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    1349 results match your criteria Biodegradation[Journal]

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    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 May 22. 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

    Competition for electrons between mono-oxygenations of pyridine and 2-hydroxypyridine.
    Biodegradation 2018 May 21. 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

    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

    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

    1,4-Dioxane degradation characteristics of Rhodococcus aetherivorans JCM 14343.
    Biodegradation 2018 Jun 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

    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

    Kinetics study of nicosulfuron degradation by a Pseudomonas nitroreducens strain NSA02.
    Biodegradation 2018 Jun 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

    Nitrogen removal performance and microbial community of an enhanced multistage A/O biofilm reactor treating low-strength domestic wastewater.
    Biodegradation 2018 Jun 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

    Biodegradation of pentafluorosulfanyl-substituted aminophenol in Pseudomonas spp.
    Biodegradation 2018 Jun 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

    Improvement of sulfamethoxazole (SMX) elimination and inhibition of formations of hydroxylamine-SMX and N4-acetyl-SMX by membrane bioreactor systems.
    Biodegradation 2018 Jun 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

    Anaerobic biodegradation of partially hydrolyzed polyacrylamide in long-term methanogenic enrichment cultures from production water of oil reservoirs.
    Biodegradation 2018 Jun 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

    Contaminant concentration versus flow velocity: drivers of biodegradation and microbial growth in groundwater model systems.
    Biodegradation 2018 Jun 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

    Modulation of microbial consortia enriched from different polluted environments during petroleum biodegradation.
    Biodegradation 2018 Apr 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

    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 Apr 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

    Biodegradation of n-alkanes on oil-seawater interfaces at different temperatures and microbial communities associated with the degradation.
    Biodegradation 2018 Apr 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

    Simultaneous nitrification and denitrification with different mixed nitrogen loads by a hypothermia aerobic bacterium.
    Biodegradation 2018 Apr 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

    Biodegradation of sulfonamides by Shewanella oneidensis MR-1 and Shewanella sp. strain MR-4.
    Biodegradation 2018 Apr 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

    Identification of metolachlor mineralizing bacteria in aerobic and anaerobic soils using DNA-stable isotope probing.
    Biodegradation 2018 Apr 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

    Ammonium removal using algae-bacteria consortia: the effect of ammonium concentration, algae biomass, and light.
    Biodegradation 2018 Apr 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

    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

    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

    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

    A new aerobic chemolithoautotrophic arsenic oxidizing microorganism isolated from a high Andean watershed.
    Biodegradation 2018 02 16;29(1):59-69. Epub 2017 Nov 16.
    Department of Hydraulic and Environmental Engineering, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, 7820436, Santiago, Chile.
    Biological arsenic oxidation has been suggested as a key biogeochemical process that controls the mobilization and fate of this metalloid in aqueous environments. To the best of our knowledge, only four aerobic chemolithoautotrophic arsenite-oxidizing (CAO) bacteria have been shown to grow via direct arsenic oxidation and to have the essential genes for chemolithoautotrophic arsenite oxidation. In this study, a new CAO bacterium was isolated from a high Andean watershed evidencing natural dissolved arsenic attenuation. Read More

    The effect of methanogenesis inhibition, inoculum and substrate concentration on hydrogen and carboxylic acids production from cassava wastewater.
    Biodegradation 2018 02 11;29(1):41-58. Epub 2017 Nov 11.
    Laboratório de Saneamento Ambiental, Departamento de Engenharia Civil e Ambiental, Universidade Federal de Pernambuco, Av. Acadêmico Hélio Ramos, s/n. Cidade Universitária, Recife, PE, CEP: 50740-530, Brazil.
    Manipueira is a carbohydrate-rich agro-industrial waste from cassava processing. It is considered well suitable for biotechnological processes, such as hydrogen and carboxylic acids production, due to the high content of easily degradable organic matter. However, the proper methanogenesis inhibition method, inoculum type, and organic loads are factors still limiting the processes. Read More

    Novel MBR_based main stream biological nutrient removal process: high performance and microbial community.
    Biodegradation 2018 02 28;29(1):11-22. Epub 2017 Oct 28.
    School of Environment and Spatial Informatics, China University of Mining & Technology, Xuzhou, 221116, China.
    For municipal wastewater treatment, main stream biological nutrient removal (BNR) process is becoming more and more important. This lab-scale study, novel MBR_based BNR processes (named AN-MBR and ANO-MBR) were built. Comparison of the COD removal, results obtained demonstrated that COD removal efficiencies were almost the same in three processes, with effluent concentration all bellowed 30 mg L. Read More

