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Modification process of fly ash zeolite and wastewater treatment process for paper making

A technology for fly ash zeolite and papermaking wastewater, which is applied in the process of wastewater treatment, adsorbed water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems that the effluent cannot meet the standard, cannot be directly discharged, and is unfavorable for general promotion. , to achieve the effect of improving economic and social benefits, reducing processing costs, and strong operability

Inactive Publication Date: 2008-11-19
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing technology that the effluent cannot reach the standard when treating papermaking wastewater, cannot be directly discharged, the treatment effect is poor, the cost is high, and it is not conducive to popularization, etc., and a papermaking wastewater treatment method with low cost, simple operation, and effluent reaching the standard is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare 1.0mol / L hydrochloric acid and 1.0mol / L sulfuric acid solutions respectively, mix hydrochloric acid and sulfuric acid at a volume ratio of 1:6 to obtain a modifier; weigh 0.003Kg of fly ash zeolite, add 0.012L modifier and mix evenly , to obtain a solid-liquid mixture; stir the prepared solid-liquid mixture at 240r / min at room temperature for 1h; dry the stirred solid-liquid mixture at 100°C for 8h, grind it to below 200 mesh, and obtain modified pulverized coal Ash zeolite: Weigh 0.002Kg of modified fly ash zeolite, add 0.5L of papermaking wastewater, adjust the pH value to 5.10, shake and react at room temperature for 1min, pour the shaken solution into a 100mL graduated cylinder, and let it settle for 30min. The discharged wastewater is then tested for relevant water quality parameters. The results show that the absorbance of the effluent is 0.030, the COD value is 360mg / L, the COD value removal rate reaches 58.09%, the chroma removal rate reaches 92.02%, and...

Embodiment 2

[0026] Prepare 1.0mol / L hydrochloric acid and 1.0mol / L sulfuric acid solutions respectively, mix hydrochloric acid and sulfuric acid at a volume ratio of 1:3 to obtain a modifier; weigh 0.2g of fly ash zeolite, add 0.8L modifier and mix evenly , to obtain a solid-liquid mixture; stir the prepared solid-liquid mixture at 300r / min at room temperature for 4h; dry the stirred solid-liquid mixture at 100°C for 8h, grind it to below 200 mesh, and obtain modified pulverized coal Ash zeolite: Weigh 0.1Kg of modified fly ash zeolite, add 100L of papermaking wastewater, adjust the pH value to 6.10, shake and react at room temperature for 180min, pour the shaken solution into a 1000mL measuring cylinder, and let it settle for 30min. The discharged wastewater is tested for relevant water quality parameters. The results show that the absorbance of the effluent is 0.027, the COD value is 345mg / L, the COD value removal rate reaches 59.84%, the chroma removal rate reaches 92.82%, and the COD ...

Embodiment 3

[0028] Prepare 1.0mol / L hydrochloric acid and 1.0mol / L sulfuric acid solution respectively, hydrochloric acid and sulfuric acid are mixed uniformly to obtain modifying agent by volume ratio 1: 1; Take by weighing 1Kg of fly ash zeolite, add 4L modifying agent and mix uniformly, obtain Solid-liquid mixture; stir the prepared solid-liquid mixture at 150r / min at room temperature for 4h; dry the stirred solid-liquid mixture at 100°C for 8h, and grind it to below 200 mesh to obtain modified fly ash zeolite ; Weigh 500g of modified fly ash zeolite, add 125L of papermaking wastewater, adjust the pH value to 5.10, stir and react at room temperature for 30min, pour the stirred solution into the settling tank, and let it settle for 30min. Carry out the determination of relevant water quality parameters. The results show that the absorbance of the effluent is 0.053, the COD value is 387mg / L, the COD value removal rate reaches 56.76%, the chroma removal rate reaches 85.90%, and the COD va...

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Abstract

The invention relates to wastewater treatment, in particular to an application of modified fly ash zeolites in the treatment of paper making wastewater. Firstly, fly ash zeolites which are synthesized in low cost undergo the modified treatment by modifying agent; secondly, the modified fly ash zeolites are put in a reactor to fully contact the paper making wastewater; thirdly the paper making wastewater is treated; the removal rates of COD and chrominance are used to check the treatment effect of the fly ash zeolites on the paper making wastewater. The application has the advantages that the modifying agent is low in price and easily bought, and the modification process and the treatment process of the paper making wastewater are simple, and simultaneously the environmental pollution caused by fly ash solid wastes is solved, and the application range of the fly ash zeolites is widened, so that the application has the active use value.

Description

Technical field: [0001] The invention relates to a wastewater treatment method, in particular to the application of a modified fly ash zeolite in the treatment of papermaking wastewater, which belongs to the technical field of environmental protection. Background technique [0002] Fly ash is waste from coal-fired power plants. Its current application is limited to the building materials industry, but its utilization rate is less than 20%. The accumulation of a large amount of fly ash not only takes up a lot of land, but also causes serious environmental pollution. Synthetic zeolite from fly ash is an effective way to turn fly ash into treasure and obtain high value-added products. At present, natural zeolite and commercial zeolite have been widely developed and applied, but their output is limited and the price is expensive. The technology of using fly ash to synthesize zeolite is relatively mature. Commonly used synthesis methods include hydrothermal synthesis, alkali fus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/52C02F103/28
Inventor 吕海亮王本红马毅班青杜吉勇
Owner QILU UNIV OF TECH
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