 2018 Apr 7.

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, People's Republic of China.

The low-strength domestic wastewater (LSDW) treatment with low chemical oxygen demand (COD) has drawn extensive attention for the poor total nitrogen (TN) removal performance. In the present study, an enhanced multistage anoxic/oxic (A/O) biofilm reactor was designed to improve the TN removal performance of the LSDW treatment. Efficient nitrifying and denitrifying biofilm carriers were cultivated and then filled into the enhanced biofilm reactor as the sole microbial source. Read More

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June 2018
24 Reads
2.340 Impact Factor

Biodegradation of pentafluorosulfanyl-substituted aminophenol in Pseudomonas spp.

Biodegradation 2018 06 30;29(3):259-270. Epub 2018 Mar 30.

School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland.

The pentafluorosulfanyl (SF-) substituent conveys properties that are beneficial to drugs and agrochemicals. As synthetic methodologies improve the number of compounds containing this group will expand and these chemicals may be viewed as emerging pollutants. As many microorganisms can degrade aromatic xenobiotics, we investigated the catabolism of SF-substituted aminophenols by bacteria and found that some Pseudomonas spp. Read More

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June 2018
11 Reads

Improvement of sulfamethoxazole (SMX) elimination and inhibition of formations of hydroxylamine-SMX and N4-acetyl-SMX by membrane bioreactor systems.

Biodegradation 2018 06 15;29(3):245-258. Epub 2018 Mar 15.

Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, No. 135 Yaguan Road, Haihe Education Park, Tianjin, 300350, People's Republic of China.

Sulfamethoxazole (SMX) has frequently been detected in aquatic environments. In natural environment, not only individual microorganism but also microbial consortia are involved in some biotransformation of pollutants. The competition for space under consortia causing cell-cell contact inhibition changes the cellular behaviors. Read More

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June 2018
3 Reads

Anaerobic biodegradation of partially hydrolyzed polyacrylamide in long-term methanogenic enrichment cultures from production water of oil reservoirs.

Biodegradation 2018 06 3;29(3):233-243. Epub 2018 Mar 3.

State Key Laboratory of Bioreactor Engineering and Institute of Applied Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China.

The increasing usage of partially hydrolyzed polyacrylamide (HPAM) in oilfields as a flooding agent to enhance oil recovery at so large quantities is an ecological hazard to the subsurface ecosystem due to persistence and inertness. Biodegradation of HPAM is a potentially promising strategy for dealing with this problem among many other methods available. To understand the responsible microorganisms and mechanism of HPAM biodegradation under anaerobic conditions, an enrichment culture from production waters of oil reservoirs were established with HPAM as the sole source of carbon and nitrogen incubated for over 328 days, and analyzed using both molecular microbiology and chemical characterization methods. Read More

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June 2018
8 Reads

Contaminant concentration versus flow velocity: drivers of biodegradation and microbial growth in groundwater model systems.

Biodegradation 2018 06 28;29(3):211-232. Epub 2018 Feb 28.

Helmholtz Zentrum München - German Research Center for Environmental Health, Institute of Groundwater Ecology, Ingolstädter Landstrasse 1, 85764, Neuherberg, Germany.

Aromatic hydrocarbons belong to the most abundant contaminants in groundwater systems. They can serve as carbon and energy source for a multitude of indigenous microorganisms. Predictions of contaminant biodegradation and microbial growth in contaminated aquifers are often vague because the parameters of microbial activity in the mathematical models used for predictions are typically derived from batch experiments, which don't represent conditions in the field. Read More

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June 2018
3 Reads

Modulation of microbial consortia enriched from different polluted environments during petroleum biodegradation.

Biodegradation 2018 04 28;29(2):187-209. Epub 2018 Feb 28.

Laboratory of Analysis, Treatment and Valorization of Environmental Pollutants and Products, Faculty of Pharmacy, Monastir University, Monastir, Tunisia.

Environmental microbial communities are key players in the bioremediation of hydrocarbon pollutants. Here we assessed changes in bacterial abundance and diversity during the degradation of Tunisian Zarzatine oil by four indigenous bacterial consortia enriched from a petroleum station soil, a refinery reservoir soil, a harbor sediment and seawater. The four consortia were found to efficiently degrade up to 92. Read More

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April 2018
23 Reads

Biochemical pathways and enhanced degradation of di-n-octyl phthalate (DOP) in sequencing batch reactor (SBR) by Arthrobacter sp. SLG-4 and Rhodococcus sp. SLG-6 isolated from activated sludge.

Biodegradation 2018 04 15;29(2):171-185. Epub 2018 Feb 15.

College of Civil Engineering, Sichuan Agricultural University, Dujiangyan, 611830, China.

Two bacterial strains designated as Arthrobacter sp. SLG-4 and Rhodococcus sp. SLG-6, capable of utilizing di-n-octyl phthalate (DOP) as sole source of carbon and energy, were isolated from activated sludge. Read More

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April 2018
16 Reads
2.340 Impact Factor

Biodegradation of n-alkanes on oil-seawater interfaces at different temperatures and microbial communities associated with the degradation.

Biodegradation 2018 04 3;29(2):141-157. Epub 2018 Feb 3.

Department Environment and New Reseources, SINTEF Ocean, 7465, Trondheim, Norway.

Oil biodegradation studies have mainly focused on microbial processes in dispersions, not specifically on the interfaces between the oil and the seawater in the dispersions. In this study, a hydrophobic adsorbent system, consisting of Fluortex fabrics, was used to investigate biodegradation of n-alkanes and microbial communities on oil-seawater interfaces in natural non-amended seawater. The study was performed over a temperature range from 0 to 20 °C, to determine how temperature affected biodegradation at the oil-seawater interfaces. Read More

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April 2018
9 Reads

Simultaneous nitrification and denitrification with different mixed nitrogen loads by a hypothermia aerobic bacterium.

