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A kind of treatment method of garlic processing wastewater

A technology of garlic processing wastewater and treatment method, which is applied in the directions of food industry wastewater treatment, energy wastewater treatment, water/sewage treatment, etc. Treatment cost and effect of preventing sludge loss

Active Publication Date: 2022-06-07
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With my country's targeted poverty alleviation for rural industries and strong support for the deep processing industry of agricultural products, the garlic processing industry has developed rapidly. It is non-toxic, but has a high content of organic matter. If it is discharged directly without treatment, it will cause serious deterioration of water quality and have a bad impact on the surrounding environment.
In addition to the high content of organic matter, the wastewater also contains a kind of natural garlic oil, its main components are allicin and allicin, which have strong biological activity and strong lethality to bacteria, which will cause damage to the biochemical treatment process. Severe interference, it is difficult to meet the standard by using traditional biological treatment process
[0003] At present, the treatment processes for garlic processing wastewater mainly include "micro-electrolysis-contact oxidation method", "air flotation-mixed flow biological selection process-enhanced SBR process", "hydrolytic acidification-multi-stage contact oxidation" and "anaerobic baffles". Reactor-biological aerated filter combined process" and so on. Although these processes can meet the discharge standards required by the state when treating garlic wastewater, they are not available due to high investment costs, cumbersome operations, and unstable treatment effects. It is used by most small and medium-sized garlic processing enterprises, resulting in a large amount of waste water being discharged directly without treatment, which has caused a serious burden on the rural environment, and many garlic processing factories have been shut down due to environmental pollution problems
[0004] In view of the above situation, in order to solve the defects of the prior art, the present invention provides a method with small investment, resource recovery, high automation and low processing cost, which can effectively solve the problem of small and medium-sized garlic processing enterprises on the premise that the waste water treatment reaches the standard. The problem of being forced to shut down due to economic and environmental protection

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  • A kind of treatment method of garlic processing wastewater
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  • A kind of treatment method of garlic processing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The process of treating wastewater from garlic processing in a factory is as follows:

[0030] (1) Add sodium hydroxide in the adjustment tank to adjust the pH value of garlic processing wastewater to 7-8 and then send it to a flocculation sedimentation tank with a flocculant added for treatment. The flocculant is polyaluminum chloride and polyacrylamide. The dosage ratio is 1:2.5, the dosage of flocculant per 1L of wastewater is 0.05mg, and the obtained flocculation sediment is sent to the sludge thickening tank;

[0031] (2) in the waste water after above-mentioned steps (1) processing, add compound extractant and carry out the recovery of allicin, the consumption of compound extractant is 50ml / L, and described compound extractant is made of tributyl phosphate, trioctyldecane It is composed of base tertiary amine and diluent n-octanol, and the weight ratio of tributyl phosphate and trioctyldecyl tertiary amine is 1:1. Taking the mixture of tributyl phosphate and trioc...

Embodiment 2

[0037] The process of treating wastewater from garlic processing in a factory is as follows:

[0038] (1) Add sodium hydroxide in the adjustment tank to adjust the pH value of the garlic processing wastewater to 8 and then send it to the flocculation sedimentation tank added with flocculants for treatment. The flocculants are polyaluminum chloride and polyacrylamide, and the proportion of the two 1:5, the amount of flocculant per 1L of wastewater is 20mg, and the obtained flocculation sediment is sent to the sludge thickening tank;

[0039] (2) in the waste water after above-mentioned steps (1) is processed, add compound extractant and carry out the recovery of allicin, the consumption of compound extractant is 50ml / L, and compound extractant is composed of tributyl phosphate, trioctyldecyl tertiary It is composed of amine and diluent chloroform, the weight ratio of tributyl phosphate and trioctyldecyl tertiary amine is 1:3, taking the mixture of tributyl phosphate and triocty...

Embodiment 3

[0045] The process of treating wastewater from garlic processing in a factory is as follows:

[0046] (1) Add sodium hydroxide in the adjustment tank to adjust the pH value of the garlic processing wastewater to 8 and then send it to the flocculation sedimentation tank added with flocculants for treatment. The flocculants are polyaluminum chloride and polyacrylamide, and the proportion of the two is 1:10, the dosage of flocculant per 1L of wastewater is 30mg, and the obtained flocculation sediment is sent to the sludge thickening tank;

[0047] (2) in the waste water after above-mentioned steps (1) is processed, add compound extractant and carry out the recovery of allicin, the consumption of compound extractant is 50ml / L, and compound extractant is composed of tributyl phosphate, trioctyldecyl tertiary Amine and diluent carbon tetrachloride, the weight ratio of tributyl phosphate and trioctyldecyl tertiary amine is 1:5, taking the mixture of tributyl phosphate and trioctyldec...

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Abstract

The invention discloses a method for treating garlic processing wastewater, which comprises the following steps: (1) adjusting the pH value of garlic processing wastewater and performing flocculation treatment; (2) adding a composite extractant to recover allicin; (3) dissolving the wastewater Adjust the pH to 3-4 for photocatalytic Fenton oxidation; (4) adjust the pH of the wastewater to 7-8 and then enter the sedimentation tank for precipitation; (5) the wastewater after precipitation enters the ABR anaerobic baffle reactor for treatment, and the reactor (6) The wastewater treated by the ABR anaerobic baffle reactor enters the ozone reactor, and the organic matter in the wastewater is degraded under the action of ozone and red mud ceramsite, which is completed. The invention provides a treatment method for garlic processing wastewater, which combines flocculation precipitation, allicin recovery, photocatalytic Fenton oxidation, anaerobic treatment and ozone oxidation, so that garlic wastewater can reach the "Comprehensive Wastewater Discharge Standard" (GB8978-1996) The first-level standard is suitable for most small and medium-sized garlic processing wastewater enterprises.

Description

technical field [0001] The invention relates to the field of agricultural product wastewater treatment, in particular to a treatment method for garlic processing wastewater. Background technique [0002] China, as the world's largest garlic producer, consumer and exporter, the stable, healthy and orderly development of the garlic industry is of great significance to the rapid growth of my country's agricultural economy and the continuous increase of farmers' income. With my country's targeted poverty alleviation in rural industries and strong support for the deep processing industry of agricultural products, the garlic processing industry has developed rapidly. A large number of small and medium-sized garlic processing industries have been established in rural areas. During the processing of garlic, a large amount of wastewater will be generated. Although the wastewater itself It is not toxic, but has a high organic content. If it is directly discharged without treatment, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/32C02F101/30
CPCC02F9/00C02F1/66C02F1/52C02F1/26C02F1/30C02F1/722C02F1/725C02F3/284C02F1/78C02F2101/30C02F2103/32Y02W10/37
Inventor 崔节虎朱杰王泽华王香平李春光孙玉李发祥李月涵王田园郑宾国
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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