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Method for preparing selective microbial packing

A biological filler and selective technology, applied in separation methods, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problems of reducing the treatment efficiency of desulfurization process, increasing the growth rate of dehydrocarbon bacteria, and poisoning desulfurization bacteria, etc. The effect of shortening the acclimation period, reducing the acclimation time, and increasing the biomass of desulfurization

Inactive Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] This method has the characteristics of simple film-hanging on the surface of the filler and convenient domestication of microbial colonies after film-hanging, but there are also shortcomings that are difficult to overcome during operation.
When the composition of exhaust gas changes, for example, the composition of hydrocarbon exhaust gas continues to increase during a period of operation, which will not only inhibit the growth and reproduction of desulfurization bacteria in the biofilm on the surface of the filler, but also increase the growth rate of dehydrogenation bacteria, resulting in The device enters a new domestication cycle, reducing the treatment efficiency of the desulfurization process, or poisoning the desulfurization bacteria, and even causing short-term paralysis of the device

Method used

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  • Method for preparing selective microbial packing

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preparation example Construction

[0014] The preparation method of selective biofiller of the present invention specifically comprises the following steps:

[0015] (1) Select plant fibers with a low degree of carbonization or a mixture of plant fibers and activated carbon as the basic biological filler in fertile land;

[0016] (2) Screen and isolate the obligate desulfurization bacteria group from the activated sludge in the sewage field of the factory area, and after purification, multiply and cultivate it in a large number in the nutrient solution to prepare the mother liquid of the desulfurization bacteria;

[0017] (3) leaching with nutrient solution and regularly spraying the basic biological filler to obtain a micro-ecological environment suitable for the growth of desulfurization bacteria;

[0018] (4) Spray the desulfurization mother liquor on the basic biological filler dipped in the nutrient solution to obtain the biological filler for selectively removing sulfide.

[0019] The plant organic fiber...

Embodiment 1

[0027] The A / O pool of the sewage treatment plant in the refinery often escapes malodorous gases such as hydrogen sulfide. Due to the influence of fluctuations in the inflow and outflow of the A / O pool, water temperature and other working conditions, the use of selective biological fillers can better adapt to the processing load. Fluctuation, to purify the malodorous gas.

[0028] The selective biological filler is filled in the microbial purification process device, and the preparation method of the selective biological filler is as follows:

[0029] The activated sludge taken from the A / O pool of the sewage treatment plant was placed in a shaker at 32°C (180r min -1 ) after shaking culture for 48 hours, select MLSS has reached 1000mg·L -1 The above culture solution was placed in selective medium (Na 2 S 2 o 3 ·5H 2 O 50.0g, KH 2 PO 4 20.0g,K 2 HPO 4 20.0g, MgSO 4 ·7H 2 O 4.0g, NH 4 Cl 2.0g, distilled water 5000mL, adjust the pH to about 7.0 with NaOH, add 0.3% ...

Embodiment 2

[0036] In the preparation process described in Example 1, the basic filler was replaced with a mixed basic filler with a volume ratio of peat and activated carbon of 4:1. The soaking of the basic filler and the spraying method of the nutrient solution are the same as in Example 1. Prepare 5.0w% sodium phosphate and 3.0w% potassium phosphate inorganic salts, 2.0w% sodium thiosulfate, and NO 3- , Mg 2+ and other nutrients. Use the prepared nutrient solution to spray the nutrient salt on the basic filler every 2.5 hours, keep its humidity in the range of 30-70%, dilute the desulfurization mother solution and spray it on the basic biological filler soaked in the nutrient solution, at 30 Under the condition of ℃ to 36 ℃, after 24 to 36 hours, a biological filler for selectively removing sulfide can be obtained.

[0037] Table 2 Physical properties of biological fillers for selective removal of sulfide

[0038] specific surface area

[0039] Apply the selective packing...

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Abstract

The invention relates to a method for preparing selective microbial packing. A plant organic fiber or a mixture of the plant organic fiber and activated carbon is used as basic packing, and the method comprises the following steps of: screening, separating and purifying activated sludge to obtain specific desulfurization bacteria; massively propagating and culturing the bacteria in nutrient solution to prepare desulfurization bacterium mother solution; and performing nutrient solution soaking, spraying and mother solution biofilm formation on the basic packing to prepare the selective microbial packing. The biological packing is used for microbial purification in waste gas treatment, and is particularly used for removing stinky pollutants produced in petrochemical plants, sewage treatment plants, urban sewage treatment plants, animal husbandry farms and the like. By the method, class I pollutants in exhaust gases of a refinery are treated specially, the treatment load and efficiency of the pollutants are improved, and impact resistance during change of working conditions is improved.

Description

technical field [0001] The invention relates to a microbial filler and a preparation method thereof, in particular to a microbial filler for selective biological deodorization of odorous pollutants produced in petrochemical sewage treatment plants, urban sewage treatment plants, animal husbandry farms and the like and a preparation method thereof. The invention belongs to the field of waste gas treatment. Background technique [0002] In the process of petrochemical production, some toxic pollutants are often discharged, such as: volatile organic compounds, sulfides, amines and so on. The sulfides emitted are the main pollutants that cause odor pollution in the production plant and surrounding living areas, and are also the main problem to be solved in environmental governance. [0003] With the development of biological desulfurization technology in the 1980s, this technology has been widely used due to its advantages of high desulfurization efficiency, low operating cost,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00B01D53/85
CPCY02A50/20
Inventor 刘璐郭兵兵王海波朴勇
Owner CHINA PETROLEUM & CHEM CORP
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