Stable Operational Condition of Submerged Membrane Activated Sludge Process without Sludge Withdrawal

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Chandika Prasad Bhatta¹  Akira Matsuda¹  Yoshiaki Maehana¹  Kenji Kawasaki¹  Daisuke Omori²  Yuichi Noma¹  Mami Yamaguchi¹ 

[1] Department of Applied Chemistry, Ehime University;Environmental Facilities, Daiki Company

关键词: Wastewater Treatment;    Membrane Separation;    Activated Sludge Process;    No Sludge Withdrawal;    Stable Operational Condition;   

DOI  :  10.1252/jcej.36.1523

来源: Maruzen Company Ltd

【 摘 要 】

References(8)Cited-By(6)An equipment of a submerged membrane activated sludge process without sludge withdrawal was operated at three BOD loadings (0.25, 0.5 and 0.6 kg-BOD/(m3·d)) to find out its stable operational condition. The stabilized and final values of MLSS were increased with BOD loadings and the conversion ratios (0.04–0.15 kg-MLSS/kg-BOD) of substrate to biomass were much smaller than the conventional activated sludge process. The supernatant TOC in the bioreactor was low in all runs and then organic matters were not accumulated. At low BOD loadings (0.25, 0.5 kg-BOD/(m3·d)), suction pressure was constant or increased very slowly, but at the highest BOD loading (0.6 kg-BOD/(m3·d)) the pressure and total filtration resistance were increased abruptly and failed the operation rather soon. The good stable operational condition without sludge withdrawal was obtained at BOD loading below 0.5 kg-BOD/(m3·d).

【 授权许可】

Unknown