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A kind of treatment method of garlic processing wastewater

A garlic processing wastewater and treatment method technology, applied in food industry wastewater treatment, water/sewage multi-stage treatment, extraction water/sewage treatment, etc., can solve problems such as complex operation, waste of resources, environmental pollution, etc., and achieve simple operation, Easy-to-obtain effects of equipment and instruments

Active Publication Date: 2020-06-09
南京瑞轩环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the garlic processing wastewater is directly discharged, on the one hand, it will cause waste of resources containing allicin, garlic polysaccharides and other useful substances; on the other hand, the garlic processing wastewater is high-concentration wastewater with very high COD The strong antibacterial effect will destroy the normal metabolism of microorganisms, cause a large number of deaths of fish, shrimp and water microorganisms, and cause serious environmental pollution
However, if it is not treated in time, it contains a strong pungent smell and acrid taste, and it will produce a strong stench if it is left for a long time, which will have a huge impact on the factory area and nearby residents.
[0003] Those skilled in the art have been researching and developing a garlic wastewater treatment method that can solve the above problems. Chinese patent application CN105293815A discloses a treatment method for high-concentration garlic processing sewage. Electrolysis, primary precipitation, pre-acidification, A 2 The steps of / O, secondary sedimentation, V-type filter, and ultraviolet disinfection can effectively degrade allicin and other bactericidal and bacteriostatic substances contained in garlic processing sewage, reduce the killing effect on biochemical bacteria, and quickly treat COD concentration More than 5,000 garlic processing sewage, and meet the discharge requirements, but through micro-electrolysis, A 2 / O and other methods destroy and remove active ingredients such as allicin in sewage, resulting in a waste of resources
Chinese patent application CN109607851A discloses a garlic wastewater treatment process. The process performs microfiltration, nanofiltration, reverse osmosis, flocculation, and pressure filtration on garlic wastewater, and can recycle active ingredients such as allicin and garlic polysaccharides, and has low cost. , high recovery rate, but in practice, it is found that in microfiltration, reverse osmosis and other operations, the filter membrane has a small pore size, and it is necessary to apply a certain pressure to assist, and the operation is complicated

Method used

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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
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 A treatment method for garlic processing wastewater

[0029] Include the following steps:

[0030] S1. The garlic processing wastewater passes through the fine grid and the grit chamber to remove larger suspended solids and particles in the wastewater to obtain wastewater A;

[0031] S2. Add corn oil to the waste water A obtained in step S1, the volume ratio of corn oil and waste water A is 1:5, after stirring and fully mixing, leave to separate and separate to obtain oil phase X and waste water B;

[0032] S3, in step S2 gained waste water B, add its weight percentage 0.05% sodium lauroyl glutamate, pass into air to form foam by the air pump of bottom air compressor, the flow rate of passing into air is 450ml / min, and the time is 45min, Separate and obtain foam Y and waste water C;

[0033] S4. Heat the waste water C obtained in step S3 to 75° C., keep it warm for 60 minutes, and after cooling down to room temperature, use the anaerobic-biological contact ...

Embodiment 2

[0035] Example 2 A treatment method for garlic processing wastewater

[0036] Include the following steps:

[0037] S1. The garlic processing wastewater passes through the fine grid and the grit chamber to remove larger suspended solids and particles in the wastewater to obtain wastewater A;

[0038] S2, adding soybean oil to the waste water A obtained in step S1, the volume ratio of soybean oil and waste water A is 1:3, after stirring and fully mixing, leave to separate and separate to obtain oil phase X and waste water B;

[0039] S3, in step S2 gained waste water B, add the N-lauroyl aspartic acid of its weight percent 0.1%, pass into air to form foam by the air pump of bottom air compressor, the flow rate of passing into air is 400ml / min, and the time is 60min, separate and obtain foam Y and waste water C;

[0040] S4. Heat the waste water C obtained in step S3 to 80° C., keep it warm for 45 minutes, and after cooling down to room temperature, use the anaerobic-biologi...

Embodiment 3

[0042] Example 3 A treatment method for garlic processing wastewater

[0043] Include the following steps:

[0044] S1. The garlic processing wastewater passes through the fine grid and the grit chamber to remove larger suspended solids and particles in the wastewater to obtain wastewater A;

[0045] S2, adding rapeseed oil to the waste water A obtained in step S1, the volume ratio of the rapeseed oil and waste water A is 1:8, after stirring and fully mixing, stand and separate to obtain oil phase X and waste water B;

[0046] S3, in step S2 gained waste water B, add its weight percentage 1% sodium cocoyl methyl taurate, pass into air to form foam by the air pump of bottom air compressor, the flow velocity of passing into air is 300ml / min, time Be 60min, separate and obtain foam Y and waste water C;

[0047] S4. Heat the waste water C obtained in step S3 to 60° C., keep it warm for 60 minutes, and after cooling down to room temperature, use the anaerobic-biological contact o...

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PUM

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Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a treatment method of garlic processing wastewater. The method mainly includes removal of suspended solids and particles, extraction of vegetable oil, foam separation, aerobic-biological contact oxidation treatment and the like. On one hand, allicin, garlic polysaccharide and protein and other effective components can be separated from garlic processing wastewater, and resources can be fully utilized; on the other hand, the bacteriostatic, smelly and eutrophic materials are removed from wastewater, the aerobic-biological contact oxidation treatment can be smoothly adopted, COD, BOD5 and SS of wastewater are significantly reduced, and finally discharged wastewater completely meets the primary sewage discharge standard of the national standard GB18918-2002.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment method for garlic processing wastewater. Background technique [0002] my country is the largest garlic producer in the world. Not only does the production and export volume of fresh garlic rank first in the world, but the garlic processing industry is also booming. There are two main types of processed products: garlic flakes and garlic oil. Among them, the annual processing volume of dehydrated garlic flakes in my country is about 300,000 tons, and each ton of dehydrated garlic flakes needs to consume 30-40 tons of water. It can be seen that garlic production and processing enterprises will generate a large amount of waste water every year and need to be discharged. If the garlic processing wastewater is directly discharged, on the one hand, it will cause waste of resources containing allicin, garlic polysaccharides and other useful substanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/32
CPCC02F1/001C02F1/24C02F1/26C02F3/30C02F9/00C02F2001/007C02F2103/32
Inventor 韩新民徐泽林黄超段会英於俊颖
Owner 南京瑞轩环保科技有限公司