The underground integrated sewage treatment equipment is a modular sewage biological treatment equipment and a sewage biological treatment system with biofilm as the main purification body. It gives full play to the characteristics of biofilm reactors such as anaerobic biological filters and contact oxidation beds, which have high biological density, strong pollution resistance, low power consumption, stable operation and convenient maintenance, making this system have broad application prospects and promotion value.

       The underground integrated sewage treatment equipment is mainly designed to treat domestic sewage and similar industrial organic sewage. The main treatment method is the relatively mature biochemical treatment process——biological contact oxidation method. The water quality parameters are calculated according to the general domestic sewage water quality design, according toBOD5average200mg/1, and the effluentBOD5is designed according to20mg/1. It consists of six parts: (1) primary sedimentation tank; (2) contact oxidation tank; (3) secondary sedimentation tank; (4) disinfection tank and disinfection device; (5) sludge tank; (6) fan room and fan.

       Underground integrated sewage treatment equipment is suitable for domestic sewage treatment and similar industrial sewage treatment in residential areas, restaurants, hotels, mines, factories, slaughterhouses, etc. It greatly delays the urgent demand for water resources for economic development and becomes one of the ways to solve the shortage of water resources.
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