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RESEARCH PRODUCT

Two-stage anaerobic digestion of tomato, cucumber, common reed and grass silage in leach-bed reactors and upflow anaerobic sludge blanket reactors

Padma Shanthi JagadabhiPrasad KaparajuJukka Rintala

subject

Environmental EngineeringSilageBioengineeringBiologyPoaceaeLigninBacteria AnaerobicBioreactorsSolanum lycopersicumBiogasLeachateLeaching (agriculture)Waste Management and DisposalKjeldahl methodta218Biological Oxygen Demand AnalysisSilageRenewable Energy Sustainability and the EnvironmentGeneral MedicinePulp and paper industryRefuse DisposalWaste treatmentAnaerobic digestionAgronomyBiofuelCucumis sativusMethane

description

Abstract Anaerobic digestion of tomato, cucumber, common reed and grass silage was studied in four separate two-stage reactor configuration consisting of leach bed reactor (LBR) and upflow anaerobic sludge blanket reactor (UASB). LBR studies showed that COD solubilization for cucumber and grass silage was higher (50%) than tomato (35%) and common reed (15%). Results also showed that 31–39% of initial TKN present in tomato and cucumber was solubilized in the leachates and 47–54% of the solubilized TKN was converted to NH4-N. The corresponding values for common reed and grass silage were 38–50% and 18–36%, respectively. Biomethanation of the leachates in UASB reactors resulted in methane yields of 0.03–0.14 m3 CH4 kg−1VSfed for the studied crop materials. Thus, high COD solubilization, high nitrogen mineralization and solubilization rates were feasible during anaerobic digestion of lignocellulosic materials in a two-stage LBR–UASB reactor system.

yearjournalcountryeditionlanguage
2010-09-07Bioresource Technology
10.1016/j.biortech.2011.01.052https://doi.org/10.1016/j.biortech.2011.01.052