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Chlorite suspension rich in micro-aerobic bubbles and method for removing odor-causing pollutants in anaerobic water body by utilizing chlorite loaded with micro-aerobic bubbles

A technology for chlorite and pollutants, applied in the direction of oxidized water/sewage treatment, etc., can solve problems such as not being effectively solved, achieve good governance effect, increase dissolved oxygen content, and improve the effect of dissolved oxygen

Inactive Publication Date: 2014-03-12
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This critical issue has not been effectively resolved

Method used

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  • Chlorite suspension rich in micro-aerobic bubbles and method for removing odor-causing pollutants in anaerobic water body by utilizing chlorite loaded with micro-aerobic bubbles
  • Chlorite suspension rich in micro-aerobic bubbles and method for removing odor-causing pollutants in anaerobic water body by utilizing chlorite loaded with micro-aerobic bubbles

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Embodiment 1

[0025] According to the present invention, at first prepare the chlorite suspension that is rich in micro-oxygen bubbles, the method is as follows:

[0026] 1. Modification and pretreatment of collected chlorite:

[0027] (1) Smash. Grind the collected natural chlorite in a pulverizer, and select a sample with a particle size of 10-100 μm after sieving.

[0028] (2) Remove organic matter. Add 10% H to the crushed chlorite sample 2 o 2 Repeat the process until no obvious bubbles overflow.

[0029] (3) Calcification and drying. Add 10~25% CaCl to the chlorite after removing organic matter according to the solid-to-liquid ratio of 1:1 2 Aqueous solution, soak for more than 24 hours, shake the chlorite suspension from time to time to ensure uniform mixing, and then use deionized water to repeatedly shake and wash on the shaker for 3 to 5 times until there is no Ca in the supernatant after centrifugation. 2+ until. After centrifugation, the supernatant was discarded, and th...

Embodiment 2

[0033] Select 5 ml of the prepared chlorite suspension concentrate loaded with micro-oxygen bubbles, add it to 100 ml of deionized water for dilution. 20 mg L was finally prepared -1 and 100 mg L -1Two systems of chlorite suspension. Then adopt the iodometric method to measure the content of dissolved oxygen therein, and shake and mix from time to time during the measurement process. Two sets of control experiments were done at the same time, that is, adding 5ml of air-saturated deionized water and adding 5ml of saturated soil suspension to 100ml of deionized water. The soil is general farmland soil, and the specific treatment is basically the same as the pretreatment of chlorite, including crushing and sieving, removing organic matter, calcification and drying, high-temperature roasting, and finally obtaining a suspension. During the experiment, the value of dissolved oxygen in the water body was recorded. Specific results such as figure 1 As shown, this figure specific...

Embodiment 3

[0035] According to relevant literature reports, the drinking water crisis broke out in Wuxi in 2007, and the odor-causing substances in the lake water were mainly sulfide pollutants, among which dimethyl trisulfide was the main characteristic pollutant. In the indoor simulation experiment, the initial concentration in 200 ml was 30 mg L -1 In the simulated wastewater of dimethyl trisulfide, 5ml of high-concentration chlorite suspension with high-efficiency loading micro-air bubbles was added, so that the content of chlorite particles in the final water body was 20~100mg L -1 , start stirring. Two sets of control experiments were done at the same time, that is, adding 5ml of air-saturated deionized water and adding 5ml of saturated soil suspension to 100ml of deionized water. The soil is general farmland soil, and the specific treatment is basically the same as the pretreatment of chlorite, including crushing and sieving, removing organic matter, calcification and drying, hi...

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Abstract

The invention relates to chlorite suspension rich in micro-aerobic bubbles and a method for removing odor-causing pollutants in an anaerobic water body by utilizing chlorite loaded with the micro-aerobic bubbles. After organic matter in the chlorite is removed, the chlorite is soaked in CaCl2, then is dried, is roasted for 2 to 5h at a temperature of 200 to 230 DEG C, is subjected to micropore aeration (air or ozone) in a methanol solution at normal temperature after being cooled, and is replaced into a water suspension by deionized water after being saturate so as to obtain the chlorite suspension rich in the micro-aerobic bubbles; the chlorite suspension rich in the micro-aerobic bubbles is added into the anaerobic water body so as to enable the odor-causing pollutants in the anaerobic water body to be oxidized and degraded. Compared with independent oxygen saturated aqueous solution and a soil suspension, the chlorite suspension has the advantages that the chlorite suspension comprises a great amount of micro-aerobic bubbles; the oxygen dissolving level of the chlorite suspension is multiple times of that of the common saturated aqueous solution; the rich dissolved oxygen in the suspension has the advantage of slowly releasing step by step; the chlorite suspension has an excellent effect of removing the odor-causing pollutants, such as thioether, in the local anaerobic water body and surface sediments of an urban lake or river channel.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to an oxygen-enriched material and its application, in particular to a chlorite suspension rich in micro-oxygen bubbles and the use of chlorite-loaded micro-oxygen bubbles to efficiently remove odor-causing pollution from anaerobic water bodies substances, especially sulfur-containing compounds. Background technique [0002] At present, in response to the problem of black and odorous water in some areas of urban rivers and lakes in my country, the treatment methods can be summarized into direct methods and indirect methods. The direct method is to control and treat the degradation of the environmental quality of the black and odorous water itself (such as dissolved oxygen); the indirect method is to carry out preventive control and treatment of the main factors that produce black and odorous water (such as aquatic plants and sediment). Control measures for black and ...

Claims

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Application Information

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IPC IPC(8): C02F1/72
Inventor 古小治陈开宁杨鑫张启超
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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