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A spherical composite adsorbent for sewage treatment

A composite adsorption and sewage treatment technology, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor heavy metal adsorption capacity, slow sedimentation rate, single function, etc. Improve chelation adsorption capacity, not easy to secondary pollution, improve the effect of sedimentation rate

Active Publication Date: 2022-01-07
浙江省环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Adsorption is a technology widely used in sewage treatment at present. The current adsorption materials mainly include activated carbon adsorption, bentonite adsorption, attapulgite adsorption and macroporous adsorption resin adsorption, etc., which mainly use large specific surface area and high porosity , surface charge, etc. to adsorb organic matter, pigments, heavy metals and other pollutants in sewage by physical means, which has a certain adsorption effect, but has the disadvantages of high price, single function, poor adsorption and removal effect, slow sedimentation rate, and large amount of sludge And other issues
[0004] As a kind of water treatment filter material, quartz sand has strong hydrophilicity, and has the characteristics of no impurities, high density, high mechanical strength, strong pollution interception ability and long service life, but it mainly relies on van der Waals force and electrostatic force Realize the adsorption of suspended particles in the water body, reduce the turbidity of the water body, and have poor adsorption capacity for heavy metals
[0005] Polyacrylamide is often used as a flocculant in a sewage treatment system. It can effectively remove suspended solids and soluble chemical oxygen consumption (COD) and biological oxygen consumption (BOD) through adsorption and flocculation, so as to achieve the purpose of purifying sewage , but its removal efficiency for dissolved heavy metals is low

Method used

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  • A spherical composite adsorbent for sewage treatment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A spherical composite adsorbent for sewage treatment, which is prepared from the following raw materials in parts by weight: 8 parts of lignin, 6 parts of mercapto-modified polyacrylamide, 2 parts of sodium alginate, and 30 parts of mercapto-modified quartz sand With 30 parts of sepiolite, its concrete preparation steps are as follows:

[0039] 1) dissolving the lignin in the above parts by weight in deionized water to prepare a lignin solution with a concentration of 15% by mass;

[0040] 2) Mix and stir the mercapto-modified polyacrylamide aqueous solution and the sodium alginate aqueous solution evenly, raise the temperature to 50° C. for 1 hour, and then cool to room temperature;

[0041] 3) Mix and stir the solutions in step 1) and step 2) evenly to obtain a mixed solution A, add a mixture of sepiolite and mercapto-modified quartz sand to the mixed solution A, stir evenly, and obtain a semi-solid mixed product;

[0042] 4) Extrude the semi-solid mixed product of ste...

Embodiment 2

[0055] A spherical composite adsorbent for sewage treatment is prepared from the following raw materials in parts by weight: 9 parts of lignin, 7.5 parts of mercapto-modified polyacrylamide, 2.5 parts of sodium alginate, 35 parts of mercapto-modified quartz and 25 parts of sepiolite, the specific preparation steps are as follows:

[0056] 1) dissolving the lignin in the above parts by weight in deionized water to form a lignin solution with a concentration of 18% by mass;

[0057] 2) Mix and stir the mercapto-modified polyacrylamide aqueous solution and the sodium alginate aqueous solution evenly, raise the temperature to 50° C. for 2 hours, and then cool to room temperature;

[0058] 3) Mix and stir the solutions in step 1) and step 2) evenly to obtain a mixed solution A, add a mixture of sepiolite and modified quartz sand to the mixed solution A, stir evenly, and obtain a semi-solid mixed product;

[0059] 4) Extrude the semi-solid mixed product of step 3) to produce spheri...

Embodiment 3

[0073] A spherical composite adsorbent for sewage treatment, which is prepared from the following raw materials in parts by weight: 10 parts of lignin, 9 parts of mercapto-modified polyacrylamide, 3 parts of sodium alginate, and 40 parts of mercapto-modified quartz sand With 20 parts of sepiolite, the concrete preparation steps are as follows:

[0074] 1) dissolving the lignin in the above parts by weight in deionized water to prepare a lignin solution with a concentration of 20% by mass;

[0075] 2) Mix and stir the mercapto-modified polyacrylamide aqueous solution and the sodium alginate aqueous solution evenly, raise the temperature to 80° C. for 1 hour, and then cool to room temperature;

[0076] 3) Mix and stir the solutions in step 1) and step 2) evenly to obtain a mixed solution A, add a mixture of sepiolite and mercapto-modified quartz sand to the mixed solution A, stir evenly, and obtain a semi-solid mixed product;

[0077] 4) Extrude the semi-solid mixed product of ...

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Abstract

The invention relates to the field of sewage treatment and aims to provide a spherical composite adsorbent for sewage treatment. The spherical composite adsorbent disclosed by the present invention is composed of 8-10 parts of lignin, 6-9 parts of mercapto-modified polyacrylamide, 2-3 parts of sodium alginate, 30-40 parts of mercapto-modified quartz sand and 20-30 parts prepared from sepiolite. This kind of spherical composite adsorbent has the function of adsorbing and removing organic matter, suspended solids and heavy metals in sewage, and still has a good removal effect on heavy metals in acidic sewage, and has the function of integration of adsorption-flocculation-sedimentation. The contents of COD, SS, lead, cadmium, copper and mercury in the sewage have reached the requirements of the national standard of the People's Republic of China, the surface water environmental quality standard GB3838-2002, and the removal rate of heavy metals in acidic heavy metal heavily polluted wastewater has reached more than 99%. .

Description

technical field [0001] The invention belongs to the field of waste water and sewage treatment and purification, and in particular relates to a spherical composite adsorbent for sewage treatment. Background technique [0002] With the improvement of people's living standards and the acceleration of urbanization, industrial wastewater and urban sewage are discharged randomly, resulting in a gradual increase in the output of sewage. Pollutants in wastewater usually include organic pollutants and inorganic pollutants. Inorganic pollutants are polluted by heavy metals. Mainly, phenols, organic dyes, lead, cadmium, mercury, copper, etc. in wastewater are often highly toxic and pose a threat to our health. Research on sewage treatment technology has always attracted attention. [0003] Adsorption is a technology widely used in sewage treatment at present. The current adsorption materials mainly include activated carbon adsorption, bentonite adsorption, attapulgite adsorption and ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/52C02F1/54C02F1/56C02F101/20C02F101/30
CPCB01J20/10B01J20/103B01J20/22B01J20/24C02F1/281C02F1/285C02F1/286C02F1/5236C02F1/5263C02F1/54C02F1/56B01J20/261C02F2101/20C02F2101/30B01J2220/4806B01J2220/46B01J2220/4825B01J2220/4812
Inventor 刘华
Owner 浙江省环境科技有限公司
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