title: Biogas and biohydrogen production potential of high strength automobile industry wastewater during anaerobic degradation.
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 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.
authors.affiliation: Institute of Biology for Engineers and Biotechnology of Wastewater, Am Fasanengarten, Karlsruhe Institute of Technology, 76133 Karlsruhe, Germany. mini.bajaj@kit.edu
authors.forename: Mini
authors.initials: M
authors.lastname: Bajaj
authors.forename: Josef
authors.initials: J
authors.lastname: Winter
mesh_terms: D000693:Anaerobiosis / Q000187:drug effects; D001336:Automobiles; D001673:Biodegradation, Environmental; D056804:Biofuels; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology; D005947:Glucose / Q000378:metabolism; D006859:Hydrogen / Q000378:metabolism*; D007220:Industrial Waste; D008697:Methane / Q000096:biosynthesis*; D012722:Sewage; D014865:Waste Disposal, Fluid / Q000295:instrumentation / Q000379:methods*; D062065:Wastewater / Q000032:analysis; D015032:Zinc / Q000494:pharmacology
chemical_list: D056804:Biofuels; D005947:Glucose; D006859:Hydrogen; D007220:Industrial Waste; D008697:Methane; D012722:Sewage; D062065:Wastewater; D015032:Zinc
keywords: Aerobic sludge; Anaerobic fermentation; Auto-industry wastewater; Co-substrate; High COD; Zinc inhibition