Method for removing smelly substances in water

A technology for removing odor substances and water, which is applied in the field of removing odor substances in water to achieve the effects of controlling membrane fouling, reducing membrane fouling, and eliminating odor substances.

Inactive Publication Date: 2013-05-29
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these new methods, there are no reports on the use of inorganic-organic hybrid photocatalytic separation membranes for the removal of odorants.

Method used

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  • Method for removing smelly substances in water

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Effect test

Embodiment 1

[0029] Step 1, configure the water sample containing odorant to be treated, wherein the concentrations of geosmin, 2-methylisobutyritol, β-ring citral, β-ionone, and dimethyl trisulfide are respectively 500ng / L, 500ng / L, 2000ng / L, 1500ng / L and 2500ng / L. The membrane used is polyvinylidene fluoride-polyethylene glycol-titanium dioxide (PVDF-PEG / TiO 2 ) film, the specific preparation process and corresponding conditions are as follows: Accurately weigh 12wt.% and 0.5wt.% of polyvinylidene fluoride powder and visible light-responsive titanium dioxide nanoparticles, respectively; add polyethylene glycol 3wt.%, dissolve in In the N,N-dimethylacetamide solvent, after being configured as a casting solution, place it in a constant temperature water bath, stir continuously for 24 hours under the condition that the temperature of the water bath is 40°C, and then let it stand at 40°C for 24h, so that It matures and degasses. Using a glass plate as a carrier, a layer of liquid film was...

Embodiment 2

[0032] Step 1, configure the water sample containing odorant to be treated, wherein the concentrations of geosmin, 2-methylisobutyritol, β-ring citral, β-ionone, and dimethyl trisulfide are respectively 500ng / L, 500ng / L, 2000ng / L, 1500ng / L and 2500ng / L. The membrane used is polyvinylidene fluoride-lithium chloride-titanium dioxide (PVDF-LiCl / TiO 2 ) film, the specific preparation process and corresponding conditions are as follows: Accurately weigh 12wt.% and 0.5wt.% of polyvinylidene fluoride powder and ultraviolet light-responsive titanium dioxide nanoparticles, respectively; add 0.8wt.% of lithium chloride to dissolve In N,N-dimethylacetamide solvent, configure the casting solution and place it in a constant temperature water bath, stir continuously at a water bath temperature of 40°C for 24h, and then stand at 40°C for 24h to make It matures and degasses. Using a glass plate as a carrier, a layer of liquid film was scraped on a flat film scraper at a speed of 1.2 m / min,...

Embodiment 3

[0035] Step 1, configure the water sample containing odorant to be treated, wherein the concentrations of geosmin, 2-methylisobutyritol, β-ring citral, β-ionone, and dimethyl trisulfide are respectively 500ng / L, 500ng / L, 2000ng / L, 1500ng / L and 2500ng / L. The membrane used is polyvinylidene fluoride-lithium chloride-titanium dioxide (PVDF-LiCl / TiO 2 ) film, the specific preparation process and corresponding conditions are as follows: Accurately weigh 12wt.% and 0.5wt.% of polyvinylidene fluoride powder and visible light-responsive titanium dioxide nanoparticles, respectively; add 0.8wt.% lithium chloride, dissolve in In N,N-dimethylacetamide solvent, configure the casting solution and place it in a constant temperature water bath, stir continuously for 24 hours at a water bath temperature of 40°C, and then stand at 40°C for 24 hours to allow it to mature defoaming. Using a glass plate as a carrier, a layer of liquid film was scraped on a flat film scraper at a speed of 1.2 m / ...

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Abstract

The invention discloses a method for removing smelly substances in water, which comprises the following steps: 1. preparing an inorganic nano catalyst, an organic high-polymer basal film material, additives, a solvent and the like into a film casting solution at certain temperature, and preparing a flat or hollow-fiber or tubular inorganic-organic hybrid photocatalytic separation film; and 2. putting the inorganic-organic hybrid photocatalytic separation film on a film filter unit, and filtering smelly-substance-containing water to be treated in a dead end filtering or cross-flow filtering mode under the conditions of a proper light source. The photocatalytic unit and the film separation unit which are mutually independent are organically fused into one unit for operation, and thus, the invention can simultaneously have the advantages of both photocatalysis and film separation. The method disclosed by the invention has the advantages of simple technique, no need of reagents, high operation reliability, compact equipment and easy automatic control; and the method can effectively remove smelly substances in water, reduce the film pollution, prolong the service life of the film, and lower the technological cost.

Description

technical field [0001] The invention relates to a method for removing smell and taste substances in water, belonging to the technical field of water treatment. Background technique [0002] The organic pollutants and eutrophication in the water body make the source water smell and smell to varying degrees. Smell and taste can be most intuitively judged by water drinkers, and are the earliest and most direct parameters for humans to evaluate the quality of drinking water. The United States discovered the problem of water body odor as early as the 19th century. In 2005, a survey of 59 drinking water treatment plants in the Great Lakes of North America found that as many as 20% of the water plants had serious odor problems. Different degrees of smell and taste problems have also been found in drinking water produced by some domestic waterworks, resulting in increasing complaints from consumers about the quality of tap water. The smell and smell of drinking water has always be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/32C02F1/44C02F1/58
Inventor 邵嘉慧刘芭李雯玺赵玲何义亮
Owner SHANGHAI JIAO TONG UNIV
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