Integrated A/O bacteria filter device for treating dispersed wastewater

Abstract

The invention relates to an integrated A / O bacteria filter device for treating dispersed wastewater, which has a cylindrical structure in shape. The center of the integrated A / O bacteria filter device is provided with a cylindrical erect flow primary settling tank, a baffle wall is arranged between an inner cylinder body and an outer cylinder body, and a space is divided into an adjusting tank, a hypoxia bacteria filter, an aerobe filter, a clear water tank and a mud storage tank. The aerobe filter and the clear water tank are in a concentric circle arc structure. Wastewater in the adjusting tank is lifted into the primary settling tank through an air lifter, the settled wastewater and recycled nitrification liquor are together distributed into the hypoxia bacteria filter for denitrification, the bottom and the middle part of the hypoxia bacteria filter are provided with backwashing pipelines which can realize subsection washing; the hypoxia bacteria filter is communicated with the bottom of the aerobe filter, the denitrified wastewater overflows from the surface into the clear water tank for outputting after organic matters are removed and nitrification is carried out in the aerobe filter. The backwashing wastewater of the device flows into the adjusting tank per se, and mud in the primary settling tank is lifted into the mud storage tank through the air lifter. The invention has the advantages of less investment, little operation cost, longer mud discharge period and convenient management, thereby being suitable for treating the dispersed wastewater in countryside.

Description

technical field [0001] The invention relates to a small sewage treatment reactor device for distributed domestic sewage in rural areas, in particular to an integrated A / O biofilter device for treating dispersed domestic sewage. Background technique [0002] Most of the domestic sewage in rural areas of our country is directly discharged into rivers without treatment, which seriously pollutes water bodies and is one of the important reasons for eutrophication of water bodies. Therefore, it is very necessary to treat rural domestic sewage. [0003] Due to the scattered households in rural areas, the wide area and large volume of sewage discharge, the collection of centralized treatment requires a huge drainage pipeline collection system, and the investment cost is very huge. Therefore, the centralized sewage treatment mode is not suitable for the treatment of rural decentralized domestic sewage. The decentralized sewage treatment mode can overcome some shortcomings of the cen...

AI Technical Summary

Problems solved by technology

However, the application of aerobic biofilters in urban domestic sewage treatment plants is currently mainly distributed in Europe and the United States. The relevant research and application in my country is relatively late, and the overall lag behind the world's advanced level

[0005] In view of the characteristics of rural decentralized sewage treatment, the existing aerobic biofilter technology has the following deficiencies: ① The research and application of rural decentralized sewage treatment is seriously insufficient, and the existing patents and technologies are basically developed for urban domestic sewage or industrial sewage ② The degree of integration is not high

Sewage lifting, aeration, backwashing, sludge lifting and treatment all require special electrical equipment, which consumes a lot of power; ④Backwashing frequency affects treatment capacity and effluent quality

The interception of SS and COD in the influent by the filter mainly occurs in the initial 0~30cm packing layer along the direction of water flow, which leads to increased head loss in the filter and even filter blockage. However, during backwashing, often Backwashing for the entire filter will not only fail to make full use of the retention capacity (capacity) of the filter, but also result in frequent backwashing, a long time, and a large water consumption, and will greatly damage the formed biofilm, which will affect the initial effluent quality after backwashing and system processing capacity

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