Acid-producing bacterium JC-H and application thereof as well as culture and identification method of acid-producing bacterium JC-H

Abstract

The invention discloses an acid-producing bacterium JC-H, which is named as Aspergillus niger JC-H, is preserved in China General Microbiological Culture Collection Center (CGMCC) on January 4, 2021, and has a preservation number of CGMCC NO: 21424. The strain can be applied to acid production, and the acid production efficiency is the highest when a fermentation medium is used for constant-temperature shake culture under the conditions that the temperature is 30 DEG C, the pH is 6 and the rotating speed is 160rpm. The acid-producing bacterium provided by the invention can provide a strain resource for biological acid production.

Description

technical field [0001] The invention belongs to the technical field of environmental microorganisms, relates to an acid-producing bacterium JC-H and its application, and also relates to a method for cultivating and identifying the acid-producing bacterium JC-H. Background technique [0002] Mineral resources are the material basis for human production, life and rapid social and economic development, as well as strategic resources for ensuring national security and safeguarding national development interests. However, unreasonable mining will cause great damage to the mining area and the surrounding natural environment. The annual discharge of metal and non-metal tailings reaches 300 million tons, and the cumulative stock of tailings is nearly 20 billion tons. The tailings and waste residues in the mining area are accumulated in the natural environment, which increases the types and quantities of heavy metals in the tailings that penetrate into the soil environment, and conti...

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Problems solved by technology

In the actual repair process: physical methods mainly include soil replacement, heat treatment, electric repair, etc. However, physical methods generally require a lot of manpower, material resources, financial resources, etc., and are generally limited to small areas of heavy metal pollution treatment; chemical The methods mainly include leaching, immobilization of modifiers, precipitation, ion exchange and other methods. Although the chemical repair method is simple to operate and can also be repaired in situ, it generally brings secondary pollution and even destroys the soil structure, and is costly.

Therefore, these methods are difficult to realize technically and economically, and are also difficult to be accepted by the public. In the face of large-scale heavy metal pollution, it is even more difficult to apply

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