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

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...

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

Images