Azotification method by use of organic wastewater

A technology for organic wastewater and nitrogen fixation, applied in energy wastewater treatment, nitrogen purification/separation, anaerobic digestion treatment, etc., can solve the problem of inability to use nitrogen directly, achieve the effect of simple method, lower production cost, and increase consumption

Inactive Publication Date: 2012-02-15
HENAN AGRICULTURAL UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

Although about 78% of the air is nitrogen, except for a few microorganisms and pl...

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  • Azotification method by use of organic wastewater
  • Azotification method by use of organic wastewater

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Embodiment Construction

[0018] The test uses the waste water produced by the malt sugar factory as a sample, part of which is used as a nutrient substrate for photosynthetic bacteria after being sterilized by ultraviolet light, and part of which is used as an air deoxygenation medium.

[0019] Deoxygenation reactors, such as figure 1 As shown, it includes a shell 1, the bottom of the shell 1 is provided with an aerator 2, the inlet of the aerator 2 is connected to the air intake pipe 3, and the inner wall of the shell 1 above the aerator 2 is vertically spaced and staggered. Inclined and upwardly inclined baffles 4, there is a gap between the far end of the baffles 4 and the inner wall of the opposite housing 1; the top of the housing 1 is provided with a shower 5, and the inlet of the shower 5 passes through the circulation pipe 6 It is connected to the bottom of the housing 1, and the inlet of the circulation pipe 6 is provided with a circulation pump 7. During operation, the circulation pump 7 cir...

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Abstract

The invention belongs to the technical field of wastewater recovery and utilization, and relates to an azotification method by the use of organic wastewater. The method provided by the invention comprises the following steps of: (1) adding organic wastewater into a reactor after sterilization of the organic wastewater; (2) inoculating photosynthetic bacteria into the reactor; (3) allowing nitrogen to enter into the bottom of the reactor until the air pressure in the reactor reaches 0.1MPa; (4) carrying out light culture on the organic wastewater for at least 96 hours; (5) carrying out centrifugation and dehydration on a liquid in the reactor after culture so as to obtain a solid organic nitrogenous product. In the invention, photosynthetic bacteria is utilized to transform aerial nitrogen into microbial protein and microbial pigment by the nitrogen fixation of their own nitrogenase under the anaerobic light condition, so as to transform and fix aerial simple substance nitrogen into a organic form and provide suitable nitrogen source form.

Description

technical field [0001] The invention belongs to the technical field of waste water recycling and relates to a method for fixing nitrogen by using organic waste water. Background technique [0002] Nitrogen is an indispensable basic element for the growth of most animals, plants and microorganisms, and in most cases organisms are more likely to use organic nitrogen as a nitrogen source for their own metabolism. Although about 78% of the air is nitrogen, except for a few microorganisms and plants that have their own nitrogen fixation, most organisms cannot directly use nitrogen. At present, the utilization of air nitrogen source is mainly fixed conversion by chemical method (synthetic ammonia process), and the nitrogen in the air is converted into the form of ammonia for further utilization. [0003] Photosynthetic bacteria are a type of archaea with a special growth and metabolism system, which can carry out growth and metabolism activities under different environmental cond...

Claims

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Application Information

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IPC IPC(8): C02F3/28C01B21/04
CPCY02W10/37
Inventor 李刚岳建芝姬少龙郭前辉
Owner HENAN AGRICULTURAL UNIVERSITY
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