Purification tank and sewage treatment process

Abstract

The invention relates to the technical field of sewage treatment. The invention discloses a purification tank and a sewage treatment process. The purification tank comprises a tank body, wherein the interior of the tank body is sequentially divided into a pretreatment zone, an anaerobic zone, an aerobic zone and a settling zone through a plurality of partition plates; the pretreatment zone, the anaerobic zone, the aerobic zone and the settling zone are sequentially communicated through overflow holes formed in the partition plates; a water inlet and a water outlet are formed in the tank body;the water inlet is communicated with the pretreatment zone; the water outlet is communicated with the settling zone; a pipeline device for sewage backflow, aeration and backwashing is also arranged inthe tank body. A plurality of treatment modes of pretreatment, anaerobic treatment and aerobic treatment are combined, the sewage treatment effect is good, the system operation cost is low, the carrying is convenient, equipment is flexible and changeable, the installation is convenient, and the purification tank and the process are suitable for different types of distributed treatment schemes, and can economically and effectively treat rural sewage.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a purification tank and a sewage treatment process. Background technique [0002] my country has a vast territory, scattered rural population, and backward sewage treatment infrastructure, especially in remote rural areas with relatively backward economy. Compared with urban sewage treatment with complete pipe network facilities, rural areas are remote due to their location, weak economic foundation, and weak awareness of environmental protection among villagers. There is no sewage collection pipe network and centralized sewage treatment plant, and a large amount of domestic sewage is discharged into rivers and lakes, causing water pollution. Eutrophication breeds mosquito and fly viruses, causing serious harm to the health of villagers. Domestic sewage treatment technologies such as constructed wetlands and oxidation ponds cannot effectively solve the problem of rural ...

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Problems solved by technology

[0005] (2) In economically underdeveloped regions, the per capita sewage discharge is less, and the sewage discharge in different regions is also quite different;

Although domestic researchers have proposed technical measures such as UASB (upflow anaerobic sludge bed reactor), buried contact oxidation tank, membrane bioreactor and other technical measures to treat rural domestic sewage, they have large investment and high energy consumption. , Difficult management, complicated operation, high treatment cost and other shortcomings have failed to promote it to rural sewage treatment

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