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Polyurethane base biological fixing carrier and sewage treating method

An immobilized carrier and biological technology, applied in the direction of biological water/sewage treatment, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve the problems of compound functional biological immobilized carriers that have not yet appeared

Inactive Publication Date: 2005-03-02
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But so far, there is no biological immobilization carrier that combines polyurethane, activated carbon, and chitosan in the prior art and has composite functions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027] Treatment of Coking Sewage Using Chitosan Crosslinked Activated Carbon Polyurethane Biological Immobilization Carrier

[0028] Fill the biological aerated filter with 2 / 3 of the above-mentioned carrier, and add high-efficiency microbial flora B350 (B350 contains 28 kinds of special microorganisms, cellulase, amylase, lipase and hydrolytic enzyme, and the bulk density is 0.6-0.8g / cm3, the number of microorganisms is 3-5 billion / g). Microporous aeration pipes are laid on the bottom of the pool to aerate the system. Table 1 is the result of running for 90 days.

[0029]

[0030] It can be seen from Table 1 that the effluent results are better than the first-level discharge standards (COD≤100mg / L, ammonia nitrogen≤15mg / L, volatile phenol≤0.5mg / L, SS≤70mg / L, chromaticity≤50 times, pH value is 6-9).

example 2

[0032] Treatment of Wastewater from Organic Chemical Plants Using Chitosan Cross-linked Activated Carbon as Polyurethane Biological Immobilization Carrier

[0033] The wastewater from an organic chemical factory with rubber additives as its main product mainly contains 16 pollutants that are resistant to biodegradation and are toxic to organisms, such as nitrobenzene, nitrophenol, aniline, phenprozole, and morpholine. , the maximum COD is 14400mg / L, the ammonia nitrogen is 70-110mg / L, the nitrobenzene is 120mg / L, and the aniline is 700mg / L. Using the carrier of the present invention, adding microbial flora B350, the waste water is aerated, the effluent is fully up to the standard, the removal rate of main pollutant COD reaches 94.7%, and the removal rate of ammonia nitrogen reaches 99.5%. Table 2 shows the test results of the environmental protection monitoring station for 30 days.

[0034] Table 2 Treatment results of organic chemical wastewater from rubber additiv...

example 3

[0044] Treatment of Paper Mill Wastewater Using Chitosan Crosslinked Activated Carbon Polyurethane Bioimmobilization Carrier

[0045] The main COD substances in paper mill wastewater are cellulose, hemicellulose and lignin which is toxic and biodegradable. Paper mill wastewater is a typical high-concentration, refractory organic wastewater. The chitosan cross-linked activated carbon polyurethane biological immobilization carrier system is used to treat the paper mill wastewater. ). Table 3 is the test report of the environmental monitoring station for 60 days.

[0046] Table 3 Paper mill wastewater treatment results (unit: mg / L)

[0047] Item Inlet Water Outlet Removal Rate

[0048] COD Max 6900 430 93.8%

[0049] (mg / L) Minimum 2020 189 91%

[0050] Average 4300 280 93.4%

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PUM

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Abstract

The present invention discloses one kind of polyurethane base biological immobile carrier. The carrier has three kinds of structures: macroporous polyurethane network; polyurethane cross-linked chitosan and coated active carbon; and microporous network formed with chitosan and cross-linked glutaraldehyde, chloropropylene oxide or chloroacetic acid. These three kinds of network interpenetrate to form the polymer capable of fixing bioactive molecule. The carrier of the present invention has the features of coexisting macropores and micropores, coexisting hydrophilicity and reaction property, coexisting powerful adsorption and strong polarity, high biological bearing capacity, good compatibility, high physical, chemical and mechanical performance, etc., and is suitable for various bioreactors for treating sewage.

Description

technical field [0001] The invention relates to a bio-immobilization carrier, more specifically, the invention relates to a polyurethane-based bio-immobilization carrier combined with chemical adsorption and cross-linking reaction. Background technique [0002] At present, with the continuous improvement of environmental protection and sustainable development requirements, there are many ways to recycle wastewater, one of which is water treatment biological reaction, and water treatment biological reaction needs to use to bioreaction vectors. [0003] The carrier carrying microorganisms in the biological reaction is a key material that affects the effect of sewage treatment. Technicians have used slag, bamboo chips, wooden strips, paper, glass, plastic, ceramics, etc. as biological carriers. The structure of the carrier is solid, hollow, corrugated, honeycomb, annular, tree-like, layered, etc., but most of the research on the carrier in the prior art still focuses on increa...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 叶正芳倪晋仁
Owner PEKING UNIV
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