Method for preparing biological composite carbon source from citric acid fermentation wastewater and application of biological composite carbon source

A technology for fermenting wastewater and composite carbon sources, applied in the field of environmental engineering, can solve the problems of waste of resources and increase costs, and achieve the effects of reducing concentration costs, saving resources, and solving complex preparation methods

Inactive Publication Date: 2021-10-26
江苏金山新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the citric acid fermentation wastewater and crude glycerin are discharged directly through biochemical treatment, it will not only increase the cost, but also cause a lot of waste of resources

Method used

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  • Method for preparing biological composite carbon source from citric acid fermentation wastewater and application of biological composite carbon source
  • Method for preparing biological composite carbon source from citric acid fermentation wastewater and application of biological composite carbon source
  • Method for preparing biological composite carbon source from citric acid fermentation wastewater and application of biological composite carbon source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method of utilizing citric acid fermentation wastewater to prepare a biological composite carbon source, comprising the following steps:

[0055] (1) Add 50L of citric acid fermentation wastewater to the reaction tank, add 20% (w / w) NaOH solution by mass to adjust its pH value to 9-11, and then add 150g of flocculant polyaluminum chloride (PAC) to stir The reaction time was 1h. After the reaction is completed, stand for 1h and then filter to remove PO in the wastewater 4 3- , SO 4 2- ions and suspended solids (SS).

[0056] (2) adding the filtrate obtained in the step (1) into the hydrolysis and acidification tank, adjusting its pH value to 8-11 and fermenting, a hydraulic transmission system is installed at the bottom of the hydrolysis and acidification tank, and the fermentation is treated by the stirring device arranged in the tank. The wastewater is stirred slowly and uniformly. The fermentation temperature was 35° C., and the fermentation time was 10 days. ...

Embodiment 2

[0063] The difference between this example and Example 1 is that in step (4), based on the total volume of the mixture being 100%, the percentage content of the concentrated solution is 40%; the percentage content of crude glycerol is 35%; The percentage is 25%. Other steps and parameter conditions are the same as in Example 1.

Embodiment 3

[0065] The difference between this example and Example 1 is that in step (4), based on the total volume of the mixture being 100%, the percentage content of the concentrated solution is 45%; the percentage content of crude glycerol is 40%; The percentage is 15%. Other steps and parameter conditions are the same as in Example 1.

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Abstract

The invention relates to a method for preparing a biological composite carbon source from citric acid fermentation wastewater and application of the biological composite carbon source. In the preparation process, the citric acid fermentation wastewater is used as a raw material and is mixed with crude glycerin to prepare the biological composite carbon source, and the biological composite carbon source is used as a carbon source in the wastewater denitrification process and has an efficient removal effect on nitrogen and phosphorus in the denitrification process. When the biological composite carbon source is prepared, a phosphorus source and a magnesium source are added after fermentation, struvite sediment is generated, and the struvite sediment is an excellent nitrogen-phosphorus fertilizer and can be recycled as a resource.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a biological composite carbon source prepared by utilizing citric acid fermentation wastewater and a preparation method and application thereof. Background technique [0002] Insufficient carbon source in the denitrification stage is a problem faced by most sewage treatment plants in my country. At present, commercial carbon sources such as acetic acid, ethanol, methanol and sodium acetate are added to sewage treatment by sewage plants as supplementary carbon sources to ensure that the effluent quality meets the standard. However, the above-mentioned supplementary carbon sources are generally expensive, increasing the operating cost of sewage treatment, and are essentially chemical products, which are greatly restricted in the process of transportation, storage and use, and do not meet the global carbon peak and carbon neutrality requirements. Direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/28C02F103/36
CPCC02F9/00C02F3/28C02F1/66C02F1/5236C02F1/001C02F2301/08C02F1/14C02F2305/06C02F2103/36C02F1/5254
Inventor 钱盘生潘亚斌徐梦思
Owner 江苏金山新材料科技有限公司
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