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Simultaneous H2 Production and Treatment of Starch Wastewater in a Combined Up-Flow Anaerobic Staged Reactor Followed by Down-Flow Hanging Sponge System

Simultaneous H2 Production and Treatment of Starch Wastewate...

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2012 International Conference on Environment,Chemistry and Biology

作者： Mahmoud Nasr Ahmed Tawfik shinichi ookawara Masaaki Suzuki Egypt-Japan University of Science and Technology (E-JUST) School of Energy Resources and Environmental Engineering P.O. Box 179-New Borg El Arab City-Postal Code 21934-Alexandria-Egypt National Research Center Water Pollution Research Department El-Tahrir St.P.Box 12622 Dokki Cairo Egypt Tokyo Institute of Technology.2-12-1 O-okayamaMeguro-kuTokyo 152-8552Japan

This study was carred out to investigate the efficiency of up-flow anaerobic staged reactor (UASR) for hydrogen production from starch wastewater industry. The reactor was continously operated at pH value of 6.86 ±0.5, temperature of 32 °C and organic loading rate (OLR) of 4.6 gCOD/l.d. Results revealed that, the reactor achieved an average hydrogen production of 6.0 lH2/d, corresponding to 0.35 mol H2/mol glucose. Furthermore, the drop of influent pH values from 6.86 ±0.5 to 5.65 ±0.76 during the UASR was associated by increase in VFAs from 46 ±27 to 160 ±58 mg/l respectively. The effluent quality of UASR is not complying for discharge into sewaerage network. Therfore, post-treatment is needed. Down flow hanging sponge (DHS) system for treatment of UASR effluent was operated at an HRT of 1.5 h and OLR of 10 gCOD/l.d. The reactor in combination with UASR as a pretreatment achieved an overall removal efficiency of 83%. Moreover, pH value was adapted in DHS from 5.65 ±0.76 to a value of 6.54 ±0.48. Also, the results obtained for the UASR profile showed that 50 % of TVFAs and 87% of MLSS were accumulated at the reactor bottom at a level of 10%.

关键词： Starch Wastewater Up-flow Anaerobic Staged Reactor Hydrogen Yield Down-flow Hanging Sponge Carbohydrate COD

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