WANGJian-li,CHENLin,WEIShou-ting,et al.Upgrading of Orbal Oxidation Ditch Based on Typical Southern China Wastewater Characteristics[J].China Water & Wastewater,2022,38(16):96-100.
Upgrading of Orbal Oxidation Ditch Based on Typical Southern China Wastewater Characteristics
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第16期
Page:
96-100
Column:
Date of publication:
2022-08-17
- Keywords:
- Orbal oxidation ditch; SND; upgrading and reconstruction
- Abstract:
- The design capacity of a wastewater treatment plant phase Ⅰ project in southern China is 4×104 m3/d. The Orbal oxidation ditch process is adopted, which has the problems of high operation energy consumption, high chemical consumption and low effluent standard. By comparing the same type of oxidation ditch processes abroad, this paper analyses the mechanism of simultaneous nitrification and denitrification (SND) in Orbal oxidation ditch and the reason causing inefficient simultaneous nitrification and denitrification of water quality in southern China. The transformation scheme of changing surface mechanical aeration into bottom microporous aeration is put forward. The operation cost after reconstruction is greatly reduced, the annual production cost is saved by 2.676 8 million yuan, and the payback period of reconstruction investment is 1.72 years, which provides a reference for the upgrading of similar WWTPs in China.
Last Update:
2022-08-17