    Biodegradation and chemotaxis of polychlorinated biphenyls, biphenyls, and their metabolites by Rhodococcus spp.
    Biodegradation 2018 02 19;29(1):1-10. Epub 2017 Oct 19.
    Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
    Two biphenyl-degrading bacterial strains, SS1 and SS2, were isolated from polychlorinated biphenyl (PCB)-contaminated soil. They were identified as Rhodococcus ruber and Rhodococcus pyridinivorans based on the 16S rRNA gene sequence, as well as morphological, physiological and biochemical characteristics. SS1 and SS2 exhibited tolerance to 2000 and 3000 mg/L of biphenyl. Read More

    Potential for cometabolic biodegradation of 1,4-dioxane in aquifers with methane or ethane as primary substrates.
    Biodegradation 2017 12 11;28(5-6):453-468. Epub 2017 Oct 11.
    CDM Smith, Edison, NJ, USA.
    The objective of this research was to evaluate the potential for two gases, methane and ethane, to stimulate the biological degradation of 1,4-dioxane (1,4-D) in groundwater aquifers via aerobic cometabolism. Experiments with aquifer microcosms, enrichment cultures from aquifers, mesophilic pure cultures, and purified enzyme (soluble methane monooxygenase; sMMO) were conducted. During an aquifer microcosm study, ethane was observed to stimulate the aerobic biodegradation of 1,4-D. Read More

    Novel bacteria capable of degrading phenanthrene in activated sludge revealed by stable-isotope probing coupled with high-throughput sequencing.
    Biodegradation 2017 12 27;28(5-6):423-436. Epub 2017 Sep 27.
    Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
    The indigenous microorganisms responsible for degrading phenanthrene (PHE) in activated biosludge were identified using DNA-based stable isotope probing. Besides the well-known PHE degraders Burkholderia, Ralstonia, Sinobacteraceae and Arthrobacter, we for the first time linked the taxa Paraburkholderia and Kaistobacter with in situ PHE biodegradation. Analysis of PAH-RHD gene detected in the heavy DNA fraction of C-PHE treatment suggested the mechanisms of horizontal gene transfer or inter-species hybridisation in PAH-RHD gene spread within the microbial community. Read More

    Effect of influent substrate ratio on anammox granular sludge: performance and kinetics.
    Biodegradation 2017 12 27;28(5-6):437-452. Epub 2017 Sep 27.
    School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, China.
    Effect of influent substrate ratio on anammox process was studied in sequencing batch reactor. Operating temperature was fixed at 35 ± 1 °C. Influent pH and hydraulic retention time were 7. Read More

    Enhanced dimethyl phthalate biodegradation by accelerating phthalic acid di-oxygenation.
    Biodegradation 2017 12 23;28(5-6):413-421. Epub 2017 Aug 23.
    Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, 85287-5701, USA.
    The aerobic biodegradation of dimethyl phthalate (DMP) is initiated with two hydrolysis reactions that generate an intermediate, phthalic acid (PA), that is further biodegraded through a two-step di-oxygenation reaction. DMP biodegradation is inhibited when PA accumulates, but DMP's biodegradation can be enhanced by adding an exogenous electron donor. We evaluated the effect of adding succinate, acetate, or formate as an exogenous electron donor. Read More

    Pesticide dissipation and microbial community changes in a biopurification system: influence of the rhizosphere.
    Biodegradation 2017 12 5;28(5-6):395-412. Epub 2017 Aug 5.
    Chemical Science and Natural Resource Department, Universidad de La Frontera, Temuco, Chile.
    The dissipation of atrazine, chlorpyrifos and iprodione in a biopurification system and changes in the microbial and some biological parameters influenced by the rhizosphere of Lolium perenne were studied in a column system packed with an organic biomixture. Three column depths were analyzed for residual pesticides, peroxidase, fluorescein diacetate activity and microbial communities. Fungal colonization was analyzed by confocal laser scanning microscopy to assess the extent of its proliferation in wheat straw. Read More

