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Deoiling treatment method for restaurant waste water

A technology for catering wastewater and oil treatment, which is applied in water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of difficult wastewater treatment and easy blockage of pipelines, and achieve clear water quality Transparent, reduce chemical oxygen consumption, improve the effect of floc structure

Inactive Publication Date: 2019-01-18
许昌涉步餐饮管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of detergent makes the oil in the oily wastewater of the catering industry emulsified. It is difficult for general oil-water treatment equipment to separate oil from water, and the emulsified oil must be demulsified. The blockage of the pipeline also caused the difficulty in the treatment of the wastewater. Therefore, we propose a degreasing treatment method for catering wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Firstly, waste water collection: filter the waste water generated by catering through the filter device, and pour the waste water into the waste water tank for treatment after the filtration is completed; then carry out oil-water separation: add polyferric sulfate, sodium humate and polyacrylamide to the waste water tank The mixed solution, wherein the addition amount of polyferric sulfate is 0.40mg / L, the addition amount of sodium humate is 0.36mg / L, the addition amount of polyacrylamide is 80mg / L, and the cationic polyferric sulfate is used to reduce the anion The surface activity of the neutral detergent destroys the hydration film of the emulsion oil beads and its electric double layer structure, so that the oil is separated out, and then the flocculant is used to separate the oil beads from the water. The fatty acid soap in the water is converted into a water-insoluble fatty acid, reducing the surface active substances in the water, increasing the demulsification ef...

Embodiment 2

[0022] Firstly, waste water collection: filter the waste water generated by catering through the filter device, and pour the waste water into the waste water tank for treatment after the filtration is completed; then carry out oil-water separation: add polyferric sulfate, sodium humate and polyacrylamide to the waste water tank The mixed solution, wherein the addition amount of polyferric sulfate is 0.30mg / L, the addition amount of sodium humate is 0.36mg / L, the addition amount of polyacrylamide is 60mg / L, using cationic polyferric sulfate to reduce anion The surface activity of the neutral detergent destroys the hydration film of the emulsion oil beads and its electric double layer structure, so that the oil is separated out, and then the flocculant is used to separate the oil beads from the water. The fatty acid soap in the water is converted into a water-insoluble fatty acid, reducing the surface active substances in the water, increasing the demulsification effect, and then...

Embodiment 3

[0024] Firstly, waste water collection: filter the waste water generated by catering through the filter device, and pour the waste water into the waste water tank for treatment after the filtration is completed; then carry out oil-water separation: add polyferric sulfate, sodium humate and polyacrylamide to the waste water tank The mixed solution, wherein the addition amount of polyferric sulfate is 0.40mg / L, the addition amount of sodium humate is 0.20mg / L, the addition amount of polyacrylamide is 80mg / L, using cationic polyferric sulfate to reduce anion The surface activity of the neutral detergent destroys the hydration film of the emulsion oil beads and its electric double layer structure, so that the oil is separated out, and then the flocculant is used to separate the oil beads from the water. The fatty acid soap in the water is converted into a water-insoluble fatty acid, reducing the surface active substances in the water, increasing the demulsification effect, and then...

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Abstract

The invention discloses a deoiling treatment method for restaurant waste water. The method comprises the following steps: (1) waste water collection: filtering the restaurant waste water through a filter device, and pouring the filtered waste water into a waste water box to be treated; and (2) oil-water separation: adding a mixed liquid of polymeric ferric sulfate, sodium humate and polyacrylamideinto the waste water box, reducing the surface activity of an anionic detergent by means of the catholic polymeric ferric sulfate, and destroying hydration shells of emulsified oil beads and double electric layer structures thereof, wherein oil is separated out. The oil content of purified water is 4.5 mg / L, the chemical oxygen consumption is 61.5 mg / L, the settling time is 2 minutes, the effluent is clear and transparent, the demulsification efficiency reaches 95%, and the clear liquid residual amount is lower than national state, and meanwhile, the chemical oxygen consumption is reduced toa great extent, so that the problem that the waste water treatment difficulty is great as a pipeline is easily blocked because existing oil-water treatment equipment is hard to separate oil from wateris solved.

Description

technical field [0001] The invention relates to the technical field of catering, in particular to a method for degreasing and treating catering wastewater. Background technique [0002] In recent years, with the growth of the national economy and the rapid development of the catering industry, the amount of wastewater discharged is increasing. Because the wastewater contains high concentrations of animal and vegetable oils and a large amount of suspended solids, it has become an important source of water pollution. , the treatment of oily wastewater in the catering industry can not only protect the ecological environment, but also reduce the burden on urban sewage treatment stations, which has obvious environmental and economic benefits. The oily wastewater in the catering industry has a high amount of pollution, and the main pollutants are animal and vegetable oils, chemical oxygen consumption and suspended solids. At present, in the catering industry, the application of de...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/001C02F1/40C02F1/5236C02F1/56C02F2001/007
Inventor 李跃军田小龙
Owner 许昌涉步餐饮管理有限公司
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