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Method for eliminating nitrite in drinking water by utilizing enzyme residues

A technology of nitrite and enzyme residue, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as reducing treatment costs, achieve control of use costs, realize resource utilization, and wide-ranging sources. Effect

Active Publication Date: 2020-10-02
广东新宝堂生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of them can achieve good nitrite removal effect, but the treatment cost needs to be further reduced
However, there is no report on applying ferment residue to eliminate nitrite in drinking water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Take 1 part by mass of the enzyme residue of Xinhuikan pulp, that is, sample 1, and its source is detailed in patent CN201910056640.7, the same below;

[0023] (2) Take 40 parts by volume of drinking water containing nitrite concentration of 5 μg / mL (prepared by dissolving sodium nitrite in distilled water, the same below), put it in the container, then add the above sample 1, mix it evenly, and put it in the container. Reaction at 37°C for 24 hours;

[0024] (3) Using the improved GB5009.33-2016 method, the residual nitrite content in the solution was determined to be 68.18 μg, that is, the removal rate was 65.91%.

[0025] The characteristics of this process are: the enzyme residue is directly applied to remove nitrite in drinking water, does not require fine processing, is simple and practical, has obvious effect, low cost, and is easy to popularize and apply.

Embodiment 2

[0027] (1) Take 1 part by mass of the fermented citrus pulp enzyme residue, put it in a soaking container, add 10 mL of 80% ethanol, and soak for 24 hours. Transfer the extract to a vacuum rotary concentrator, heat it in a water bath at 45°C under a vacuum of 70kpa to remove the ethanol solvent, and obtain the evaporated concentrate after soaking in ethanol, namely sample 2;

[0028] (2) Take 2 parts by volume of drinking water containing nitrite concentration of 5 μg / mL, put it in a container, then add the above sample 2, mix well, and react at a temperature of 30°C for 1 hour;

[0029] (3) Using the improved GB5009.33-2016 method, the residual sodium nitrite content in the solution was determined to be 0.17 μg, that is, the removal rate was 98.31%.

[0030] The characteristics of this process are: the concentration of active substances in the enzyme residue extract is higher, and the concentration of active substances can be adjusted according to the needs to improve product...

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PUM

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Abstract

The invention discloses a method for eliminating nitrite in drinking water by utilizing enzyme residues, which comprises the following steps: directly adding enzyme residues into drinking water containing nitrite, and reacting at 5-50 DEG C for 1-120 hours. The invention also discloses a method for eliminating nitrite in drinking water by using enzyme residues, which comprises the following steps:evaporating and concentrating an extract obtained by soaking enzyme residues in a solvent to obtain a concentrate, adding the concentrate into drinking water containing nitrite, and reacting at 5-50DEG C for 1-120 hours. On one hand, enzyme production by-products are recycled, waste residue discharge is reduced, and the environment is protected; and on the other hand, a water purification product with a good removal effect on nitrite in drinking water is obtained. The environment is protected, the safety of drinking water is guaranteed, and the application value is wide.

Description

technical field [0001] The invention belongs to the field of resource recycling, and relates to a method for efficiently utilizing food processing industry waste, in particular to a method for eliminating nitrite in drinking water by using enzyme residue. Background technique [0002] Nitrite is a class of inorganic compounds that are toxic and carcinogenic to humans, livestock and aquatic animals. Excessive levels of nitrite in drinking water can cause human disease and animal death. Currently, methods for eliminating nitrite in drinking water include microbial degradation (CN200710089906.5, CN200910273368.4, CN201510420857.3, CN201610007546.9), photocatalytic oxidation (CN201010545061.8) and electrode reduction (CN201510358221.0) , physical adsorption method (CN02111102.2), and comprehensive treatment method (CN201711049838.X), etc. All of them can achieve good nitrite removal effect, but the treatment cost needs to be further reduced. [0003] Enzyme residue is a by-pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F101/16
CPCC02F1/58C02F2101/166
Inventor 李义勇陈柏忠
Owner 广东新宝堂生物科技有限公司
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