Unpowered sewage treatment device

Abstract

The invention provides an unpowered sewage treatment device in order to integrate pretreatment and advanced treatment of sewage and carry out aerobic biochemical treatment, anaerobic biochemical treatment and solid-liquid separation treatment on the sewage by utilizing a small altitude difference to enable the sewage to reach the discharge or reuse standard. The device comprises a water inlet pipe1, an excrement tank 2, a biochemical tank 3 and a water outlet pipe 4, a filtering system 5 is arranged in the excrement residue pool and connected with the biochemical pool 3 through a connecting pipe 9, a lower partition plate 6 and an upper partition plate 7 are arranged in the biochemical pool 3, under the filtering action of the filtering system 5, solid pollutants in sewage are interceptedin the excrement residue pool 2, the sewage enters the filtering system 5 and enters the biochemical pool 3 through the connecting pipe 9, and exchange of surface water and lower water is completed for multiple times under the action of the lower partition plate 6 and the upper partition plate 7. After aerobic, anoxic and anaerobic biochemical reactions are completed for many times to degrade pollutants, the pollutants flow out of the water outlet pipe 4.

Description

technical field [0001] The invention belongs to the field of water pollution control and sewage treatment, and in particular relates to an unpowered sewage treatment device. Background technique [0002] Septic tank is an important sewage pretreatment device, but it is difficult to meet the relevant discharge or reuse standards by simply using septic tank to treat sewage, and it needs to be treated in depth before discharge or reuse. However, the investment and operating costs of the scattered advanced sewage treatment facilities are relatively high, so the sewage collection pipe network is built to collect the scattered sewage and then a centralized sewage treatment plant is built for advanced treatment. This is the widely used sewage treatment mode of "septic tank + sewage collection pipe network + centralized sewage treatment plant". [0003] The investment and operation costs of the existing sewage treatment model include three parts: septic tank, sewage collection pipe...

AI Technical Summary

Problems solved by technology

For rural areas where management is difficult, some household-based sewage treatment devices have been developed on the market, but these devices still require septic tanks for pretreatment at the front end, and at the same time, the power supply for mechanical aeration generates high investment and operating costs. In areas where sewage discharge is concentrated, there is no economic advantage

[0004] The hydraulic retention time of septic tanks is generally 12~36h, and its main function is anaerobic biochemical and clarification. It is difficult to meet the discharge or reuse standards only by septic tank treatment. The main problem is the lack of aerobic biochemical reactions, so The household sewage treatment devices currently on the market add mechanical aeration facilities behind the septic tank, which increases the investment and operating costs of power supply.

Images