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Printing waste water purification reuse method

A wastewater treatment technology, applied in chemical instruments and methods, water/sewage treatment, natural water treatment, etc., can solve the problems of low reuse rate of purified water, low purification degree, residual pollutants, etc., and achieve stable water quality treatment , No waste of water resources, and the effect of improving the reuse rate

Inactive Publication Date: 2019-04-05
河南省邮电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a method for purifying and reusing printing wastewater, which solves the problems of residual pollutants in the purified water after purification of the existing printing wastewater, low degree of purification and low reuse rate of purified water

Method used

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Embodiment 1

[0033] A method for purifying and reusing printing wastewater provided by a preferred embodiment of the present invention includes the following steps:

[0034] Step 1: Put the printing wastewater into the regulating tank through the lifting pump, add coagulant in the regulating tank to make the suspended matter in the wastewater form large particles, and then send it to the air flotation tank;

[0035] Step 2: The wastewater discharged to the air flotation tank, through air flotation, the suspended matter of the particles is effectively gathered to achieve solid-liquid separation, and the suspended matter is removed by the slag scraper, which initially reduces the concentration of suspended particles in the water. The bottom of the air flotation tank is clean Then sent to the oxidation pond;

[0036] Step 3: The wastewater discharged to the oxidation pond, the organic matter in the wastewater is decomposed under the action of aerobic microorganisms, most of the organic matter...

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Abstract

The invention discloses a printing waste water purification reuse method, and belongs to the technical field of printing. According to the method, firstly, printing waste water enters an adjusting tank by a lifting pump, coagulants are into the adjusting tank, suspended solids in waste water form large particles, the waste water is discharged into a floatation tank, particle suspended solids are aggregated under the action of air flotation and removed by a slag scraper, clear water in the bottom of the floatation tank is conveyed into an oxidation tank, organic matters are decomposed under theaction of aerobe, most of organic matters are removed, waste water is conveyed into a biochemical tank, COD (chemical oxygen demand) and BOD5 (biochemical oxygen demand) are removed, the settling ability of particulate matters is improved, sludge settles to the bottom of the biochemical tank, liquid supernatant is conveyed to a sand filter tank, filtering is implemented, and purified water without color scale, SS and petroleum compounds is acquired, discharged into a clear water tank, collected and conveniently reused. The method solves the problems that after existing printing waste water ispurified, residual pollution is present in the purified water, the purification degree is not high, and the recycling rate of the purified water is low.

Description

technical field [0001] The invention belongs to the technical field of printing and relates to a method for purifying and reusing printing wastewater. Background technique [0002] Water is the source of life and the only irreplaceable natural resource on earth. my country's per capita water resources are only 1 / 4 of the world's average level. Insufficient water sources, water pollution and ecological deterioration of the water environment have become constraints to development. Protecting water resources, preventing and controlling water pollution, and improving water environment ecology are important contents in protecting the environment and implementing sustainable development. [0003] Printing wastewater is a general term for printing residual liquid, plate wiping wastewater, plate making wastewater, cleaning wastewater, etc. produced during the printing process. It is a kind of industrial wastewater that is difficult to treat. Printing wastewater contains a large amo...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/34
CPCC02F1/001C02F1/24C02F1/5236C02F1/54C02F1/56C02F3/02C02F3/108C02F9/00C02F2103/34
Inventor 燕其廷张蕾
Owner 河南省邮电科技有限公司
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