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- W2355394014 abstract "The nitrogen and phosphorus removal performance of a step-feed modified A2/O process at less than 11. 5 ℃ was investigated by using municipal sewage. The raw sewage flowed into an anaerobic tank and an anoxic tank separately according to the proportion of 1 ∶ 1 to distribute carbon source reasonably. The effluents from the anaerobic and anoxic tanks entered an aerobic tank. Under the controlled conditions: HRT 14 to 8 h,SRT 15 d,MLSS 3 000 to 4 000 mg /L,DO 2 mg /L,sludge reflux ratio75%,and nitrification liquid return ratio 200%,the effects of different sludge loadings were studied,which were 0. 22,0. 31 and 0. 39 kgCOD /( kgMLSS·d) respectively. The removal efficiency of COD decreased with the increasing of sludge loading and the average removal efficiency reduced from 87. 2%to 80. 7%. The effluent COD met the first level B national discharge standard. The nitrogen removal was heavily affected by low temperature but slightly affected by change in sludge loading. The nitrification /denitrification was weakened with temperature drop and the increasing of sludge loading,and the accumulation of nitrite nitrogen occurred in the system. Also,denitrifying phosphorus removal occurred in the anoxic tank. At low temperature and high sludge loading,the filamentous sludge bulking occurred in the aerobic tank." @default.
- W2355394014 created "2016-06-24" @default.
- W2355394014 creator A5046675191 @default.
- W2355394014 date "2014-01-01" @default.
- W2355394014 modified "2023-09-26" @default.
- W2355394014 title "Operation of Modified A~2/O Process at Low Temperature and Different Sludge Loadings" @default.
- W2355394014 hasPublicationYear "2014" @default.
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