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    1328 results match your criteria Biodegradation[Journal]

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    Whole community transcriptome of a sequencing batch reactor transforming 2,4-dinitroanisole (DNAN) and 3-nitro-1,2,4-triazol-5-one (NTO).
    Biodegradation 2017 Nov 16. 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 2017 Nov 16. 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 2017 Nov 11. 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 2017 Oct 28. 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 A2N-MBR and A2NO-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(-1). Read More

    Biodegradation and chemotaxis of polychlorinated biphenyls, biphenyls, and their metabolites by Rhodococcus spp.
    Biodegradation 2017 Oct 19. 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 Dec 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 Dec 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-RHDα gene detected in the heavy DNA fraction of (13)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 Dec 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 Dec 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 Dec 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 Dec 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 Dec 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 CuCl2) 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(2+) 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 Dec 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 Dec 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 Dec 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 Aug 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 Aug 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 Aug 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 Aug 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 Aug 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 Aug 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 Aug 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 NH4(+)-N was impaired in biofilm systems when influent NH4(+)-N was less than 0. Read More

    Changes in the microbial community during repeated anaerobic microbial dechlorination of pentachlorophenol.
    Biodegradation 2017 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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 Jun 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

    Characterization of a novel micro-pressure swirl reactor for removal of chemical oxygen demand and total nitrogen from domestic wastewater at low temperature.
    Biodegradation 2017 Jun 6;28(2-3):145-157. Epub 2017 Feb 6.
    Jilin Engineering Research Centre for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun, 130117, China.
     A novel micro-pressure swirl reactor (MPSR) was designed and applied to treat domestic wastewater at low temperature by acclimating microbial biomass with steadily decreasing temperature from 15 to 3 °C. Chemical oxygen demand (COD) was constantly removed by 85% and maintained below 50 mg L(-1) in the effluent during the process. When the air flow was controlled at 0. Read More

    Biodegradation of 5-chloro-2-picolinic acid by novel identified co-metabolizing degrader Achromobacter sp. f1.
    Biodegradation 2017 Jun 2;28(2-3):139-144. Epub 2017 Feb 2.
    Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, People's Republic of China.
    Several bacteria have been isolated to degrade 4-chloronitrobenzene. Degradation of 4-chloronitrobenzene by Cupriavidus sp. D4 produces 5-chloro-2-picolinic acid as a dead-end by-product, a potential pollutant. Read More

    Advanced oxidation process and biological treatments for table olive processing wastewaters: constraints and a novel approach to integrated recycling process: a review.
    Biodegradation 2017 Jun 23;28(2-3):125-138. Epub 2017 Jan 23.
    Laboratory of Microbial Ecology and Technology, Department of Biological and Chemical Engineering, National Institute of Applied Sciences and Technology (INSAT), Carthage University, B.P. 676, 1080, Tunis, Tunisia.
    Table olive processing wastewaters constitute a dangerous environmental problem in the Mediterranean countries because of their large volumes, high organic matter and salt concentration. The quantity and the characteristics of wastewaters produced, and thus, their environmental impact, varied depending on the season, varieties, soil and process employed. Several chemicals, biological and combined technologies have proven effective at bringing down organic pollution and toxicity of these effluents. Read More

    Biotransformation of 2,4-dinitroanisole by a fungal Penicillium sp.
    Biodegradation 2017 Feb 2;28(1):95-109. Epub 2016 Dec 2.
    Civil & Environmental Engineering, The University of Iowa, Iowa City, IA, 52242, USA.
    Insensitive munitions explosives are new formulations that are less prone to unintended detonation compared to traditional explosives. While these formulations have safety benefits, the individual constituents, such as 2,4-dinitroanisole (DNAN), have an unknown ecosystem fate with potentially toxic impacts to flora and fauna exposed to DNAN and/or its metabolites. Fungi may be useful in remediation and have been shown to degrade traditional nitroaromatic explosives, such as 2,4,6-trinitrotoluene and 2,4-dinitrotoluene, that are structurally similar to DNAN. Read More

