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Treatment method for removing organic matters in paper waste

A treatment method and technology for papermaking wastewater, which are applied in energy wastewater treatment, processing wastewater treatment, light water/sewage treatment, etc., can solve the problems of mild oxidation reaction conditions, low investment and low energy consumption, and achieve mild reaction conditions, The effect of low investment and low energy consumption

Inactive Publication Date: 2013-07-24
姚玉松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to research, under ultraviolet irradiation, titanium dioxide with photocatalytic oxidation can degrade various organic pollutants almost non-selectively. It can degrade any organic matter, with mild oxidation reaction conditions, less investment, and low energy consumption. Catalytic oxidation reaction can occur when irradiated with ultraviolet light or exposed to sunlight, without secondary pollution, and organic matter is completely oxidized and degraded into CO 2 and H 2 O, has a wide range of applications, among which TiO 2 Because of its strongest catalytic activity, but TiO 2 The utilization rate of solar energy is only 3%, in order to improve TiO 2 The wide application of photocatalysis in water treatment technology requires the combination of TiO 2 Modification, photocatalytic stationary phase technology, further exploration of photoreactors, and effective innovation of existing technologies

Method used

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Effect test

Embodiment 1

[0017] The treatment method for removing organic matter in papermaking wastewater described in the embodiments of the present invention, the main steps are:

[0018] The composite coagulant is composed of aluminum chloride PAC, ferric sulfate PFS and cationic polyacrylamide CPAM. When mixing, the mixed coagulation is made according to the volume ratio of PAC:PFS:CPAM=6:4:2 With the continuous addition of the compound coagulant, the COD value in the filtrate will decrease rapidly and then rise slowly. When the amount of the compound coagulant is 1% of the volume of the treated wastewater, the removal rate of COD in the papermaking wastewater is high. Better degradation effect;

[0019] Then coagulate the treated wastewater, adjust the pH value of the wastewater between 3 and 6 with hydrochloric acid and sodium hydroxide, and load the TiO 2 The substrate of the membrane is placed in waste water, irradiated with ultraviolet light at λ=253nm, 80W for a certain period of time and ...

Embodiment 2

[0021] The treatment method for removing organic matter in papermaking wastewater described in the embodiments of the present invention, the main steps are:

[0022] The composite coagulant is composed of aluminum chloride PAC, ferric sulfate PFS and cationic polyacrylamide CPAM. When mixing, the mixed coagulation is made according to the volume ratio of PAC:PFS:CPAM=6:4:2 With the continuous addition of the compound coagulant, the COD value in the filtrate will decrease rapidly and then rise slowly. When the amount of the compound coagulant is 1% of the volume of the treated wastewater, the removal rate of COD in the papermaking wastewater is high. Better degradation effect;

[0023] Then coagulate the treated wastewater, adjust the pH value of the wastewater between 3 and 6 with hydrochloric acid and sodium hydroxide, and load the TiO 2 The substrate of the membrane is placed in waste water, irradiated with ultraviolet light at λ=253nm, 90W for a certain period of time and ...

Embodiment 3

[0025] The treatment method for removing organic matter in papermaking wastewater described in the embodiments of the present invention, the main steps are:

[0026] The composite coagulant is composed of aluminum chloride PAC, ferric sulfate PFS and cationic polyacrylamide CPAM. When mixing, the mixed coagulation is made according to the volume ratio of PAC:PFS:CPAM=6:4:2 With the continuous addition of the compound coagulant, the COD value in the filtrate will decrease rapidly and then rise slowly. When the amount of the compound coagulant is 1% of the volume of the treated wastewater, the removal rate of COD in the papermaking wastewater is high. Better degradation effect;

[0027] Then coagulate the treated wastewater, adjust the pH value of the wastewater between 3 and 6 with hydrochloric acid and sodium hydroxide, and load the TiO 2 The substrate of the membrane is placed in waste water, irradiated with ultraviolet light at λ=253nm, 70W for a certain period of time and ...

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Abstract

The invention relates to a treatment method for removing organic matters in paper waste. The method comprises the following steps of: obtaining a liquid I by a sol-gel method; preparing a mixed liquid of redistilled water, glacial acetic acid and ethanol to obtain a liquid II; adding the liquid II into the liquid I to obtain a TiO2 liquid; selecting soda-lime glass as a TiO2 thin film carrier to obtain a nano TiO2 thin film; mixing aluminum chloride, ferric sulfate and cationic polyacrylamide by volume ratio of 6:4:2 to obtain a compound coagulant; and placing the loaded TiO2 thin film in waste water according to that the volume ratio of waste water to the compound coagulant is 100:1, and irradiating by ultraviolet light and continuously stirring and then standing. The method has the beneficial effects that the method has the advantages of mild reaction condition, less investment, low energy consumption and the like; catalytic oxidation reaction can be performed by ultraviolet irradiation or exposure to sunshine, so that no secondary pollution is available and organic matters are thoroughly oxidized to CO2 and H2O; and the application range is wide.

Description

technical field [0001] The invention relates to wastewater treatment technology, in particular to a treatment method for removing organic matter in papermaking wastewater. Background technique [0002] The waste water, waste gas, waste residue and toxic substances produced in the paper industry seriously pollute the environment, and the prevention or elimination of them will also affect the surrounding environment. In the paper industry, water pollution is the most serious, and the water consumption is large (generally more than 350 tons of water per ton of pulp and paper), and the content of organic matter in wastewater is high, and the biochemical oxygen demand (BOD) and chemical oxygen demand (COD) are high. There are many suspended solids (SS), which contain toxic substances, are colored and have peculiar smell, directly endanger the normal growth of aquatic organisms, and affect the development of residential water use and industrial, agricultural and animal husbandry; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/52C02F1/56C02F1/30C02F1/32C02F1/72C02F1/66C02F101/30C02F103/28
CPCY02W10/37
Inventor 姚玉松
Owner 姚玉松