LIU Qiang.Application of Pre-anoxic Tank/CAST/Magnetic Coagulation Process in Upgrading of a Compact Wastewater Treatment Plant[J].China Water & Wastewater,2021,37(24 24):69-73.
Application of Pre-anoxic Tank/CAST/Magnetic Coagulation Process in Upgrading of a Compact Wastewater Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
24 24
Page:
69-73
Column:
Date of publication:
2021-12-17
- Abstract:
- The design scale of a wastewater treatment plant upgrading and reconstruction project in Dalian is 9×104 m3/d, and the discharge standard was upgraded from first class B criteria to A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The original biochemical treatment process was CAST, which had the problems of insufficient CAST tank volume, no advanced treatment system, insufficient carbon/nitrogen ratio of the influent and lack of carbon source adding system, etc. To solve these problems, the process of pre-anoxic tank, CAST and magnetic coagulation sedimentation was selected in the upgrading and reconstruction project. As there was no space available, many original buildings (structures) were demolished, transformed or rebuilt, some irregular treatment structures were designed, and new structures were built together and stacked. After reconstruction, the operation of the pre-anoxic tank and magnetic coagulation sedimentation tank is good, and effluent quality is stable and better than first class A discharge standard.
Last Update:
2021-12-17