ZHANG Li,YU Guo-fu,QU Lu,et al.Analysis on the Operation Effect of a WWTP Upgrading Project for the Firstlevel A Standard in Chongqing[J].China Water & Wastewater,2020,36(18 18):95-98.
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Analysis on the Operation Effect of a WWTP Upgrading Project for the Firstlevel A Standard in Chongqing

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第36卷 Number: 18 18 Page: 95-98 Column: Date of publication: 2020-09-17
Author(s):
ZHANG Li1; YU Guo-fu1; QU Lu2; CHUN Yu-tong1
(1. Chongqing Water Group Co. Ltd., Chongqing 400015, China; 2. Central and Southern China Municipal Engineering Design & Research Institute Co. Ltd., Wuhan 430010, China)
Keywords:
wastewater treatment plant; upgrading and reconstruction; improved A-A2/O; highefficiency sedimentation tank; filter
Abstract:
The combined process of improved A-A2/O, highefficiency 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.
Last Update: 2020-09-17