LAOHong-biao,ZHOUJian,SUNTing-jun,et al.Upgrading of Aerated Grit Chamber for Near-zero Emission of Malodorous Gas Closed Cycle[J].China Water & Wastewater,2022,38(10):134-140.
Upgrading of Aerated Grit Chamber for Near-zero Emission of Malodorous Gas Closed Cycle
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第10期
Page:
134-140
Column:
Date of publication:
2022-05-17
- Abstract:
- The aeration grit chamber is one of the main sources of malodorous gas in wastewater reatment plant. The upgrading scheme for near-zero emission process of malodorous gas was proposed, including the combination of hydrogen sulfide removal by ferrate oxidation, biological deodorization and closed cycle of treated malodorous gas to aerated grit chamber. The commissioning result showed that the removal efficiencies of hydrogen sulfide and ammonia by ferric iron oxidation achieved 92%-95% and 40%-50%, respectively. The removal rates of hydrogen sulfide and ammonia by biological deodorization unit were both about 98% after commissioning and biofilm forming. On the basis of near-zero emission of malodorous gas in closed cycle, compared with conventional alkali absorption, the operation cost of chemicals can be saved greatly, and the air environment quality in wastewater treatment plant and surrounding area are further improved.
Last Update:
2022-05-17