Method for treating pH of nisin wastewater

A technology of waste water and screening method, which is applied in the direction of microorganism-based methods, chemical instruments and methods, special compound water treatment, etc., can solve the problems of bacteria not growing, being in the laboratory stage, slowness, etc. Effects that are easily processed on a large scale

Inactive Publication Date: 2017-12-15
TIANJIN AGRICULTURE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now a lot of waste water is treated by biochemical method. The core of molasses wastewater treatment is biochemical method. In the 1970s, acrylic fiber wastewater was treated by biochemical method. In the treatment of coking wastewater, most domestic coking enterprises adopt biochemical method, but biochemical method The methods for treat

Method used

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Examples

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Effect test

Embodiment 1

[0022] A method for treating the pH of nisin wastewater provided in this embodiment includes treating the nisin wastewater by fermentation, applying Paecilomyces variotii to the nisin wastewater treatment, and culturing it in the stock solution of the nisin wastewater.

[0023] As preferably, said method specifically comprises the following steps:

[0024] (2) Insert Paecilomyces variotii into nisin wastewater by screening method, and then put the nisin wastewater at 28°C and 150r / min for cultivation. After 7-9 days, neutral pH and COD degradation rate are obtained. It is 70% to 90% nisin wastewater.

[0025] Further, the pH value after degradation is 6.0-8.0.

[0026] Further, the Paecilomyces variotii is obtained by separating from soil.

[0027] Further, the Paecilomyces variotii was inserted into the nisin wastewater by the screening method, and then the nisin wastewater was cultured at 28°C and 150r / min. After 7-9 days, a neutral pH of 7 was obtained and the COD degrada...

Embodiment 2

[0045] A kind of method of processing nisin wastewater pH provided by the present embodiment, its specific steps are:

[0046] The obtained Paecilomyces variotii was inserted into nisin wastewater, and then the nisin wastewater was cultivated at 28°C and 150r / min. After 8 days, the nisin wastewater with a pH of 6.3 and a COD degradation rate of 72% was obtained. .

Embodiment 3

[0048] A kind of method of processing nisin wastewater pH provided by the present embodiment, its specific steps are:

[0049] The obtained Paecilomyces variotii was inserted into nisin wastewater, and then the nisin wastewater was cultured at 28°C and 150r / min. After 9 days, the nisin wastewater with pH 7 and COD decreased by 90% was obtained.

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PUM

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Abstract

The invention discloses a method for treating the pH of nisin wastewater, which comprises the steps of treating nisin wastewater with a fermentation method, applying Paecilomyces variotii to the treatment of nisin wastewater, cultivating it in the stock solution of nisin wastewater to maintain its vitality, aeration and stirring for 7~ In 9 days, the pH of the nisin wastewater can be neutralized and the COD can be reduced by 60% to 90%. The method for treating the pH of nisin wastewater obtained by the present invention only adds bacteria species and does not add other substances, and is very economical; moreover, the method is simple and easy to handle on a large scale.

Description

technical field [0001] The invention relates to the field of biotechnology, in particular to a method for treating the pH of nisin wastewater. Background technique [0002] Nisin is a natural biologically active antimicrobial peptide of nisin. It is a small molecular peptide with strong bactericidal effect. It is synthesized and secreted by the microorganisms of the genus Lactococcus in the metabolic process. It is a safe, Highly effective, purely natural active substances. At present, the annual output of Nisin in my country has exceeded 250 tons, but with the production of Nisin, a large amount of fermentation waste liquid will also be produced, so the annual discharge of more than 50,000 tons of waste liquid in my country is produced by Nisin. After the production of Streptococcus lactis, the remaining waste after extracting Nisin is Nisin fermentation wastewater, which has the characteristics of low C / N, high chloride ion concentration, low pH, and high COD. As waste li...

Claims

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Application Information

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IPC IPC(8): C02F3/34C12N1/14C12R1/79
CPCC02F3/34C02F1/66C02F2305/06C12N1/14
Inventor 童应凯陈二路张怡赵宝顶宋平张靓吴疆王玉
Owner TIANJIN AGRICULTURE COLLEGE
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