Treatment method for high fat food processing wastewater

A food processing wastewater and treatment method technology, which is applied in the field of high-fat wastewater treatment and high-fat food processing wastewater treatment, can solve the problems of high operating costs, complex structure of the treatment system, and substandard wastewater discharge, so as to reduce load and ensure air quality. Quality, odor reduction effect

Inactive Publication Date: 2014-01-22
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide an anaerobic technology based on ABR in view of defects such as long design process flow, overly complex structure of the treatment system, high operating costs, and substandard discharged wastewater after treatment in the treatmen

Method used

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  • Treatment method for high fat food processing wastewater
  • Treatment method for high fat food processing wastewater
  • Treatment method for high fat food processing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 10 tons / day High fat food processing wastewater treatment method.

[0049] The water quality indicators of the above-mentioned high-fat food processing wastewater have been determined and are shown in Table 2.

[0050] Table 2 Water quality indicators of high-fat food processing wastewater

[0051] serial number project unit measured value serial number project unit measured value 1 COD Cr mg / L 1800 5 Total Phosphorus mg / L 8 2 BOD 5 mg / L 800 6 total nitrogen mg / L 60 3 SS mg / L 400 7 oil mg / L 120 4 Ammonia nitrogen mg / L 60

[0052] (1) Slag removal

[0053]The high-fat food processing wastewater is collected by the pipeline and enters the coarse grid 1 and the fine grid 2. The coarse floating matter in the wastewater is firstly removed through the coarse grid 1, and then most of the insoluble substances in the water are further removed through the fine grid 2. ...

Embodiment 2

[0074] 40 tons / day high fat food processing wastewater treatment method.

[0075] The water quality indicators of the above-mentioned high-fat food processing wastewater have been determined and are shown in Table 4.

[0076] Table 4 Water quality indicators of high-fat food processing wastewater

[0077] serial number project unit measured value serial number project unit measured value 1 COD Cr mg / L 2000 5 Total Phosphorus mg / L 10 2 BOD 5 mg / L 1200 6 total nitrogen mg / L 80 3 SS mg / L 500 7 oil mg / L 150 4 Ammonia nitrogen mg / L 80

[0078] (1) Slag removal

[0079] The high-fat food processing wastewater is collected by the pipeline and enters the coarse grid 1 and the fine grid 2. The coarse floating matter in the wastewater is firstly removed through the coarse grid 1, and then most of the insoluble substances in the water are further removed through the fine grid ...

Embodiment 3

[0100] 12,000 tons / day of a milk and peanut series food processing wastewater treatment project.

[0101] The water quality indicators of the above-mentioned certain milk and peanut series food processing wastewater have been determined and are shown in Table 6.

[0102] Table 6 Water quality indicators of a milk and peanut series food processing wastewater

[0103] serial number project unit measured value serial number project unit measured value 1 COD Cr mg / L 1200 5 Total Phosphorus mg / L 5 2 BOD 5 mg / L 600 6 total nitrogen mg / L 50 3 SS mg / L 300 7 oil mg / L 100 4 Ammonia nitrogen mg / L 40

[0104] (1) Slag removal

[0105] The high-fat food processing wastewater is collected by the pipeline and enters the coarse grid 1 and the fine grid 2. The coarse floating matter in the wastewater is firstly removed through the coarse grid 1, and then most of the insoluble substa...

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Abstract

The invention relates to a treatment method for high fat food processing wastewater. According to the method, wastewater is treated by the following processes in order to obtain up-to-standard discharge water, and the treatment processes include: deslagging, ABR anaerobic treatment, air flotation, biological aerated filter biochemical treatment (called BAF biochemical treatment for short), coagulation, filtration, disinfection, sludge treatment and gas treatment. Directed at the water quality characteristic of high fat concentration in food processing wastewater, the method firstly removes animal and plant floating oil through the configuration of multiple grids in an ABR reactor, then lime and PAC are added to make animal and plant oil and other organic pollutants in wastewater form flocs, the phosphate group in the wastewater reacts with calcium ions and aluminum ions to generate phosphate precipitates which are then removed, and then a large number of fine bubbles are produced by an air floatation tank so as to prompt residual fat to adhere to impurity floc particles, thus forming flocs that have specific gravity smaller than water and float to the water surface. Therefore, most animal and plant fat and other organic pollutants can be removed. Not only are the oil indexes up to standards, but also the load of subsequent BAF biochemical treatment is reduced.

Description

technical field [0001] The invention relates to a treatment method for high-fat wastewater, in particular to a treatment method for high-fat food processing wastewater based on ABR anaerobic technology, air flotation technology and BAF technology, and belongs to the field of water pollution control of environmental engineering. Background technique [0002] The food industry has a wide range of raw materials, a wide variety of products, and a large amount of water is used in the processing process, so a lot of waste is discharged in the form of sewage. The quantity and quality of discharged wastewater vary widely. The main pollutants in wastewater are: (1) solid substances floating in wastewater, such as vegetable leaves, fruit peels, minced meat, poultry feathers, etc.; (2) substances suspended in wastewater are oil, protein, starch, colloidal substances, etc.; (3) Acids, alkalis, salts, sugars, etc. dissolved in wastewater, especially high content of phosphorus compounds ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/32
Inventor 杨幼军陈忠郭春勇李丹张怿昕
Owner BOYING XIAMEN SCI & TECH
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