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Product features

Underground sewage treatment equipment can be buried below the surface, which can be used as green or square land. Therefore, this equipment does not occupy surface area, does not require building houses, and does not require heating and insulation.

The underground sewage treatment equipment consists of a secondary pool, with the first level being a reinforced concrete structure with a larger burial depth, and the other group being a steel structure with a shallower burial depth. The steel structure pool adopts an interpenetrating network anti-corrosion coating for corrosion prevention. It is a polymer formed by the interpenetrating network of rubber and plastic networks. It can withstand acid, alkali, salt, gasoline, kerosene, aging, impact wear, corrosion and rust prevention. After applying this coating, the anti-corrosion life of the equipment can generally reach more than 12 years.

The AO biological treatment process in buried sewage treatment equipment adopts a push flow biological contact oxidation tank, which has a better treatment effect than mixed or two-stage or three-stage series mixed biological contact oxidation tanks. And it has a smaller volume than activated sludge tanks, strong adaptability to water quality, good impact resistance, stable effluent quality, and will not cause sludge bulking. At the same time, a new type of elastic three-dimensional filler was used in the biological contact oxidation tank, which has a large actual surface area, convenient microbial biofilm hanging and removal, and higher removal rate of organic matter than other fillers under the same organic load conditions. It can improve the solubility of oxygen in air in water.

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Due to the use of a biological contact oxidation tank in the AO biological treatment process, the volume load of the filler is relatively low, and the microorganisms are in the self oxidation stage, resulting in a lower sludge production. In addition, the moisture content of the sludge produced by the biological contact oxidation tank is much lower than that of the sludge produced by the activated sludge tank. Therefore, the amount of sludge generated by buried sewage treatment equipment is relatively small, and generally only needs to be discharged once every 90 days.

In addition to using conventional blower noise reduction measures (such as vibration isolation pads, silencers, etc.), the buried sewage treatment equipment also has a new type of sound-absorbing material installed on the inner wall of the blower room, which reduces the noise level during operation to less than 50 decibels and reduces the impact on the surrounding environment.

The buried sewage treatment equipment is equipped with soil deodorization facilities. It uses the upper space of the reinforced concrete structure pool to set up soil improvement and gas distribution pipes. When the odor components dissolve in the water content of the soil through the soil layer, they are then transferred to the soil due to the surface adsorption and chemical reactions of the soil, and are decomposed by the microorganisms inside to achieve the purpose of deodorization.

The buried sewage treatment equipment is equipped with a fully automatic electrical control system and equipment damage alarm system, which has good reliability. Therefore, there is generally no need for dedicated personnel to manage it in daily life, only monthly or quarterly maintenance and upkeep are required.