ZHOU Jia-zhong,SONG Ping-zhou,ZHANG Shuang,et al.Engineering Design of a New High-standard Wastewater Treatment Plant with Limited Footprint Area in North China[J].China Water & Wastewater,2021,37(12 12):76-82.
Engineering Design of a New High-standard Wastewater Treatment Plant with Limited Footprint Area in North China
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
12 12
Page:
76-82
Column:
Date of publication:
2021-06-17
- Keywords:
- MBBR; rectangular peripheral inflow and peripheral outflow secondary sedimentation tank; magnetic coagulation; Bardenpho; limited footprint area; low temperature
- Abstract:
- Design treatment capacity of a new wastewater treatment plant (WWTP) in north China is 3.0×104 m3/d. TN and SS in the effluent are required to be lower than 12 mg/L and 10 mg/L, respectively, and other indicators need to meet class Ⅳ limitations of Environmental Quality Standards for Surface Water (GB 3838-2002). The construction of the WWTP is faced with problems such as limited footprint area, high discharge standard and low temperature. A combined process of modified Bardenpho-MBBR, secondary sedimentation tank with rectangular peripheral inflow and peripheral outflow and magnetic coagulation precipitation was selected to realize compact layout of each process section. The actual operational results showed that all the indices of the effluent could stably meet the discharge standards. The Bardenpho-MBBR process improved the low temperature resistance of the system and achieved efficient nitrogen and phosphorus removal. Magnetic coagulation precipitation improved the ability of the advanced treatment system to resist SS impact and realized efficient and stable SS and TP removal. The WWTP covered an area of 0. 641 m2/(m3·d-1), and the direct operational cost was 0.512 yuan/m3. The combined process has the advantages of simple process, less footprint area and good effluent water quality, which is suitable for construction and operation of high-standard WWTPs, especially those with limited footprint area.
Last Update:
2021-06-17