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A modification method of suspended filler

A technology of suspension filler and modification, which is applied in the fields of chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. Slow, slow biofilm formation, etc., to achieve the effect of promoting adhesion growth, accelerating the formation, binding and adhesion of nitrifying biofilm

Active Publication Date: 2016-05-11
广东瀚正检测科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing suspended fillers have poor adhesion to nitrifying bacteria, which slows down the formation of biofilm on the suspended fillers and slows down the start-up speed of purification treatment of slightly polluted source water.

Method used

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  • A modification method of suspended filler
  • A modification method of suspended filler
  • A modification method of suspended filler

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A method for modifying a suspended filler, comprising the steps of:

[0025] a. Clean the suspension filler with deionized water, then dry it for later use, and the suspension filler is polyethylene suspension filler;

[0026] b. with dichloromethane solvent and L-polylactic acid as the solute, it is prepared into a L-polylactic acid solution with a mass volume ratio of 3%;

[0027] c. Add sodium chloride to the L-polylactic acid solution prepared in step b until saturated, then heat in a water bath until the L-polylactic acid is completely dissolved, and the temperature of the water bath heating is 65°C;

[0028] d. Cool the L-polylactic acid solution treated in step c to room temperature, then immerse the suspended filler processed in step a in the L-polylactic acid solution cooled to room temperature and stir the L-polylactic acid solution, so that the surface of the suspended filler is supported by a Layer L-polylactic acid solution;

[0029] e. Place the suspende...

Embodiment 2

[0031] a. Clean the suspension filler with deionized water, then dry it for later use, and the suspension filler is polypropylene suspension filler;

[0032] b. Using chloroform as a solvent and L-polylactic acid as a solute, prepare a solution of L-polylactic acid with a mass volume ratio of 1%;

[0033] c. Add potassium chloride to the L-polylactic acid solution prepared in step b until saturated, then heat in a water bath until the L-polylactic acid is completely dissolved, and the temperature of the water bath heating is 58°C;

[0034] d. Cool the L-polylactic acid solution treated in step c to room temperature, then immerse the suspended filler processed in step a in the L-polylactic acid solution cooled to room temperature and stir the L-polylactic acid solution, so that the surface of the suspended filler is supported by a Layer L-polylactic acid solution;

[0035] e. Place the suspended filler treated in step d in a fume hood for 24 hours to volatilize the solvent on ...

Embodiment 3

[0037] a. Clean the suspension filler with deionized water, then dry it for later use, and the suspension filler is polyethylene suspension filler;

[0038] b. With dichloromethane and L-polylactic acid as the solute, it is prepared into a L-polylactic acid solution with a mass volume ratio of 2%;

[0039] c. Add potassium chloride to the L-polylactic acid solution prepared in step b until saturated, then heat in a water bath until the L-polylactic acid is completely dissolved, and the temperature of the water bath heating is 55°C;

[0040] d. Cool the L-polylactic acid solution treated in step c to room temperature, then immerse the suspended filler processed in step a in the L-polylactic acid solution cooled to room temperature and stir the L-polylactic acid solution, so that the surface of the suspended filler is supported by a Layer L-polylactic acid solution;

[0041] e. Place the suspended filler treated in step d in a fume hood for 24 hours to volatilize the solvent on...

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Abstract

The invention relates to a modification method of suspended filler. The modification method comprises the following steps: a, cleaning the suspended filler with deionized water, and then drying for later use; b, adding L-polylactic acid into a volatile solvent to prepare an L-polylactic acid solution of which the mass-volume ratio is 1-3%; c, adding the L polylactic acid solution prepared in the step b into sodium chloride or potassium chloride till being saturated, and then heating by a water bath till the L-polylactic acid solution is fully dissolved; d, cooling the L-polylactic acid solution treated in the step c to room temperature and then immersing the suspended filler treated in the step c in the L-polylactic acid solution and stirring; and e, removing the solvent from the surface of the suspended filler treated in the step d by a volatilization method. According to the modification method provided by the invention, active radicals are introduced to the surface of the suspended filler, so that the coarseness of the surface of the filler is increased and formation of a nitrified bio-membrane on the surface of modified filler is accelerated, thereby benefiting adherence and growth of bacteria and further enhancing the removal efficiency of NH<3>-N and TN.

Description

technical field [0001] The invention relates to a method for modifying a suspended filler. Background technique [0002] Slightly polluted source water, containing NH 3 -N (ammonia nitrogen) and TN (total nitrogen), the pretreatment process mostly adopts the biological contact oxidation method. In the process of nitrogen oxidation, namely the nitrification of nitrogen, it is divided into two steps of nitrosation and nitrification. Among them, the process of converting ammonia nitrogen into nitrite nitrogen under the action of nitrosifying bacteria is the rate-limiting step, and the bacteria responsible for oxidation have generations. Unfavorable characteristics such as long cycle time and low extracellular polymer formation. In order to solve this problem, those skilled in the art adopt the method of forming a layer of polylactic acid film on the suspended filler to speed up the treatment speed of the slightly polluted source water. However, the existing suspended fillers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C02F3/00
Inventor 孙承志冯惠邓志新钟宁
Owner 广东瀚正检测科技有限公司