Environmental and Economic Aspects of Hydrogen and Methane Production from Starch Wastewater Industry
作者： Mahmoud NASR , Ahmed TAWFIK , Shinichi OOKAWARA , Masaaki SUZUKI
关键词: Methane 、 Acidogenesis 、 Starch 、 Environmental engineering 、 Environmental science 、 Pulp and paper industry 、 Bioreactor 、 Sewage treatment 、 Wastewater 、 Hydraulic retention time 、 Methanogenesis
摘要: Feasibility study of an up-flow staged sludge bed (USSB) for treatment starch wastewater industry was investigated. The bioreactor examined under both acidogenesis and methanogenesis conditions hydrogen methane production, respectively. acidogenic reactor operated at a hydraulic retention time (HRT) 8 h organic loading rate (OLR) 60.0 ± 6.6 kg-COD/(m·d). Hydrogen yield 312.5 26.2 L-H2/kg-COD-removed representing 22.5% the theoretical value. At longer HRT 24 OLR 20.0 2.2 kg-COD/(m·d), 41.0 3.6% total influent COD converted to methane, amounted 240.0 18.1 L-CH4/kg-COD-removed which represented 68% These results were used estimate cost economic analysis full scale plant treating 300 m/d. Environmental benefits provided additional profits enhance cash-flow analysis. revealed that, would return its investment in payback period 1.9 0.1 1.8 years, with energy profit 22 11.23 US$/GJ terms
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