Biological aerating filter

A biological aeration filter and aeration technology, applied in the field of sewage treatment system, can solve the problems of high energy consumption and high investment, and achieve the effect of high treatment load, high transmission efficiency and good treatment effect

Inactive Publication Date: 2013-11-27
JIANGSU ZHENYU ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical solution needs to occupy a larger area of ​​land and also requires a higher investment
In addition, in order to ensure that the filter material and microorganisms can fully contact and react with the sewage in these additional treatment filters, it is necessary to equip stirring equipment and carry out sufficient stirring during sewage treatment operations, so its energy consumption is relatively high

Method used

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  • Biological aerating filter

Examples

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example 1

[0015] Example 1: First select 40% fly ash, 5% cement, 10% anthracite, 8% gypsum, 3% magnesium chloride, 10% sludge and 24% water, mix and stir well, and cure in water bath at 50°C for 1 hour, demoulding and curing for 1 hour , the roasting temperature is 600°C, and the roasting time is 0.5h. The removal rate of BOD per kilogram of filter material can reach 1.5; the average concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus in the water are 76mg / L, 13mg / L, respectively. 21mg / L, 1.94mg / L domestic sewage, the aeration time is 10 minutes, the biological aeration gas-liquid ratio is 15:1, the average concentration of COD, ammonia nitrogen, total nitrogen and total phosphorus in the effluent after treatment is 11.7mg / L , 4mg / L, 4.7mg / L and 0.04mg / L, the removal rates of COD, ammonia nitrogen, total nitrogen and total phosphorus are 85%, 73%, 77.7% and 98% respectively, and the treated effluent meets the " Water Quality Standards for Domestic Miscellaneous ...

example 2

[0016] Example 2: First select 41% fly ash, 8% cement, 15% anthracite, 6% gypsum, 5% magnesium chloride, 8% sludge and 17% water, mix and stir thoroughly, and cure in a water bath at 55°C for 1.5 hours, demoulding and curing 1.5h, the roasting temperature is 600°C, and the roasting time is 0.8h, and the removal rate of 1.8 BOD can be achieved per kilogram of filter material. The average concentration of influent COD, ammonia nitrogen, total nitrogen and total phosphorus is 80mg / L, 15mg / L, 25mg / L, 1.56mg / L respectively, the aeration time is 15 minutes, and the biological aeration vapor-liquid ratio is 20 : 1, the average concentration of COD, ammonia nitrogen, total nitrogen and total phosphorus in the effluent after treatment is 12.3mg / L, 5mg / L, 6.8mg / L and 0.087mg / L, and the removal rate of COD, ammonia nitrogen, total nitrogen and total phosphorus They are 84.6%, 66.6%, 72.8% and 94.4% respectively, and the treated water meets the "Water Quality Standard for Miscellaneous Do...

example 3

[0017] Example 3: First select 42% fly ash, 6% cement, 12% anthracite, 5% gypsum, 4% magnesium chloride, 6% sludge and 25% water, mix and stir thoroughly, maintain in a water bath at 60°C for 2 hours, and remove the mold for 2 hours , the roasting temperature is 600°C, and the roasting time is 1h. The removal rate of BOD per kilogram of filter material can reach 2.0. The average concentrations of COD, ammonia nitrogen, total nitrogen and total phosphorus in the influent are 85mg / L, 20mg / L and 30mg respectively. / L, 2.27mg / L domestic sewage, the aeration time is 20 minutes, the biological aeration gas-liquid ratio is 30:1, the average concentration of COD, ammonia nitrogen, total nitrogen and total phosphorus in the effluent after treatment is 14.3mg / L, 6.8mg / L, 9.1mg / L and 0.125mg / L, the removal rates of COD, ammonia nitrogen, total nitrogen and total phosphorus are 83.1%, 66%, 69.6% and 94.4% respectively, and the treated effluent meets the " Water Quality Standards for Domes...

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Abstract

The invention discloses a biological aerating filter which comprises a water inlet pipe (1), an aerator pipe (2), an aeration gas distribution area (3), a sludge layer (4), a biofilm culturing area (5), a supporting layer (6), a filter material layer (7), a water stabilization layer (8) and an effluent weir (9). The biological aerating filter utilizes the aerobic zone of the aerator pipe to enable the influent sewage to fully have a denitrification reaction under the function of anaerobe; the sewage is adsorbed via a filter material, and the contents of nitrogen, phosphorus and the like in the sewage are reduced; the sewage flows to the aeration gas distribution area and enters into an anoxic zone, and organic matters in the sewage are fully processed under the function of the anaerobe. The biological aerating filter occupies a small area, is excellent in treatment effect and short in technological process; the removal rates of COD, ammonia nitrogen, total nitrogen and total phosphorus in the sewage processed via the biological aerating filter reach more than 83%, more than 66%, more than 70% and more than 94% respectively; the major water quality indicators meet the primary standard of the integrated national wastewater discharge standard.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a biological aeration filter tank, which enables the main water quality index to reach the first-level standard of the national sewage comprehensive discharge standard. Background technique [0002] From the 1980s to the 1990s, the biological aerated filter (BAF) was produced on the basis of the ordinary biological filter, and because the many advantages of the upward flow filter were recognized by people, most of them in recent years The biological aeration filter adopts an upward flow structure. The basic structure of this type of biological aerated filter is a supporting layer composed of pebbles or magnetite above the buffer water distribution area. In the water area, there are outlet tanks and outlet pipes with weirs above the water area. The water supply pipes for the treated sewage, the backwash water supply pipes, and the backwash air supply pipes are all located in the buffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 李振宇
Owner JIANGSU ZHENYU ENVIRONMENTAL PROTECTION TECH
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