    Characterization of the biodegradation, bioremediation and detoxification capacity of a bacterial consortium able to degrade the fungicide thiabendazole.
    Biodegradation 2017 12 28;28(5-6):383-394. Epub 2017 Jul 28.
    Laboratory of Plant and Environmental Biotechnology, Department of Biochemistry and Biotechnology, University of Thessaly, Viopolis, 41500, Larissa, Greece.
    Thiabendazole (TBZ) is a persistent fungicide used in the post-harvest treatment of fruits. Its application results in the production of contaminated effluents which should be treated before their environmental discharge. In the absence of efficient treatment methods in place, biological systems based on microbial inocula with specialized degrading capacities against TBZ could be a feasible treatment approach. Read More

    Copper stressed anaerobic fermentation: biogas properties, process stability, biodegradation and enzyme responses.
    Biodegradation 2017 12 15;28(5-6):369-381. Epub 2017 Jul 15.
    Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing, 102206, China.
    The effect of copper (added as CuCl) on the anaerobic co-digestion of Phragmites straw and cow dung was studied in pilot experiments by investigating the biogas properties, process stability, substrate degradation and enzyme activities at different stages of mesophilic fermentation. The results showed that 30 and 100 mg/L Cu addition increased the cumulative biogas yields by up to 43.62 and 20. Read More

    Characterization of methyl parathion degradation by a Burkholderia zhejiangensis strain, CEIB S4-3, isolated from agricultural soils.
    Biodegradation 2017 12 11;28(5-6):351-367. Epub 2017 Jul 11.
    Laboratorio de Investigaciones Ambientales, Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, C.P. 62209, Cuernavaca, Morelos, Mexico.
    Through the use of an enrichment technique, we isolated from the agricultural soils of Morelos in central México a strain of Burkholderia zhejiangensis identified as CEIB S4-3, it's could use the pesticide methyl parathion (MP) as the only source of carbon and degrade completely p-nitrophenol (PNP). For more efficient MP and PNP degradation by the CEIB S4-3 strain, the absence of an extra carbon source, a large inoculum and an MP concentration up to 50 mg/l are required. Sequence and annotation analysis of the draft genome, showed presence of mpd functional gene, which was expressed and its activity on the MP was confirmed. Read More

    Characteristics of nitrogen removal and microbial community in biofilm system via combination of pretreated lignocellulosic carriers and various conventional fillers.
    Biodegradation 2017 12 5;28(5-6):337-349. Epub 2017 Jul 5.
    School of Marine Science and Technology, Zhejiang Ocean University, No.1 Haida South Road, Zhoushan, 316022, China.
    Each kind of conventional plastic filler (polyurethane filler, SPR-1 suspension filler, TA-II elastic filler and sphere filler) coupled with alkaline pretreated corncob (A.H.corncob) was applied in each bioreactor system for treating polluted water with nitrate and organics. Read More

    Dimethyl sulfide emission behavior from landfill site with air and water control.
    Biodegradation 2017 12 3;28(5-6):327-335. Epub 2017 Jul 3.
    Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
    Municipal solid waste landfills are responsible for odors affecting the environment and human health. Dimethyl sulfide (DMS) is one of the major odorous compounds known for its low odor threshold and wide distribution. This study examined the generation, migration and emission of DMS in four artificial landfill-simulating reactors: Reactor 1 and Reactor 2, running under anaerobic and semi-aerobic conditions, respectively, without leachate recirculation; and Reactor 3 and Reactor 4, running under anaerobic and semi-aerobic conditions, respectively, with leachate recirculation. Read More

    The effect of biodegradation on gammacerane in crude oils.
    Biodegradation 2017 08 27;28(4):313-326. Epub 2017 Jun 27.
    School of Geosciences, Yangtze University, Wuhan, 430100, Hubei, People's Republic of China.
    Gammacerane is one of the major biomarkers widely used in depositional environment diagnosis, oil family classification, and oil-source correlation. It is generally accepted that gammacerane is more resistant to biodegradation than regular hopanes. However, whether it is biodegradable as well has not been reported in literatures. Read More

