Acid-resistance heterotrophic bacterium strain Z3 used for bioleaching treatment of sludge and livestock and poultry manure

Abstract

The invention relates to an acid-resistance heterotrophic bacterium strain Z3 used for bioleaching treatment of sludge and livestock and poultry manure and belongs to the technical field of environmental engineering. The bacteria are cylindrical single-celled bacteria, the arthrospore size of the bacteria is 6<-12>mu m *3<-6>mu m, the bacterial colony is diffused on a plane, the bacteria grow quickly, the bacteria are flat, high in center and flock-like, the liquid culturing the bacteria is turbid, the precipitate is loose, the reproductive mode of the bacteria is fissiparism, and the formed arthrospores are single ones or connected into a chain. The bacteria can grow normally in an extremely acidic environment in which the pH value is 2.5, the most suitable pH is 2.5 to 6, and according to morphological and physiological biochemical characters and molecular biological assay, the bacterial strain belongs to Galactomyces geotrichum and the collection number of the bacterial strain is CGMCC No.4298. The strain in a pig manure and urban sludge bioleaching environment can quickly use water soluble small molecular weight organic matters or simple organic acids as a carbon source and anenergy source, so the bioleaching efficiency is improved, the rate of removal of heavy metals from the pig manure and urban sludge reaches over 90 percent, and the dehydration rates for the pig manure and urban sludge are 48 and 80 percent respectively.

Description

1. Technical field [0001] The invention relates to an acid-resistant heterotrophic bacterium Z3 applied to the biological leaching treatment of sludge and livestock and poultry manure. It is a technology for bioleaching treatment using the interaction of heterotrophic bacteria and autotrophic bacteria, and belongs to environmental engineering. technology field. 2. Technical Background [0002] At present, my country produces more than 7 million tons (dry matter) of various types of municipal sludge every year, as well as a larger amount of organic solid waste such as industrial sludge and livestock manure. These solid organic wastes all have different concentrations of heavy metals, because urban sewage treatment plants often receive some industrial wastewater, and farms add some metal salts as additives to feed, which significantly increases the heavy metals in manure. In addition, these sludges or manures also have the problem of being difficult to dewater. For example, ...

AI Technical Summary

Problems solved by technology

However, in actual operation, acid-resistant heterotrophic bacteria must be used to maintain long-term activity

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