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A kind of iron-silicon bio-enzyme magnetic composite material for sludge dehydration and its synthesis method

A magnetic composite material, sludge dewatering technology, applied in water/sludge/sewage treatment, sludge treatment, biological sludge treatment, etc., can solve the problems of general dehydration effect, long reaction time, difficult enzyme recovery, etc. The effect of low operating cost, improved activity and stability, and efficient resource recycling

Active Publication Date: 2022-02-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Chinese patent application No. 201010523517.0 discloses the application of a biological enzyme in sludge dewatering. The enzyme is compounded from sludge components, but there are problems such as difficult enzyme recovery, poor activity, poor stability, long reaction time, and general dehydration effect. question

Method used

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  • A kind of iron-silicon bio-enzyme magnetic composite material for sludge dehydration and its synthesis method
  • A kind of iron-silicon bio-enzyme magnetic composite material for sludge dehydration and its synthesis method
  • A kind of iron-silicon bio-enzyme magnetic composite material for sludge dehydration and its synthesis method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Pilot test in a sewage treatment plant. According to Table 1 sludge composition. at 1m 3 , the water content is 90% ~ 95% sludge, add 10g ~ 100g magnetic iron silicon @ biological enzyme compound enzyme (magnetic iron silicon @ laccase 2 ~ 2.5 parts, magnetic iron silicon @ lysozyme 2 ~ 2.5 parts, magnetic iron silicon @ lysozyme 2 ~ 2.5 parts, magnetic iron silicon @ lysozyme Silicon @ pectinase 2-2.5 parts, magnetic iron silicon @ protease 2-3 parts, magnetic iron silicon @ lipase 1-2 parts, magnetic iron silicon @ cellulase 0.5-1 part). A 5.5W stirrer was used to stir for 10 minutes, and the mixed solution was left to stand for 30 minutes to 2 hours to realize the separation of mud and water. ② The separated water enters the front end of the sewage treatment system; the separated solid and polymer flocculant are stirred (11W) for 10 minutes at a ratio of 1:1000-10000, and then enter the filter press system. The moisture content of the sludge after pressure filtrat...

Embodiment 2

[0046] The laboratory completes the small test. According to Table 2 sludge composition. at 1m 3, with a water content of 90% to 95%, add 10g to 100g of magnetic ferrosilicon@biological enzyme compound enzyme (2 to 3 parts of magnetic ferrosilicon@lysozyme, 2 to 3 parts of magnetic ferrosilicon@protease, 2 to 3 parts of magnetic ferrosilicon@protease, 2-2.5 parts of @pectinase, 2-2.5 parts of magnetic iron silicon @ protease, 1-2 parts of magnetic iron silicon @ lipase, 1-2 parts of magnetic iron silicon @ cellulase). A 5.5W stirrer was used to stir for 30 minutes, and the mixed solution was left to stand for 30 minutes to 2 hours to realize the separation of mud and water. ② The separated water enters the front end of the sewage treatment system; the separated solid and polymer flocculant are stirred (11W) for 10 minutes at a ratio of 1:1000-10000, and then enter the filter press system. The moisture content of the sludge after pressure filtration is between 37.8% and 50.2...

Embodiment 3

[0050] The laboratory completes the small test. According to Table 3 sludge composition. In 0.3m3 sludge with a moisture content of 90% to 95%, add 10g to 100g of magnetic ferrosilicon@biological enzyme compound enzyme ((magnetic ferrosilicon@lysozyme 2~2.5 parts, magnetic ferrosilicon@pectinase 2~ 2.5 parts, 2-3 parts of magnetic ferrosilicon@protease, 1-2 parts of magnetic ferrosilicon@lipase, 1-2 parts of magnetic ferrosilicon@cellulase). Stir with a 5.5W stirrer for 10min, and let the mixture stand After 30 minutes to 2 hours, the separation of mud and water is realized. ②The separated water enters the front end of the sewage treatment system; the separated solid and polymer flocculant are stirred (11W) for 10 minutes according to the ratio of 1:1000~10000, and enter the filter press system. The water content of the filtered sludge is between 28.7% and 60.1%, and the activity of the enzyme after ten repetitions is 67.8%.

[0051] Table 3 Sludge components in the sludge t...

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Abstract

The invention discloses an iron-silicon bio-enzyme magnetic composite material for sludge dewatering and a synthesis method. It specifically relates to the synthesis of iron-silicon materials, the compounding of biological enzymes and its application in sludge dewatering. The present invention comprises the following steps: (1) synthesis of iron-silicon material: (2) immobilization of different biological enzymes on the iron-silicon material (magnetic iron-silicon@biological enzyme composite material); Silicon@biological enzyme composite material for compounding; (4) The compounded magnetic iron-silicon@biological enzyme composite material is used for sludge dewatering. The purpose of the invention is to improve the efficiency of biological enzymes in sludge dewatering and the recycling and reuse of composite materials. The invention realizes efficient sludge reduction and resource recycling on the premise of not increasing the solid content of sludge dehydration.

Description

technical field [0001] The invention relates to the technical fields of sludge dehydration treatment, heavy metal wastewater treatment and solid waste resource utilization, in particular to an iron-silicon bio-enzyme magnetic composite material for sludge dehydration and a synthesis method. Background technique [0002] Sludge includes municipal sludge, industrial sludge, river silt and other mud-water mixtures produced by microorganisms as the main body participating in water purification. [0003] Sludge is composed of water, organic matter, microorganisms, inorganic particulate impurities, colloids and other substances. The moisture content of the sludge is about 90-99.5%. The content of EPS secreted by microorganisms accounts for 50% to 90% of the organic matter content, and EPS has a highly hydrophilic gel-like structure, which will lead to the aggregation of fine particles in sludge to form flocs. [0004] Currently, sludge treatment and disposal methods mainly inclu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/12C02F11/02C02F11/122C02F11/14
CPCC02F11/12C02F11/02C02F11/122C02F11/14
Inventor 宿新泰万娟娟林璋刘学明张丽娟
Owner SOUTH CHINA UNIV OF TECH