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Method for degrading odor substances in water based on disinfection technology

A technology of smelling and smelling substances and technology, which is applied in the field of degrading smelling and smelling substances in water based on disinfection technology, and can solve problems such as difficult to remove, difficult to degrade in strength, and low reactivity

Inactive Publication Date: 2021-05-11
天津水务集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oxidation ability of chloramine is weak, and the reactivity with 2-MIB and GSM is low, so it is difficult to remove 2-MIB and GSM in drinking water; in the process of ultraviolet disinfection, the intensity of ultraviolet radiation is also difficult to degrade 2-MIB in water and GSM
Although some studies have shown that vacuum ultraviolet rays can degrade 2-MIB and GSM, due to the strong absorption of water molecules on vacuum ultraviolet rays, the penetration thickness of vacuum ultraviolet rays in the water layer is limited, and a large number of active species are generated in a relatively limited space. , the proportion of self-recombination quenching is large, which affects the efficiency of vacuum ultraviolet and limits the application of vacuum ultraviolet in actual production

Method used

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  • Method for degrading odor substances in water based on disinfection technology
  • Method for degrading odor substances in water based on disinfection technology
  • Method for degrading odor substances in water based on disinfection technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] According to the optimal experimental conditions determined by the above pure water experiment, when the ultraviolet radiation intensity is 1.42×10 - 6 Einstein L -1 ·S -1 , chloramine concentration of 0.025mM, pH of 7 conditions, UV / NH 2 Cl advanced oxidation process on the removal of odor and smell substances in actual water sources. Use the Yangtze River water source to configure a 500ml mixed solution with a concentration of 100-150ng / L of smelling and smelling substances, and add the prepared smelling and smelling substance solution into the reactor equipped with an ultraviolet lamp tube, respectively, at time 0, 1, 2, At 5, 10, and 15 minutes, take 10ml of the sample and add it to the CTC special sample bottle that has been filled with 2.50gNaCl, then add 100μl of sodium thiosulfate with a concentration of 0.1M as a quencher, and 20μl of IBMP with a concentration of 10mg / L. The degradation experiment of smell and taste substances was carried out, and the degra...

Embodiment 2

[0078] In the ultraviolet radiation intensity is 1.42×10 -6 Einstein L -1 ·S -1 , chloramine concentration is 0.025mM, pH is 7 conditions, with Luanhe water (2-MIB exists in Luanhe water) after coagulation+sedimentation+filtering pilot plant treatment, the concentration of smell and taste substances is 100~150ng / L of 500ml mixed solution, other experimental methods were the same as in Example 1, and carried out the degradation experiment of odorant substances in Luanhe River water, and the degradation effect of odorant substances in the reaction time was shown in Table 3.

[0079] Table 3 Degradation effect of odor and smell substances in Luan River water within the reaction time

[0080] time (min) 2-MIB average degradation effect 0 0 1 9.56％ 2 16.44％ 5 44.36％ 10 71.32％ 15 81.64％

[0081] In this example, the combined use of ultraviolet and disinfectant (chloramine solution) degrades the effluent of Luan River water treated by...

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Abstract

The invention discloses a method for degrading odor substances in water based on a disinfection technology, which comprises the following steps: adding a disinfectant solution into water containing smelly substances, then carrying out ultraviolet irradiation, and after a period of reaction, sampling and analyzing to obtain the degradation effect of the smelly substances in water. The odor substance is 2-methylisoborneol or geosmin, the disinfectant is a chloramine solution, and the irradiation intensity of ultraviolet irradiation is (1.42-4.26) * 10<-6 > Einstein.L<-1 >. S<-1 >. The method is easy to operate, remarkable in effect, safe to use and environmentally friendly. A relatively good degradation effect can be achieved in a short time under a normal-temperature condition, and a good degradation effect is achieved under neutral, acidic or alkaline conditions. According to the technology, other equipment and medicaments do not need to be additionally added, the operation is simple, the efficient degradation of the odor substances in the water can be realized, and meanwhile, the synergism of ultraviolet and chloramine combined disinfection can be exerted.

Description

technical field [0001] The invention relates to the application field of water treatment technology, in particular to a method for degrading odor and smell substances in water based on disinfection technology. Background technique [0002] At present, the smell and taste of drinking water is a hot issue that researchers all over the world pay close attention to. 2-Methylisoborneol (2-MIB) and geosmin (GSM) are secondary metabolites produced by specific microorganisms, and are the most common earthy musty odor-causing substances in drinking water sources. When their content is above 10ng / L, they will produce unpleasant odor, affect the sensory index and drinkability of water, and cause consumers' concerns and concerns about the safety of drinking water. Therefore, the removal of these two typical olfactory substances is of great significance to improve the quality of drinking water. [0003] Scholars at home and abroad have conducted a lot of research on 2-MIB and GSM remov...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/50C02F1/76C02F101/34
CPCC02F1/32C02F1/50C02F1/76C02F2101/34C02F2303/04C02F2303/02
Inventor 苏晓贾霞珍韩宏大胡建坤李荣光李荣马凯
Owner 天津水务集团有限公司
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