Method for treating acidic polymetallic sulfate industrial wastewater by use of sulfate-reducing bacteria

A technology for industrial wastewater and sulfate, applied in anaerobic digestion treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems that domestic sewage cannot meet the needs of high-concentration sulfate radical reduction, and meet the application conditions Harsh, solve economic problems, easy to absorb and utilize

Inactive Publication Date: 2015-06-17
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The general feature is that it contains high nitrogen, sulfur and phosphorus, and is rich in nutrients. It can be used as a carbon and nitrogen source for microbial flora. However, in previous applications, due to the high concentration of sulfate radicals consuming a large amount of carbon and nitrogen sources, pure domestic sewage cannot meet the high requirements. Concentration needed for sulfate reduction

Method used

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  • Method for treating acidic polymetallic sulfate industrial wastewater by use of sulfate-reducing bacteria
  • Method for treating acidic polymetallic sulfate industrial wastewater by use of sulfate-reducing bacteria
  • Method for treating acidic polymetallic sulfate industrial wastewater by use of sulfate-reducing bacteria

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] a. Put the soybean meal in a container and let it ferment naturally for 3 days.

[0046] b. The fully fermented soybean meal is added into domestic sewage at a solid-liquid ratio of 1:20 to grind into a composite carbon source suitable for SRB growth;

[0047] c. Take a mine in Ji'an Ji'an with pH=1.56 containing 500mg·L -1 Fe 2+ Of acid sulfate wastewater 1L, its sulfate concentration [SO 4 2- ]3g·L -1 , Add SRB bacteria liquid in the ratio of 10+1;

[0048] d. The above-mentioned acid containing SRB containing Fe 2+ Sulfate wastewater and composite carbon source solution are based on the ratio of carbon to sulfur [SO 4 2- ] / [COD] is 1:2 and mixed, the sulfate concentration is 198.73mg·L -1 , Fe 2+ Concentration 3.83mg·L -1 And pH 5.80, flow into the anaerobic moving bed biofilm reactor with effective volume of 7.5L at a flow rate of 0.2L per hour;

[0049] e. The effluent is recycled, and the treated wastewater is passed into an anaerobic moving bed reactor with an effective v...

Embodiment 2

[0052] a. Put the corn germ meal in a container and let it ferment naturally for 4 days.

[0053] b. The fully fermented corn germ meal is added to domestic sewage at a solid-to-liquid ratio of 1:30 to grind to a size below 180 meshes to make a composite carbon source suitable for SRB growth;

[0054] c. Take a mine in Liaoning with pH=2.07 containing 1000mg·L -1 Cu 2+ Of acid sulfate wastewater 1L, its sulfate (SO 4 2- ) Concentration 8g·L -1 , Add SRB bacteria liquid in the ratio of 10+3;

[0055] d. The above-mentioned acid containing SRB containing Cu 2+ Sulfate wastewater and composite carbon source solution are based on the ratio of carbon to sulfur [SO 4 2- ] / [COD] is 1:3 and mixed, the sulfate concentration is 259.36mg·L -1 , Cu 2+ Concentration 1.37mg·L -1 And pH 6.07, flow into an anaerobic moving bed reactor with an effective volume of 7.5L at a flow rate of 0.3L per hour;

[0056] e. The effluent is recycled, and the treated wastewater is passed into an anaerobic moving bed...

Embodiment 3

[0059] a. Put the soybean meal in a container and let it ferment naturally for 5 days.

[0060] b. The fully fermented soybean meal is added into domestic sewage at a solid-to-liquid ratio of 1:40 to grind into a composite carbon source suitable for SRB growth;

[0061] c. Take a mine in Tonghua, Jilin with pH=2.0 containing 3000mg / L Zn 2+ Of acid sulfate wastewater 1L, its sulfate (SO 4 2- ) Concentration 15g·L -1 , Add SRB bacteria liquid in the ratio of 10+5;

[0062] d. The above-mentioned acid containing SRB containing Zn 2+ Sulfate wastewater and composite carbon source solution are based on the ratio of carbon to sulfur [SO 4 2- ] / [COD] is 1:2.5 after mixing, the measured sulfate concentration is 5227.24mg·L -1 , Zn 2+ Concentration 22.24mg·L -1 And pH 6.25, flow into an anaerobic moving bed reactor with an effective volume of 7.5L at a flow rate of 0.4L per hour;

[0063] e. The effluent is recycled, and the treated wastewater is passed into an anaerobic moving bed reactor with...

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Abstract

The invention relates to a method for treating acidic polymetallic sulfate industrial wastewater by use of sulfate-reducing bacteria (SRB). The method adopts domestic sewage as a diluent to adjust the acidity of industrial wastewater, and fermented soybean meal or corn germ meal is added into domestic sewage to serve as a composite carbon source of anaerobic microbial SRB to treat the acidic polymetallic sulfate industrial wastewater. Domestic sewage is wide in source and rich in nitrogen, sulfur and phosphorus and thus provides abundant nutrition for SRB, the fermented soybean meal and corn germ meal are easy to be absorbed and utilized, and the consumption of both carbon sources and nitrogen sources is reduced by the formed composite carbon source, so that the problem of high cost of the carbon source is solved. As domestic sewage is used for diluting acidic wastewater containing polymetallic sulfate, not only are the problems of harsh SRB application conditions and high treatment cost solved, but also convenience is provided for reclaiming polymetal in sulfate wastewater. The method not only solves the problem of industrial wastewater pollution to guarantee normal running of enterprises, but also lowers the cost to improve the performance of the enterprises.

Description

Technical field: [0001] The invention relates to a method for treating acidic polymetallic sulfate industrial waste water, in particular using domestic sewage as a diluent for adjusting the acidity of industrial waste water, and adding fermented soybean meal or corn germ meal to domestic sewage as anaerobic microbial sulfate reducing bacteria (Sulfate-reducing bacteria, SRB) composite carbon source, a method for treating acidic wastewater containing polymetallic sulfate. Background technique: [0002] Acidic polymetallic sulfate wastewater has a wide range of sources, including mining wastewater, non-ferrous metal and gold smelter industrial wastewater, non-ferrous metal processing plant pickling water, electroplating plant plating washing water, steel plant pickling drainage, electrolysis, pesticides, According to statistics, the annual discharge of such wastewater from pharmaceuticals, tobacco, paints, pigments, and polymetallic salt chemicals accounts for about 12% of industri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/28
Inventor 张国艳崔玉菓李滦宁季桂娟梁宏伟赵淑洁
Owner JILIN UNIV
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