摘要
某全地埋污水处理厂设计规模为5万m3/d,近期按2.5万m3/d实施.根据进出水水质和用地情况,污水处理采用改良AAO+MBR工艺,出水达到"准Ⅳ类"标准后用于周边绿地浇灌、道路冲洗和景观河道补水.污泥经浓缩脱水后达到80％含水率后,送到城市污泥处置中心进行进一步处置.通过详细介绍某全地埋污水处理厂的总体工艺设计路线,并对建设型式、处理工艺、雨季抗冲击负荷、防洪、防淹、消防防火分区的划分、除臭系统设计等重难点问题进行思考总结,为其他类似污水处理厂项目的建设提供借鉴.
Abstract
The design scale of a full underground buried wastewater treatment plant(WWTP)is 50 000 m3/d,and its short-term scale is implemented according to 25 000 m3/d.Based on the influent and effluent qualities and land conditions,the modified AAO+MBR process is adopted for the sewage treatment.The quality of effluent reaches the standard of"Quasi Class Ⅳ",and then is used for the irrigation of surrounding green land,flushing of roads and water replenishing of landscape rivers.After thickened and dewatered to 80％moisture content,the sludge is sent to an urban sludge disposal center for further disposal.The overall process design route of a full underground buried WWTP is introduced in detail,and some important points and difficulties in the design such as construction type,treatment process,impact resistance load during rainy season,flood control,waterlogging prevention,division of fire protection zones and deodorization system are thought and summarized,which provide the reference for the construction of the other similar WWTP projects.
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