the Buried sewage treatment equipment

I. Summery

With the increase of the economy and population, the human beings have paid more attention on the pollution of nature. On the basis of summarizing the operation of the sewage device and combined with our scientific research achievement and the artificial practice of our company, a set of treatment device for organic waste water has been designed and it has the sewage treatment device adopted the domestic advanced process and production manufacturing technology at the late period of 90s with the fiber glass and stainless steel as the main materials. The purpose is to make the domestic sewage and industrial waste water reach the requirements of the user discharge or recycle by means of the equipment. The equipment is mainly applied to the residence community (including the villa community), senior hotel, hospital, comprehensive office building, dyehouse, chemical plant and other small-scale manufacturer and organization for waste water treatment. The water quality of the influent from the equipment is able to reach the Sewage Comprehensive Discharge Standard regulated by the nation and all sets of the equipment can be buried underground, therefore, it is called “buried sewage treatment complete equipment".

II. Characteristic

1. ZWF1 type complete device for sewage treatment is buried underground and greening can be carried out to the surface above the equipment. It is not necessary to construct house, maintain heat and warmth retention. The anti-corrosion manufacturing can be carried out to the equipment with less than 5t/h water quantity by adopting the fiber glass or A3 steel board.

2. The secondary biological contact oxidation treatment process adopts the blast aeration. The activated sludge owns small volume and excellent adaptability to water quality. The influent water quality is stable without producing sludge swell.

3. The reaction tank utilizes the biological touch oxidation method and sludge discharge (the night cart is used for suction or dehydration for sludge cake for out transportation) needs carrying out for only three months (90 days).

4. The whole treatment equipment does not need establishing professionals for management under general circumstance, and only maintenance is entailed for the equipment at the proper time.

5. It owns quite strong adaptability to the change of the water quality with a small amount.

6. The compressed container, air compressor, circulation pump and other equipment become unnecessary, therefore, the investment cost has been reduced dramatically.

7. The power needed is low with fewer maintenance and artificial operation. ZWF is a process of oxygen exhaust and the odor problem produced by sludge has been resolved.

III. Application of the buried sewage treatment device

1. Hotel, restraint, sanatorium and hospital.

2. Residence community, village and town.

3. Station, air port, sea port wharf and ship.

4. Factory, mine, military, tourist side and scenic spot.

5. Various industrial sewage similar to the domestic sewage.

IV. Technological process chart

Sewage    Primary settling tank    Adjusting tank     Grade A biological tank (aerating device)

Discharge   Disinfection tank  Secondary sedimentation tank   Grade B biological tank (aerating device)

Figure 1: technological process chart of the buried domestic sewage treatment device

V. Main design parameter of the equipment

Table 1: designed influent and effluent index

Table II: Specification model