某国外污水处理厂污泥厌氧消化池工艺设计

Process Design of Sludge Anaerobic Digester for Foreign WWTP

摘要:

“一带一路”沿线某南亚内陆国家排水基础设施落后，基本处于停滞状态，随着城市发展及人口的不断增长，城市水污染问题日益突显，为了缓解日益严峻的水污染现状，亚洲开发银行在加德满都谷地援建三座污水处理厂，处理出水排入当地河流，为了减少二次污染，设计采用污泥消化产沼气，沼气用于锅炉供热及发电，实现对污泥的减量化和资源化利用，消化段工艺设计是污泥资源化利用的关键节点。以D污水厂为例，对消化池的工艺设计进行探讨。

Abstract:

A south Asian inland country along the "Belt and Road Initiative" has the poor drainage infrastructure, which is basically at a standstill. With the development of cities and the continuous growth of population, the problem of urban water pollution becomes increasingly prominent. To alleviate the increasingly serious water pollution status, the ADB assists the construction of three WWTPs in Kathmandu valley. The treated water is discharged into the local rivers. In order to reduce the secondary pollution, the sludge digestion is used in the design to produce the marsh gas, and the marsh gas is used for the boiler heating and power generation, which achieves the reduction and recycling use of sludge. The process design of digestion period is the key of sludge recycle. Taking D WWTP as an example, the process design of digester is discussed.