Underground sewage treatment equipment is a modular sewage biological treatment device,which is a sewage biological treatment system with biofilm as the main purification body.It fully utilizes the characteristics of biofilm reactors such as anaerobic biofilters and contact oxidation beds,such as high biological density,strong pollution resistance,low power consumption,stable operation,and easy maintenance.

　　Equipment advantages

　　1.Usually buried underground,the surface above the equipment can be used for greening or other purposes,without the need for building houses,heating,or insulation.

　　2.The secondary biological contact oxidation treatment process commonly uses push flow biological contact oxidation,which has a better treatment effect than mixed or two-stage series mixed biological contact oxidation tanks.And it has a smaller volume than activated sludge tanks,strong adaptability to water quality,good shock load resistance,stable effluent quality,and will not cause sludge expansion.

　　3.The biochemical tank adopts the biological contact oxidation method,which has a relatively low volume load of the filling material,and the microorganisms are in their own oxidation stage,resulting in low sludge production.It only takes more than three months(90 days)to discharge the sludge(using fecal trucks to suction or dehydrate into sludge cakes for external transportation).

　　4.The buried domestic sewage treatment equipment is equipped with soil deodorization measures in addition to conventional high-altitude exhaust.

　　5.The entire equipment processing system is equipped with a fully automatic electrical control system and equipment fault alarm system,which operates reliably and generally does not require dedicated management.Only timely maintenance and upkeep of the equipment are needed.