SHENHao,YANGZhong-qi,WANGFan,et al.Application of MBBR and Magnetic Coagulation Precipitation Process in Retrofitting of a WWTP with Limited Construction Land[J].China Water & Wastewater,2023,39(8):112-119.
Application of MBBR and Magnetic Coagulation Precipitation Process in Retrofitting of a WWTP with Limited Construction Land
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第8期
Page:
112-119
Column:
Date of publication:
2023-04-17
- Keywords:
- MBBR; magnetic coagulation precipitation process; upgrading and retrofitting; nitrogen and phosphorus removal
- Abstract:
- A wastewater treatment plant (WWTP) in Guangdong Province with capacity of 12×104 m3/d, is required to meet the stricter values of first level criteria in the second period of Guangdong Province local Discharge Limits of Water Pollutants (DB 44/26-2001) and of first level A criteria in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The retrofitting of the WWTP was facing the problem of limited land occupation. The MBBR and magnetic coagulation precipitation process is selected to retrofit the original A2/O process in close combination with the current process facilities. The biochemical tank is embedded with MBBR process in?situ without the need for new construction. In order to ensure the efficient and stable removal of SS and TP, magnetic coagulation precipitation process is adopted in advanced treatment unit to construct with minimal land occupation. After retrofitting, the effluent COD is (15.95±4.16) mg/L, BOD5 is (4.97±1.40) mg/L, SS is (7.10±1.68) mg/L, TN is (10.29±2.59) mg/L, TP is (0.17±0.11) mg/L and NH3-N is (1.24±1.17) mg/L, which are stable and superior to the design effluent standard. The practice shows that the MBBR and magnetic coagulation precipitation process is simple, intensive, stable and efficient, which is applicable to the retrofitting, expansion or new construction of WWTP with limited land occupation.
Last Update:
2023-04-17