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  • 1
    Language: English
    In: Journal of Environmental Management, Oct 15, 2013, Vol.128, p.522(8)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jenvman.2013.06.004 Byline: Mini Bajaj, Josef Winter Abstract: High strength automobile industry wastewater, collected from decanters (DECA) of the pre-treatment plant after oil, grease and sludge separation, was investigated for production of methane in the absence and presence of glucose or excess aerobic sludge (AS) from a lab scale suspension reactor as co-substrates. The highest methane production from DECA wastewater was 335.4 L CH.sub.4/kg COD.sub.soluble removal which decreased in the presence of the co-substrates to 232.5 (with 2 g/L glucose) and to 179 (with 40% AS) L CH.sub.4/kg COD.sub.soluble removal, respectively. Around 95% of total methane was produced within 5 days of incubation of DECA at 37 [degrees]C when no co-substrate was added. Addition of co-substrates did not improve biodegradation of DECA but overall methane production from DECA + co-substrates was increased due to co-substrate biodegradation. The anaerobic inoculum, capable of producing 2.4 mol of hydrogen/mol of glucose under zinc induced inhibitory conditions, was unable to produce hydrogen from DECA as substrate under the same conditions. Author Affiliation: Institute of Biology for Engineers and Biotechnology of Wastewater, Am Fasanengarten, Karlsruhe Institute of Technology, 76133 Karlsruhe, Germany Article History: Received 4 February 2013; Revised 5 June 2013; Accepted 11 June 2013
    Keywords: Methane ; Automobiles ; Biomass Energy ; Biogas ; Glucose Metabolism ; Biodegradation ; Automobile Industry ; Wastewater ; Glucose
    ISSN: 0301-4797
    Source: Cengage Learning, Inc.
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  • 2
    Language: English
    In: Journal of environmental management, 2013, Vol.128, pp.522-529
    Description: High strength automobile industry wastewater, collected from decanters (DECA) of the pre-treatment plant after oil, grease and sludge separation, was investigated for production of methane in the absence and presence of glucose or excess aerobic sludge (AS) from a lab scale suspension reactor as co-substrates. The highest methane production from DECA wastewater was 335.4 L CH₄/kg CODₛₒₗᵤbₗₑ removal which decreased in the presence of the co-substrates to 232.5 (with 2 g/L glucose) and to 179 (with 40% AS) L CH₄/kg CODₛₒₗᵤbₗₑ removal, respectively. Around 95% of total methane was produced within 5 days of incubation of DECA at 37 °C when no co-substrate was added. Addition of co-substrates did not improve biodegradation of DECA but overall methane production from DECA + co-substrates was increased due to co-substrate biodegradation. The anaerobic inoculum, capable of producing 2.4 mol of hydrogen/mol of glucose under zinc induced inhibitory conditions, was unable to produce hydrogen from DECA as substrate under the same conditions. ; p. 522-529.
    Keywords: Zinc ; Biodegradation ; Wastewater ; Methane ; Biogas ; Oils ; Sludge ; Hydrogen Production ; Methane Production ; Pretreatment ; Hydrogen ; Glucose ; Inoculum ; Industry
    ISSN: 0301-4797
    Source: AGRIS (Food and Agriculture Organization of the United Nations)
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  • 3
    Language: English
    In: Journal of Environmental Management, 15 October 2013, Vol.128, pp.522-529
    Description: High strength automobile industry wastewater, collected from decanters (DECA) of the pre-treatment plant after oil, grease and sludge separation, was investigated for production of methane in the absence and presence of glucose or excess aerobic sludge (AS) from a lab scale suspension reactor as co-substrates. The highest methane production from DECA wastewater was 335.4 L CH /kg COD removal which decreased in the presence of the co-substrates to 232.5 (with 2 g/L glucose) and to 179 (with 40% AS) L CH /kg COD removal, respectively. Around 95% of total methane was produced within 5 days of incubation of DECA at 37 °C when no co-substrate was added. Addition of co-substrates did not improve biodegradation of DECA but overall methane production from DECA + co-substrates was increased due to co-substrate biodegradation. The anaerobic inoculum, capable of producing 2.4 mol of hydrogen/mol of glucose under zinc induced inhibitory conditions, was unable to produce hydrogen from DECA as substrate under the same conditions.
