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Microbial nutrient solution, simultaneous removing method and device for SO2 and NO2 in industrial waste gas

A nutrient solution and microbial technology, applied in the field of environmental governance, to achieve the effects of reducing secondary pollution, simple operation process, and reduced operating costs

Inactive Publication Date: 2008-10-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention adopts biological method to reduce SO in industrial waste gas 2 and NO X Remove together, reduce operating costs, improve removal efficiency, solve the secondary pollution problem existing in conventional physical and chemical methods, and meet environmental protection emission requirements

Method used

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  • Microbial nutrient solution, simultaneous removing method and device for SO2 and NO2 in industrial waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: the composition and content of nutrient solution formula are as follows:

[0040] Na 2 SO 4 0.4g / L; (NH4) 2 SO 4 0.4g / L; Na 2 S 2 o 3 1.0g / L; K 2 HPO 4 1.1g / L; KH 2 PO 4 0.9g / L; KNO 3 1.8g / L; NaHCO 3 0.7g / L; MgSO 4 ·7H 2 O 0.8g / L; sodium lactate 4.0g / L; yeast extract 0.8g / L.

[0041] Using the above-mentioned microbial nutrient solution to reduce SO in industrial waste gas 2 and NO X The method for synchronous removal comprises the following steps:

[0042] (1) Soak the tower with the landfill leachate rich in desulfurization bacteria and denitrification bacteria for 1 to 2 days, and keep the temperature inside the tower at 25°C and the pH value at 7.5 under anaerobic environment

[0043] (2) Drain the landfill leachate, add microbial nutrient solution, start the pump, and when the nutrient solution is exhausted, drain the effusion and add fresh nutrient solution;

[0044] (3) After the surface of the filler is evenly covere...

Embodiment 2

[0048] Embodiment 2: the composition and content of nutrient solution formula are as follows:

[0049] Na 2 SO 4 0.5g / L; (NH4) 2 SO 4 0.5g / L; Na 2 S 2 o 3 0.9g / L; K 2 HPO 4 1.0g / L; KH 2 PO 4 1.0g / L; KNO 3 2.0g / L; NaHCO 3 0.5g / L; MgSO 4 ·7H 2 O 0.6g / L; sodium lactate 3.5g / L; yeast extract 1.0g / L.

[0050] Using the above-mentioned microbial nutrient solution to reduce SO in industrial waste gas 2 and NO X The method for synchronous removal comprises the following steps:

[0051] (1) Soak the tower with the landfill leachate rich in desulfurization bacteria and denitrification bacteria for 1 to 2 days, and keep the temperature in the tower at 35°C and the pH value at 8 in an anaerobic environment;

[0052] (2) Discharge 1 / 2 of the volume of landfill leachate, add and remove the same volume of microbial nutrient solution as the landfill leachate, start the pump, and when the nutrient solution is exhausted, drain the effusion and add fresh nutrient sol...

Embodiment 3

[0057] Embodiment 3: the composition and content of nutrient solution formula are as follows:

[0058] Na 2 SO 4 0.6g / L; (NH4) 2 SO 4 0.6g / L; Na 2 S 2 o 3 0.8g / L; K 2 HPO 4 0.9g / L; KH 2 PO 4 1.1g / L; KNO 3 2.2g / L; NaHCO 3 0.5g / L; MgSO 4 ·7H 2 O 0.6g / L; sodium lactate 3.0g / L; yeast extract 1.2g / L.

[0059] Using the above-mentioned microbial nutrient solution to reduce SO in industrial waste gas 2 and NO X The method for synchronous removal comprises the following steps:

[0060] (1) Soak the tower with landfill leachate rich in desulfurization bacteria and denitrification bacteria for 1 to 2 days, and keep the temperature inside the tower at 30°C and the pH value at 7.5 in an anaerobic environment;

[0061] (2) Discharge part of the landfill leachate, add and remove the same volume of microbial nutrient solution as the landfill leachate, start the pump, and when the nutrient solution is exhausted, drain the effusion and add fresh nutrient solution...

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Abstract

The invention relates to microorganism nutrient solution, and synchronous SO2 and NOx removal method and device when the microorganism nutrient solution is applied in industrial waste gas. The microorganism nutrient solution is composed of Na2SO4, (NH4)2SO4, Na2S2O3, K2HPO4, KH2PO4, KNO3, NaHCO3, MgSO47H2O, sodium lactate and yeast extract. a biotrickling filter is adopted for the device for the synchronous removal of SO2 and NOx, and a nutrient solution storage tank 2 is connected at the lower end of the biotrickling filter; an air inlet opening and an air inlet sampling opening are arranged on the bottom of the biotrickling filter, an air outlet opening and an air outlet sampling opening are arranged at the top part of the biotrickling filter, and liquid spraying nozzle is arranged above the packing material inside the biotrickling filter; a liquid inlet opening, a liquid drainage opening and a liquid sampling opening are all arranged at the lower end of the nutrient solution storage tank 2. The nutrient solution in the tank is beaten to the top of the filter for sprinkling by a centrifugal pump. The invention has the advantages that the desulfurization and the denitrification of the industrial waste gas can be solved together by using a biological method, the treatment processes is simple, and the investment cost is saved; compared with the traditional method, namely, wet limestone flue gas desulfurization and selective catalytic reduction denitrification, the investment of the invention can be saved by about 30 percent.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment, in particular to microbial nutrient solution and its application in industrial waste gas SO 2 and NO X Method and device for synchronous removal. Background technique [0002] SO 2 and NO X It is the most serious pollutant in air pollution and the culprit of "acid rain". With the rapid development of the world economy, the emission of industrial waste gas is increasing, and the problem of air pollution is becoming more and more serious. The desulfurization and denitrification of industrial waste gas has become the primary task of air pollution control. At present, the domestic and foreign waste gas desulfurization and denitrification methods mainly include: (1) ion plasma method: this method has been industrialized on a large scale, but ammonia is used as absorbent, which causes waste because ammonia is volatile and produces exhaust pollution; 2) Dry catalytic method: mainly...

Claims

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Application Information

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IPC IPC(8): C12N1/20B01D53/60B01D53/85C12R1/01
CPCY02A50/20
Inventor 张卫江徐姣何杰时彦卫李绪
Owner TIANJIN UNIV
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