    Low temperature, autotrophic microbial denitrification using thiosulfate or thiocyanate as electron donor.
    Biodegradation 2017 08 2;28(4):287-301. Epub 2017 Jun 2.
    Centre for Ecology and Evolution in Microbial Model Systems (EEMiS), Linnaeus University, Kalmar, Sweden.
    Wastewaters generated during mining and processing of metal sulfide ores are often acidic (pH < 3) and can contain significant concentrations of nitrate, nitrite, and ammonium from nitrogen based explosives. In addition, wastewaters from sulfide ore treatment plants and tailings ponds typically contain large amounts of inorganic sulfur compounds, such as thiosulfate and tetrathionate. Release of these wastewaters can lead to environmental acidification as well as an increase in nutrients (eutrophication) and compounds that are potentially toxic to humans and animals. Read More

    Anaerobic digestion of amine-oxide-based surfactants: biodegradation kinetics and inhibitory effects.
    Biodegradation 2017 08 31;28(4):303-312. Epub 2017 May 31.
    Chemical Engineering Department, University of Granada, Campus Fuentenueva, 18071, Granada, Spain.
    Recently, anaerobic degradation has become a prevalent alternative for the treatment of wastewater and activated sludge. Consequently, the anaerobic biodegradability of recalcitrant compounds such as some surfactants require a thorough study to avoid their presence in the environment. In this work, the anaerobic biodegradation of amine-oxide-based surfactants, which are toxic to several organisms, was studied by measuring of the biogas production in digested sludge. Read More

    Optimization of continuous-flow solid-phase denitrification via coupling carriers in enhancing simultaneous removal of nitrogen and organics for agricultural runoff purification.
    Biodegradation 2017 08 22;28(4):275-285. Epub 2017 May 22.
    Department of Environmental Science and Engineering, Zhejiang Ocean University, No.1 Haida South Road, Zhoushan, 316022, China.
    Coupling of biodegradable corncob and plastic carrier was optimized in continuous-flow solid-phase denitrification systems for enhancing simultaneously removal of nitrogen and organics in agricultural runoff. In compared with preposition of plastic carriers and mixed distribution method, it was demonstrated that the preposition of corncobs simultaneously enhanced nitrate (6.64 ± 1. Read More

    Nitrogen removal performance and operation strategy of anammox process under temperature shock.
    Biodegradation 2017 08 5;28(4):261-274. Epub 2017 May 5.
    School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, China.
    Sequencing batch reactors were used to study anaerobic ammonium oxidation (anammox) process under temperature shock. Both long-term (15-35 °C) and short-term (10-50 °C) temperature effects on nitrogen removal performance were performed. In reactor operation test, the results indicated that ammonium removal rate decreased from 0. Read More

    Performance and kinetics of ANAMMOX granular sludge with pH shock in a sequencing batch reactor.
    Biodegradation 2017 08 29;28(4):245-259. Epub 2017 Apr 29.
    National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing, 100081, China.
    As an efficient and cost-effective nitrogen removal process, anaerobic ammonium oxidation (ANAMMOX) could be well operated at suitable pH condition. However, pH shock occurred in different kinds of wastewater and affected ANANNOX process greatly. The present research aimed at studying the performance and kinetics of ANAMMOX granular sludge with pH shock. Read More

    Response of performance and bacterial community to oligotrophic stress in biofilm systems for raw water pretreatment.
    Biodegradation 2017 08 28;28(4):231-244. Epub 2017 Apr 28.
    Department of Environmental Engineering, Zhejiang Ocean University, No.1 Haida South Road, Zhoushan, 316022, People's Republic of China.
    Understanding the dynamics of performance and bacterial community of biofilm under oligotrophic stress is necessary for the process optimization and risk management in biofilm systems for raw water pretreatment. In this study, biofilm obtained from a pilot-scale biofilm reactor was inoculated into a pilot-scale experimental tank for the treatment of oligotrophic raw water. Results showed that the removal of NH-N was impaired in biofilm systems when influent NH-N was less than 0. Read More

    Changes in the microbial community during repeated anaerobic microbial dechlorination of pentachlorophenol.
    Biodegradation 2017 06 29;28(2-3):219-230. Epub 2017 Mar 29.
    Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou, 510650, People's Republic of China.
    Pentachlorophenol (PCP) has been widely used as a pesticide in paddy fields and has imposed negative ecological effect on agricultural soil systems, which are in typically anaerobic conditions. In this study, we investigated the effect of repeated additions of PCP to paddy soil on the microbial communities under anoxic conditions. Acetate was added as the carbon source to induce and accelerate cycles of the PCP degradation. Read More

