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Fixed microbial carrier material for processing organic wastewater

A technology of organic wastewater treatment and microbial carrier, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of short service life, complicated preparation process, easy disintegration, etc., to achieve Wide heat-resistant temperature range, good acid-base stability, and good thermal stability

Inactive Publication Date: 2010-05-19
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing immobilization carriers generally have some problems: low mechanical strength of the carrier, easy disintegration, short service life, poor bio-affinity of the carrier, small biomass, weak bio-immobilization, high cost of materials, complicated preparation process, etc., which also lead to immobilization. Microbial technology has not been widely used in the treatment of actual wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select 20g of 20-40 mesh bentonite and mix it into 200mL of CMC solution (CMC mass concentration 1%), add 20mL of Fusarium suspension (absorbance at 600nm is 1.05-1.25), stir at 400rpm at high speed for 20min, drop into 300mL of AlCl with a mass concentration of 2% 3 The solution was cross-linked for 2 hours, washed with water, immersed in water, and left for 1 day for later use.

[0021] The prepared immobilized microorganism carrier material has a density of 1.10×10 3 kg·m -3 , the water absorption multiple is 7.50, the thermal stability is good in the temperature range of 10 ℃ ~ 80 ℃, and the acid and alkali stability is good in the range of pH 2 ~ 12. The immobilized microbial carrier material has good mass transfer performance. When p-chlorophenol diffuses from the outside to the inside, the diffusion coefficient D 1 =0.96×10 4 cm 2 min -1 , when p-chlorophenol diffuses from inside to outside, D 2 =2.01×10 4 cm 2 min -1 .

[0022] Take wet weight 10g imm...

Embodiment 2

[0024] Select 20 g of 100-mesh bentonite and mix it in 300 mL of CMC solution (CMC mass concentration 3%), place it, add 20 mL of Fusarium suspension (absorbance at 600 nm is 1.05 to 1.25), stir at 400 rpm for 20 min at high speed, and drop it into 300mL of AlCl with a mass concentration of 2.5% 3 After cross-linking in the solution for 1 hour, wash with water, soak in water, and stand for 1 day before use.

[0025] The prepared immobilized microorganism carrier material has a density of 1.20×10 3 kg·m -3 , the water absorption multiple is 12.0, the thermal stability is good in the temperature range of 10 ℃ ~ 80 ℃, and the acid and alkali stability is good in the range of pH 2 ~ 12. The immobilized microbial carrier material has good mass transfer performance. When p-chlorophenol diffuses from the outside to the inside, the diffusion coefficient D 1 =1.26×10 4 cm 2 min -1 , when p-chlorophenol diffuses from inside to outside, D 2 =3.21×10 4 cm 2 min -1 .

[0026] Ta...

Embodiment 3

[0028] Select 20 g of 40-60 mesh bentonite and mix it in 400 mL of CMC solution (CMC mass concentration 2%), add 20 mL of Fusarium suspension (absorbance at 600 nm is 1.05 to 1.25), stir at 400 rpm for 20 min at high speed, and drop into 400mL of AlCl with a mass concentration of 2% 3 After cross-linking in the solution for 2 hours, add water to wash, soak in water, and stand for 1 day before use.

[0029] The prepared immobilized microorganism carrier material has a density of 1.05×10 3 kg·m -3 , the water absorption multiple is 10.50, the thermal stability is good in the temperature range of 10 ℃ ~ 80 ℃, and the acid and alkali stability is good in the range of pH 2 ~ 12. The immobilized microbial carrier material has good mass transfer performance. When p-chlorophenol diffuses from the outside to the inside, the diffusion coefficient D 1 =1.32×10 4 cm 2 min -1 , when p-chlorophenol diffuses from inside to outside, D 2 =3.35×10 4 cm 2 min -1 .

[0030] Take wet we...

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Abstract

The invention relates to a fixed microbial carrier material for processing organic wastewater, which is prepared from bentonite, solution of sodium carboxymethylcellulose and AlCl3 solution through a crosslinking reaction at room temperature, wherein the mass ratio of the bentonite to the solution of sodium carboxymethylcellulose is 1:10 to 1:30, the volume ratio of the AlCl3 solution to the solution of sodium carboxymethylcellulose is 1:1 to 1.6:1, the mass concentration of the solution of sodium carboxymethylcellulose is 0.5 to 3 percent, and the mass concentration of the AlCl3 solution is 1 to 3 percent. The fixed microbial carrier material for processing the organic wastewater has the advantages of low cost, easy sediment in water and good thermostability, excellent mass transfer performance, absorption performance and biological affinity.

Description

(1) Technical field [0001] The invention relates to an immobilized microorganism carrier material for treating organic waste water. (2) Background technology [0002] Immobilized microorganism technology is to locate free cells or microorganisms in a limited space area by chemical or physical means, so that they can keep active and can be used repeatedly. It is an environmentally friendly technology that has developed rapidly since the 1960s. [0003] In the late 1970s, with the increasingly serious environmental pollution, the demand for research on efficient microbial treatment pollution systems became increasingly urgent. Under this background, immobilized microorganism technology has developed rapidly, and the application research in wastewater biological treatment is also increasing day by day. Immobilized microorganisms, due to the strong resistance produced by the high density or the blocking effect of the carrier covering, weaken the impact of toxic and harmful sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00
Inventor 李济吾蔡伟建朱凌
Owner ZHEJIANG GONGSHANG UNIVERSITY
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