Biodegradation 2018 04 30;29(2):159-170. Epub 2018 Jan 30.

Chongqing Key Laboratory of Soil Multiscale Interfacial Process, College of Resources and Environment, Southwest University, NO 2 Tiansheng Road, Beibei District, Chongqing, 400716, China.

Microorganism with simultaneous nitrification and denitrification ability plays a significant role in nitrogen removal process, especially in the eutrophic waters with excessive nitrogen loads. The nitrogen removal capacity of microorganism may suffer from low temperature or nitrite nitrogen source. In this study, a hypothermia aerobic nitrite-denitrifying bacterium, Pseudomonas tolaasii strain Y-11, was selected to determine the simultaneous nitrification and denitrification ability with mixed nitrogen source at 15 °C. Read More

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April 2018
6 Reads
2.340 Impact Factor

Biodegradation of sulfonamides by Shewanella oneidensis MR-1 and Shewanella sp. strain MR-4.

Biodegradation 2018 04 4;29(2):129-140. Epub 2018 Jan 4.

School of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China.

Because of extensive sulfonamides application in aquaculture and animal husbandry and the consequent increase in sulfonamides discharged into the environment, strategies to remediate sulfonamide-contaminated environments are essential. In this study, the resistance of Shewanella oneidensis MR-1 and Shewanella sp. strain MR-4 to the sulfonamides sulfapyridine (SPY) and sulfamethoxazole (SMX) were determined, and sulfonamides degradation by these strains was assessed. Read More

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April 2018
9 Reads

Identification of metolachlor mineralizing bacteria in aerobic and anaerobic soils using DNA-stable isotope probing.

Biodegradation 2018 04 28;29(2):117-128. Epub 2017 Dec 28.

Department of Entomology, Plant Pathology and Weed Sciences, New Mexico State University, Skeen Hall, Room N141, 945 College Avenue, Las Cruces, NM, 88003, USA.

The influence of soil environmental factors such as aeration on the ecology of microorganisms involved in the mineralization and degradation of the popular soil-applied pre-emergent herbicide, metolachlor is unknown. To address this knowledge gap, we utilized DNA-based stable isotope probing (SIP) where soil microcosms were incubated aerobically or anaerobically and received herbicide treatments with unlabeled metolachlor or C-metolachlor. Mineralization of metolachlor was confirmed as noted from the evolution of CO from C-metolachlor-treated microcosms and clearly demonstrated the efficient utilization of the herbicide as a carbon source. Read More

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April 2018
12 Reads

Ammonium removal using algae-bacteria consortia: the effect of ammonium concentration, algae biomass, and light.

Biodegradation 2018 04 13;29(2):105-115. Epub 2017 Dec 13.

Department of Civil Engineering, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada.

In this study, the effects of ammonium nitrogen concentration, algae biomass concentration, and light conditions (wavelength and intensity) on the ammonium removal efficiency of algae-bacteria consortia from wastewater were investigated. The results indicated that ammonium concentration and light intensity had a significant impact on nitrification. It was found that the highest ammonia concentration (430 mg N/L) in the influent resulted in the highest ammonia removal rate of 108 ± 3. Read More

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April 2018
4 Reads

Underestimated effects of sediments on enhanced startup performance of biofilm systems for polluted source water pretreatment.

Biodegradation 2018 02 9;29(1):89-103. Epub 2017 Dec 9.

Department of Environmental Engineering, Zhejiang University, Hangzhou, 310058, China.

In order to evaluate the enhancement mechanisms of enhanced startup performance in biofilm systems for polluted source water pretreatment, three lab-scale reactors with elastic stereo media (ESM) were operated under different enhanced sediment and hydraulic agitation conditions. It is interesting to found the previously underestimated or overlooked effects of sediment on the enhancement of pollutants removal performance and enrichment of functional bacteria in biofilm systems. The maximum NH-N removal rate of 0. Read More

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February 2018
15 Reads

Anaerobic degradation of 1-methylnaphthalene by a member of the Thermoanaerobacteraceae contained in an iron-reducing enrichment culture.

Biodegradation 2018 02 24;29(1):23-39. Epub 2017 Nov 24.

Biofilm Center, University of Duisburg-Essen, Universitätsstr. 5, 41451, Essen, Germany.

An anaerobic culture (1MN) was enriched with 1-methylnaphthalene as sole source of carbon and electrons and Fe(OH) as electron acceptor. 1-Naphthoic acid was produced as a metabolite during growth with 1-methylnaphthalene while 2-naphthoic acid was detected with naphthalene and 2-methylnaphthalene. This indicates that the degradation pathway of 1-methylnaphthalene might differ from naphthalene and 2-methylnaphthalene degradation in sulfate reducers. Read More

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February 2018
16 Reads

Whole community transcriptome of a sequencing batch reactor transforming 2,4-dinitroanisole (DNAN) and 3-nitro-1,2,4-triazol-5-one (NTO).

Biodegradation 2018 02 16;29(1):71-88. Epub 2017 Nov 16.

University of Utah, Civil and Environmental Engineering, 110 Central Campus Drive, Salt Lake City, UT, 84108, USA.

Two sequencing batch reactors (SBRs) were run to bio-mineralize 2,4-dinitroanisole (DNAN) and 3-nitro-1,2,4-triazol-5-one (NTO) in lab scale settings. The reactors were shown to reproducibly biotransform these munitions under aerobic and anaerobic conditions during the operations of these SBRs. Complete removal (100% biotransformation) of DNAN (initially 17. Read More

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February 2018
8 Reads