    Keywords: Auto-Industry Wastewater ; High Cod ; Anaerobic Fermentation ; Co-Substrate ; Aerobic Sludge ; Zinc Inhibition ; Environmental Sciences ; Economics
    ISSN: 0301-4797
    E-ISSN: 1095-8630
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  • 4
    Language: English
    In: Journal of Hazardous Materials, 2011, Vol.189(3), pp.640-646
    Description: Soil and groundwater samples were collected for bulk elemental analyses in particular for selenium (Se) concentrations from six agricultural sites located in states of Punjab and Haryana in North-West India. Toxic concentrations of Se (45–341 μg L ) were present in groundwater (76 m deep) of Jainpur and Barwa villages in Punjab. Selenium enrichments were also found in top soil layers (0–15 cm) of Jainpur (2.3–11.6 mg kg ) and Barwa (3.1 mg kg ). Mineralogical analyses confirmed silicates and phyllosilicates as main components of these soils, also reflected by the high content of SiO (40–62 wt.%), Al O (9–21 wt.%) and K O (2.2–3.2 wt.%). Prevailing intensive irrigation practices in Punjab with Se enriched groundwater may be the cause of Se accumulation in soils. Sequential extraction revealed 〉50% Se bioavailability in Jainpur soils. Appearance of selenite was observed in some of the batch assays with soil slurries under reducing conditions. Although safe Se concentrations were found in Hisar, Haryana, yet high levels of As, Mo and U present in groundwater indicated its unsuitability for drinking purposes. Detailed biogeochemical studies of Se in sediments or groundwater of Punjab are not available so far; intensive investigations should be started for better understanding of the problem of Se toxicity.
    Keywords: Selenium ; Agricultural Soil ; Irrigation Water ; Elemental Analyses ; Mineralogical Analyses ; Selenate Reduction ; Engineering ; Law
    ISSN: 0304-3894
    E-ISSN: 1873-3336
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  • 5
    Language: English
    In: Water Research, 2010, Vol.44(4), pp.1279-1287
    Description: Retention of bacterial cells as “particles” by silica sand during formation of a capillary fringe (CF) and the influence of motility was examined with motile and non-motile suspensions in the absence of nutrients. The fractional retention of cells at all regions of the CF was higher than for cells, most probably due to the motility of . Only about 5% of cells and almost no cells reached the upper end of a CF of 10 cm height. With cell suspensions of and in nutrient broth the development of a CF in silica sand fractions of 355–710 μm and 710–1000 μm respectively, was finished after about 6 h. Growth of cells proceeded for about 6 days. formed a biofilm on silica grains, whereas no attachment of on silica sand occurred. Relative cell densities of on the bottom and in the upper regions of the CF were always lower than those of and were also lower than those reached in suspended cultures with the same medium. In coarse sand the motile cells reached significantly higher cell densities in upper CF regions than in fine sand. Growth of in the CF apparently was slower and a higher proportion of the energy was required for maintenance. Whereas cell densities of , in CFs of both sand fractions, varied less than one order of magnitude, those of varied in a wider range from the basis to the top of the CF. Analyses of the esterase activity of and with fluorescein diacetate (FDA) revealed that the cells in higher CF regions were significantly more active than those at the bottom of the CF. Furthermore, a significant correlation (  = 0.66,  〈 0.01) between cells ml and the FDA conversion to fluorescein was found.
    Keywords: Capillary Fringe ; Pseudomonas Putida ; Corynebacterium Glutamicum ; Distribution ; Motility ; Fluorescein Diacetate ; Engineering
    ISSN: 0043-1354
    E-ISSN: 1879-2448
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  • 6
    Language: English
    In: Bioresource Technology, Sept, 2014, Vol.168, p.23(10)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.biortech.2014.02.118 Byline: Chaoran Li, Christoph Mortelmaier, Josef Winter, Claudia Gallert Abstract: acents Dry anaerobic digestion needs [greater than or equal to]75% moisture. acents Methanosarcinales dominate, no Methanosaeta spec. acents Biogas/methane rates and amounts are equal at 37 and 55[degrees]C. Article History: Received 19 December 2013; Revised 23 February 2014; Accepted 25 February 2014
    ISSN: 0960-8524
    Source: Cengage Learning, Inc.
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  • 7
    Language: English
    In: Bioresource Technology, August, 2014, Vol.166, p.479(6)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.biortech.2014.05.085 Byline: Christoph Moertelmaier, Chaoran Li, Josef Winter, Claudia Gallert Abstract: acents Wet anaerobic digestion of biowaste. acents Adaptive substrate supply during re-start. acents Fatty acid formation and degradation. acents Population dynamics during metabolic stabilization. Article History: Received 21 March 2014; Revised 25 March 2014; Accepted 22 May 2014
    Keywords: Fatty Acids -- Physiological Aspects
    ISSN: 0960-8524
    Source: Cengage Learning, Inc.
