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Method for treating waste water

A waste water treatment and waste water technology, which is applied in the direction of energy waste water treatment, biological water/sewage treatment, flotation water/sewage treatment, etc., can solve the problems of cost of money, land, and sewage treatment and discharge can not be stably met, and achieve energy saving and water resources, and the effect on the environment

Inactive Publication Date: 2007-12-12
SHANGHAI XINHONG DYEING & FINISHING
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AI Technical Summary

Problems solved by technology

[0003] The present invention provides a waste water treatment method for overcoming the defects that the waste water treatment and discharge of old enterprises cannot be stably up to the standard, and the waste water treatment system is time-consuming, expensive in land and money.

Method used

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  • Method for treating waste water
  • Method for treating waste water
  • Method for treating waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Wastewater treatment method

[0026] 1. Air flotation physical treatment;

[0027] The waste water containing high-concentration raffinate and high-COD produced by various dyeing and finishing is classified through pipelines, collected and stored in special containers, and then treated by air flotation physical-chemical device (JM-V air flotation water purifier). Low concentration wastewater and thick suspensions are formed. The low-concentration wastewater formed after the air flotation treatment has a color removal rate of more than 50%, a COD removal of 55-80%, and a BOD removal of about 50%.

[0028] According to the original design scheme of the JM-V type air flotation water purifier, tap water is used as the vaporized water. We use low-concentration waste water that has been treated by air flotation and physicochemical treatment instead of tap water as gasification water, which not only saves tap water, but also reduces the total amount of waste water discharge....

Embodiment 2

[0043]On the basis of Example 1, in order to facilitate the biochemical treatment, the volume of the PH adjustment reservoir is required to be as large as possible, but for old enterprises, because of the congenital deficiencies in design and manufacture, the volume of the reservoir was originally not large, after two years More than ten years of siltation has "eat" a volume, and two methods are generally used to make up for it. One is to build a new pH-adjusting reservoir to expand the wastewater capacity; the other is to dredge the original pH-adjusting reservoir. We dredged the original pH adjustment reservoir, pumped the wastewater sludge in the pH adjustment reservoir into the mud pool 12 with a mud pump, entered the three-way control valve 5 through the pipeline 2, and then poured it into the clamp 5 to clamp it. In the woven bag 4 on the three-way control valve 5, the waste water is press-filtered out of the woven bag 4 through the pressure filtration generated by the sl...

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Abstract

The invention belongs to wastewater treatment field, especially relates to printing and dyeing mill wastewater treatment. The invention employs sorting and collecting physico-chemical treatment, automatic- pressure filtering and separating wastewater and further chemical treatment for active sludge, to reduce the COD concentration in primary discharged water by 15%, and meet national standard. The invention is characterized by greatly saved energy and resource and benefit for environmental and resource protection and sustainable development.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a method for treating waste water in the textile printing and dyeing industry. Background technique [0002] For the old enterprises engaged in dyeing and finishing (generally, they have been in operation for more than 20 years), because the sewage treatment system was built early and limited by the technical conditions at that time, most of them adopt primary biochemical treatment. Today, due to the long service life of these systems, the operating efficiency is much lower than the original design indicators. COD (chemical oxygen demand), SS (suspended solids), BOD in sewage 5 (5-day biochemical oxygen demand) and chromaticity treatment are difficult to achieve stable discharge standards. If the sewage treatment system (ZL200410018253.8) is rebuilt, tens of millions of funds will be needed at every turn, which is obviously unbearable for the old enterprises. Contents of the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/24C02F1/52C02F1/66C02F3/12C02F1/72
CPCY02W10/10Y02W10/37
Inventor 李健施建民苏伟国沈东俊何鸣
Owner SHANGHAI XINHONG DYEING & FINISHING
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