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Biological aerated filter filler preparation method capable of simultaneously removing phosphorus and nitrogen, and application thereof

A biological aerated filter, simultaneous nitrogen and phosphorus removal technology, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of increasing material preparation costs, low open porosity, and Energy saving and environmental protection issues

Inactive Publication Date: 2013-06-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two kinds of biological aerated filter fillers do not add pore-forming agents, have low porosity, low open porosity, and low biological load, and inorganic adhesives are added in the granulation process, which increases the cost of material preparation , nor energy saving and environmental protection

Method used

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  • Biological aerated filter filler preparation method capable of simultaneously removing phosphorus and nitrogen, and application thereof
  • Biological aerated filter filler preparation method capable of simultaneously removing phosphorus and nitrogen, and application thereof
  • Biological aerated filter filler preparation method capable of simultaneously removing phosphorus and nitrogen, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The building fly ash aerated concrete blocks are crushed and sieved to obtain particles with a particle size of 3-6mm, which are filled into a filter column with a diameter of 100mm and a height of 2000mm. In this test, the natural hanging film is used. When the air-water ratio is 2:1, the hydraulic load is 0.3m 3 / (m 2 . h) under the conditions. The biological aerated filter has been in normal operation for 5 months, and the main pollutants COD, NH 3 -N, P, SS, TN are continuously monitored (see Figure 4 ).

[0028] Influent COD, NH 3 - When N, TN, P, and SS are 10-45mg / L, 10-30mg / L, 10-30mg / L, 0.5-2mg / L, 5-100mg / L, the biological aerated filter can remove COD, NH 3 -N, TN, P, SS removal rates are 85-97%, 85-99%, 85-93%, 45-90%, 90-95%, respectively.

[0029]

Embodiment 2

[0031] Break and sieve the fly ash aerated concrete blocks used for construction to obtain particles with a particle size of 6-10 mm, and fill them into a filter column with a diameter of 100 mm and a height of 2000 mm. In this test, the natural hanging film is used, the air-water ratio is 5:1, and the hydraulic load is 0.4m 3 / (m 2 . h) under the conditions. The biological aerated filter has been in normal operation for 5 months, and the main pollutants COD, NH 3 -N, P, SS, TN are continuously monitored (see Figure 4 ).

[0032] Influent COD, NH 3 - When N, TN, P, and SS are 10-50mg / L, 5-30mg / L, 4-40mg / L, 0.5-1mg / L, 10-100mg / L, biological aerated filter can remove COD, NH 3 -N, TN, P, SS removal rates are 80-90%, 85-90%, 80-93%, 50-90%, 80-95%, respectively.

[0033]

Embodiment 3

[0035] Break and sieve the fly ash aerated concrete blocks used for construction to obtain particles with a particle size of 10-20 mm, and fill them into a filter column with a diameter of 100 mm and a height of 2000 mm. In this test, the natural hanging film is used, the air-water ratio is 7:1, and the hydraulic load is 0.4m 3 / (m 2 . h) under the conditions. After 5 months of normal operation of the biological aerated filter, the main pollutants COD, NH 3-N, P, TN, SS were continuously monitored (see Figure 4 ).

[0036] Influent COD, NH 3 - When N, TN, P, and SS are 15-50mg / L, 15-30mg / L, 10-40mg / L, 0.5-1.5mg / L, 20-100mg / L, the biological aerated filter can remove COD , NH 3 -N, TN, P, SS removal rates are 70-97%, 80-99%, 75-90%, 60-90%, 90-95%, respectively.

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Abstract

The invention discloses a biological aerated filter filler preparation method capable of simultaneously removing phosphorus and nitrogen, and application thereof. The preparation method comprises the following steps of: crushing powder ash air-entrained concrete or defective products of a building block manufacturing factory into particles by using a crusher; sieving to obtain particle materials within different grain size ranges to be used as the biological aerated filter filler. The powder ash air-entrained concrete has the characteristics of small density, high void ratio, large specific surface area and the like, has the characteristics of large phosphate adsorption capacity in water and high loaded microorganism quantity when being used for the biological aerated filter filler, and has the function of simultaneously removing phosphorus and nitrogen.

Description

1. Technical field [0001] The invention relates to a method for advanced treatment of slightly polluted source water. 2. Background technology [0002] Biological Aerated Filter (BAF, Biological Aerated Filter) is also called Submerged Biological Aerated Filter (SBAF, Submerged Biological Aerated Filter). Foreign countries began to conduct research in the early 20th century, basically took shape in the late 1980s, and then continued to improve and develop various forms. During the development process, the design ideas of the contact oxidation method of sewage treatment and the water supply fast filter were fully used for reference, and the characteristics of aeration, high filtration rate, interception of suspended solids, and regular backwashing were integrated. The process principle is that a certain amount of granular filter material with a small particle size is filled in the filter, biofilm grows on the surface of the filter material, the inside of the filter is aerate...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 陈天虎鲍腾陈冬谢晶晶朱承驻
Owner HEFEI UNIV OF TECH
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