Composite packing column mechanism, immobilization method of bacteria and leachate treatment method

A technology of composite filler and bacteria, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of long start-up time, system activity inhibition, short start-up time, etc., and achieve stability Oxidation effect, high application potential, short start-up time effect

Active Publication Date: 2020-05-22
EAST CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

First of all, for the internal fixed mode, the system start-up time is relatively short, but long-term operation or the increase of iron concentration in the system will bring a large amount of ferrovanadium precipitation, which will block the filler gap and limit the iron oxidation capacity of the system
Secondly, for the surface-fixed system, the system start-up time is relatively long, and environmental factors are easy to limit the system activity. The entry of toxic and harmful elements, sudden drop in temperature, sudden stop of aeration and oxygen supply, or insufficient substrate will all lead to system failure. The activity is significantly inhibited, and the activity recovery period is as long as more than 10 days
Therefore, above-mentioned two kinds of ways all have shortcoming and deficiency
[0005] In view of the aforementioned problems, the present invention provides a method for the combination of internal fixation and surface fixation of eosinophilic ferrous oxide bacteria, which not only solves the problem of yellow iron vanadium clogging the gap and reducing the volumetric efficiency of the system, but also solves the problem of the stability of the surface fixation and the long recovery period. question

Method used

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  • Composite packing column mechanism, immobilization method of bacteria and leachate treatment method
  • Composite packing column mechanism, immobilization method of bacteria and leachate treatment method
  • Composite packing column mechanism, immobilization method of bacteria and leachate treatment method

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Embodiment Construction

[0043] figure 1 The direction indicated by the middle arrow is the flow direction of the fluid.

[0044] Such as Figure 1 to Figure 5 As shown, the present invention provides a composite packing column mechanism, including a housing 1 and a peristaltic pump 2, and the housing 1 is provided with an annular microporous aeration tube 3 and composite packing from bottom to top, and the microporous aeration tube 3 Horizontally arranged, the composite filler includes uniformly mixed K3 filler 4 and modified polyurethane foam filler 5, and the bulk volume ratio of K3 filler 4 and modified polyurethane foam filler 5 is 3:1;

[0045] The microporous aeration pipe 3 is connected to an air pump 7 through a ventilation pipe 6, the bottom of the housing 1 is connected to the outlet of the peristaltic pump 2 through a pipe 8, and the inlet of the peristaltic pump 2 is connected to a stock solution pool 9 through a pipe;

[0046] The top of the composite packing is lower than the top of t...

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Abstract

The invention discloses a composite packing column mechanism, which includes a shell and a peristaltic pump. The shell is provided with an annular microporous aeration tube and a composite packing from bottom to top, the microporous aeration tube is arranged horizontally, and the composite packing includes a uniformly mixed K3 filler and modified polyurethane foam filler, the bulk volume ratio of K3 filler and modified polyurethane foam filler is 3:1; the microporous aeration tube is connected to an air pump through the vent tube, and the bottom of the shell is connected to the outlet of the peristaltic pump. The inlet of the peristaltic pump is connected with a stock solution pool; a liquid outlet is provided between the casing and the top of the composite packing. The invention also discloses an immobilization method of acidophilic ferrous oxidizing bacteria using the above-mentioned composite packing column, and a treatment method of the leaching liquid of the ton-scale mixed ore column using the above-mentioned composite packing column mechanism. The present invention can treat Fe 3+ The regeneration tank was upgraded, and the composite packing column mechanism was used to reduce the Fe content of the acidic column leaching solution. 2+ It has a good oxidation effect, and also has a stable oxidation effect on ferrous iron in various concentration ranges.

Description

technical field [0001] The invention relates to the immobilization technology of acidophilic ferrous oxidizing bacteria. Background technique [0002] As a major acidophilic ferrous oxidizing bacteria, acidophilic Thiobacillus ferrooxidans is a kind of acidophilic, chemoautotrophic, Gram-negative bacteria; the optimum growth temperature is 30℃, and the optimum pH is 1.8; Oxidation of ferrous iron, non-+6 valent sulfur, hydrogen and formate, the main application value is the oxidation function of iron and sulfur. Due to its unique iron and sulfur oxidation properties, it is widely used in bioleaching, copper leaching of waste circuit boards, bioleaching of excess sludge, improvement of municipal sludge dehydration performance, and flue gas desulfurization. [0003] Using a suitable biofilm reactor to immobilize acidophilic ferrous oxide microorganisms can obtain stable and efficient iron and sulfur oxidation effects. There are two main forms of colony immobilization of acid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34
CPCC02F3/348
Inventor 李泽兵孙占学蒋亚飞周仲魁刘帅张晓玲毛敬岩张艳梅王学刚史维俊
Owner EAST CHINA UNIV OF TECH
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