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Method for treating high-fat wastewater of food industries

A processing method and high-fat technology, applied in the chemical industry, to achieve the effect of remarkable processing effect, simple operation and saving floor space

Inactive Publication Date: 2017-01-04
潘纪鸿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The existing industrial wastewater treatment methods and systems in the food industry cannot economically and effectively treat large quantities of sewage discharged from the chemical industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A treatment method for food industry high-fat waste water, it comprises the following steps:

[0046] A. Primary filtration and anaerobic treatment

[0047] First, the high-fat wastewater from the food industry flows through multiple grids, and then pumped into the baffled hydrolysis reactor for reaction to remove slick oil and decompose organic acids into methane and carbon dioxide, and then discharged into the anaerobic aeration tank for anaerobic treatment to further remove the COD in the wastewater, that is, to obtain the anaerobic treated wastewater;

[0048] B. Coagulation and air flotation separation

[0049]The waste water after the anaerobic treatment described in the step A is discharged into the coagulation tank, and the lime of 10ppm is added earlier under stirring condition, then add 10ppm coagulant (polyaluminum chloride) and carry out coagulation treatment 20min, then pass Continue to add soda ash to adjust the pH to 7.5, then carry out solid-liquid sep...

Embodiment 2

[0055] A treatment method for food industry high-fat waste water, it comprises the following steps:

[0056] A. Primary filtration and anaerobic treatment

[0057] First, the high-fat wastewater from the food industry flows through multiple grids, and then pumped into the baffled hydrolysis reactor for reaction to remove slick oil and decompose organic acids into methane and carbon dioxide, and then discharged into the anaerobic aeration tank for anaerobic treatment to further remove the COD in the wastewater, that is, to obtain the anaerobic treated wastewater;

[0058] B. Coagulation and air flotation separation

[0059] The waste water after the anaerobic treatment described in the steps A is discharged into the coagulation tank, and the lime of 45ppm is added earlier under stirring condition, then adds 40ppm coagulant (polyaluminum chloride) and carry out coagulation treatment 50min, then pass Continue to add soda ash to adjust the pH to 8.0, then carry out solid-liquid ...

Embodiment 3

[0065] A treatment method for food industry high-fat waste water, it comprises the following steps:

[0066] A. Primary filtration and anaerobic treatment

[0067] First, the high-fat wastewater from the food industry flows through multiple grids, and then pumped into the baffled hydrolysis reactor for reaction to remove slick oil and decompose organic acids into methane and carbon dioxide, and then discharged into the anaerobic aeration tank for anaerobic treatment to further remove the COD in the wastewater, that is, to obtain the anaerobic treated wastewater;

[0068] B. Coagulation and air flotation separation

[0069] The waste water after the anaerobic treatment described in the steps A is discharged into the coagulation tank, and the lime of adding 80ppm is added earlier under stirring condition, then adds 70ppm coagulant (polyaluminum chloride) and carry out coagulation treatment 80min, then pass Continue to add soda ash to adjust the pH to 8.5, then carry out solid-...

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Abstract

The invention relates to a method for treating high-fat wastewater of food industries. The method comprises the following steps: (A) after wastewater flows through multiple grids, pumping the wastewater into a bending-flow type hydrolysis reactor for treating, introducing the wastewater into an anaerobic aeration tank, and carrying out anaerobic treatment; (B) introducing the wastewater into a coagulating tank for coagulation, regulating the pH to 7.5-8.5, firstly carrying out solid-liquid separation, and carrying out floating separation; (C) carrying out oxidation treatment on the wastewater by virtue of ultrasonic compound supercritical water, filtering by virtue of activated carbon, and carrying out sedimentation; and (D) sequentially carrying out security filtering, micro-filtration membrane filtering, ultrafiltration membrane filtering and reverse osmosis membrane filtering, so as to obtain discharged water meeting the environmental protection standards. Compared with the prior art, the method has the advantages that the organic matters in the high-fat wastewater of the food industries can be effectively degraded, the acidity of the wastewater is reduced, suspended solids such as COD and grease, metal oxides, colloids, bacteria and the like can be effectively removed, the wastewater can be economic, efficient and bulk treatment of the wastewater can be realized, the operation is simple, the operation cost is low, the occupied area is reduced, and the treating effect is remarkable.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for treating industrial wastewater. Background technique [0002] In recent years, with the rapid development of my country's industry, some chemical, pharmaceutical, papermaking, food, fermentation and other industries have discharged a large amount of high-soluble sulfate organic wastewater into natural ecological water bodies. Excessive sulfate in the water body can not only make the water body smelly and deteriorate the water quality, but also strongly restrict the growth of aquatic organisms and plants, and cause the salinization of the surrounding soil. In short, the pollution of the water body and soil caused by it is becoming increasingly serious and serious. aroused widespread concern. [0003] Industrial wastewater refers to the wastewater, sewage and waste liquid produced in the process of industrial production, which contains industrial production materials,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/24C02F1/44C02F1/52C02F3/28C02F1/02
CPCC02F1/001C02F1/02C02F1/24C02F1/283C02F1/36C02F1/441C02F1/444C02F1/52C02F1/5245C02F1/66C02F1/72C02F3/28C02F9/00C02F2103/32C02F2301/08Y02E50/30
Inventor 潘纪鸿
Owner 潘纪鸿
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