Method for treating waste water from food industry

A technology of industrial wastewater and treatment method, which is applied in the chemical industry to achieve the effects of remarkable treatment effect, large-scale treatment and simple operation.

Inactive Publication Date: 2017-01-25
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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  • Method for treating waste water from food industry
  • Method for treating waste water from food industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of processing method of food industry waste water, it comprises the following steps:

[0046] A. Primary filtration and sedimentation

[0047] First, the waste water from the food industry flows through multiple grids with gradually reduced grid gaps, and then it is discharged into the sedimentation tank, and 10ppm of flocculant (ferrous chloride) is added for flocculation, and air is blown in for 10 minutes, and then the sedimentation treatment is carried out for 10 minutes. Promptly obtain the supernatant of industrial wastewater;

[0048] B. Ultraviolet sterilization and pH adjustment

[0049] Discharge the supernatant of industrial waste water described in step A into the acid-base adjustment tank, first sterilize with ultraviolet light, remove peculiar smell, then adjust its pH to 5.5 with alkali (sodium hydroxide), and obtain the adjusted pH value post-industrial wastewater;

[0050] C. Bacterial decomposition and activated carbon filtration

[0051]The...

Embodiment 2

[0055] A kind of processing method of food industry waste water, it comprises the following steps:

[0056] A. Primary filtration and sedimentation

[0057] First, the food industry wastewater flows through multiple grids with gradually reduced grid gaps, and then is discharged into the sedimentation tank, 35ppm flocculant (ferrous chloride) is added for flocculation, and air is blown in for 15 minutes, and then sedimentation treatment is carried out for 25 minutes. Promptly obtain the supernatant of industrial wastewater;

[0058] B. Ultraviolet sterilization and pH adjustment

[0059] Discharge the supernatant of the industrial waste water described in step A into the acid-base adjustment pool, first sterilize with ultraviolet light, remove peculiar smell, and then adjust its pH to 6.5 with alkali (sodium hydroxide), to obtain the adjusted pH value post-industrial wastewater;

[0060] C. Bacterial decomposition and activated carbon filtration

[0061] The industrial wast...

Embodiment 3

[0065] A kind of processing method of food industry waste water, it comprises the following steps:

[0066] A. Primary filtration and sedimentation

[0067] Firstly, the waste water from the food industry flows through multiple grids with gradually reduced grid gaps, and then discharged into the sedimentation tank, adding 60ppm flocculant (ferrous chloride) for flocculation, blowing in air for 20 minutes, and then performing sedimentation treatment for 40 minutes. Promptly obtain the supernatant of industrial wastewater;

[0068] B. Ultraviolet sterilization and pH adjustment

[0069] Discharge the supernatant of the industrial waste water described in step A into the acid-base adjustment pool, first sterilize it with ultraviolet rays, remove the peculiar smell, and then adjust its pH to 7.5 with alkali (sodium hydroxide), to obtain the adjusted pH value post-industrial wastewater;

[0070] C. Bacterial decomposition and activated carbon filtration

[0071] The industrial ...

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Abstract

The invention relates to a method for treating waste water from the food industry, which includes the steps of: A. Waste water flows through aplurality of grilles and is flocculated and added with air via blowing, and then is settled; B. First waste water is sterilized with ultraviolet, whose pH is adjusted to 5.5-7.5 with base; C. Waste water flows into an anaerobic aeration tank and an aerobic tank, and next is treated by the oxygen film bioreactor, and then is filtered by an activated carbon filter and by a ultrafiltration membrane filter, finally is settled; D. Waste water is filtered firstly by a cartridge filter, and then by a microfiltration membrane filtration process, filtering by a ultrafiltration membrane filter, and finally by a reverse osmosis membrane filter, to obtain the discharge water in accordance with the environmental standard. Compared with the prior art, the method for treating waste water from the food industry is a simple, convenient and fast method for neutralizing waste water from the food industry, as well as a method for removing suspended solids, metal oxides, colloids, organic matters, nitrogen source materials and bacteria, etc., which not only can be used for economically, efficiently treating a large amount of waste water, with simple operation procedures, low operating costs, and smaller covering area, but also have remarkable treatment effects.

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): C02F9/14C02F103/32
CPCC02F9/00C02F1/001C02F1/32C02F1/441C02F1/444C02F1/5236C02F1/66C02F1/70C02F3/30C02F2001/007C02F2103/32C02F2301/08C02F2303/02C02F2303/04
Inventor 潘纪鸿
Owner 潘纪鸿
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