    Performance improvement of raw water pretreatment process with pre-inoculation biofilm: feasibility and limiting factors.
    Biodegradation 2017 Feb 2;28(1):111-123. Epub 2016 Dec 2.
    Department of Environmental Engineering, Zhejiang University, No. 866 Yuhangtang Road, Hangzhou, 310058, People's Republic of China.
    The initial formation of biofilm and the removal performance of pollutants in biological pretreatment process for polluted raw water were limited due to the oligotrophic niche in raw water. In this study, the feasibility of using pre-inoculation biofilm formed under nutrients enhanced condition for polluted raw water treatment was analyzed in nine batch reactors. Results showed that the pollutants removal performance of biofilm was improved under nutrients enhanced conditions. Read More

    Respirometric response and microbial succession of nitrifying sludge to m-cresol pulses in a sequencing batch reactor.
    Biodegradation 2017 Feb 30;28(1):81-94. Epub 2016 Nov 30.
    Facultad de Ingeniería Química, Universidad Autónoma de Yucatán, Campus de Ingenierías y Ciencias Exactas periférico norte km 33.5, C.P. 97203, Mérida, Yucatán, Mexico.
    A nitrifying consortium was kinetically, stoichiometrically and molecularly characterized via the in situ pulse respirometric method and pyrosequencing analysis before and after the addition of m-cresol (25 mg C L(-1)) in a sequencing batch reactor (SBR). Five important kinetic and stoichiometric parameters were determined: the maximum oxygen uptake rate, the maximum nitrification rate, the oxidation yield, the biomass growth yield, and the substrate affinity constant. An inhibitory effect was observed in the nitrification process with a recovery of this by up to eight SBR cycles after m-cresol was added to the system. Read More

    Anammox-zeolite system acting as buffer to achieve stable effluent nitrogen values.
    Biodegradation 2017 Feb 2;28(1):69-79. Epub 2016 Nov 2.
    Department of Bioengineering, Marmara University, Goztepe, 34722, Istanbul, Turkey.
    For a successful nitrogen removal, Anammox process needs to be established in line with a stable partial nitritation pretreatment unit since wastewater influent is mostly unsuitable for direct treatment by Anammox. Partial nitritation is, however, a critical bottleneck for the nitrogen removal since it is often difficult to maintain the right proportions of NO2-N and NH4-N during long periods of time for Anammox process. This study investigated the potential of Anammox-zeolite biofilter to buffer inequalities in nitrite and ammonium nitrogen in the influent feed. Read More

    Effect of iron ions (Fe(2+), Fe(3+)) on the formation and structure of aerobic granular sludge.
    Biodegradation 2017 Feb 21;28(1):53-68. Epub 2016 Oct 21.
    Department of Environmental Engineering, Faculty of Engineering, Istanbul University, Avcilar, 34320, Istanbul, Turkey.
    Aerobic granulation is a promising technology for wastewater treatment, but problems regarding its formation and stability need to be solved. Divalent metal ions, especially Ca(2+), Mg(2+) and Mn(2+), have been demonstrated to play an important role in the process of aerobic granulation. Here, we studied whether iron ions can affect aerobic granulation. Read More

    Biological degradation of 4-chlorobenzoic acid by a PCB-metabolizing bacterium through a pathway not involving (chloro)catechol.
    Biodegradation 2017 Feb 20;28(1):37-51. Epub 2016 Oct 20.
    Department of Microbiology, Faculty of Science, University of Lagos, Akoka, Yaba, Lagos, Nigeria.
    Cupriavidus sp. strain SK-3, previously isolated on polychlorinated biphenyl mixtures, was found to aerobically utilize a wide spectrum of substituted aromatic compounds including 4-fluoro-, 4-chloro- and 4-bromobenzoic acids as a sole carbon and energy source. Other chlorobenzoic acid (CBA) congeners such as 2-, 3-, 2,3-, 2,5-, 3,4- and 3,5-CBA were all rapidly transformed to respective chlorocatechols (CCs). Read More

    Kinetic and microbial community analysis of methyl ethyl ketone biodegradation in aquifer sediments.
    Biodegradation 2017 Feb 20;28(1):27-36. Epub 2016 Oct 20.
    Civil & Environmental Engineering, Virginia Tech, 750 Drillfield, Blacksburg, VA, 24061-0105, USA.
    Methyl ethyl ketone (MEK) is a common groundwater contaminant often present with more toxic compounds of primary interest. Because of this, few studies have been performed to determine the effect of microbial community structure on MEK biodegradation rates in aquifer sediments. Here, microcosms were prepared with aquifer sediments containing MEK following a massive spill event and compared to laboratory-spiked sediments, with MEK biodegradation rates quantified under mixed aerobic/anaerobic conditions. Read More

