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Integrated treatment method for desulfurization waste water in thermal power plant

A desulfurization wastewater and treatment method technology, which is applied in the direction of gaseous effluent wastewater treatment, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problems of large amount of treatment agent, slow response, complex process, etc., to achieve No secondary pollution, reduced usage, simple method

Inactive Publication Date: 2019-04-26
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional desulfurization wastewater treatment process adopts the treatment methods of neutralization, reaction, flocculation and precipitation, and needs to add lime milk, coagulant, organic sulfur, coagulant, bleach and other chemicals. High consumption, difficult to control the reaction, slow reaction, etc., and it has not achieved a good removal effect on the high concentration of sulfate and chloride ions in the desulfurization wastewater

Method used

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  • Integrated treatment method for desulfurization waste water in thermal power plant
  • Integrated treatment method for desulfurization waste water in thermal power plant
  • Integrated treatment method for desulfurization waste water in thermal power plant

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Embodiment 1

[0040] As an integrated treatment method for desulfurization wastewater in a thermal power plant according to an embodiment of the present invention, the method comprises the following steps:

[0041] (1) Coagulate with PAC, PAM and lime, and treat desulfurization wastewater physically and chemically;

[0042] (2) Mix the desulfurization wastewater treated in step (1) with the sulfate-reducing bacteria medium inoculated with Citrobacter freundii SR10 and Enterococcus avium BY7 and fermented and grown, wherein the The concentration of sulfate-reducing bacteria in the culture medium after the growth is 1×10 10 ~5×10 10 cfu / ml;

[0043] (3) adjusting the pH of the culture medium to 7-8, adding 10% of the desulfurization waste water from thermal power plants after the physicalization to the cultured sulfate-reducing bacteria culture medium, stirring and mixing;

[0044] (4) Introduce nitrogen for 20 minutes to ensure an anaerobic culture environment, and culture at 30° C. for 7...

Embodiment 2

[0054] As an integrated treatment method for desulfurization wastewater in a thermal power plant according to an embodiment of the present invention, the method comprises the following steps:

[0055] (1) Coagulate the desulfurization wastewater with PAC, PAM and lime, and treat the desulfurization wastewater physically and chemically;

[0056] (2) Inoculate Enterococcus avium (Enterococcus avium) BY7 into the sulfate-reducing bacteria medium, stir and mix, and then cultivate for 3-4 days at a pH value of 3-8 and a temperature of 20-40°C to reach the maximum The amount of bacteria; the concentration of the BY7 sulfate-reducing bacteria in the medium is 1 × 10 10 ~5×10 10 cfu / ml;

[0057] (3) The pH of the culture medium is adjusted to 7-8, and 10% of the thermal power plant desulfurization waste water after physicalization is added to the cultured sulfate-reducing bacteria culture medium, and stirred and mixed; the sulfate concentration in the waste water is 900-1100mg / L; ...

Embodiment 3

[0062] As an integrated treatment method for desulfurization wastewater in a thermal power plant according to an embodiment of the present invention, the only difference between the method described in this embodiment and Embodiment 2 is:

[0063] (2) Inoculate Citrobacter freundii SR10 into a sulfate-reducing bacteria culture medium.

[0064] Experimental results

[0065] Repeat described experiment 3 times, find that Citrobacter freundii (Citrobacter freundii) SR10 is 98.1% to the removal rate of sulfate in desulfurization wastewater, and 50-99% to heavy metal removal rate, as figure 2 shown.

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Abstract

The invention provides an integrated treatment method for desulfurization waste water in a thermal power plant. The method comprises the following steps: (1), coagulating and precipitating the desulfurization waste water; (2), mixing the desulfurization waste water treated in the step (1) with a sulfate reducing bacteria culture medium, to which sulfate reducing bacteria are inoculated and subjected to fermentation growth, wherein the concentration of grown sulfate reducing bacteria in the culture medium is 1*1010 to 5*1010cfu / ml; (3), reacting for 24 to 72h in an anaerobic condition with thepH value being 3 to 8. The method can reduce the usage amount of medicals, reduce energy consumption, and does not produce secondary pollution; the method is simple, and can be promoted and used; themethod can effectively reduce the contents of salinity, heavy metal and organic matter in waste water, and reduce corrosion to equipment during recycling of the desulfurization waste water.

Description

technical field [0001] The invention belongs to the technical field of waste water biological treatment, and in particular relates to an integrated treatment method for desulfurization waste water in a thermal power plant. Background technique [0002] Sulfate widely exists in domestic sewage, industrial wastewater and agricultural wastewater, and its concentration range is wide; if it is not treated properly, it will cause serious pollution to the environment. Symptoms of sulfate poisoning in humans include indigestion and diarrhea. The presence of sulfate in wastewater will cause serious corrosion to the treatment system, increasing the cost and difficulty of system operation and maintenance. In addition, industrial sulfate wastewater (such as mine wastewater, desulfurization wastewater, etc.) often contains copper, nickel, chromium, lead, gold, silver, mercury and other heavy metal ions or their complex ions. Because such heavy metal ions are chemically stable in the na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/18
CPCC02F1/52C02F1/56C02F3/282C02F2103/18
Inventor 阎佳袁文欢刘健叶伟卓高珊珊林锦兰黄选谢家豪谢杰辉王思霁
Owner GUANGZHOU UNIVERSITY
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