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Novel high-efficiency environment-friendly coagulating agent used for treating turbid water or polluted water

A coagulant and environmentally friendly technology, applied in the field of new high-efficiency and environmentally friendly coagulants, can solve the problems of being easily affected by seasons and climatic conditions, slow biological treatment, etc., and achieve the effect of clear water body, improved self-purification ability, and low price.

Active Publication Date: 2013-10-23
NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biological methods are applied to the treatment of dirty water or polluted water. They are stable, effective, safe and long-lasting, low engineering cost, low operating cost, and can be combined with greening environment and landscape improvement. However, biological methods are slow to take effect and are susceptible to The influence of seasons and climatic conditions, and the effective follow-up management and maintenance of the system are also important issues that need to be solved urgently in the application of biological methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: a kind of high-efficiency environmental protection flocculant, comprises the component of following percentage by weight:

[0012] Bauxite 25%, fly ash 30%, quicklime 35%, zeolite 5%, citric acid 3%, cement 2%; of which:

[0013] In bauxite: the content of aluminum oxide is more than 80%, the content of iron oxide is less than 3%, and it is in the form of gray powder.

[0014] The fly ash adopts secondary fly ash with a density of 3.15kg / m 3 , fineness (0.045mm square hole sieve residue) ≤ 20%, water demand ratio ≤ 105%, loss on ignition ≤ 8%, water content ≤ 1%, sulfur trioxide content ≤ 3%.

[0015] Quicklime is industrial grade quicklime, and its mass content is more than 90%.

[0016] The zeolite is in powder form, and the mass content of silicon dioxide in the zeolite is ≥60%.

[0017] The mass content of citric acid is ≥99%.

[0018] The cement is slag portland cement, P.S.A32.5.

[0019] First, the above-mentioned new high-efficiency environmen...

Embodiment 2

[0020] Embodiment 2: basically the same as Example 1, the difference is the formula and addition of coagulant, specifically as follows: Bauxite 10%, fly ash 40%, quicklime 45%, zeolite 3%, citric acid 1% , Cement 1%.

[0021] The amount of coagulant added is 3% of the dry weight of sludge in dirty water or polluted water.

[0022] The pH value of dirty water or polluted water is 6.9 before being treated by coagulant, and the pH value of water after treatment is 7.1.

Embodiment 3

[0023] Embodiment 3: basically the same as Example 1, the difference is the formula and addition of coagulant, specifically as follows: Bauxite 30%, fly ash 20%, quicklime 32%, zeolite 8%, citric acid 5% , Cement 5%.

[0024] The amount of coagulant added is 5% of the dry weight of sludge in dirty water or polluted water.

[0025] The pH value of dirty water or polluted water is 6.8 before being treated by coagulant, and the pH value of water after treatment is 7.0.

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Abstract

The invention discloses a novel high-efficiency environment-friendly coagulating agent used for treating turbid water or polluted water. The coagulating agent comprises the components of, by weight: 10-30% of bauxite, 20-40% of fly ash, 20-60% of lime, 3-8% of zeolite, 1-5% of citric acid, and 1-5% of cement. The invention also relates to the application of the high-efficiency environment-friendly coagulating agent in treating turbid water or polluted water. The coagulating agent provided by the invention is economical and environment-friendly, and has the advantages of rich component source and low cost. An agent dose is low, wherein the dose is 3-5% of the dry weight of sludge in the turbid water or polluted water. The influence on water body pH value is low, such that the original property of the sludge in the water is not changed. Part of active heavy metal is solidified, such that activity of sludge in water can be increased, and water body self-cleaning capacity can be greatly improved. Multiple functions such as absorption, condensation, chelation, curing, ion exchange, and the like are integrated. A treatment effect is good. Water body after flocculation and sedimentation is clear and transparent, and has no odor.

Description

technical field [0001] The invention relates to a coagulant, in particular to a new high-efficiency and environment-friendly coagulant for treating dirty water or polluted water and its application. Background technique [0002] With the rapid development of economy and the acceleration of urbanization process, the problem of water pollution in my country is becoming more and more serious. The massive discharge of industrial wastewater and domestic sewage has become a common pollution problem faced by many cities in our country, seriously affecting the lives of residents, the image of the city and the ecological environment. At present, the technologies used to treat polluted water or polluted water at home and abroad can be mainly divided into three categories: physical, chemical and biological-ecological methods. Physical methods mainly include filtration, sedimentation, artificial aeration, etc.; chemical methods mainly include enhanced flocculation, chemical oxidation, ...

Claims

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Application Information

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IPC IPC(8): C02F1/54
Inventor 张爱均刘军张建国
Owner NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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