Mixed filler fluidized tank coupled constructed wetland sewage advanced treatment apparatus

Abstract

The invention relates to the field of environmental protection apparatuses, and concretely relates to a mixed filler fluidized tank coupled constructed wetland sewage advanced treatment apparatus. Sewage sequentially flows through an anaerobic tank, a fluidized tank, a sedimentation tank, a primary wetland, a phosphorus removal tank and a secondary wetland; a flexible fiber rope filler is arrangedin the anaerobic tank, the fluidized tank is provided with a moving bed and a porous polymer mixed biological filler and can realize fluidized movement, a gravel and quartz stone filler is arranged in each of the primary wetland and the secondary wetland, and wetland plants are planted in each of the primary wetland and the secondary wetland; and an aeration tube is arranged in the fluidized tank, and is externally connected with an aeration control device, a return tube is arranged in the sedimentation tank and is externally connected with a return pump control device, and the control devices realize automatic control in a numerical control switch operation mode. The apparatus overcomes the deficiencies in the prior art, is obtained by innovating the universality of a traditional anaerobic, aerobic and ecologic sewage treatment technology, has the advantages of novel process, compact structure, high space utilization rate, small occupied area, enhancement of nitrogen and phosphorus removal, and stable water discharge, and has great promotion and application values.

Description

technical field [0001] The invention relates to the field of environmental protection devices, in particular to a mixed filler fluidization pool coupled artificial wetland sewage advanced treatment device. Background technique [0002] With the steady development of the economy in the vast areas of China, the living standards of urban and even rural residents have been continuously improved, and the pollution problems caused by domestic sewage discharge have become increasingly severe. According to statistics, as of the end of 2016, about 28% of the country's official towns treated domestic sewage, and only 9% of townships treated domestic sewage. The content of nitrogen and phosphorus pollutants in domestic sewage is relatively high. If these nutrients are not treated but directly discharged into rivers, lakes, reservoirs and other natural water bodies, it will induce black and odorous water bodies, eutrophication and other phenomena, and reduce the regional water ecology. ...

AI Technical Summary

Problems solved by technology

[0004] Common domestic sewage treatment processes or systems at this stage, some of which use traditional biochemical treatment technologies such as anaerobic or aerobic, such as A / O, A 2 / O, SBR, CASS, oxidation ditch, biological filter, etc., have relatively high investment costs, operation and maintenance costs, require professional and complex operation management, residual sludge discharge and odor emission, and effluent water cannot meet the standards stably, etc. Disadvantages; while the other part is treated with ecological technology, such as artificial wetlands, stabilization ponds, land infiltration systems, etc., there are also problems such as excessive land occupation, low treatment load, and long residence time of water bodies.

Although, in recent years, some composite processes have emerged, combining anaerobic, aerobic or ecological treatment technologies for multi-level intensive treatment, but this increases the consumption of land resources and investment management costs, and its application is limited

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