两级SBR工艺处理小城镇生活污水研究

REASEACH ON TREATMENT OF SMALL TOWN WASTE WATER BY TWO-STAGE SBR PROCESS

采用两级 SBR (sequence batch reactor)工艺处理小城镇生活污水 ,试验结果表明 ,先通过 SBR1反应器对污水起到了平衡、均化作用 ,再通过 SBR2反应器实现了污水的脱氮除磷 .试验出水 ρCOD(铬法 )浓度为 2 1～ 43 mg· L-1,去除率达到 85 %～ 93 % ;出水ρ(N) (N为氨态氮 )为 3 .3～ 9.5 mg· L-1,去除率达到 65 %～ 81 % ;出水ρt(P)为 0 .3 2～ 0 .63 mg· L-1,去除率达到 87%～ 95 % .

This paper studies the treatment of small towns waste water by two-stage sequence batch reactor (SBR) process, the waste water is balanced and equaled through SBR1 and the nitrogen and phosphorus of it are removed by SBR2. The effluent constants ρ _ COD , ρ (N), and ρ _t(P) are successively in the range of 21～43 mg·L -1 , 3.3～9.5 mg·L -1 , and 0.32～0.63 mg·L -1 , the removal rate of ρ _ COD , ρ (N), and ρ _t(P) are 85%～93%, 65%～81% and 87%～95% respectively.