Sludge active carbon adsorbing agent for sewage dephosphorization and preparation method thereof

A sludge activated carbon and adsorbent technology, applied in water/sewage treatment, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve problems such as poor adsorption performance, and achieve poor adsorption performance, good surface adsorption effect, High Phosphorus Removal Rate

Inactive Publication Date: 2016-11-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the present invention aims at the problem of poor adsorption performance of existing sludge activated carbon adsorbents, and provides a sludge activated carbon adsorbent for phosphorus removal in sewage and a preparation method thereof, which has a high phosphorus removal rate and a simple preparation method

Method used

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  • Sludge active carbon adsorbing agent for sewage dephosphorization and preparation method thereof
  • Sludge active carbon adsorbing agent for sewage dephosphorization and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] Step 1, crushing and grinding the sludge into sludge powder, passing through a 150-mesh sieve, drying for later use, mixing the pyrolusite powder and the sludge powder evenly, and the dosage of the pyrolusite powder is 0.1% of the total mass of the mixed powder;

[0042] Step 2, configure ZnCl with a concentration of 1mol / L 2 solution, then the concentrated sulfuric acid solution is diluted with water to become a dilute sulfuric acid solution with a mass fraction of 20%, and the two solutions are mixed in a volume ratio of 6:1 to obtain a composite activator;

[0043] Step 3, add 60mL of composite activator to the mixed powder, the mass-volume ratio of mixed powder and composite activator is 1:6 (g:mL), stir evenly, activate in an oven at 80°C for 72h after ultrasonication for 4h ;

[0044] Step 4: after activation, burn the mixture in a tube furnace at 450°C for 5 hours, and after cooling to room temperature, wash the prepared sludge activated carbon with hot water re...

Embodiment 2

[0046] Step 1, crushing and grinding the sludge into sludge powder, passing through a 180-mesh sieve, drying for later use, mixing the pyrolusite powder and the sludge powder evenly, and the dosage of the pyrolusite powder is 1.0% of the total mass of the mixed powder;

[0047] Step 2, configure ZnCl with a concentration of 6mol / L 2 solution, and then the concentrated sulfuric acid solution is diluted with water into a dilute sulfuric acid solution with a mass fraction of 25%, and the two solutions are mixed in a volume ratio of 4:1 to obtain a composite activator;

[0048] Step 3, add 50mL of composite activator to the mixed powder, the mass-volume ratio of mixed powder and composite activator is 1:5 (g:mL), stir evenly, activate in an oven at 90°C for 60h after ultrasonication for 2h ;

[0049] Step 4: after activation, burn the mixture in a tube furnace at 500°C for 4 hours, and after cooling to room temperature, wash the prepared sludge activated carbon with hot water rep...

Embodiment 3

[0051] Step 1, crushing and grinding the sludge into sludge powder, passing through a 200-mesh sieve, drying for later use, mixing the pyrolusite powder with the sludge powder evenly, and the dosage of the pyrolusite powder is 2.0% of the total mass of the mixed powder;

[0052] Step 2, configure ZnCl with a concentration of 3mol / L 2 solution, and then the concentrated sulfuric acid solution is diluted with water into a dilute sulfuric acid solution with a mass fraction of 30%, and the two solutions are mixed at a volume ratio of 3:1 to obtain a composite activator;

[0053] Step 3, add 40mL of composite activator to the mixed powder, the mass-volume ratio of the mixed powder and composite activator is 1:4 (g:mL), stir evenly, and activate in an oven at 100°C for 48h after ultrasonication for 3h ;

[0054] Step 4: after activation, burn the mixture in a tube furnace at 550°C for 3 hours, and after cooling to room temperature, wash the prepared sludge activated carbon with hot...

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Abstract

The invention discloses a sludge active carbon adsorbing agent for sewage dephosphorization and a preparation method thereof. The adsorbing agent is prepared from 0.1 mass percent to 5.0 mass percent of pyrolusite powder and 95 mass percent to 99.9 mass percent of sludge active carbon, wherein the mass percent sum of the ingredients is 100 percent. The preparation method comprises the following steps of grinding sludge into sludge powder; uniformly mixing the pyrolusite powder and the sludge powder; adding composite activating agents into the mixed powder; uniformly stirring the mixture; after the ultrasonic treatment, performing activation in a baking oven; then, performing burning carbonization in a tubular furnace; after the cooling, washing the prepared sludge active carbon by water to a neutral state; performing drying, grinding and screening to obtain the sludge active carbon adsorbing agent. The sludge active carbon adsorbing agent and the preparation method solve the problem of poor adsorption performance of the existing sludge active carbon adsorbing agent, and has the advantages that the dephosphorization rate is higher; the preparation method is simple; the adsorption performance is much better than that of wood commercial active carbon used in the market; the price is relatively lower; high market competitiveness and popularization values are realized.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sludge activated carbon adsorbent used for phosphorus removal in sewage, and also relates to a preparation method of the sludge activated carbon adsorbent used for phosphorus removal in sewage. Background technique [0002] With the development of industry and the unreasonable discharge of a large amount of waste water, the problems existing in the water body environment in our country are very obvious, especially the problem of eutrophication in water body. Eutrophication is mainly caused by excess nutrients in water such as nitrogen and phosphorus. Among them, phosphorus is the limiting factor for the growth of algae and other phytoplankton in natural water bodies, and it is also the decisive factor leading to eutrophication of water bodies. According to the data released by the relevant departments of the State Environmental Protection Administration, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/20B01J20/06C02F1/281C02F2101/105
Inventor 陈尧姚思聪刘纪龙唐述雄
Owner SICHUAN UNIV
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