MOWen-ting,YANGTao,GUOJun.Upgrading Scheme and Project Design of a WWTP for Quasi-level Ⅲ Surface Water Criteria[J].China Water & Wastewater,2022,38(20):90-95.
Upgrading Scheme and Project Design of a WWTP for Quasi-level Ⅲ Surface Water Criteria
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第20期
Page:
90-95
Column:
Date of publication:
2022-10-17
- Keywords:
- upgrading and reconstruction; denitrification deep-bed filter; three-step ozone catalytic oxidation; dissolved air flotation
- Abstract:
- The current effluent quality of a wastewater treatment plant (WWTP) in Wuhan implements with first level A discharge standard, which will be promoted to quasi-level Ⅲ criteria of surface water (TN≤6 mg/L) in its upgrading and reconstruction project. Based on the analysis of current treatment effect, further removal of TN, COD and TP is regarded as the difficulty of the project and the correspondingly special advanced treatment process shall be supplemented. According to the results of the mechanism analysis for pollutants removal and the pilot study, denitrification deep-bed filter, three-step ozone catalytic oxidation and dissolved air flotation are selected for the further removal of TN, COD and TP, respectively. Besides, the flocculant dosage and reflux ratio of dissolved air flotation, the mass ratio of O3 consumption to COD removal and loading height of catalyst bed in ozone catalytic oxidation are determined based on the results of pilot study.
Last Update:
2022-10-17