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Method for treating high ammonia-nitrogen wastewater through nutrition conversion of mixotroph

A technology that simultaneously supports microorganisms and high ammonia nitrogen, and is applied in the field of high ammonia nitrogen wastewater treatment. It can solve ammonia air pollution and other problems, achieve low cost, meet large-scale industrial wastewater treatment, and reduce costs.

Active Publication Date: 2016-06-29
NANCHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in the above-mentioned systems, the ammonia nitrogen adsorbed and absorbed by the microalgae cells usually only accounts for a small part of the microalgae treatment system, and a large amount of ammonia escapes into the atmosphere, which will cause potential air pollution.

Method used

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  • Method for treating high ammonia-nitrogen wastewater through nutrition conversion of mixotroph
  • Method for treating high ammonia-nitrogen wastewater through nutrition conversion of mixotroph

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Embodiment 1

[0032] High ammonia nitrogen tolerant algae strains—Chlorella sorokiniana were screened locally. This algae strain can not only grow autotrophically in photosynthesis, but also grow heterotrophically under dark conditions, and can also grow polytrophically under the above conditions at the same time. from figure 2 It can be seen that this Chlorella is a circular eukaryotic acultivating microorganism with a cell size of 2 to 5 μm. Its growth characteristics under autotrophic, heterotrophic and mixed culture are as follows: Figure 1a , Figure 1b shown.

[0033] Figure 1a Represents the growth curve of Chlorella in autotrophic and mixed culture media, P represents autotrophic culture, M represents mixed culture, M1-M50 represents the organic carbon concentration in mixed culture (ie, the initial reducing sugar concentration of organic carbon) . from Figure 1a It can be seen that the biomass of polyculture cells is much higher than that of autotrophic culture in the same t...

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Abstract

The invention discloses a method for treating high ammonia-nitrogen wastewater through nutrition conversion of mixotroph. The method for treating the high ammonia-nitrogen wastewater through nutrition conversion of the mixotroph comprises the following steps: 1, conducting transferring and culture on the mixotroph; 2, conducting high density culture in a culture medium rich in organic carbon or wastewater rich in organic carbon; 3, harvesting heterotrophic cells of the mixotroph; 4, transferring the heterotrophic cells into the high ammonia-nitrogen wastewater for autotrophic culture, absorbing high-concentration nitrogen and ammonia, and purifying the wastewater. According to the method, the method for changing the nutrition metabolism pathway of the mixotroph is introduced for treating the high ammonia-nitrogen wastewater, the treated wastewater can be recycled, the requirement of industrialized wastewater treatment conducted through microalgae is met, and the method is a new approach for conducting sewage treatment through produced microalgae economically and efficiently. The harvested microalgae cells can be further treated and used for preparing biological energy source, animal feed and the like.

Description

technical field [0001] The invention relates to a treatment method for high-ammonia-nitrogen wastewater, in particular to a method for treating high-ammonia-nitrogen wastewater through nutrient conversion of concurrently trophic microorganisms. Background technique [0002] The water resource crisis is a major challenge facing mankind in the 21st century. With the rapid development of global industrialization and modernization, the demand for water resources in human society is increasing day by day. However, due to the serious pollution of the water environment caused by human activities, it restricts or even hinders the momentum of social development and progress. [0003] High ammonia nitrogen (NH 4 + -N) Treatment and purification of wastewater is a major problem in global wastewater treatment. Many industrial and agricultural production sectors, such as animal husbandry, fertilizer industry, explosives industry, landfills, etc., have a large amount of high ammonia ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C12N1/20C12N1/12C12R1/89C12R1/01
CPCC02F3/34C12N1/12C12N1/20
Inventor 周文广阮榕生王菁晗黎俊
Owner NANCHANG UNIV
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