QIAOHai-bing,ZHAOZhi-tai,LIShuai-jun,et al.Design of Oxidation Ditch Upgraded to A2O, MBBR and O3 Process in a Wastewater Treatment Plant[J].China Water & Wastewater,2023,39(22):60-65.
Design of Oxidation Ditch Upgraded to A2O, MBBR and O3 Process in a Wastewater Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第22期
Page:
60-65
Column:
Date of publication:
2023-11-17
- Keywords:
- the Yellow River basin; combined oxidation ditch; upgrading and reconstruction; MBBR; ozone
- Abstract:
- The process of a wastewater treatment plant with scale of 4×104 m3/d in the Yellow River basin of Henan Province was combined oxidation ditch. The main pollutant indexes in the effluent of the upgrading project are required to meet the class Ⅳ limit specified in the surface water standard and the first level limit specified in Discharge Standard of Water Pollutants in Henan Province Located in the Yellow River Basin (DB 41/2087-2021). The influent is mainly industrial wastewater, and the water quality is characterized by large fluctuation and high concentration. The upgrading project built a new anaerobic tank, transformed the oxidation ditch into A2O and MBBR tank, and added an ozone oxidation advanced treatment process based on comprehensive consideration of the factors such as land conditions, water cut-off period, hydraulic elevation, fire requirements, construction impact and energy saving and consumption reduction, and the effluent quality met the requirements specified in the discharge standard after the transformation. The design reinforced the biological tank with a perforated structure on the wall, considered the effective filtration of the air from the suspension fan room, and improved the uniformity of water distribution in the sedimentation area of the high efficiency sedimentation tank.
Last Update:
2023-11-17