YANG Deng,YUAN Min-zhong,ZHONG Yu,et al.Upgrading and Expansion without Shutdown of a WWTP in Chaozhou with A/O Oxidation Ditch Process[J].China Water & Wastewater,2020,36(20 20):119-123.
Upgrading and Expansion without Shutdown of a WWTP in Chaozhou with A/O Oxidation Ditch Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
20 20
Page:
119-123
Column:
Date of publication:
2020-10-17
- Keywords:
- non-shutdown reconstruction; biological aerated filter; denitrification deep bed filter; A/A/O-MBR
- Abstract:
- The original treatment capacity of a WWTP in Chaozhou is 10×104 m3/d, adopting A/O mechanical aeration oxidation ditch process, and the effluent standard is the first level B standard in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002). Under the condition of no new land usage and no production stopping, the standard of effluent should be raised to the stricter value between the first level A standard (GB 18918-2002)and the first level discharge standard in the second period of the local standard of Guangdong Province Discharge Limits of Water Pollutants(DB 44/26-2001), and the scale should be expanded to 15×104 m3/d. The advanced treatment process of biological aerated filter + denitrification deep bed filter was added on the basis of the original A/O mechanical aeration oxidation ditch in the upgrading project, and the A/A/O-MBR + UV disinfection process was adopted in the expansion project. The actual operation results showed that the operation of the project was good and the effluent quality was stable.
Last Update:
2020-10-17