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Wastewater treatment process

A wastewater treatment and process technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of large quantity and other problems, and achieve the effect of simple process, great popularization and application value, and fast flocculation speed.

Inactive Publication Date: 2016-01-06
WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current composite flocculants generally have problems such as complicated synthesis and preparation procedures, high cost, large amount of sludge, and unsatisfactory treatment effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Add limestone to the water sample to stir, adjust the pH to 8, and then filter to remove the precipitate;

[0036] (2) Add ozone to the waste water filtered in step (1) for decolorization, add 35 mg of composite flocculant for every 1 L of waste water, stir for 30 min, and let stand for 8 hours to settle and separate;

[0037] (3) filter the waste water of step (2), add active carbon adsorption, and then filter;

[0038] Wherein the content of each component of the flocculant includes the following raw materials by weight:

[0039]

Embodiment 2

[0041] (1) Add limestone to the water sample to stir, adjust the pH to 6, and then filter to remove the precipitate;

[0042] (2) Add sodium hypochlorite to the waste water filtered in step (1) for decolorization, add 20 mg of composite flocculant for every 1 L of waste water, stir for 20 min, and let stand for 1 hour to settle and separate;

[0043] (3) filter the waste water of step (2), add active carbon adsorption, and then filter;

[0044] Wherein the content of each component of the flocculant includes the following raw materials by weight:

[0045]

Embodiment 3

[0047] (1) Add limestone to the water sample to stir, adjust the pH to 6.5, and then filter to remove the precipitate;

[0048] (2) Add hydrogen peroxide to the waste water filtered in step (1) for decolorization, add 50 mg of composite flocculant for every 1 L of waste water, stir for 40 min, and let stand for 10 hours to settle and separate;

[0049] (3) filter the waste water of step (2), add active carbon adsorption, and then filter;

[0050] Wherein the content of each component of the flocculant includes the following raw materials by weight:

[0051]

[0052]

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PUM

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Abstract

The invention discloses a wastewater treatment process. The method comprises the following steps: adding limestone into a water sample, stirring, adjusting the pH value, and removing precipitates by filtering; adding an oxidizing agent for decoloration into the filtered wastewater, adding a composite flocculant, stirring, standing, and carrying out settling separation; and filtering the wastewater again, adding activated carbon for filtration, and filtering the obtained product again. The process disclosed by the invention is simple; due to the adoption of the composite flocculant, the cost is reduced, and the treatment effect is improved; and the process is convenient in raw material source, high in wastewater treatment efficiency, good in water purification effect, rapid in flocculation speed, and easy to operate. In the process of treating high-concentration organic wastewater subjected to combined discharge, the COD removal rate can reach 35-70%, therefore, the process disclosed by the invention has a great popularization and application value in the aspect of purification treatment of wastewater.

Description

technical field [0001] The invention relates to a process for treating wastewater. Background technique [0002] With the progress of the times, industry and agriculture have become more and more developed. While such development has created wealth for human beings, it has also caused varying degrees of harm to the environment, especially the pollution of water resources. At present, the main domestic wastewater treatment methods include alkali recovery method, electrodialysis, biochemical method, etc., but the above methods have problems such as high technical content, large investment, and high operating cost. [0003] The flocculation and sedimentation method is an economical and convenient method for sewage treatment. In the flocculation and sedimentation method, the choice of flocculant is the most critical. Among flocculants, inorganic flocculants have disadvantages such as large dosage and high moisture content of sludge. However, although the existing organic poly...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/52C02F1/56
Inventor 徐德生
Owner WUXI JIABANG ELECTRIC POWER PIPE FACTORY
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