Airlift type integrated sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment, and specifically relates to an airlift type integrated sewage treatment device. The airlift type integrated sewage treatment device comprises an adjusting tank, an anaerobic tank, an anoxic tank, an aerobiotic tank and a sedimentation tank which are installed in a shell and are communicated in sequence. The aerobiotic tank is provided with an aerator pipe and a first airlift mechanism; the first airlift mechanism comprises a first air inlet and a first lifting pipe; an inlet of the first lifting pipe extends to a medium-lower part of the aerobiotic tank; the first an outlet of the first lifting pipe is communicated with the anoxic tank; the first airlift inlet pipe is communicated with the first lifting pipe; both the aerator pipe and the first air inlet pipe are connected to a draught fan; and a meshy deoxidization frame matching with a cross section of the aerobiotic tank is disposed in the aerobiotic tank and above a water inlet of the aerobiotic tank. The first airlift mechanism, a second airlift mechanism and the aerator pipe are sent air by the same draught fan, thereby reducing components in the device, reducing cost of the device, simplifying the structure of the device and facilitating maintenance of the device. A liquid and sludge are refluxed in an airlift manner, so that energy consumption of the device can be reduced and operation cost is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an air-lift integrated sewage treatment device. Background technique [0002] According to statistics, the total amount of sewage discharge in my country has reached 62 billion tons, most of which are directly discharged into rivers and lakes without treatment. Nearly a quarter of the lakes have been polluted to varying degrees, and nearly 60% of them There are no sewage treatment plants in cities and towns, and domestic sewage in rural areas is basically discharged directly without treatment. With the continuous advancement of rural urbanization, more than 80% of domestic sewage will come from rural areas and cities in the future. In 2013, my country's rural and urban domestic sewage discharge has reached 30 billion m 3 , and a large amount of scattered domestic sewage has caused serious pollution to underground drinking water sources, surface runoff, and farmland soil...

AI Technical Summary

Problems solved by technology

[0003] The sludge concentration in the integrated sewage treatment equipment is usually maintained at a relatively high level, which easily leads to low oxygen transfer rate, large operating energy consumption, high water temperature and low sludge activity.

In order to remove nitrate nitrogen, the existing integrated equipment needs to return the nitrifying liquid from the aerobic tank to the anoxic tank. Sludge returns to the pre-denitrification tank, so it is often necessary to install nitrifying liquid return pumps and sludge return pumps, and install corresponding solenoid valves at the same time, which not only increases equipment costs and later operating costs, but also increases equipment failure points. Not conducive to equipment maintenance

In addition, the liquid in the anaerobic tank of the existing integrated sewage treatment equipment usually has the problem of high dissolved oxygen, so that the anaerobic microorganisms in the anaerobic tank cannot play their role better, affecting the effect of sewage treatment

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