SONG Tian-yi.A Case of Johannesburg（JHB） Process in a Wastewater Treatment Plant[J].China Water & Wastewater,2021,37(24 24):74-77.
A Case of Johannesburg（JHB） Process in a Wastewater Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
24 24
Page:
74-77
Column:
Date of publication:
2021-12-17
- Abstract:
- The design scale of the phase Ⅱ expansion project of Mengzhou wastewater treatment plant in Henan Province is 2.5×104 m3/d. The Johannesburg process (JHB), which is one of the modified AAO process, is adopted in the biochemical treatment unit. When the sludge from the secondary sedimentation tank is returned to the pre-anoxic tank, the high-quality carbon source in the influent can be preferentially used for denitrification, and the influence of nitrate on phosphorus release in the anaerobic section in the traditional AAO process can be alleviated. The measures such as design of multi-point water distribution, increasing the reaction time of the anoxic tank, increasing the nitrification liquid reflux ratio, adding external carbon source were adopted to enhance the phosphorus and nitrogen removal efficiency. The phosphorus and nitrogen removal performance of the phase Ⅱ expansion project was better than that of the phase Ⅰ project, and the effluent quality was obviously better than that of the oxidation ditch process of the phase Ⅰ project. The advanced treatment system adopts the mechanical coagulation, inclined plate precipitation and fiber rotary filter processes, and the treatment performance is good. The effluent indicators all stably meet the requirements of the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002).
Last Update:
2021-12-17