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Process for treating bio-refractory waste water by up-flow multi-phase oxidation column

An oxidation tower, biochemically difficult technology, applied in the direction of oxidation water/sewage treatment, multi-stage water/sewage treatment, flotation water/sewage treatment, etc., can solve the problems of large amount of medicine, large amount of chemical sludge, high treatment cost, etc. Achieve the effect of cheap cost, simple operation and improved removal efficiency

Active Publication Date: 2009-09-02
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Ordinary use of Fenton's reagent to treat wastewater requires a large amount of drugs, and produces a large amount of chemical sludge, and the treatment cost is relatively high. Up to now, it has not been reported to overcome the problems existing in the treatment of wastewater by Fenton's reagent

Method used

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  • Process for treating bio-refractory waste water by up-flow multi-phase oxidation column
  • Process for treating bio-refractory waste water by up-flow multi-phase oxidation column

Examples

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Embodiment 1

[0037] The biochemical effluent from the middle section of a paper mill in Guangxi was treated by using an upflow heterogeneous oxidation tower to treat refractory biochemically degradable wastewater. The wastewater treatment volume is 250t / h, the COD value of the wastewater is 265mg / L, and the chromaticity is 64 times. The waste water is pumped into the water inlet tank at the top of the oxidation tower, and the water inlet tank is distributed to two circulation tanks, and H is added to the circulation tanks respectively. 2 o 2 and FeSO 4 ·7H 2 O. The amount of the two drugs added is: the mass ratio of hydrogen peroxide to COD in the water to be treated is 2:1, that is, H 2 o 2 Dosage 530mg / L; H 2 o 2 with Fe 2+ The molar ratio of FeSO is 5:1, that is, FeSO 4 ·7H 2 O dosage 867mg / L.

[0038]The waste water is reacted in the oxidation tower, and the reaction time is 30 minutes. After being treated by the oxidation tower, the wastewater enters the neutralization tan...

Embodiment 2

[0040] The leachate wastewater from a landfill in Guangxi was treated by using an upflow heterogeneous oxidation tower to treat refractory biodegradable wastewater. The wastewater treatment volume is 4t / h, the COD value of the wastewater is 565mg / L, and the chromaticity is 112 times. The waste water is pumped into the water inlet tank at the top of the oxidation tower, and the water inlet tank is distributed to two circulation tanks, and H is added to the circulation tanks respectively. 2 o 2 and FeSO 4 ·7H 2 O. The amount of the two drugs added is: the mass ratio of hydrogen peroxide to COD in the water to be treated is 2.6:1, that is, H 2 o 2 Dosage 1469mg / L; H 2 o 2 with Fe 2+ The molar ratio of FeSO is 13:1, that is, FeSO 4 ·7H 2 O dosage 924mg / L.

[0041] The waste water is reacted in the oxidation tower, and the reaction time is 40 minutes. After being treated by the oxidation tower, the wastewater enters the neutralization tank, and sodium hydroxide is added...

Embodiment 3

[0043] The biochemical effluent of a molasses alcohol factory in Guangxi was treated by using an upflow heterogeneous oxidation tower to treat refractory biochemically degradable wastewater. The wastewater treatment volume is 1t / h, the COD value of the wastewater is 347mg / L, and the chromaticity is 80 times. The waste water is pumped into the water inlet tank at the top of the oxidation tower, and the water inlet tank is distributed to two circulation tanks, and H is added to the circulation tanks respectively. 2 o 2 and FeSO 4 ·7H 2 O. The amount of the two drugs added is: the mass ratio of hydrogen peroxide to COD in the water to be treated is 3:1, that is, H 2 o 2 Dosage 1041mg / L; H 2 o 2 with Fe 2+ The molar ratio of FeSO is 20:1, that is, FeSO 4 ·7H 2 O dosage 426mg / L.

[0044] The waste water is reacted in the oxidation tower, and the reaction time is 60 minutes. After being treated by the oxidation tower, the wastewater enters the neutralization tank, and so...

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Abstract

The invention relates to a process for treating bio-refractory waste water by an up-flow multi-phase oxidation column. Fenton reagent and waste water to be treated are pumped into the up-flow multi-phase oxidation column for reacting 0.5-1h by a pump, wherein the molar ratio of H2O2 to Fe<2+> is 5-20:1 in the process of adding Fenton reagent, wherein the mass ratio of the added hydrogen peroxide and the COD in the waste water to be treated is 2-3:1. The waste water processed in the oxidation column enters a neutralization tank, a degassing tank and a coagulating precipitation tank in sequence, the pH value of the waste water is adjusted to be neutral in the neutralization tank, the waste water is blasted and degassed for 10-20 min in the degassing tank to degas small oxygen bubbles generated in the process of reacting, and is coagulated and precipitated by adding polyacrylamide in the coagulating precipitation tank to obtain supernatant fluid which reaches the discharge standard and is discharged. Experiments prove that the removal rates of the COD and the colority are both larger than 70 percent. The process has simple operation, easy obtaining of reactants, cheapness, no complex equipment, short treating time and high contamination removing rate.

Description

technical field [0001] The invention relates to a process method for treating industrial waste water, in particular to a process method for treating refractory biochemically degradable waste water in an upflow multiphase oxidation tower. Background technique [0002] For some toxic or biodegradable wastewater produced in the industrial production process, it is difficult to meet the discharge requirements only by conventional biochemical and physical chemical treatment. Therefore, further advanced treatment of biochemical effluent is required. Among many advanced treatment technologies, the use of Fenton's reagent to treat wastewater has the advantages of simple operation, easy availability of reactants, low cost, no complicated equipment, and environmental friendliness. It has been gradually applied to pulp and paper, dyes, preservatives, Phase agents, pesticides and other wastewater treatment projects. [0003] Fe was discovered by French scientist H.J.Fenton in 1894 2+ ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/72C02F1/66C02F1/24C02F1/52
Inventor 王双飞陈楠陈国宁陈永利宋海农覃程荣朱红祥周永信
Owner GUANGXI UNIV
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