    Biogas properties and enzymatic analysis during anaerobic fermentation of Phragmites australis straw and cow dung: influence of nickel chloride supplement.
    Biodegradation 2017 Feb 7;28(1):15-25. Epub 2016 Oct 7.
    School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
    The importance of nickel (added as NiCl2) on mesophilic anaerobic fermentation of Phragmites australis straw and cow dung was demonstrated by investigating the biogas properties, pH values, organic matter degradation [chemical oxygen demand (COD)] and enzyme activities (cellulase, protease and dehydrogenase) during the fermentation process. The results showed that Ni(2+) addition increased the cumulative biogas yields by >18 % by improving the efficiency of first peak stage and bringing forward the second peak stage. The pH values were not significantly influenced by Ni(2+) addition (p > 0. Read More

    Biodegradation of nonionic and anionic surfactants in domestic wastewater under simulated sewer conditions.
    Biodegradation 2017 Feb 23;28(1):1-14. Epub 2016 Sep 23.
    The Procter and Gamble Company, 8700 South Mason Montgomery Road, Mason, OH, 45040, USA.
    The ultimate disposition of chemicals discarded down the drain can be substantially impacted by their fate in the sewer, but to date limited data have been published on the biodegradability of chemicals in sewer systems. The recently established OECD 314 guideline (Simulation tests to assess the biodegradability of chemicals discharged in wastewater, 2008) contains a simulation method (314A) for evaluating the biodegradation of chemicals in sewage under simulated sewer conditions. This research used the OECD 314A method to evaluate the rates and pathways of primary and ultimate biodegradation of a suite of (14)C-labeled homologues representing four classes of high volume surfactants including nonionic alkyl ethoxylates (AE), and anionic alkyl ethoxysulfates (AES), alkyl sulfate (AS) and linear alkyl benzene sulfonate (LAS). Read More

    Performance of trichlorfon degradation by a novel Bacillus tequilensis strain PA F-3 and its proposed biodegradation pathway.
    Biodegradation 2016 Nov 8;27(4-6):265-276. Epub 2016 Sep 8.
    School of Resource and Environmental Sciences, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan, 430079, People's Republic of China.
    The novel trichlorfon (TCF)-degrading bacterium PA F-3, identified as Bacillus tequilensis, was isolated from pesticide-polluted soils by using an effective screening and domesticating procedure. The TCF biodegradation pathways of PA F-3 were also systematically elucidated. As revealed by high-performance liquid chromatography, the TCF residues in the mineral salt medium demonstrated that PA F-3 can utilize TCF as its sole carbon source and reach the highest degradation of 71. Read More

    1,4-Dioxane degradation potential of members of the genera Pseudonocardia and Rhodococcus.
    Biodegradation 2016 Nov 13;27(4-6):277-286. Epub 2016 Sep 13.
    Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.
    In recent years, several strains capable of degrading 1,4-dioxane have been isolated from the genera Pseudonocardia and Rhodococcus. This study was conducted to evaluate the 1,4-dioxane degradation potential of phylogenetically diverse strains in these genera. The abilities to degrade 1,4-dioxane as a sole carbon and energy source and co-metabolically with tetrahydrofuran (THF) were evaluated for 13 Pseudonocardia and 12 Rhodococcus species. Read More

    Treatment of raw and ozonated oil sands process-affected water under decoupled denitrifying anoxic and nitrifying aerobic conditions: a comparative study.
    Biodegradation 2016 Nov 24;27(4-6):247-264. Epub 2016 Aug 24.
    Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, T6G 1H9, Canada.
    Batch experiments were performed to evaluate biodegradation of raw and ozonated oil sands process-affected water (OSPW) under denitrifying anoxic and nitrifying aerobic conditions for 33 days. The results showed both the anoxic and aerobic conditions are effective in degrading OSPW classical and oxidized naphthenic acids (NAs) with the aerobic conditions demonstrating higher removal efficiency. The reactors under nitrifying aerobic condition reduced the total classical NAs of raw OSPW by 69. Read More

