Treatment method and treatment system for high-concentration mixed salt organic wastewater

A technology of organic wastewater and treatment methods, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem that wastewater cannot be recycled, organic matter cannot be processed, and the reuse rate is low. problems, to achieve the effect of reducing the content of heavy metal ions, high-quality recovery, and high recycling rate

Active Publication Date: 2016-01-20
安徽中飞科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method cannot handle high-salt wastewater with high organic matter content, and the recovered salt impurities are many, the treated wastewater cannot be recycled, and the reuse rate is low

Method used

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  • Treatment method and treatment system for high-concentration mixed salt organic wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] The COD value of the organic substance content in the high-concentration mixed salt organic wastewater is 20000mg / L, the mass content of heavy metal ions is 47.8mg / L, the pH value is 4.3, the mass content of sodium salt is 5.1%, and the mass content of sodium chloride is 2.1%, the mass content of sodium sulfate is 3%.

[0102] The above-mentioned high-concentration mixed salt organic wastewater is treated, and the specific process is as follows:

[0103] Add ferric chloride solution and polyacrylamide to the above-mentioned high-concentration mixed salt organic wastewater, adjust its pH value to 7-8 with NaOH solution to carry out coagulation and precipitation, and press filter the product after coagulation and precipitation to obtain the precipitate and filtrate , using the LSC series heavy metal adsorption resin provided by Xi'an Lanxiao Technology New Materials Co., Ltd. to adsorb the above-mentioned filtrate to obtain a mixed solution, the mass content of heavy meta...

Embodiment 2

[0110] The COD value of the organic substance content in the high-concentration mixed salt organic wastewater is 40000mg / L, the mass content of heavy metal ions is 39.2mg / L, the pH value is 3.8, the mass content of sodium salt is 12.4%, and the mass content of sodium chloride is 4.1%, the mass content of sodium sulfate is 8.3%.

[0111] The above-mentioned high-concentration mixed salt organic wastewater is treated, and the specific process is as follows:

[0112] Add ferric chloride solution and polyacrylamide to the above-mentioned high-concentration mixed salt organic wastewater, and use NaOH solution to adjust its pH value to 7-9 to carry out coagulation and precipitation, and press filter the product after coagulation and precipitation to obtain the precipitate and filtrate , using the LSC series heavy metal adsorption resin provided by Xi'an Lanxiao Technology New Materials Co., Ltd. to adsorb the above-mentioned filtrate to obtain a mixed solution, the mass content of h...

Embodiment 3

[0119] The COD value of the organic substance content in the high-concentration mixed salt organic wastewater is 80000mg / L, the mass content of heavy metal ions is 99.2mg / L, the pH value is 5.8, the mass content of sodium salt is 16.4%, and the mass content of sodium chloride is 3.1%, the mass content of sodium sulfate is 13.3%.

[0120] The above-mentioned high-concentration mixed salt organic wastewater is treated, and the specific process is as follows:

[0121] Add ferric chloride solution and polyacrylamide to the above-mentioned high-concentration mixed salt organic wastewater, adjust its pH value to 7-8 with NaOH solution to carry out coagulation and precipitation, and press filter the product after coagulation and precipitation to obtain the precipitate and filtrate , using the LSC series heavy metal adsorption resin provided by Xi'an Lanxiao Technology New Materials Co., Ltd. to adsorb the above-mentioned filtrate to obtain a mixed solution, the mass content of heavy ...

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Abstract

The invention provides a treatment method for high-concentration mixed salt organic wastewater. The treatment method for the high-concentration mixed salt organic wastewater comprises the following steps: carrying out coagulating sedimentation on the high-concentration mixed salt organic wastewater, so as to obtain sediments and mixed liquor; carrying out vacuum fractionation on the mixed liquor, so as to obtain fraction and fractional distillate; carrying out evaporative crystallization on the fractional distillate, so as to obtain sodium salt and low-concentration mixed salt organic condensate wastewater; carrying out aerobic biological treatment on the low-concentration mixed salt organic condensate wastewater, so as to obtain low-concentration organic wastewater; carrying out reverse osmosis treatment on the low-concentration organic wastewater, so as to obtain treated wastewater and a reverse osmosis concentrate solution; and carrying out evaporative crystallization on the reverse osmosis concentrate solution, so as to obtain sodium salt, wherein the high-concentration mixed salt organic wastewater contains sodium salt, heavy metal ions and organic matters. The treatment method for the high-concentration mixed salt organic wastewater has the advantages that the sodium salt in the wastewater can be efficiently recycled, treated wastewater can meet industrial usage requirements, reuse rate is high, and zero wastewater discharge is realized. The invention also provides a treatment system for the high-concentration mixed salt organic wastewater.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a treatment method and system for high-concentration mixed-salt organic wastewater. Background technique [0002] The metallurgical industry produces a variety of industrial products with different production processes, and a large amount of waste water is discharged during the process of preparing industrial products, causing environmental pollution. Wastewater discharge in the metallurgical industry has the characteristics of large discharge volume, high salinity, high concentration of organic matter, high toxicity, refractory degradation, and complex and changeable water quality. The wastewater discharged from the metallurgical industry is mainly high-concentration mixed-salt organic wastewater. According to the differences in the production process of the metallurgical industry, the types and chemical properties of the organic substances contained in i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C01D3/06C01D5/00
Inventor 王艳朱刘
Owner 安徽中飞科技有限公司
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