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Composite flocculating agent for sewage treatment and preparation process thereof

A composite flocculant and sewage treatment technology, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of inability to achieve fast flocculation treatment, accelerated flocculation rate, long settling time, etc. question

Inactive Publication Date: 2019-04-02
武汉科创伟业生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a composite flocculant for sewage treatment and its preparation process, which solves the problem that the existing flocculants have slow flocculation and long settling time, which cannot be realized in the process of hydrolysis flocculation. By adding activated carbon with strong physical adsorption capacity to speed up the flocculation rate, it is impossible to achieve the purpose of rapid flocculation treatment of sewage in sewage by using hydrolysis adsorption and physical adsorption at the same time, and it is impossible to achieve the main purpose of organic flocs to avoid damage. The treated water causes secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] S1. First, pour 25 parts of the selected activated carbon particles into the grinder, fully squeeze and grind through the rolling wheel in the grinder, and sieve and filter through the 110-mesh screen at the bottom of the grinder, so that after grinding, it meets the sieve. The activated carbon powder with the mesh size is sieved through the sieve and collected, and the activated carbon particles that do not reach the sieve size of the sieve continue to be ground in the grinder until they pass through the sieve, and the activated carbon powder with the required particle size can be obtained;

[0024] S2. Pour the selected 15 parts of chitosan and 15 parts of pectin into the mixing mixer, and stir for 35 minutes at a speed of 600r / min and a temperature of 33°C to complete the premix, then add 7 parts of isopropanol and Stir 0.7 parts of polyacrylamide at a speed of 800r / min for 1.5h to fully stir and mix chitosan, pectin, isopropanol and polyacrylamide to obtain an organi...

Embodiment 2

[0028] S1. First, pour 20 parts of the selected activated carbon particles into the grinder, fully squeeze and grind through the rolling wheel in the grinder, and sieve and filter through the 100-mesh screen at the bottom of the grinder, so that after grinding, it meets the requirements of the sieve. The activated carbon powder with the mesh size is sieved through the sieve and collected, and the activated carbon particles that do not reach the sieve size of the sieve continue to be ground in the grinder until they pass through the sieve, and the activated carbon powder with the required particle size can be obtained;

[0029]S2. Pour the selected 10 parts of chitosan and 10 parts of pectin into the mixing mixer, and stir for 30 minutes at a speed of 500r / min and a temperature of 25°C to complete the premix, then add 5 parts of isopropanol and Stir 0.5 parts of polyacrylamide at a speed of 700r / min for 1 hour to fully stir and mix chitosan, pectin, isopropanol and polyacrylamid...

Embodiment 3

[0033] S1. First, pour 30 parts of the selected activated carbon particles into the grinder, fully squeeze and grind through the rolling wheel in the grinder, and sieve and filter through the 120-mesh screen at the bottom of the grinder, so that after grinding, it meets the sieve. The activated carbon powder with the mesh size is sieved through the sieve and collected, and the activated carbon particles that do not reach the sieve size of the sieve continue to be ground in the grinder until they pass through the sieve, and the activated carbon powder with the required particle size can be obtained;

[0034] S2. Pour the selected 20 parts of chitosan and 20 parts of pectin into the mixing mixer, and stir for 40 minutes at a speed of 700r / min and a temperature of 40°C to complete the premix, then add 8 parts of isopropanol and Stir 1 part of polyacrylamide at a speed of 900r / min for 2 hours to fully stir and mix chitosan, pectin, isopropanol and polyacrylamide to obtain an organi...

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Abstract

The invention discloses a composite flocculating agent for sewage treatment and a preparation process thereof. The composite flocculating agent comprises the following raw materials in parts by weight: 20-30 parts of activated carbon, 10-20 parts of chitosan, 0.5-1 part of polyacrylamide, 5-7 parts of polymeric zinc chloride, 10-20 parts of pectin, 1-5 parts of ferric oxide, 1-5 parts of magnesiumsulfate, 5-8 parts of isopropyl alcohol and 1-5 parts of flocculation aid, wherein the flocculation aid is one or a combination of calcium hydroxide, calcium chloride and bone glue. The invention relates to the technical field of sewage treatment. According to the sewage treatment composite flocculating agent and the preparation process thereof, the flocculation rate is accelerated by adding activated carbon with strong physical adsorption capacity in a hydrolyzing flocculation process, the purpose of rapid flocculation treatment of pollutants in sewage by using hydrolysis adsorption and physical adsorption simultaneously is well achieved, the flocculation speed of the flocculating agent is greatly accelerated, the sedimentation time is shortened, and at the same time, the composite flocculating agent mainly employs organic flocculation substances, thereby avoiding secondary pollution to treated water.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite flocculant for sewage treatment and a preparation process thereof. Background technique [0002] Flocculant is a key factor in the flocculation process of sewage treatment. The choice of flocculant directly determines the final flocculation effect. Flocculants mainly include inorganic flocculants, organic flocculants and microbial flocculants. Inorganic flocculants include aluminum sulfate and aluminum chloride. , ferric sulfate, ferric chloride, etc. Commonly used aluminum salts include aluminum sulfate AL2(SO4)3·18H2O and alum AL2(SO4)3·K2SO4·24H2O, and the other type of iron salt is ferric chloride hydrate FeCL3·6H2O .Ferrous sulfate hydrate FeSO4·17H2O and ferric sulfate, organic polymer flocculants have two categories of natural polymers and synthetic polymers, which can be divided into the following three types from the chemical structure: (1) polyamine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54C02F1/56C02F1/28
CPCC02F1/283C02F1/5236C02F1/5245C02F1/5263C02F1/54C02F1/56
Inventor 杜冠男杜汉杰刘明娟
Owner 武汉科创伟业生物科技有限公司
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