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A kind of method of organosilicon waste water treatment

A wastewater treatment and organosilicon technology, which is applied in water/sewage treatment, water/sewage multi-stage treatment, oxidized water/sewage treatment, etc. problem, to achieve the effect of COD reduction, easy operation and stable operation

Active Publication Date: 2021-08-10
上海善泽环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biodegradability of organosilicon wastewater is poor, and even with these enhanced pretreatment technologies, microbial treatment methods are still difficult to effectively remove organosilicon pollutants in wastewater

Method used

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  • A kind of method of organosilicon waste water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: organic silicon wastewater raw water COD 1200mg / L, pH 1.1; add lime to adjust the pH value of the wastewater to 8.5, and carry out precipitation to remove some organic matter; add NaOH alkali to the clear liquid after precipitation to adjust the pH to 11.8, and heat to 60°C, carry out the polymerization of organosilicon monomers, the polymerization time is 12hr, and then filter; the filtered waste water continues to be at 60°C, add acid to control pH3.0, and add 1.0kg of ferrous sulfate and 20kg of 27.5 per ton of waste water % hydrogen peroxide and other chemical oxidation treatment for 5 hours, the COD of the treated wastewater was reduced to 165mg / L.

Embodiment 2

[0020] Example 2: organic silicon wastewater raw water COD 1800mg / L, pH0.5; add lime to adjust the pH value of the wastewater to 7.0, and carry out precipitation to remove part of the organic matter; add NaOH and KOH to the supernatant after precipitation to adjust the pH to 11.5, and heat At 80°C, carry out the polymerization of organosilicon monomers, the polymerization time is 5hr, and then filter; the filtered waste water continues to be at 80°C, add acid to control pH4.0, and add 1.0kg of ferrous sulfate and 25kg of per ton of waste water 27.5% hydrogen peroxide, etc. were subjected to chemical oxidation treatment for 6 hours, and the COD of the treated wastewater was reduced to 204mg / L.

Embodiment 3

[0021] Example 3: organic silicon wastewater raw water COD 1600mg / L, pH 0.9; add lime to adjust the pH value of the wastewater to 7.5, and carry out precipitation to remove some organic matter; add NaOH and KOH to the supernatant after precipitation to adjust the pH to 12.0, and heat At 70°C, carry out the polymerization of organosilicon monomers, the polymerization time is 5hr, and then filter; the filtered waste water continues to be at 70°C, add acid to control pH3.5, and add 1.0kg ferrous sulfate and 25kg per ton of waste water 27.5% hydrogen peroxide, etc. were subjected to chemical oxidation treatment for 5 hours, and the COD of the treated wastewater was reduced to 210mg / L.

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Abstract

The invention discloses a method for treating organic silicon wastewater, which relates to the technical field of wastewater treatment. It includes the following steps: adjust the pH value of the wastewater to 7.0-8.5 by adding lime, and carry out precipitation to remove most of the condensable organic matter; add one or two kinds of NaOH and KOH to the precipitated supernatant to adjust the pH to above 11.5, and Heating to 60-80°C to carry out the polymerization of organosilicon monomers, the polymerization time is 5-12hr, and then filtered; the filtered waste water is kept at 60-80°C, adding acid to control pH3.0-4.0, and adding ferrous iron and Chemical oxidation treatment with hydrogen peroxide etc. for 4-6 hours; add lime to the resulting clear liquid to adjust the pH value to 6.0-8.5, let it stand still, discharge the clear liquid up to the standard, precipitate and dehydrate, dry and transport. The invention has the advantages of simple operation, stable operation, no biochemical treatment process, high-efficiency removal of organic silicon pollutants in waste water, and is easy to popularize and use.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating organic silicon wastewater. Background technique [0002] Organosilicon products are chemical products with a silicon-oxygen (Si-O) bond as the main chain structure. They have the characteristics of high temperature resistance, oxidation resistance, and corrosion resistance. Strong, complex chemical composition, high toxicity, high salinity, high COD concentration, difficult to degrade, etc., the biodegradability of wastewater is poor, the ratio of BOD5 to COD is often between 0.01-0.1, traditional biochemical degradation is almost impossible, hydrolysis acidification + anorexia Oxygen-aerobic treatment, effluent COD is still high. Fenton or its improved Fenton process is often used as the treatment process for organosilicon wastewater, but the effluent cannot meet the discharge requirements; membrane separation technology RO can obtain fresh w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10
CPCC02F1/02C02F1/5236C02F1/66C02F1/72C02F1/722C02F9/00
Inventor 耿石光陈春江王留芳殷林芳
Owner 上海善泽环保科技有限公司