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Coking wastewater advanced treatment agent and application thereof

A coking wastewater and advanced treatment technology, which is applied in the direction of oxidation water/sewage treatment, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of high price and complicated manufacturing process of organic polymer coagulants, and achieve reduction Effects of frictional resistance, improvement of flocculation and settlement conditions, and promotion of floc growth

Inactive Publication Date: 2010-02-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the manufacturing process of organic polymer coagulants is complicated and expensive

Method used

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  • Coking wastewater advanced treatment agent and application thereof
  • Coking wastewater advanced treatment agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The steps of preparing coking wastewater advanced treatment agent are as follows:

[0025] First purchase industrial grade calcium oxide, potassium permanganate, aluminum sulfate, ferric chloride, diatomite (Hangzhou Zhengyang Water Treatment Company), polyacrylamide (PAM). Then measure 5000 parts by weight of CaO and 1 part by weight of KMnO 4 Mix to make modified calcium salt. Then 4 parts by weight of aluminum sulfate, 1 part by weight of ferric chloride and 1 part by weight of diatomite were mixed to prepare the modified aluminum salt. Finally, measure the modified calcium salt: modified aluminum salt: polyacrylamide = 200:400-600:1 by weight to form the coking wastewater advanced treatment agent.

Embodiment 2

[0027] The advanced treatment agent for coking wastewater prepared in Example 1 was used for advanced treatment of coking wastewater in a coking plant, and the effect was compared with other coagulants.

[0028] Weigh 5g each of the modified calcium salt and the modified aluminum salt, add water to prepare a 5% by weight solution; weigh 0.5g of polyacrylamide, add water to prepare a 0.1‰wt% solution.

[0029] The coking wastewater from the coking plant is measured. The water quality of the coking wastewater after biochemical treatment is as follows: COD is 300-400 mg / L, and chroma is 150-250 times. Add the coking wastewater advanced treatment agent to the coking wastewater, and the dosage is modified calcium salt 100mg / L coking wastewater, modified aluminum salt 250mg / L coking wastewater, polyacrylamide 0.5mg / L coking wastewater, using enhanced coagulation. Advanced treatment (the average water temperature is 27°C, the pH of the water sample is about 7.5), and finally the COD ...

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Abstract

The invention discloses a coking wastewater advanced treatment agent and an application thereof, which belong to a coking wastewater advanced treatment agent component and a using method. The coking wastewater advanced treatment agent consists of 200 portions by weight of modified calcium salt, 400-600 portions by weight of modified aluminum salt and 1 portion by weight of polyacrylamide, whereinthe modified calcium salt is formed by mixing 4 portions by weight of aluminium sulphate, 1 portion by weight of ferric trichloride and 1 portion by weight of purified diatomite. The modified calciumsalt and the modified aluminum salt are respectively prepared into 5 percent of solution and the polyacrylamide is prepared into 0.01 percent of solution, then the 5 percent of solution and the 0.01 percent of solution are added into coked wastewater of which COD is 300-400mg / L and the chroma is 150-250 times after biochemical treatment, wherein the addition quantity of the modified calcium salt is 100mg / L, the addition quantity of the modified aluminum salt is 250mg / L and the addition quantity of the polyacrylamide is 0.5mg / L; the coking wastewater after reinforcing and coagulation reaches national primary emission standard, the COD is less than 100mg / L, the removing rate of the COD is 65-75 percent and the decoloring effect is good. The invention has quick adsorption and settlement and little mud yield under the action of oxidization, adsorption and flocculation synergism and low cost and can be widely applied to cooling wastewater advanced treatment.

Description

technical field [0001] The coking wastewater advanced treatment agent and its application relate to a coking wastewater advanced treatment agent component, and further relate to its use method. Background technique [0002] Coking wastewater is wastewater produced in the process of coal coke production. It has complex components and contains dozens of inorganic and organic compounds. Among them, inorganic compounds mainly contain a large amount of thiocyanide, sulfide, etc.; Aromatic compounds also contain heterocyclic compounds such as nitrogen, sulfur, and oxygen. The traditional activated sludge method has a good treatment effect on phenol and cyanide. When the hydraulic retention time is 12h to 24h, the removal rate of phenolic substances can reach more than 99%, and the concentration of phenol and cyanide in the effluent reaches or approaches the discharge standard. The removal of COD is relatively poor. Generally, the COD of the effluent is about 250mg / L-350mg / L. Thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/72C02F1/28C02F1/52
Inventor 潘碌亭吴锦峰束玉保
Owner TONGJI UNIV
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