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  • 8
    Language: English
    In: Applied Microbiology and Biotechnology, 2010, Vol.88(6), pp.1363-1371
    Description: Anaerobic growth of a newly isolated Pseudomonas putida strain WB from an arsenic-contaminated soil in West Bengal, India on glucose, l -lactate, and acetate required the presence of arsenate, which was reduced to arsenite. During aerobic growth in the presence of arsenite arsenate was formed. Anaerobic growth of P. putida WB on glucose was made possible presumably by the non-energy-conserving arsenate reductase ArsC with energy derived only from substrate level phosphorylation. Two moles of acetate were generated intermediarily and the reducing equivalents of glycolysis and pyruvate decarboxylation served for arsenate reduction or were released as H 2 . Anaerobic growth on acetate and lactate was apparently made possible by arsenate reductase ArrA coupled to respiratory electron chain energy conservation. In the presence of arsenate, both substrates were totally oxidized to CO 2 and H 2 with part of the H 2 serving for respiratory arsenate reduction to deliver energy for growth. The growth yield for anaerobic glucose degradation to acetate was Y Glucose  = 20 g/mol, leading to an energy coefficient of Y ATP  = 10 g/mol adenosine-5'-triphosphate (ATP), if the Emden–Meyerhof–Parnas pathway with generation of 2 mol ATP/mol glucose was used. During growth on lactate and acetate no substrate chain phosphorylation was possible. The energy gain by reduction of arsenate was Y Arsenate  = 6.9 g/mol, which would be little less than one ATP/mol of arsenate.
    Keywords: Pseudomonas putida ; Arsenate ; Hydrogen ; Glucose ; Acetate ; Lactate
    ISSN: 0175-7598
    E-ISSN: 1432-0614
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  • 9
    Language: English
    In: Journal of Hazardous Materials, Nov 15, 2013, Vol.262, p.941(10)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jhazmat.2013.01.044 Byline: Harald Neidhardt (a), Zsolt Berner (a), Dominik Freikowski (b), Ashis Biswas (c), Josef Winter (b), Debashis Chatterjee (d), Stefan Norra (e) Keywords: Arsenic; Groundwater; Bengal Delta Plain; Spatiotemporal trends; Monitoring; Pumping Abbreviations: m bls, meters below land surface; BDP, Bengal Delta Plain; TEA, terminal electron acceptor; FeRB, iron-reducing bacteria; DARPs, dissimilative arsenate respiring prokaryotes; As.sub.tot, total As concentration; K, coefficient of hydraulic conductivity; TA, total alkalinity; DOC, dissolved organic carbon; TOC, total organic carbon; GMWL, global meteoric water line; r, Pearson correlation coefficient; LMWL, local meteoric water line Abstract: a* Spatiotemporal trends occur in arsenic contents of shallow groundwater in West Bengal. a* We simulate pumping to record changes in the distribution of dissolved arsenic. a* Pumping induces enduring effects on hydrochemically stratified water columns. a* Arsenic-safe water resources are vulnerable toward anthropogenic disturbances. Author Affiliation: (a) Institute of Mineralogy and Geochemistry, Karlsruhe Institute of Technology, Adenauerring 20b, D-76133 Karlsruhe, Germany (b) Institute of Biology for Engineers and Biotechnology of Waste Water Treatment, Karlsruhe Institute of Technology, Am Fasanengarten, D-76133 Karlsruhe, Germany (c) Department of Land and Water Resource Engineering, Royal Institute of Technology, Teknikringen 76, SE-100 44 Stockholm, Sweden (d) Department of Chemistry, University of Kalyani, Nadia 741235, West Bengal, India (e) Institute of Geography and Geoecology, Karlsruhe Institute of Technology, Reinhard-Baumeister-Platz 1, D-76133 Karlsruhe, Germany Article History: Received 7 December 2011; Revised 29 December 2012; Accepted 21 January 2013
    Keywords: Hydrogeology -- Electric Properties ; Aquifers -- Electric Properties ; Bacteria -- Electric Properties ; Groundwater -- Electric Properties ; Water Resources -- India ; Water Resources -- Electric Properties ; Arsenic -- Electric Properties
    ISSN: 0304-3894
    Source: Cengage Learning, Inc.
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  • 10
    Language: English
    In: PLoS ONE, 01 January 2011, Vol.6(11), p.e27615
    Description: Stenotrophomonas maltophilia is a highly versatile species with useful biotechnological potential but also with pathogenic properties. In light of possible differences in virulence characteristics, knowledge about genomic subgroups is therefore desirable. Two different genotyping methods, rep-PCR fingerprinting and partial gyrB gene sequencing were used to elucidate S. maltophilia intraspecies diversity. Rep-PCR fingerprinting revealed the presence of 12 large subgroups, while gyrB gene sequencing distinguished 10 subgroups. For 8 of them, the same strain composition was shown with both typing methods. A subset of 59 isolates representative for the gyrB groups was further investigated with regards to their pathogenic properties in a virulence model using Dictyostelium discoideum and Acanthamoeba castellanii as host organisms. A clear tendency towards accumulation of virulent strains could be observed for one group with A. castellanii and for two groups with D. discoideum. Several virulent strains did not cluster in any of the genetic groups, while other groups displayed no virulence properties at all. The amoeba pathogenicity model proved suitable in showing differences in S. maltophilia virulence. However, the model is still not sufficient to completely elucidate virulence as critical for a human host, since several strains involved in human infections did not show any virulence against amoeba.
    Keywords: Sciences (General)
    E-ISSN: 1932-6203
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