WANG Tuo,YAN Bing.Application of Multi-stage A/O Process Collaborative Precise Control System in Wastewater Treatment Plant with Low C/N Influent[J].China Water & Wastewater,2021,37(12 12):65-69.
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Application of Multi-stage A/O Process Collaborative Precise Control System in Wastewater Treatment Plant with Low C/N Influent

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 12 12 Page: 65-69 Column: Date of publication: 2021-06-17
Author(s):
WANG Tuo1; 2; YAN Bing3
(1. Tianjin Municipal Engineering Design & Research Institute Co. Ltd., Tianjin 300392， China; 2. Tianjin Enterprise Key Laboratory of Infrastructure Durability, Tianjin 300392， China; 3.Tianjin University Research Institute of Architectural Design and Urban Planning Co. Ltd., Tianjin 300073， China)
Keywords:
biological nitrogen removal; multi-stage A/O; low C/N
Abstract:
The total treatment capacity of a municipal wastewater treatment plant after overall relocation is 25×104 m3/d. The process is designed to be “pretreatment (including primary sedimentation tank), multistage A/O biological tank, radial flow secondary sedimentation tank, high-efficiency clarifier tank, V-shaped filter, ozone catalytic oxidation and sodium hypochlorite disinfection”, and the effluent quality was required to meet quasi-Ⅳ surface water standards. In view of low BOD5 and high TN of the influent quality, the step-feed multi-stage A/O tank was designed as the core process of the secondary treatment, which could make full use of BOD5 in the raw water and reduce the demand for external carbon source as far as possible. The intelligent operation of the wastewater treatment plant was realized by adopting the collaborative precise aeration system and the precise carbon source adding system, which further reduced the operational cost. Compared with the original sewage treatment plant, the direct operational cost can be reduced by about 0.39 yuan/m3 after relocation.
Last Update: 2021-06-17