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Wall breaking agent for sludge, hydrophobic skeleton, preparation method and sludge reduction method

A sludge and hydrophobic technology, which is applied in the field of wall-breaking agents and hydrophobic frameworks for sludge treatment, and sludge reduction in sewage plants, can solve the problems of high cost of additional carbon sources, few practical applications, and high requirements for operation and management.

Active Publication Date: 2020-06-05
深圳市政水环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] However, there are still some problems in the above improved methods, such as the poor operation stability of the new denitrification process, high requirements for operation and management, and few practical applications; the investment cost of improving the original process is relatively large and the impact on the original process remains to be seen. Further research; the cost of additional carbon sources is high, which increases the overall operating cost of the sewage treatment plant, and the additional carbon sources are also organic resources, which to a certain extent caused a waste of resources

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  • Wall breaking agent for sludge, hydrophobic skeleton, preparation method and sludge reduction method
  • Wall breaking agent for sludge, hydrophobic skeleton, preparation method and sludge reduction method
  • Wall breaking agent for sludge, hydrophobic skeleton, preparation method and sludge reduction method

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preparation example Construction

[0066] The preparation method of the above-mentioned wall-breaking agent embodiment is to use hydroxypropyl chitosan as a targeting agent, 2.2-dibromo-3-cyanopropionamide as an organic bromine fungicide, and decynediol or polyoxygen Vinyl fatty alcohol ether is used as a penetrating agent, glutaraldehyde is used as a crosslinking agent, and it is prepared after compounding in a certain order and proportion. The overall process is simple, no special equipment is needed, the process parameters are easy to control, and the cost is low.

[0067] The present invention also provides a hydrophobic framework, which is prepared by mixing biomass powder or sludge dewatered from a sewage treatment plant with the above-mentioned wall-breaking agent according to the following weight percentages as the filler base material, wherein :

[0068] Biomass powder or sludge after pressure filtration and dehydration in sewage treatment plants: 50-80%; wall breaking agent: 20-50%.

[0069] Specifi...

Embodiment 1

[0089] The sludge used in this example is municipal domestic sludge with an initial moisture content of 95%, an effective volume of the conditioning tank of 100 cubic meters, and a negative pressure of 0.1-0.16 MPa in the circulating pump.

[0090] 1. Experimental object:

[0091] A water purification plant in Shenzhen, covering a total area of ​​20,000m 2 , the sewage treatment scale is 50,000 m 3 / d, using the fast PIPR biochemical sewage treatment process, the effluent water quality meets the first-class A standard of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

[0092] The plant's existing sludge dewatering process uses a thickening tank + plate-and-frame filter press.

[0093] 2. Preparation of sludge wall breaking agent:

[0094] S1 Mix and stir 1 kg of hydroxypropyl chitosan and 40 kg of deionized water to make a mixed solution A with a concentration of 2.5%;

[0095] S2 20 kg of bactericide (1-40% 2.2-dibromo-3-cyanopropion...

Embodiment 2

[0149] The sludge used in this embodiment is the sludge of rivers, rivers and lakes, the initial water content is 90%, and the suction pressure of the circulation pump is negative pressure 0.1-0.16Mpa.

[0150] The steps of reducing the amount of water-containing sludge in this embodiment:

[0151] S1 Mix 1 kg of hydroxypropyl chitosan and 10 kg of deionized water to make a mixed solution A with a concentration of 10%;

[0152] S2 30kg of bactericide (2.2-dibromo-3-cyanopropionamide of 1-40%), decynediol 1kg deionized water 139kg are evenly stirred to make (2.2-dibromo-3-cyanide of 21.42% concentration propionamide) mixed solution B;

[0153] S3 A mixed solution 11kg (10% concentration of hydroxypropyl chitosan aqueous solution) and B mixed solution (2.2-dibromo-3-cyanopropionamide of 21.42% concentration) 170kg are evenly stirred to make mixed solution C;

[0154] S4 Add 0.5kg of 1,2-pentanediol with a concentration of 1-10% to the mixed solution C in parts by weight, stir ...

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Abstract

The invention provides a wall breaking agent for sludge and a preparation method of the wall breaking agent. The wall breaking agent is prepared by compounding a targeting agent, a bactericide, a penetrating agent and a cross-linking agent in sequence and proportion. According to the provided hydrophobic skeleton and preparation method, biomass powder or treated modified dry sludge is used as a filler base material, and the wall breaking agent is dried and loaded on the filler base material to be mixed and prepared. The invention also provides a sludge reduction method for a sewage plant, which comprises the following steps: increasing the solid content of water-containing sludge to 4-5%, adding the wall breaking agent, adding a hydrophobic skeleton, uniformly stirring them, carrying out areaction process, carrying out pressure filtration dehydration on the obtained mixed liquid to obtain sludge cake with the water content of 45-48%, carrying out mud cake recovery, outward transport landfill or incineration, or selection of a part of sludge as a filler base material in the hydrophobic skeleton, and recycling a filter pressing liquid as a carbon source for a sewage treatment system. According to the method, the floc structure of the sludge can be fully destroyed, the water content of the dewatered water-containing sludge is reduced with low energy consumption and cost, microorganisms can be killed, odor can be removed, toxic substances in the sludge can be adsorbed, and treated solids and liquid can be recycled.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment in urban domestic sewage plants, and in particular relates to a wall-breaking agent and a hydrophobic framework for sludge treatment, a wall-breaking agent and a hydrophobic framework, and a method for reducing sludge in a sewage plant by using the wall-breaking agent and a hydrophobic framework . Background technique [0002] At present, the landfill capacity of my country's waste landfill plants is becoming increasingly saturated, and the secondary pollution caused by improper sludge treatment and disposal is serious. The current situation of sludge treatment and disposal in my country is quite severe. The existing technologies have their own shortcomings and problems. Sanitary landfill consumes a lot of land and transportation costs, and pollutes the environment around the sludge landfill; sludge incineration requires high infrastructure investment and operating costs, and the process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/147C02F11/122C02F11/12
CPCC02F11/147C02F11/122C02F11/12C02F2303/06
Inventor 彭云龙刘娟李玉山陈兆勇
Owner 深圳市政水环境技术有限公司
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