Application of CASS in Treating Domestic Sewage at Low Temperatures

The feasibility of using CASS technique for treating domestic sewage at low temperatures was investigated. The results indicate that for domestic sewage (averagely, ρ(BOD5)=295.7 mg/L; ρ(CODCr )= 811.7 mg/L; ρ(SS)= 119.6 mg/L), the removal rates are 95.3%, 85.7%, 91%, respectively. The CASS technique is operable in a wide range of temperature (about -5～20 ℃), but φ(S) and ρ(S) values are higher at low temperature than those at normal temperature. A low temperature is good for oxygen transmission and the cyclic fluctuation of DO (dissolved oxygen) is benefit for the removal of P and N, preventing the sludge from bulking.

作 者： 何緒文 桑義敏 王守中 吳兵   作者單位： Department of Chemical and Environmental Engineering, CUMT, Beijing, 100083, P.R.China  刊 名： 中國礦業(yè)大學(xué)學(xué)報(bào)(英文版)  ISTIC EI 英文刊名： JOURNAL OF CHINA UNIVERSITY OF MINING AND TECHNOLOGY  年，卷(期)： 2001 11(2)  分類號： X5  關(guān)鍵詞： CASS   domestic sewage treatment   active sludge   life form  

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