Ecological sewage treatment device and method

Abstract

The invention relates to an ecological sewage treatment device and method. The ecological sewage treatment device comprises a wall shell, a bottom plate, an overflow channel, an inner cylinder, an annular column unit formed in the inner cylinder, a suspension island formed in the inner cylinder and fixed to the inner cylinder through a support, an oxygen supply assembly arranged at the bottom of the inner cylinder, a sewage inlet pipe communicating with the suspension island and an air inlet pipe communicating with the oxygen supply assembly, wherein a monitoring probe is arranged in the overflow channel, a first anoxic zone, an anaerobic zone and a second anoxic zone are sequentially formed in the suspension island through biological stuffing, the circular column unit forms an aerobic zone, an upper ecological unit and a lower precipitation unit are arranged between the wall shell and the inner cylinder, a gas flushing pipe is arranged at the bottom of the ecological unit, and the precipitation unit comprises at least three stages of three-phase separators. The device further comprises a control unit, wherein the control unit is used for controlling the air inflow amount of the oxygen supply assembly, the air inlet pipe and the air flushing pipe according to the water inlet amount of the sewage inlet pipe and data of the monitoring probe. The device is high in integration, low in energy consumption and low in cost, and realizes efficient standard treatment of dispersed and small-volume domestic sewage.

Description

technical field [0001] The invention belongs to the field of domestic sewage treatment, in particular to an ecological device and method for sewage treatment. Background technique [0002] Generally speaking, the construction of sewage treatment system includes sewage pipe network and sewage station, and the construction investment cost of sewage pipe network is relatively expensive. Especially considering areas with complex topography, it will be more difficult to excavate and lay pipelines in the sewage pipe network, so it is extremely important to develop methods for on-site sewage treatment. [0003] CN109734262A discloses a domestic domestic sewage purification tank. The space filled with different biochemical fillers in the tank is divided from bottom to top into anaerobic zone, anoxic zone and aerobic zone through a partition plate. The effect of sewage treatment is achieved under the action of water inlet pipe, air inlet pipe and aeration device. However, the purif...

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Problems solved by technology

However, the sedimentation area in the purification tank is limited, and the sedimentation efficiency is low. At the same time, the aeration tank lacks a pre-anoxic tank, resulting in a mediocre denitrification effect, and the SS in the treated water is still exceeding the standard.

[0005] At present, it is also necessary to realize that the inflow of domestic sewage is not balanced, and it is often discharged at certain times of the day. The above two kinds of purification tanks are usually not resistant to the concentrated impact of sewage, and dead sludge is prone to occur

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