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Method for treating food industrial wastewater by synergy of supercritical water oxidation and membrane separation

A supercritical water oxidation and co-processing technology, which is applied in food industry wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve problems such as not being able to meet drinking water needs, and achieve high production efficiency and treatment efficiency High, good processing effect

Active Publication Date: 2014-12-17
TIANJIN UNIV OF SCI & TECH +1
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Problems solved by technology

However, after supercritical water oxidation technology treats food industry wastewater, the resulting water still contains some ions and molecules, which cannot meet the needs of drinking water. Therefore, supercritical water oxidation technology and membrane separation technology are combined to jointly treat food industry wastewater. It can not only overcome the problems of membrane fouling and membrane pore clogging during the use of membrane separation technology, but also make the water quality of the final treatment meet the drinking water standard

Method used

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  • Method for treating food industrial wastewater by synergy of supercritical water oxidation and membrane separation

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Embodiment 1

[0026] A method for co-processing waste water discharged from Tianjin Goubuli Food Co., Ltd. by supercritical water oxidation and membrane separation, the steps are:

[0027] The waste water first passes through the grid well to remove large particles such as vegetable leaves and small pieces of meat, and then enters the regulating sedimentation filter. After coming out, it is pressurized to 34MPa by a high-pressure pump and input to the heat exchanger 7 for preheating. After the waste water is preheated to 280°C, it flows into the Supercritical water oxidation reactor; at the same time, the oxidant is pressurized from the storage tank 8 to 34MPa by the high-pressure pump 9 and input into the heat exchanger 10 for preheating, and the oxidant and waste water heated by the heater 11 at 340°C are respectively sent to the supercritical water oxidation reactor The two ends of 8 flow in to carry out the supercritical water oxidation reaction. The fluid after the reaction is exchange...

Embodiment 2

[0029] The method for supercritical water oxidation and membrane separation to jointly treat wastewater discharged from a biscuit processing plant, the steps are:

[0030] The waste water first passes through the grid well to remove large particles such as vegetable leaves and small pieces of meat, and then enters the regulating sedimentation filter. After coming out, it is pressurized to 32MPa by a high-pressure pump and input to the heat exchanger 7 for preheating. After the waste water is preheated to 250°C, it flows into the Supercritical water oxidation reactor; at the same time, the oxidant is pressurized from the storage tank 8 to 32MPa by the high-pressure pump 9 and input into the heat exchanger 10 for preheating, and the oxidant and waste water heated by the heater 11 at 320°C are respectively sent to the supercritical water oxidation reactor The two ends of 8 flow in to carry out the supercritical water oxidation reaction. The fluid after the reaction is exchanged h...

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Abstract

The invention relates to a method for treating food industrial wastewater by synergy of supercritical water oxidation and membrane separation, and belongs to the technical field of treatment of food industrial wastewater. The method comprises the steps of: firstly filtering food industrial wastewater, oxidizing and decomposing organic matters in wastewater by using the supercritical water oxidation technology, removing cations and anions in the water by using electroosmosis in the membrane technology, and at last putting into a reverse osmosis device to remove molecules dissolved in the water. Through optimization and control of key technological parameters such as temperature, pressure and the like, COD removal rate can reach 99.99%, quality of the treated water accords with drinking water standards, the water can be recycled for reuse, thus being saving in water resources and solving water pollution problems. According to the method, by-products generated by reaction can be all effectively recycled for use, treatment cost is low, production efficiency is high, automatic control of whole-course continuous treatment can be achieved, and a technical base is provided for treating the food industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of food industry wastewater treatment, in particular to a method for synergistically treating food industry wastewater by utilizing supercritical water oxidation and membrane separation. Background technique [0002] Food industry wastewater includes meat processing wastewater, beer wastewater, cereal processing wastewater and monosodium glutamate industrial wastewater, etc. The composition of food production wastewater is complex. In addition to containing a large amount of organic pollutants such as carbohydrates, proteins, fats and amino acids that are easily biodegradable, it also contains a large number of harmful microorganisms that endanger human health. It has suspended solids, high oil content, COD And BOD value is big, the range of water quality and water volume changes greatly, and the content of nitrogen and phosphorus compounds is high. If it is discharged directly without treatment, it will de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F103/32
Inventor 胡爱军焦淑停周忠凯郑捷樊艳熟彭焕芹储玉玲付水胜王德生
Owner TIANJIN UNIV OF SCI & TECH
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