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Novel diving jet-type biological aerated filter

An aerated biological filter, biological filter technology, applied in sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Unfavorable microbial growth, pollutant metabolism, affecting sewage treatment effect, etc., to achieve the effect of improving effluent treatment effect, improving oxygen transfer efficiency, and improving gas-liquid mixing effect

Inactive Publication Date: 2013-04-03
SUZHOU RES INST OF TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing biological aerated filter needs to use a blower to provide air source for aeration. The disadvantage is that the air source provided by the blower is not uniform enough to release the gas through the aeration head, and some filter materials are washed away and lose the bio-organisms on the surface of the filter material. Membranes, some filter materials are clogged, and the microorganisms in the filter layer cannot get effective oxygen supply, which is not conducive to the growth of microorganisms and the metabolism of pollutants. After entering the sewage, the oxygen residence time in the air is short, and the gas-liquid mixing is uneven, which will also affect the sewage Processing effect

Method used

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  • Novel diving jet-type biological aerated filter

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Embodiment 1

[0020] To treat a domestic sewage, the raw water quality condition is: chemical oxygen demand (COD cr ) content 250-300mg / L, biological oxygen demand (BOD 5 ) content of 120-150mg / L, ammonia nitrogen of 8-10mg / L, and total nitrogen (TN) of 20-25mg / L. Through self-priming jet aerated biological filter treatment, the water retention time is 4 hours. After the system runs stably for a period of time, after the sewage is treated, the final effluent COD cr Below 20mg / L, BOD 5 The ammonia nitrogen is less than 5mg / L, the ammonia nitrogen is 2-5mg / L, and the total nitrogen is less than 10mg / L. The effluent meets the first-class A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

Embodiment 2

[0022] Treatment of an industrial waste water, the waste water is a food production waste water, the raw water quality condition is: COD cr Content 500-700mg / L, BOD 5 The content is 300-400mg / L, the ammonia nitrogen is 10-20mg / L, and the total nitrogen is 30-40mg / L. This kind of wastewater has good biodegradability, so it is directly treated through the self-priming jet aerated biological filter, and the water retention time is 6 hours. After the system runs stably for a period of time, after the sewage is treated, the final effluent COD cr Below 30mg / L, BOD 5 The ammonia nitrogen is less than 5mg / L, the ammonia nitrogen is 2-5mg / L, the total nitrogen is less than 10mg / L, and the effluent meets the first-class A standard of the industry.

[0023] The present invention uses a submersible jet aerator to replace the original blast aeration equipment, and the air filled in is forced to mix with the liquid in the casing, so excellent gas-liquid mixing effect can be obtained. At ...

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Abstract

The invention discloses a novel diving jet-type biological aerated filter, comprising a biological filter, wherein a filter filler part and a filter material layer are arranged in the biological filter; a water inlet tube is arranged at the upper end of the biological filter, and a water outlet tube is arranged at the lower end of the biological filter; a bridge is installed at the top end of the biological filter; a diving jet-type aerator which is fixed via a hoisting chain is installed on the bridge; and the main machine of the diving jet-type aerator is installed below the filter filler part. Via the mode aforementioned, the novel diving jet-type biological aerated filter disclosed by the invention is capable of effectively improving gas-liquid mixing effect, realizing uniform gas distribution, increasing oxygen utilization rate, creating an environment suitable for growth of microbes which are used for oxygenolysis of organic matters, improving effluent treatment effect, and saving space and construction cost.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a novel submersible jet type aerated biological filter for domestic sewage and organic industrial wastewater treatment. Background technique [0002] Biological aerated filter (BAF) is a sewage treatment process that emerged in the late 1980s and early 1990s. It is a sewage treatment equipment integrating biodegradation, solid-liquid separation and integration. The biological aerated filter is widely used in the treatment of domestic sewage and organic industrial wastewater. The sewage enters the tank body from the upper part of the filter, and passes through the filter layer composed of fillers, forming a biofilm formed by microbial habitat on the surface of the fillers. While the sewage is being filtered through the filter layer, the lower part of the pool is aerated to the filter layer through the air pipe, the air rises from the gap of the filler, and contacts the d...

Claims

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Application Information

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IPC IPC(8): C02F3/02C02F3/34
CPCY02W10/10
Inventor 陈阳薛勇刚戴晓虎薛韵涵戴翎翎章婷婷
Owner SUZHOU RES INST OF TONGJI UNIV
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