Buried sewage treatment equipment

1、 Introduction to Buried Sewage Treatment Equipment

The buried sewage treatment equipment of Zhengzhou Parkway Technology Co., Ltd. adopts multi-stage purification, and realizes the purification and treatment of sewage through filtration, microbial decomposition, adsorption, absorption, precipitation, disinfection, etc. With strong pollution resistance, low noise, low energy consumption and stable operation, the equipment is commonly used for the purification of sewage produced by parks, residential areas, hospitals, commercial streets, shower centers, small and medium-sized factories, rural areas and towns. It is easy to use and has no impact on the surrounding environment.

2、 Performance characteristics of buried sewage treatment equipment

The equipment is buried under the ground and can be greened above it, so the environment is beautiful;

Generally, the whole equipment does not need to be managed by specially-assigned personnel;

The floor area can be reduced, and the parking lot can be built above the equipment, without the construction of plant and other facilities;

No impact on the surrounding environment, less sludge generation and noise less than the standard of Class II area;

Easy operation, new process, good effect and long service life;

The equipment can be arranged according to the standard or special arrangement according to the terrain.

3、 Operating principle of buried sewage treatment equipment

Anaerobic biological filter tank

1) Filtering function: the filler can intercept and filter large particles and suspended solids in the water;

2) Hydrolysis: Anaerobic microorganism can hydrolyze and transform insoluble substances of macromolecules into soluble substances of micromolecules;

3) Absorption: anaerobic microorganism absorbs and absorbs organic pollutants in water. One part is used for its own growth and reproduction, and the other part is discharged through U-shaped water seal in the form of biogas;

4) Denitrogenation: the effluent from the contact oxidation bed is returned to the anaerobic filter. The denitrifying bacteria in the anaerobic microorganism can utilize the nitrate nitrogen in the return water and convert it into nitrogen to remove the nitrogen substances in the sewage.

The concentration of suspended solids, organic pollutants and nitrogen is reduced after the treatment of rural sewage in anaerobic filter, which also reduces the load of subsequent contact oxidation bed.

Contact oxidation bed

1) Adsorption: Aerobic microorganism forms a biological membrane with large surface area and high concentration during the growth and reproduction process on the filler, which can absorb most organic pollutants in the water and reduce the concentration of pollutants;

2) Ingestion and decomposition: under the condition of continuous air supply to the reactor, the aerobic microorganism can take the adsorbed organic pollutants as nutrients for metabolism, one for its own growth and reproduction, and the other for carbon dioxide and water.

The contact oxidation bed further reduces the concentration of organic pollutants in rural sewage, and the removal rate of effluent CODcr and BOD5 reaches over 80%, which can reach the national sewage discharge level II standard.

Sedimentation tank

1) Under the action of gravity, the suspended sludge with the specific gravity larger than water in the outlet water of contact oxidation bed sinks to the tank bottom, so as to remove it from the water and ensure good outlet water quality;

2) Sludge settled to the bottom is automatically returned to the contact oxidation bed to maintain sludge concentration in the contact oxidation bed.

Disinfection tank

Solid chlorine is used to disinfect the effluent, which can effectively kill pathogenic microorganism such as bacteria, coliform and virus in the water. The treated water is clear and transparent without odor, and the number of bacteria and coliform can meet the national sewage discharge standard.

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