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Graded biological filter medium, preparation method thereof, and graded biological filter system

A technology of biological filtration and biological filtration tank, applied in the direction of sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of high cost of filler, unstable pollutant removal effect, and inability to meet various water quality indicators And other issues

Active Publication Date: 2021-06-15
CHINA MACHINERY INT ENG DESIGN & RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a graded biological filter medium and its preparation method, and a graded biological filter system to solve the problem of unstable pollutant removal effect of the existing treatment of initial rainwater and / or combined overflow sewage, which cannot adapt to the initial rainwater and sewage in our country. / Or the characteristics of the overflow sewage change in the combined system, the treatment method is single, cannot meet the various indicators of water quality, and the cost of the filler used is high, so it is impossible to realize the technical problems of popularization and application

Method used

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  • Graded biological filter medium, preparation method thereof, and graded biological filter system
  • Graded biological filter medium, preparation method thereof, and graded biological filter system
  • Graded biological filter medium, preparation method thereof, and graded biological filter system

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preparation example Construction

[0047] According to another aspect of the present invention, there is also provided a method for preparing the above-mentioned graded biological filter medium, a method for preparing a bioretention composite media filler, comprising the following steps:

[0048] S1: Clean the zeolite, soak the zeolite in water for more than 48 hours, take out the zeolite and dry it after detecting that the concentration of pollutants in the water does not increase after soaking;

[0049] S2: Soak the coconut bran that has been removed from the coconut shell in water, drain the remaining water when the volume expands to 3 to 4 times, then rinse the coconut bran while draining, wash repeatedly at least 3 times to remove the salt, and dry;

[0050] S3: stirring and mixing the zeolite obtained in step S1 and the coconut peat obtained in step S2 with coarse sand, fine sand, and planting soil to obtain a bioretention composite medium filler;

[0051] The preparation method of the biological filter f...

Embodiment 1

[0064] Graded biofiltration media, including: biofiltration media for primary treatment of primary stormwater and / or combined overflow, and secondary treatment of primary treated primary stormwater and / or combined overflow The bio-retention composite media packing of high-grade treatment, the bio-filtration packing includes volcanic rock, the average particle size of the volcanic rock is 15mm, the mud content is 9.5m 2 / g, hydrochloric acid soluble rate -5 m / s, stable infiltration rate ≥ 2.2×10 -5 m / s, pH is 6.3, organic matter loss on ignition (LOI) is 3.2%, zeolite particle size is 4mm; coarse sand average particle size is 0.8mm, fineness modulus is 3.5; fine sand average particle size is 0.3mm, The fineness modulus is 2; the penetration capacity of the planting soil is >3.5×10 -6 m / s, organic matter content > 5%, pH value 7.1, cation exchange capacity > 5mep / 100g; coconut bran pH value is 5.5, coconut bran EC value conductivity is 0.6.

[0065] The preparation method of g...

Embodiment 2

[0073] Graded biofiltration media, including: biofiltration media for primary treatment of primary stormwater and / or combined overflow, and secondary treatment of primary treated primary stormwater and / or combined overflow The bio-retention composite media packing of high-grade treatment, the bio-filtration packing includes volcanic rock, the average particle size of volcanic rock is 13mm, the mud content is 9.5m 2 / g, hydrochloric acid soluble rate -5 m / s, stable infiltration rate ≥ 2.2×10 -5 m / s, pH is 6.3, organic matter loss on ignition (LOI) is 3.2%, zeolite particle size is 3mm; coarse sand average particle size is 0.8mm, fineness modulus is 3.5; fine sand average particle size is 0.3mm, The fineness modulus is 2; the penetration capacity of the planting soil is >3.5×10 -6 m / s, organic matter content > 5%, pH value 7.1, cation exchange capacity > 5mep / 100g; coconut bran pH value is 6, coconut bran EC value conductivity is 0.75.

[0074] The preparation method of the gr...

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Abstract

The invention discloses a graded biological filter medium, a preparation method thereof, and a graded biological filter system, comprising: a biological filter filler used for primary treatment of initial rainwater and / or combined overflow sewage, and a biological filter filler used for treating a Bio-retention composite media fillers for secondary treatment of primary rainwater and / or combined overflow sewage, bio-filtration fillers include volcanic rocks; bio-retention composite media fillers include the following mass percentages: zeolite 3% to 10%, coarse sand 50% %~60%, fine sand 10%~15%, planting soil 20%~25%, coconut peat 2%~8%. The graded biological filter medium of the present invention includes a biological filter filler for primary treatment of initial rainwater and / or combined overflow sewage and a bioretention composite medium filler for secondary treatment, which can ensure that after the treatment of the graded biological filter medium The quality of the effluent water can be improved, and it can avoid the blockage of the bioretention composite media filler due to excessive load.

Description

technical field [0001] The invention relates to the fields of sponge city construction and low-impact development, in particular, a graded biological filter medium. In addition, the present invention also relates to a preparation method comprising the above-mentioned graded biological filter medium, and a graded biological filter system. Background technique [0002] In recent years, China's water pollution control has been increasing, but the trend of water pollution deterioration has not been fundamentally curbed. At the same time, with the effective control of point source pollution, initial rainwater and combined overflow sewage (CSO for short) The problem of non-point source pollution brought about by ect. has attracted more and more attention in our country. After national promotion and publicity, the concept of using low-impact development technology to treat rainwater has been accepted by more and more people. At present, the treatment methods of non-point source p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10C02F3/30C02F3/32C02F3/34C02F101/10C02F101/16
CPCC02F1/281C02F3/105C02F3/302C02F3/32C02F3/34C02F2101/105C02F2101/16C02F2103/001C02F2301/08Y02W10/10
Inventor 贺卫宁马晶伟陆先镭林潇吴羽璇施周陈蕃王莉
Owner CHINA MACHINERY INT ENG DESIGN & RES INST
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