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Preparation method of denitrification carbon source for sewage treatment

A technology for sewage treatment and denitrification, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. Good denitrification utilization, abundant sources, and the effect of promoting activity

Active Publication Date: 2021-01-29
神美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this literature, only soybean straw is used as the carbon source in the denitrification process, and its single composition cannot meet the needs of the growth of denitrification bacteria.

Method used

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  • Preparation method of denitrification carbon source for sewage treatment

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Effect test

Embodiment 1

[0024] 60g poly (L-glutamic acid) (molecular viscosity is 40000) and 50g potassium hydroxide are dissolved in 300mL glycerol, and then 10g starch is immersed in this solution for reaction, the reaction temperature is 110 ℃, and the reaction time is 15h, a mixed solution was obtained after the reaction, and then 20g of polyvinyl alcohol and 8g of glycerol monostearate were added to the obtained mixed solution, stirred evenly and reacted at 70°C for 2h, cooled to room temperature and added with 15g of agar, trace elements (Mg 2+ , Fe 3+ , Zn 2+ , Cu 2+ , K + mix) 0.03g and vitamin B 1 0.02g, stir evenly, and dry to obtain denitrification carbon source.

Embodiment 2

[0026] 40g poly(L-aspartic acid) (molecular viscosity is 30000) and 50g sodium carbonate are dissolved in 200mL glycerol, then 10g starch is immersed in the solution for reaction, the reaction temperature is 120°C, and the reaction time is 10h, a mixed solution was obtained after the reaction, and then 10 g of polyvinyl alcohol and 5 g of glycerol monostearate were added to the obtained mixed solution, stirred evenly, and reacted at 80 ° C for 1 h, cooled to room temperature, and added with 15 g of gelatin and trace elements. (Mg 2+ , Fe 3+ , Zn 2+ , Cu 2+ , K + mix) 0.03g and vitamin B 12 0.02g, then stir evenly and dry to obtain denitrification carbon source.

Embodiment 3

[0028] Dissolve 80g of poly(L-aspartic acid) (molecular viscosity of 30000) and 100g of sodium carbonate in 400mL of glycerol, then immerse 10g of starch in the solution for reaction, the reaction temperature is 100°C, and the reaction time is 20h, after the reaction is completed, a mixed solution is obtained, then 20g of polyvinyl alcohol and 5g of sodium stearoyl lactylate are added to the obtained mixed solution, stirred evenly and reacted at 60°C for 2h, cooled to room temperature and added with 15g of gelatin, trace elements (Mg 2+ , Fe 3+ , Zn 2+ , Cu 2+ , K + mix) 0.03g and vitamin B 1 and B 12 0.02g, then stir evenly and dry to obtain denitrification carbon source.

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Abstract

The invention discloses a preparation method of a denitrification carbon source for sewage treatment. The preparation method comprises the following steps: dissolving polyamino acid or a sodium salt thereof and inorganic base in glycerol, immersing starch in the obtained solution, and conducting reacting according to a weight ratio of the starch to the polyamino acid or the sodium salt thereof tothe inorganic base to the glycerol of 1: (4-8): (0.5-10): (20-40) at a reaction temperature of 100-120 DEG C for 10-20 h; adding polyvinyl alcohol and an emulsifier after the reaction is finished, conducting mixing according to a mass ratio of (2-4): (1-2): (0.5-1), performing reacting at 60-80 DEG C for 1-2 h, carrying out cooling to room temperature, adding a coagulant aid, trace elements and vitamins, performing uniform stirring, and conducting drying to obtain the denitrification carbon source. The denitrification carbon source prepared by using the method disclosed by the invention is high in denitrification total nitrogen removal rate and small in dosage, and compared with a pure carbon source, denitrification total nitrogen removal efficiency and capacity present obvious technical advantages in short-term and long-term processes.

Description

technical field [0001] The invention belongs to the technical field of denitrification in sewage treatment, and particularly relates to a method for preparing a denitrification carbon source for sewage treatment. Background technique [0002] Biological denitrification mechanism: The basic principle of biological denitrification of sewage is to convert organic nitrogen into ammonia nitrogen, first use the aerobic stage to undergo nitrification, and use the synergistic effect of nitrifying bacteria and nitrosating bacteria to convert ammonia nitrogen through nitrification. The action is converted into nitrite nitrogen and nitrate nitrogen. Under anoxic conditions, nitrate nitrogen is converted into nitrogen through denitrification, which is released to the atmosphere by overflowing the water surface, participating in the natural nitrogen cycle, greatly reducing nitrogen-containing substances in water, reducing the potential danger of effluent, and achieving the purpose of den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F1/28
CPCC02F3/28C02F1/286
Inventor 周继柱孙松厚朱希坤王国瑞冯春晖石伟杰张玉华王洪雨陈应豪
Owner 神美科技有限公司
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