    Effects of sulfur-metabolizing bacterial community diversity on H2S emission behavior in landfills with different operation modes.
    Biodegradation 2016 Nov 11;27(4-6):237-246. Epub 2016 Jul 11.
    Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310012, China.
    Hydrogen sulfide (H2S) is one of the major contributors to offensive odors from landfills, and its concentration differs under different operation modes. This study examined the distribution of H2S emission from different landfill depths under different operation modes (anaerobic, semi-aerobic, semi-aerobic transformation, and the three operation modes with additional leachate recirculation). The microbial community (especially the sulfur-metabolizing bacterial community) was investigated using high-throughput sequencing technology. Read More

    Assessment of biostimulation and bioaugmentation for removing chlorinated volatile organic compounds from groundwater at a former manufacture plant.
    Biodegradation 2016 Nov 28;27(4-6):223-236. Epub 2016 Jun 28.
    Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environmental Sciences, Peking University, 100871, Beijing, China.
    Site in a former chemical manufacture plant in China was found contaminated with high level of chlorinated volatile organic compounds (CVOCs). The major contaminants chloroform (CF), 1,2-dichloroethane (1,2-DCA) and vinyl chloride (VC) in groundwater were up to 4.49 × 10(4), 2. Read More

    Nitrogen removal via simultaneous partial nitrification, anammox and denitrification (SNAD) process under high DO condition.
    Biodegradation 2016 Nov 21;27(4-6):195-208. Epub 2016 Jun 21.
    The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100124, China.
    The simultaneous partial nitrification, anammox and denitrification (SNAD) process for treating domestic wastewater was investigated in a sequencing batch reactor (SBR). The SBR was operated with air flow rate of 500 L h(-1) at 30 °C. Domestic wastewater was used as influent and Kaldnes rings were used as biomass carriers. Read More

    Monitoring the biodegradability of bisphenol A and its metabolic intermediates by manometric respirometry tests.
    Biodegradation 2016 Nov 9;27(4-6):209-221. Epub 2016 Jun 9.
    Fac. de Cs. Exactas Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), UNLP, Calle 115 y 47(s/n), CP (1900), La Plata, Buenos Aires, Argentina.
    As a result of its wide usage in the production of polycarbonate plastics and epoxy resins, bisphenol A (BPA) is commonly detected in wastewaters. Recently, BPA became a major concern because its adverse effects as an endocrine disruptor. In this work, the biodegradation kinetics of BPA and its metabolic intermediates 4-hydroxyacetophenone (4HAP), 4-hydroxybenzaldehyde (4HB) and 4-hydroxybenzoic acid (4HBA) by BPA-acclimated activated sludge was studied using manometric respirometry (BOD) tests. Read More

    Laboratory and field scale bioremediation of hexachlorocyclohexane (HCH) contaminated soils by means of bioaugmentation and biostimulation.
    Biodegradation 2016 Jun 3;27(2-3):179-93. Epub 2016 May 3.
    Department of Zoology, University of Delhi, Delhi, 110007, India.
    Hexachlorocyclohexane (HCH) contaminated soils were treated for a period of up to 64 days in situ (HCH dumpsite, Lucknow) and ex situ (University of Delhi) in line with three bioremediation approaches. The first approach, biostimulation, involved addition of ammonium phosphate and molasses, while the second approach, bioaugmentation, involved addition of a microbial consortium consisting of a group of HCH-degrading sphingomonads that were isolated from HCH contaminated sites. The third approach involved a combination of biostimulation and bioaugmentation. Read More

    Effects of solid-phase denitrification on the nitrate removal and bacterial community structure in recirculating aquaculture system.
    Biodegradation 2016 Jun 28;27(2-3):165-78. Epub 2016 Apr 28.
    Beijing Agro-Biotechnology Research Center, Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing Academy of Agriculture and Forestry Sciences, Haidian District, Beijing, 100097, People's Republic of China.
    A solid-phase denitrification (SPD) reactor packed with poly (3-hydroxybutyrate-co-3-hydroxyvalerate) as a carbon source was incorporated into a recirculating aquaculture system (RAS) to remove accumulated nitrate. Bacterial community structures in different parts of the RAS, including biofilter unit, SPD reactor, and culture water, were analyzed using Illumina MiSeq sequencing technology. The data showed that nitrate levels decreased remarkably in the RAS connected with SPD reactor (RAS-DR). Read More

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