Production process of sewage biological denitrification composite carbon source with low C/N ratio

A composite carbon source and sewage biological technology, applied in water/sludge/sewage treatment, special compound water treatment, special treatment targets, etc., can solve the problems of poor safety, high cost, high consumption, etc., and achieve less air bubbles and shorter time , The effect of stable product quality

Pending Publication Date: 2021-12-14
NANJING RONGZHONG ENVIRONMENTAL ENG RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing composite carbon source production process, high temperature and high pressure and fermentation treatment are required, and there are disadvantages such as high consumption, low efficiency, poor safety, and high cost.

Method used

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  • Production process of sewage biological denitrification composite carbon source with low C/N ratio

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Experimental program
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Effect test

Embodiment 1

[0027] This embodiment provides a production process of a low C / N ratio sewage biological denitrification composite carbon source. The components of the composite carbon source are specifically: polyethylene glycol: 10%, sugarcane molasses: 15% by mass ratio , glycerol: 10%, glucose: 5%, sodium acetate: 5%, sodium propionate: 2%, the remainder is 53% water, and the sum of the above components is 100%; the production process of the composite carbon source is specific Include the following steps:

[0028] (1) Take water with a mass ratio of 26.5%, and heat it to 35°C;

[0029] (2) Get 5% glucose, 10% polyethylene glycol and 15% sugarcane molasses by mass ratio and dissolve them in the warm water of step (1) rapidly successively, stir and mix evenly for 10 minutes, and adopt a 200-mesh filter screen with an aperture Filtration forms solution A;

[0030] (3) Take water with a mass ratio of 10%, add 3.66% acetic acid and 1.54% propionic acid successively, and add a sodium hydroxi...

Embodiment 2

[0034]This embodiment provides a production process of a low C / N ratio sewage biological denitrification composite carbon source. The components of the composite carbon source are specifically: polyethylene glycol: 15%, sugarcane molasses: 20% by mass ratio , glycerol: 15%, glucose: 10%, sodium acetate: 10%, sodium propionate: 5%, water: 25%, the sum of the above components is 100%, and the production process of the composite carbon source specifically includes The following steps:

[0035] (1) Take water with a mass ratio of 12.5%, and heat it to 50°C;

[0036] (2) Get 10% glucose, 15% polyethylene glycol and 20% sugarcane molasses by mass ratio and dissolve them in the warm water of step (1) rapidly successively, stir and mix evenly for 10 minutes, and adopt a 100-mesh filter screen with an aperture Filtration forms solution A;

[0037] (3) get 4% water in mass ratio again, add 7.32% acetic acid and 3.85% propionic acid in mass ratio successively, and add a mass concentrat...

Embodiment 3

[0040] This embodiment provides a production process of a composite carbon source for sewage biological denitrification with a low C / N ratio. The components of the composite carbon source are specifically: polyethylene glycol: 12%, beet molasses: 15% by mass ratio , glycerol: 12%, glucose: 8%, sodium acetate: 8%, sodium propionate: 3%, water: 42%, the sum of the above components is 100%;

[0041] The production process of the composite carbon source specifically includes the following steps:

[0042] (1) Get 21% water by mass ratio, and heat to 40°C;

[0043] (2) Get 8% glucose, 12% polyethylene glycol and 15% beet molasses by mass ratio and dissolve them in the warm water of step (1) rapidly successively, stir and mix evenly for 10 minutes, and adopt a pore size of 150 mesh filter screen Filtration forms solution A;

[0044] (3) Get 10% water in mass ratio again, add 5.85% acetic acid and 2.31% propionic acid in mass ratio successively, and add a mass concentration of 50%, ...

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Abstract

The invention discloses a production process of a sewage biological denitrification composite carbon source with a low C/N ratio, which specifically comprises the following steps: (1) taking half of water prepared in proportion, and heating to 35-50 DEG C; (2) sequentially and rapidly dissolving glucose, polyethylene glycol and molasses into the warm water in the step (1) according to a mass ratio, uniformly stirring and mixing for 10 minutes, and filtering to form a solution A; (3) taking a proper amount of water, sequentially adding a proper amount of acetic acid and propionic acid, adding a sodium hydroxide solution until the pH value is 6.5-7.5, uniformly stirring and mixing for 5 minutes, adding glycerol according to a mass ratio, and uniformly stirring and mixing for 5 minutes to form a solution B; and (4) slowly adding the solution A into the solution B, adding the residual water to complement the water, and continuously stirring for 5 minutes to obtain a composite carbon source. The process has the characteristics of simple production process, short time, few bubbles and the like, is convenient to store, transport and use, and is particularly suitable for the production of biological denitrification external carbon sources in sewage treatment plants.

Description

technical field [0001] The invention relates to a production process of a composite carbon source for sewage biological denitrification with a low C / N ratio. The composite carbon source is mainly used as a supplementary carbon source required for biological denitrification of sewage with a low C / N ratio, and belongs to the composite carbon source production technology field. Background technique [0002] my country's water resources situation is grim, with low per capita fresh water resources and low water resource utilization efficiency. The biggest problem is serious water pollution. The main pollutants in rivers and lakes are nitrogen, phosphorus and organic matter, and the phenomenon of eutrophication in lakes is serious. According to the 2017 Bulletin on the State of the Environment in China, the overall water quality of the country's surface water is generally slightly polluted. Among the 1,940 water quality sections (points) of surface water in the country, 1,317 sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
CPCC02F3/28C02F2305/06C02F2303/04
Inventor 黄琼徐德福陈凯
Owner NANJING RONGZHONG ENVIRONMENTAL ENG RES INST CO LTD
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