ZHANG Li,YU Guo-fu,QU Lu,et al.Analysis on the Operation Effect of a WWTP Upgrading Project for the Firstlevel A Standard in Chongqing[J].China Water & Wastewater,2020,36(18):95-98.
重慶市某污水處理廠一級A提標改造運行效果分析
- Title:
- Analysis on the Operation Effect of a WWTP Upgrading Project for the Firstlevel A Standard in Chongqing
- 關(guān)鍵詞:
- 污水處理廠; 提標改造; 改良A-A2/O工藝; 高效沉淀池; 濾池
- Keywords:
- wastewater treatment plant; upgrading and reconstruction; improved A-A2/O; highefficiency sedimentation tank; filter
摘要:
重慶市某污水處理廠原采用A-A2/O為主體的二級處理工藝，此次提標采用改良A-A2/O+高效沉淀池+均質(zhì)濾料濾池工藝，通過對二級生物處理單元進行擴容、增加深度處理單元等方式，有效去除TN、TP、SS，目前出水水質(zhì)穩(wěn)定達到一級A標準。針對該污水處理廠常年進水水質(zhì)指標（如BOD5、COD、SS、TN等）高于一般城市生活污水的情況，分析了BOD5、COD、SS、TN等污染物指標去除率較高的原因，如提高生物池污泥濃度去除BOD5及COD等；針對提標后運行存在的斜管沉淀池季節(jié)性藻類及浮渣問題，也提出了改進建議。
- Abstract:
- The combined process of improved A-A2/O, highefficiency sedimentation tank, and homogeneous filter was adopted to replace the original secondary treatment process of A-A2/O in a wastewater treatment plant(WWTP) in Chongqing. The secondary biological treatment capability was expanded and advanced treatment units were added to effectively remove TN, TP and SS. At present, the effluent quality has reached the first-level A standard. In view of the fact that the influent BOD5, COD, SS, TN, and etc. of the WWTP are higher than those of ordinary urban domestic sewage, the possible reasons for higher removal rates of BOD5, COD, SS, TN are analyzed, such as increasing sludge concentration in the biological tank. Suggestions are also put forward to solve the problem of seasonal algae and scum in the inclined tube sedimentation tank after upgrading.
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