Reuse treating method for chemical industrial plasticizer waste water

A treatment method and technology for plasticizers are applied in the field of treatment and resource utilization of plasticizer production wastewater, which can solve the problems of difficulty in reaching the standard of effluent water quality, increasing the operating load and treatment cost of sewage treatment facilities, and wasting recyclable resources. , to achieve the effect of saving the dosage of chemicals, reducing costs and improving water quality

Active Publication Date: 2008-07-23
浙江嘉澳环保科技股份有限公司
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Problems solved by technology

[0007] The existing treatment process mainly collects all kinds of chemical production wastewater for treatment, which not only increases the operating load and treat

Method used

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  • Reuse treating method for chemical industrial plasticizer waste water
  • Reuse treating method for chemical industrial plasticizer waste water

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Experimental program
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Embodiment Construction

[0050] The present invention will be further described below in conjunction with drawings and embodiments.

[0051] 1. High COD wastewater

[0052] Implementation Step 1: Demulsification and oil separation pretreatment

[0053] Take 2L of epoxy ester alkali washing wastewater (water quality: COD16000~25000mg / L, pH8~10), stir vigorously, slowly add concentrated sulfuric acid, measure the acidity with a pH meter in real time, and take samples at different pHs to determine COD (filtered through filter paper) , to the end of about pH=1.5.

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Abstract

The invention relates to a recycling and processing method of waste water of a chemical plasticizer, which pertains to the technical field of waste water treatment and resource recycling. The basic proposal is that: the waste water that belongs to high COD (COD is 6000-30000mg/L; BOD is 2000-10000mg/L; pH is 4-12) such as DOG waste water, the caustic washing waster water of epoxy-ester and oil and fats refining waste water, after being respectively pretreated, is mixed with TOTM waste water and enters into a biological and chemical system for processing. The waste water with low COD (COD is 500-2000mg/L; pH is 4-12) is done with aerobic biological treatment after being collected uniformly, then goes through advanced treatment with a membrane method and ozonation catalytic oxidation after coagulation, deposition and filtration and is reused in production. The effluent processed by the invention has stable water quality and can discharge up to standards. The waste water after purification can be reused in production, does not influence the product quality of the plasticizer and has economical and reasonable investment, operation cost and practical and feasible technique.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment and resource reuse, and relates to a technical method for the treatment and resource utilization of plasticizer production waste water, specifically DOG waste water, epoxy ester alkali washing waste water, oil refining waste water, TOTM waste water and various cooling waste water. Water treatment and reuse methods. Background technique [0002] The chemical industry is one of the main industries that utilize and consume water resources in my country. It needs steam injection water, cooling water, and production water as various solvents in the production process. Its characteristic is that the water consumption and displacement are very large. There are also great differences in the quality and quantity of the various wastewater discharged. Some of the water has a low COD concentration. Combined with my country's current water resource recycling and energy conservation and emission r...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/40C02F1/66C02F3/30C02F1/52C02F1/44
Inventor 赵伟荣郝睿章金富沈健
Owner 浙江嘉澳环保科技股份有限公司
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