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KMID : 1024519960050040513
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Journal of the Environmental Sciences
1996 Volume.5 No. 4 p.513 ~ p.524
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Mixing effect on organic removal efficiency in treating low-strength wastewater using a modified anaerobic filter reactor
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Jeong Byung-Gon
Lee Heon-Mo
Youn Jong-Ho
Chung Hyung-Sook
Yang Byung-Soo
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Abstract
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Laboratory investigation was conducted to evaluat the mixing effects on organic removal efficiency to treat low-strength synthetic wastewater using modified anaerobic - filter reactor combining anaerobic filter and upflow anaerobic sludge blanket. Using the modified process the low-strength wastewater like municipal sewage could be treated with 85% T-COD removal efficiency at hydraulic retention time of 6 hours. At the constant organic loading of 0.5 kg COD/m 3-day, the organic removal efficiency and effluent COD concentration are increased as influent COD concentration increased from 125 mg/l to 500 mg/l. Mixing effects on organic removal efficiency are evident and optimum mixing speed is found as 50RPM. Placing the granular sludge and media on which slime layer was pre-formed into the reactor seemed to be very effective In achieving short start-up period. Therefore, the steady state was achived after 4 weeks and 1 week based on T-COD and S-COD, respectively.
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KEYWORD
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mixing effects, upflow anaerobic sludge blanket, granular sludge
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