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Preparation method of novel biological denitrification controlled release carbon source carriers

A denitrification and biological technology, applied in the field of water treatment, can solve the problems of poor controllability of carbon release, lack of carbon source, secondary pollution, etc. control effect

Inactive Publication Date: 2010-11-10
王鹤立
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of lack of carbon source and poor controllability of carbon release in the denitrification process, and avoid secondary pollution caused by external carbon sources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] Put 500g of cyclodextrin in the reaction bottle, add 1000ml of alcohol-water medium to disperse it, add alkali in batches at room temperature for alkalization, then add 500ml of epichlorohydrin alcohol solution while stirring, at 40°C React at low temperature for 2 hours; mix polystyrene and excess sulfonyl chloride in a reaction kettle, control the reaction conditions to be alkaline, react at 240°C for 1 hour, cool to room temperature, and transfer the reactants in the reaction bottle to Into the reaction kettle, the temperature was raised to 240°C again and the reaction was stirred for 1h. The reaction product is transferred to an injection molding machine for granulation and molding. After molding, the carrier is reacted and rinsed with deionized water until the pH is neutral, then soaked overnight, and dried at room temperature, and finally the preparation of the carrier is completed.

[0016] The prepared carrier has a particle size of 2-4 mm, a water contact angle...

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Abstract

In order to solve the problems of lacked denitrification carbon sources, short carbon source release time, poor controlled release performance of additionally added carbon source materials, easy secondary pollution generation and the like in the underground water nitrate pollution biological restoration process, the invention provides a preparation method of controlled release carbon source carriers, which belongs to the technical field of water treatment. Novel carbon source carrier materials using cyclodextrin as active controlled release ingredients comprise the preparation steps of cyclodextrin monomer polymerization, carbon source inclusion and pelleting forming. The preparation process of the invention is relatively simple, the prepared carbon source materials have good mechanical and hydraulic performance, and the long-time effectively controlled release of the carbon sources in the biological denitrification process can be realized.

Description

technical field [0001] The invention relates to a preparation method of a novel biological denitrification controlled-release carbon source carrier, belonging to the technical field of water treatment. Background technique [0002] 68% of the fresh water sources suitable for drinking on the earth are groundwater, and about 50% of the world's population uses groundwater as their drinking water source. However, whether in industrially developed countries or developing countries, due to the discharge and leakage of domestic sewage and industrial wastewater; the application of a large number of chemical fertilizers and pesticides in rural areas; the leaching and infiltration of fecal garbage and solid waste; atmospheric nitrogen oxides Wet and dry sedimentation, unreasonable recharge of sewage, and excessive exploitation of groundwater have caused the concentration of nitrate nitrogen in groundwater to increase year by year and become an important environmental problem. [0003...

Claims

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Application Information

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IPC IPC(8): C02F3/28
Inventor 姜廷亮王鹤立李頔
Owner 王鹤立
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