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Multi-stage aerating biofilter

A technology of biological aerated filter and biological filter material, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. The problems of single oxygen quantity method and fixed operation mode are beneficial to the distribution of dissolved oxygen, the purification effect is good, and the concentration of oxygen is uniform.

Active Publication Date: 2015-12-16
JINAN MUNICIPAL ENG DESIGN & RES INSITITUTE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pool type of the traditional biological aerated filter has the disadvantages of fixed operation mode, single means of adjusting the oxygen supply, and the filter material is easy to be lost during the washing process. Moreover, the uniformity of dissolved oxygen cannot be accurately controlled in the traditional biological aerated filter.

Method used

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  • Multi-stage aerating biofilter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The multi-point aeration device has a mesh structure, and several aeration holes are evenly distributed on the mesh structure, and the direction of the aeration holes is obliquely upward. The multi-point aeration device communicates with the blower 1 through a valve. The network structure of the multi-point aeration device 6 is connected everywhere, and the network structure will not block the flow of water, and can provide uniform oxygen for anhydrous.

[0042]A dissolved oxygen meter 3 is arranged in the liquid surface of the water outlet area. Both the blower 1 and the dissolved oxygen meter 3 are connected to the control system, and the dissolved oxygen meter 3 transmits the dissolved oxygen concentration signal to the control system, and the control system controls the blower 1 to be turned on or off by comparing the measured value with the set value.

[0043] The multi-point aeration device 6 has two layers, and the two layers of multi-point aeration devices 6 ar...

Embodiment 2

[0063] The multi-point aeration device 6 is composed of a number of aeration pipes connected to each other and arranged in parallel. Many aeration holes are evenly distributed on the aeration pipes, and the direction of the aeration holes is upward. The number of layers of multi-point aeration device 6 is 3 layers, also can be 4 layers, 5 layers, concrete several layers are determined according to specific conditions. These layers of multi-point aeration devices 6 are evenly distributed in the filter layer, and the biological filter material is filled in the entire filter layer.

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Abstract

The invention discloses a multi-stage aerating biofilter which comprises a control system as well as a water inlet region, a filter region and a water outlet region which are sequentially arranged from bottom to top, wherein the control system is connected with the water inlet region, the filter region and the water outlet region; the filter region is filled with bio-filler material and a plurality of layers of multi-point aerating devices are mounted in the bio-filler material; the filter region is divided into a carbon oxidization region and a nitrification region; the carbon oxidization region is positioned above the nitrification region; the control system distributes oxygen inlet amount of the multi-point aerating device in each layer according to concentrations of carbon source pollutants and nitrogen source pollutants in sewage. The multi-point aerating filter disclosed by the invention changes the single aerating mode of a conventional aerating biofilter into multi-layered aeration and realizes signal collection and feedback with a dissolved oxygen analyzer to realize automatic control and precisely control of gas inlet amount so as to realize energy conservation. Through a set operational mode, nitrogen and phosphorus removal is realized. Multi-layered aerating layers play a certain curing and controlling role on the bio-filler, so that the filter layers are greatly reduced in a backwashing state.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a multi-stage aerated biological filter. Background technique [0002] Biological aerated filter, referred to as BAF, is a new type of biofilm sewage treatment process developed in Europe and the United States in the late 1980s. It can remove nitrogen and phosphorus. This process has the functions of removing SS, COD, BOD, nitrification, nitrogen removal, phosphorus removal, and AOX (harmful substances). Biological aerated filter is a new process integrating biological oxidation and interception of suspended solids. The pool type of the traditional biological aerated filter has the disadvantages of fixed operation mode, single means of adjusting the oxygen supply, and the filter material is easy to be lost during the washing process. Moreover, the uniformity of dissolved oxygen cannot be accurately controlled in the traditional biological aerated filter. ....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 孙逊张鑫徐玮郑伟杰张扬王婷
Owner JINAN MUNICIPAL ENG DESIGN & RES INSITITUTE GRP
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