Vertical deflector combined Filtration type dephosphorization and nitrogen rejection facility

Abstract

The device contains at least two single filter tanks connected each other, water entrance pipe connected with first single filter tank and water exit pipe connected with last single filter tank, devision plates are used to separate the single filter tanks up and down crisscrossed, sewage up and down baffling passageway is preset. Bottom of single filter tank are mud collector, mud sludging pipe and filling layer is the middle part, the fillings are anaerobic filling, aerobic filling and high-grad iron filling, at least two of them are combined to put into the filter tanks, each fillings combination is put to one filter tank to form different function area. The design of sewage up and down baffling passageway is to ensure obtaining length of flow path required by process, the combination of mutiple fillings is suited for requirements of different water quality.

Description

Technical field: [0001] The invention belongs to the technical fields of sewage treatment and environmental protection, and in particular relates to a vertical baffle combined filter type phosphorus and nitrogen removal device. Background technique: [0002] Through scientific and technological novelty research, there is no report on the vertical baffle combined filter type phosphorus and nitrogen removal device for sewage treatment at home and abroad. Most of the existing filtering devices are of a single type of upward flow and downward flow. In the sewage treatment technology, compared with the activated sludge method, the biological aerated filter has the characteristics of small footprint, low infrastructure investment, high treatment efficiency, and convenient management. However, there are defects in the structure design of the traditional biological aerated filter, which is prone to clogging, has high requirements for suspended solids in the influent, and has a shor...

AI Technical Summary

Problems solved by technology

However, there are defects in the structure design of the traditional biological aerated filter, which is prone to clogging, has high requirements for suspended solids in the influent, and has a short operating cycle. Generally, backwashing is required in 1 to 2 days, and the sewage needs to be raised to enter the filter. Higher height, higher energy consumption, these problems lead to higher operating costs and inconvenient management

In addition, the traditional biological aerated filter does not make a reasonable selection and combination of filler distribution and arrangement. In sewage treatment, the realization of functions such as carbonization, nitrification, denitrification, and phosphorus removal has great impact on the characteristics of fillers, pollutant loads, and aeration. The requirements for air and other parameters are not the same. It is difficult for the traditional biological aerated filter to achieve efficient phosphorus and nitrogen removal functions in the same tank, and it is difficult to meet the emission standards.

Generally, phosphorus can only be removed through further chemical precipitation, and chemical precipitation requires the addition of metal ion precipitants, which are expensive and may increase the chroma of the effluent due to the high concentration of residual metal ions (such as iron ions). The phosphorus process requires more mechanical equipment and complex operation and management, so the equipment investment and operating costs are relatively high

[0003] It is these shortcomings that directly restrict the wide application of biological aerated filter in the field of sewage treatment

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