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Zero-discharge treatment process for pickle wastewater

A treatment process and zero discharge technology, which is applied in the field of pickle wastewater zero discharge treatment process, can solve problems such as inability to desalinate, achieve the effects of reducing investment and operating costs, facilitating recycling, and good water quality

Inactive Publication Date: 2019-12-20
四川恒泰环境技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a zero-discharge treatment process for kimchi wastewater, which can effectively solve the problem that when the existing method is used to treat kimchi wastewater, the biochemical treatment can completely treat pollutants such as COD, ammonia nitrogen, and phosphorus to meet the standards. But the problem of not being able to remove the salt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A zero-discharge treatment process for kimchi wastewater, comprising the following steps:

[0026] (1) Cleaning wastewater grid adjustment: The cleaning wastewater is treated with grids to remove a large amount of suspended solids in the kimchi wastewater, and then enters the adjustment tank for water quality and water volume adjustment; at the same time, the condensate and mother liquor produced by the subsequent MVR system enter the adjustment tank, biochemical treatment.

[0027] (2) Anaerobic: The wastewater from the regulating tank enters the anaerobic tank, where most of the COD is removed by anaerobic bacteria, and at the same time, the macromolecular COD is degraded into small molecular COD, which is beneficial to the subsequent biochemical treatment.

[0028] (3) AO aerobic pool: use aerobic bacteria, digestive bacteria and denitrifying bacteria to remove COD and ammonia nitrogen in the aerobic pool;

[0029] (4) MBR membrane tank: MBR ultrafiltration membrane...

Embodiment 2

[0037] A zero-discharge treatment process for kimchi wastewater, comprising the following steps:

[0038] (1) Cleaning wastewater grid adjustment: The cleaning wastewater is treated with grids to remove a large amount of suspended solids in the kimchi wastewater, and then enters the adjustment tank for water quality and water volume adjustment; at the same time, the condensate and mother liquor produced by the subsequent MVR system enter the adjustment tank, biochemical treatment.

[0039] (2) Anaerobic: The wastewater from the regulating tank enters the anaerobic tank, where most of the COD is removed by anaerobic bacteria, and at the same time, the macromolecular COD is degraded into small molecular COD, which is beneficial to the subsequent biochemical treatment.

[0040] (3) AO aerobic pool: use aerobic bacteria, digestive bacteria and denitrifying bacteria to remove COD and ammonia nitrogen in the aerobic pool;

[0041] (4) MBR membrane tank: MBR ultrafiltration membrane...

Embodiment 3

[0049] A zero-discharge treatment process for kimchi wastewater, comprising the following steps:

[0050] (1) Cleaning wastewater grid adjustment: The cleaning wastewater is treated with grids to remove a large amount of suspended solids in the kimchi wastewater, and then enters the adjustment tank for water quality and water volume adjustment; at the same time, the condensate and mother liquor produced by the subsequent MVR system enter the adjustment tank, biochemical treatment.

[0051] (2) Anaerobic: The wastewater from the regulating tank enters the anaerobic tank, where most of the COD is removed by anaerobic bacteria, and at the same time, the macromolecular COD is degraded into small molecular COD, which is beneficial to the subsequent biochemical treatment.

[0052] (3) AO aerobic pool: use aerobic bacteria, digestive bacteria and denitrifying bacteria to remove COD and ammonia nitrogen in the aerobic pool;

[0053] (4) MBR membrane tank: MBR ultrafiltration membrane...

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Abstract

The invention discloses a zero-discharge treatment process for pickle wastewater. The process comprises the following steps: (1) adjusting water quality and quantity of pickle cleaning wastewater, andthen performing anaerobic and aerobic treatment in sequence; (2) concentrating and filtering the solution after step (1) treatment by using an MBR membrane and an RO membrane in sequence, and performing separation to obtain a concentrated salt solution and recovered use water; (3) mixing the concentrated salt solution with pretreated saline wastewater, and performing MVR evaporation and crystallization treatment; and (4) discharging a condensate and a mother liquor into a cleaning wastewater adjusting tank, and repeating the steps (1)-(3). In the process, the saline pickle wastewater and thepickle cleaning wastewater are separately pretreated and then subjected to comprehensive biochemical treatment, a dilution water amount is not increased, and the investment is saved. The saline concentrated water is first pre-treated, and then enters MVR for desalination, the condensate enters a biochemical system, and the problem that the biochemical system cannot be operated due to high salt content is solved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a zero-discharge treatment process for pickle wastewater. Background technique [0002] Kimchi wastewater mainly comes from the wastewater generated during the cleaning, desalination and salting processes in the process of pickling pickles. The main pollutants in wastewater are COD and BOD 5 , Suspended solids, ammonia nitrogen, total nitrogen, total phosphorus, sodium chloride, COD has good biodegradability and belongs to easily degradable COD. Among them, the concentration of COD (8000mg / L) and salt content (5000mg / L) in the cleaning wastewater is low, but the water volume is large, and biochemical treatment is generally used. However, saline wastewater has high COD (30000mg / L) and salt content (40000mg / L) concentrations, low output, intermittent discharge, and difficult biochemical treatment. Generally, it is diluted and mixed with cleaning wastewate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/32
CPCC02F1/048C02F1/44C02F1/441C02F1/66C02F3/30C02F3/302C02F9/00C02F2103/32C02F2301/08
Inventor 杨红梅肖德龙黄莉杨汉军刘泉蒲柳李江姚铭唐俊黄文凤刘世林张亚明杜洪飞郑庆生
Owner 四川恒泰环境技术有限责任公司
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