CHENTao,LIFeng,MAOWen-long,et al.Application Example of Tail Water from a Sewage Treatment Station by Constructed Wetland and Stabilization Pond System[J].China Water & Wastewater,2022,38(22):102-106.
Application Example of Tail Water from a Sewage Treatment Station by Constructed Wetland and Stabilization Pond System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第22期
Page:
102-106
Column:
Date of publication:
2022-11-17
- Keywords:
- domestic sewage; constructed wetland; horizontal subsurface flow wetland; cellulose carbon source; surface flow wetland; stabilization pond
- Abstract:
- In view of the gap between the discharge standards of sewage treatment stations and the assessment requirements of surface water, the constructed wetland and stabilization pond system was selected for advanced treatment of domestic sewage. Taking a sewage treatment station of a town in Henan Province as an example, aiming at the characteristics of tail water quality, a constructed wetland, which consists of primary denitrification horizontal subsurface flow wetland, secondary horizontal subsurface flow wetland and surface flow wetland, and stabilization pond system with a treatment capacity of 2 000 m3/d was designed. After the stable operation of the system, the effluent quality indexes of COD, NH3-N and TP were better than the level Ⅳ criteria in Environmental Quality Standards for Surface Water (GB 3838-2002), and the TN concentration was below 4.78 mg/L. Corn cob provided organic carbon source for denitrifying bacteria continuously, which significantly improved the nitrogen removal effect of wetland system. The abundant and stable biological community in wetland matrix bed ensured the operation effect of wetland system.
Last Update:
2022-11-17