Efficient sewage purifying biological filter device and using method

A technology of biological filter and sewage treatment tank, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problem of not being able to meet the requirements for environmental protection of treated water and receiving water bodies, and the inability to achieve simultaneous removal of pollutants efficiency, inability to meet the overall requirements of sewage treatment, etc., to achieve the effect of helping growth and enrichment, reducing backwash costs, and low construction and operation costs

Pending Publication Date: 2019-03-01
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The sewage treatment efficiency and capacity of biofilters are affected by many factors. Ordinary biofilters only have a good removal effect on one or two pollutants in organic matter, ammonia nitrogen, total nitrogen and phosphorus in sewage, but cannot achieve good results. The simultaneous removal efficiency of pollutants, especially the low nitrogen removal efficiency, and the sewage treatment capacity is effective and there are clogging problems, so it usually cannot meet the overall requirements of sewage treatment
[0004] The low carbon-to-nitrogen ratio characteristic of organic matter and total nitrogen concentration ratio less than 6 is common in all kinds of sewage, and its low content of available organic carbon source greatly inhibits the denitrification of microorganisms, making the removal efficiency of biofilter for total nitrogen Low, unable to meet the environmental protection requirements of treated water receiving water body

Method used

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  • Efficient sewage purifying biological filter device and using method
  • Efficient sewage purifying biological filter device and using method
  • Efficient sewage purifying biological filter device and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) A cylindrical PE material filter tank with a height of 1.1m and a diameter of 0.1m, with a 5cm thick gravel layer at the bottom. It is filled with volcanic rock at a filling height of 0.25m; the top is filled with ceramsite at a filling height of 0.25m; the particle size range of volcanic rock and ceramsite is 5-8cm. The fiber silk material is placed on the upper layer, and the stacking height is 0.5m. 100g wooden sticks are put into 2 nylon mesh bags and dropped into the filter tank.

[0038] (2) The filter operates in a tidal manner. The influent water is heavily polluted urban river water after preliminary sedimentation treatment, its COD is 58mg / L, ammonia nitrogen is 7mg / L, nitrate nitrogen is 13mg / L, and total phosphorus is 1mg / L. The device can hold 4.0L of water. After the water inlet pump is turned on for 5 minutes, the filter tank is filled with sewage, and the water inlet pump is turned off. The device continued to treat for 16 hours under the conditi...

Embodiment 2

[0041] (1) A cylindrical PE material filter tank with a height of 1.1m and a diameter of 0.1m, with a 5cm thick gravel layer at the bottom. It is filled with volcanic rock at a filling height of 0.25m; above it is filled with zeolite at a filling height of 0.25m; the particle size of volcanic rock and zeolite is 5-8cm. The fiber silk material is placed on the upper layer, and the stacking height is 0.5m. 150g wooden sticks are put into 2 nylon mesh bags and dropped into the filter tank.

[0042] (2) The filter is operated in a tidal manner, and the influent is the tail water of a sewage treatment plant. Its COD is 45mg / L, ammonia nitrogen is 2.5mg / L, nitrate nitrogen is 12.5mg / L, and total phosphorus is 0.45mg / L. After the water inlet pump is turned on for 5 minutes, the filter tank is filled with sewage, and the water inlet pump is turned off. After the device is saturated, the treatment continues for 12 hours, then the water outlet valve is opened for 5 minutes, and the de...

Embodiment 3

[0044] (1) A cylindrical PE material filter tank with a height of 1.1m and a diameter of 0.2m, with a 5cm thick gravel layer at the bottom. It is filled with volcanic rock at a filling height of 0.25m; the top is filled with ceramsite at a filling height of 0.25m; the particle size of volcanic rock and ceramsite is 5-8cm. The fiber silk material is placed on the upper layer, and the stacking height is 0.5m.

[0045] (2) The filter operates in a tidal manner. The influent is rural domestic sewage after primary treatment, its COD is 180mg / L, ammonia nitrogen is 24mg / L, nitrate nitrogen is 2mg / L, and total phosphorus is 1.8mg / L. After the water inlet pump is turned on for 8 minutes, the filter tank is filled with sewage, and the water inlet pump is turned off. After the device is saturated, the treatment continues for 8 hours, and then the outlet valve is opened for 8 minutes. After the treated water is discharged, the device is left empty for 12 hours. The cycle is repeated. ...

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Abstract

The invention relates to an efficient sewage purifying biological filter device and a using method. The device comprises a column-type sewage treatment pond, an inorganic porous filler layer, an organic fiber medium layer, a water inlet pipe arranged on the top of the column-type sewage treatment pond, a water outlet pipe arranged at the bottom of the column-type sewage treatment pond, a water inlet pump arranged on the water inlet pipe and a water outlet valve arranged on the water outlet pipe, wherein the inorganic porous filler layer and the organic fiber medium layer are successively arranged in the column-type sewage treatment pond from bottom to top, and the inorganic porous filler layer in the column-type sewage treatment pond comprises upper and lower layers, namely, a volcanic layer and ceramsite or a zeolite layer from bottom to top; a gravel layer is arranged on the lower portion of the inorganic porous filler layer. The device has a good synchronous effect of removing organic matters, nitrogen and phosphorus in sewage, the sewage treatment capacity of the device can be effectively improved, blockage of a filter is delayed, construction and operation cost is low, and thedevice can be flexibly used for dispersed sewage treatment on various occasions and is especially applicable to treatment of the sewage with low carbon nitrogen ratio.

Description

technical field [0001] The invention relates to the technical field of sewage treatment devices, in particular to the technical field of a device structure and a use method capable of efficiently purifying sewage. Background technique [0002] Biological filter is a commonly used sewage treatment technology. It uses the adsorption, filtration and interception of filter fillers and the conversion and degradation of microbial membranes attached to it to remove various pollutants in sewage. It can be flexibly used in various occasions in sewage treatment. For example, a biofilter constructed using ordinary gravel as a substrate is a commonly used decentralized sewage treatment facility. In order to increase the dissolved oxygen in the biofilter to facilitate the removal of oxygen-consuming pollutants, aeration facilities are often added to the biofilter. In order to reduce filter clogging and improve the hydraulic conditions of the device, backwashing facilities are often ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F3/28C02F101/10C02F101/16
CPCC02F3/2806C02F3/2826C02F3/308C02F3/34C02F2003/001C02F2101/10C02F2101/16C02F1/281C02F2305/06C02F2209/16C02F2209/15
Inventor 常军军陈金全申时立贾威梅坚
Owner YUNNAN UNIV
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