LI Yin-bo,WANG Guang-hua,ZHOU Jian-hua.Application of Modified AAO Process and Double-deck Sedimentation Tank in a Semi-buried Sewage Treatment Plant[J].China Water & Wastewater,2021,37(22 22):54-58.
Application of Modified AAO Process and Double-deck Sedimentation Tank in a Semi-buried Sewage Treatment Plant
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
22 22
Page:
54-58
Column:
Date of publication:
2021-11-17
- Abstract:
- To save footprint area of a sewage treatment plant migration project in downtown Wenzhou, the intensive semi-buried scheme is designed and applied in the project. The sewage treatment process consists of aerated grit chamber, modified AAO, double-deck sedimentation tank, high-efficient sedimentation tank, cloth media filter and ultraviolet disinfection, and the effluent quality reaches the first level A discharge standard. The treatment capacity and footprint area of the sewage treatment plant are 40×104 m3/d and 66 372 m2, respectively. The intensive design, such as double-deck horizontal sedimentation tank and co-wall and channel connection of the structures, is adopted in the project. The land use index is only 0.166 m2/(m3·d-1) and is far lower than that of the conventional sewage treatment plant. The construction cost of the project is 626 million yuan, the total investment is 681 million yuan, and the cost per ton of water is only 1 700 yuan. The construction cost is far lower than that of the underground sewage treatment plant, even lower than that of the ground sewage treatment plant.
Last Update:
2021-11-17