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Coagulation decolorizer suitable for pH adjustment of wastewater treatment in coal chemical industry, and preparation method of coagulation decolorizer

A technology for sewage treatment and decolorizing agent, applied in the field of water treatment, can solve the problems of many by-products, unstable pH, and high chromaticity of wastewater, and achieve the effects of reducing water treatment costs, convenient and quick dosing, and improving dosing environment.

Inactive Publication Date: 2018-07-06
ZHEJIANG BEROOT ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the waste water is discharged without treatment, it will cause different properties and degrees of pollution to the water body, thereby endangering human health and affecting industrial and agricultural production.
And this kind of chemical wastewater also has the following characteristics: 1. The water quality is complex, with many by-products, and the pH is unstable; 2. The pollutant content in the wastewater is high; 3. There are many toxic and harmful substances, such as heavy metals, lead, cadmium, etc.; 4. There are many biodegradable substances, the B / C ratio is low, and the biodegradability is poor; 5. The chroma of wastewater is high

Method used

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  • Coagulation decolorizer suitable for pH adjustment of wastewater treatment in coal chemical industry, and preparation method of coagulation decolorizer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: A coagulation aid decolorant suitable for chemical industry sewage treatment to adjust pH, said coagulation aid decolorant is composed of the following components by mass percentage: calcium hydroxide or calcium oxide 10%-50%; Sodium 0.1%-2%; potassium hydroxide 0.05%-1%; calcium carbonate 0.05%-1%; diatomaceous earth 0.01%-1%; the whiteness of calcium hydroxide or calcium oxide is 85%-96%, The mesh number is 100 mesh-800 mesh, and the purity is 99%. The pH of the coagulation aid decolorizer prepared by the above composition ratio is 12-14, which is fine and moist white sludge milky and strong alkaline. It acts on various acidic wastewater and reacts quickly; it can effectively remove phosphate, sulfate and fluoride ions, etc. Anion; it can destroy the combination of sulfamate and other complexing agents or chelating agents to some metal ions; it can destabilize and demulsify emulsion wastewater by adjusting the pH value; through sieving, mixing, dissolvin...

Embodiment 2

[0018] Example 2: The ammonia distillation wastewater and other wastewater produced by a coking company in Shanxi are treated using the A2 / O2 process. The ammonia distillation wastewater and other wastewater from the chemical production workshop enter the After adjusting the water quality and quantity in the regulating tank, it is pumped into the anaerobic tank, and the anaerobic treated wastewater is mixed with the return flow of the secondary sedimentation tank and then enters the anoxic tank for denitrification reaction. The wastewater after anoxic denitrification treatment flows into the aerobic tank for aerobic biochemical treatment and nitrifies ammonia nitrogen. The effluent from the aerobic tank enters the contact oxidation tank for further biochemical treatment after passing through the secondary settling tank, and then passes through the mixing reaction tank, where polyferric sulfate and PAM (flocculant: polyacrylamide) are added to the tank, and the effluent is separ...

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Abstract

The invention relates to a coagulation decolorizer suitable for pH adjustment of wastewater treatment in coal chemical industry; the coagulation decolorizer is prepared from the following components by mass percent: 10-50% of calcium hydroxide or calcium oxide, 0.1-2% of sodium hydroxide, 0.05-1% of potassium hydroxide, 0.05-1% of calcium carbonate and 0.01-1% of diatomaceous earth, wherein the whiteness of the calcium hydroxide or the calcium oxide is 85-96%, the mesh number of the calcium hydroxide or the calcium oxide is 100-800 meshes, and the purity of the calcium hydroxide or the calciumoxide is 99%. The coagulation decolorizer has good effects of decoloring, removing phosphorous, removing suspended solids (SS) and certain heavy metals, adjusting pH and water quality, and the like.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a coagulation-assisting and decolorizing agent suitable for adjusting pH in sewage treatment in the coal chemical industry and a preparation method thereof. Background technique [0002] Chemical wastewater is the process wastewater, cooling water, exhaust gas washing water, equipment and site washing water and other wastewater discharged in chemical production. If the waste water is discharged without treatment, it will cause different properties and different degrees of pollution of the water body, thereby endangering human health and affecting industrial and agricultural production. And this kind of chemical wastewater also has the following characteristics: 1. The water quality is complex, with many by-products, and the pH is unstable; 2. The pollutant content in the wastewater is high; 3. There are many toxic and harmful substances, such as heavy metals, lead, cadmium, etc.; 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C02F1/62C02F1/58C02F101/10
CPCC02F1/58C02F1/62C02F1/66C02F2101/105
Inventor 干建文徐辉张闰容
Owner ZHEJIANG BEROOT ENVIRONMENTAL PROTECTION TECH CO LTD
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