    Enhanced roles of biochar and organic fertilizer in microalgae for soil carbon sink.
    Biodegradation 2017 Mar 20. Epub 2017 Mar 20.
    Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China.
    Improved soil carbon sink capability is important for the mitigation of carbon dioxide emissions and the enhancement of soil productivity. Biochar and organic fertilizer (OF) showed a significant improving effect on microalgae in soil carbon sink capacity, and the ultimate soil total organic carbons with microalgae-OF, microalgae-biochar, microalgae-OF-biochar were about 16, 67 and 58% higher than that with microalgae alone, respectively, indicating that carbon fixation efficiency of microalgae applied in soil was improved with biochar and OF whilst the soil carbon capacity was promoted, the mechanism of which is illustrated through simulative experiments. Organic fertilizer could spur algal conversion of carbon into cell molecules by increasing intracellular polysaccharide production of microalgae. Read More

    Impact of biogenic substrates on sulfamethoxazole biodegradation kinetics by Achromobacter denitrificans strain PR1.
    Biodegradation 2017 06 11;28(2-3):205-217. Epub 2017 Mar 11.
    UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Lisbon, Portugal.
    Pure cultures have been found to degrade pharmaceutical compounds. However, these cultures are rarely characterized kinetically at environmentally relevant concentrations. This study investigated the kinetics of sulfamethoxazole (SMX) degradation by Achromobacter denitrificans strain PR1 at a wide range of concentrations, from ng/L to mg/L, to assess the feasibility of using it for bioaugmentation purposes. Read More

    The metabolic pathway of metamifop degradation by consortium ME-1 and its bacterial community structure.
    Biodegradation 2017 06 6;28(2-3):181-194. Epub 2017 Mar 6.
    State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211816, People's Republic of China.
    Metamifop is universally used in agriculture as a post-emergence aryloxyphenoxy propionate herbicide (AOPP), however its microbial degradation mechanism remains unclear. Consortium ME-1 isolated from AOPP-contaminated soil can degrade metamifop completely after 6 days and utilize it as the carbon source for bacterial growth. Meanwhile, consortium ME-1 possessed the ability to degrade metamifop stably under a wide range of pH (6. Read More

    Simultaneous di-oxygenation and denitrification in an internal circulation baffled bioreactor.
    Biodegradation 2017 06 4;28(2-3):195-203. Epub 2017 Mar 4.
    Biodesign Swette Center for Environmental Biotechnology, Arizona State University, Tempe, AZ, 85287-5701, USA.
    An internal circulation baffled bioreactor was employed to realize simultaneous di-oxygenation of phthalic acid (PA) and denitrification of nitrate, which require aerobic and anoxic conditions, respectively. Adding a small concentration of succinate as an exogenous electron donor stimulated PA di-oxygenation, which produced readily oxidizable downstream products whose oxidation also enhanced denitrification of nitrate; succinate addition also stimulated denitrification. Depending on the concentration of PA, addition of 0. Read More

    Important amino acid residues of hexachlorocyclohexane dehydrochlorinases (LinA) for enantioselective transformation of hexachlorocyclohexane isomers.
    Biodegradation 2017 06 1;28(2-3):171-180. Epub 2017 Mar 1.
    Academy of Scientific and Innovative Research, New Delhi, India.
    LinA-type1 and LinA-type2 are two well-characterized variants of the enzyme 'hexachlorocyclohexane (HCH)-dehydrochlorinase'. They differ from each other at ten amino acid positions and exhibit differing enantioselectivity for the transformation of the (-) and (+) enantiomers of α-HCH. Amino acids responsible for this enantioselectivity, however, are not known. Read More

    Nitrogen removal performance of anaerobic ammonia oxidation (ANAMMOX) in presence of organic matter.
    Biodegradation 2017 06 9;28(2-3):159-170. Epub 2017 Feb 9.
    School of Environmental Science and Engineering, Qingdao University, Qingdao, 266071, China.
    A sequencing batch reactor (SBR) was used to test the nitrogen removal performance of anaerobic ammonium oxidation (ANAMMOX) in presence of organic matter. Mesophilic operation (30 ± 0.5 °C) was performed with influent pH 7. Read More

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