Composite filled column mechanism, method for immobilizing bacteria and method for treating leach liquor

Abstract

The invention discloses a composite filled column mechanism which comprises a shell and a peristaltic pump. An annular porous aerator pipe and composite fillers are arranged in the shell from bottom to top, the porous aerator pipe is horizontally arranged, the composite fillers include K3 fillers and modified polyurethane foam fillers which are uniformly mixed with one another, and a stacking volume ratio of the K3 fillers to the modified polyurethane foam fillers is 3:1; an air pump is connected with the porous aerator pipe by a ventilation pipe, the bottom of the shell is connected with an outlet of the peristaltic pump, and a stock solution pond is connected with an inlet of the peristaltic pump; a liquid outlet is formed in a position between the shell and the tops of the composite fillers. The invention further discloses a method for immobilizing acidophilia iron oxide bacteria by the aid of composite filled columns and a method for treating mixed ore tonnage column leaching leachliquor by the aid of the composite filled column mechanism. The composite filled column mechanism and the methods have the advantages that Fe3+ regeneration ponds can be upgraded and transformed, excellent effects of oxidizing Fe2+ in the acidic column leaching leach liquor can be realized by the composite filled column mechanism, and stable effects of oxidizing ferrous iron in various concentration regions can be realized by the composite filled column mechanism.

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

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