language
中国
韩国
韩国
韩国
韩国
韩国
EXHIBITION
ENOCHLOR

Homepage / News Details

All categories

Wastewater treatment of calcium hypochlorite bleached pulp

  • Categroy:News
  • Author:
  • Origin:
  • Release Time:2020-04-17 13:43
  • Views:

【Summary】Wastewater treatment of calcium hypochlorite bleached pulp

Wastewater treatment of calcium hypochlorite bleached pulp

【Summary】Wastewater treatment of calcium hypochlorite bleached pulp

  • Categroy:News
  • Author:
  • Origin:
  • Release Time:2020-04-17 13:43
  • Views:
Information

1. The ultrafiltration method is not easy to be decomposed by microorganisms because of the high molecular weight part of the bleaching waste solution.

Therefore, ultrafiltration was considered before biological treatment.

Ultrafiltration can remove 50%-90% of the organochloride or AOX in section E wastewater, but the chlorophenol compounds with low molecular weight are the most toxic components of AOX, so the ultrafiltration efficiency is very low, but then biological treatment can remove 62%-90% of AOX.

 

2. By chemical sedimentation, iron salt or aluminum salt can precipitate organochloride to remove AOX.

The use of Polyethyleneiminc can also make the chlorination and alkali treatment stage of the organic deposition down, the chlorination section of AOX removal rate of 54%-84%.

The alkali treatment stage is 50%-73.

 

(3) oxidation process

 

1) during the aeration process of ultrasonic oxidation, the low-molecular weight chlorinated organics such as - chlorophenol, dichlorophenol and trichlorophenol can be removed by ultrasonic treatment for 1h.

 

2) ozone, ultraviolet radiation and powdered activated carbon were oxidized alone or in combination.

The removal rates of the low molecular weight TOX were respectively

 

32.2%--43.7%, 18.7% -- 78.7%, and 10.2% -- 53.0%, respectively. The total TOX removal rates were 82% -- 86%, 47% -- 48%, and 73% -- 74%, respectively.

Oxidation by ultraviolet irradiation alone can be called photolysis. Photolysis mainly involves the decomposition of high molecular weight AOX into C1- under the action of UV.

 

3) oxygen oxidation of bleaching wastewater in E stage can significantly remove TOCL and chroma. Lignin chloride degradation is the strongest in the early stage of oxygen treatment, which plays an important role in the removal of TOCL and chroma.

 

Alkaline hydrolysis alkaline hydrolysis is the use of various basic compounds and lignin chloride reaction.

Methods to promote AOX reduction in waste solution due to different alkaline compounds or different combinations.

The ability of AOX to reduce waste liquid is also different, usually NaOH/Ca(OH)2 or Na2S, Na0H and Ca(0H)2 combination to reduce AOX.

Reaction time - certain, high PH value, high AOX removal rate in the mixture.

 

5. Unconventional biodegradation method waste solution unconventional biodegradation method.

At present basically is to use fungus, especially the fungus that decomposes lignin, commonly used white rot, it can degrade chlorinated lignin, but need to add carbon source to produce peroxidase, degrade lignin PH value, nutrient salt, dissolved oxygen, contact stay time to affect its effect.

 

6. Electrolytic treatment electrolytic treatment USES electrodes of different compositions to conduct electrolysis at different times to obtain the required AOX removal rate. At the highest AOX removal rate, the AOX removal rate can reach more than 99%.

Keyword:

Releate News

Safe use of disinfectants commonly used in aquatic products
Safe use of disinfectants commonly used in aquatic products
Disinfectants are the most commonly used drugs in aquaculture to eliminate or kill pathogenic microorganisms and other harmful microorganisms in the external environment. According to the chemical properties can be divided into aldehyde disinfectants, base disinfectants, acid disinfectants, salt disinfectants, halogen disinfectants, dyes, oxidants, heavy metal disinfectants and other eight categories. There are many kinds of aquaculture animals in China, and the toxicity of different disinfectants to aquatic animals varies greatly. Improper use of disinfectants is easy to cause poisoning and death of fish and shrimp. However, there is still a lack of standard data on the toxicity of disinfectants in China.
See more information
Disinfectants are the most commonly used drugs in aquaculture to eliminate or kill pathogenic microorganisms and other harmful microorganisms in the external environment. According to the chemical properties can be divided into aldehyde disinfectants, base disinfectants, acid disinfectants, salt disinfectants, halogen disinfectants, dyes, oxidants, heavy metal disinfectants and other eight categories. There are many kinds of aquaculture animals in China, and the toxicity of different disinfectants to aquatic animals varies greatly. Improper use of disinfectants is easy to cause poisoning and death of fish and shrimp. However, there is still a lack of standard data on the toxicity of disinfectants in China.
Residual chlorine in tap water
Residual chlorine in tap water
Time of issue : 2023-09-08 13:51:14
一, what is the main way of disinfection and sterilization of tap water at present? China's current tap water purification methods: chlorine gas sterilization; The world's developed countries and regions tap water purification methods: ultraviolet and ozone technology sterilization. 二,Why should chlorine be added to tap water?
See more information
一, what is the main way of disinfection and sterilization of tap water at present? China's current tap water purification methods: chlorine gas sterilization; The world's developed countries and regions tap water purification methods: ultraviolet and ozone technology sterilization. 二,Why should chlorine be added to tap water?
Application of bleaching powder in aquaculture
Application of bleaching powder in aquaculture
Time of issue : 2023-08-30 13:51:36
In aquaculture, bleaching powder is mainly used in pond disinfection and prevention and treatment of bacterial fish disease. 1. Pond cleaning and disinfection. The general dosage is 20-30 grams per cubic meter of water. Dissolve the bleach powder with water first, and then sprinkle the whole pool, which can kill aquatic insects, frog eggs, fish, spiral snails and various fish disease pathogens in the water body....
See more information
In aquaculture, bleaching powder is mainly used in pond disinfection and prevention and treatment of bacterial fish disease. 1. Pond cleaning and disinfection. The general dosage is 20-30 grams per cubic meter of water. Dissolve the bleach powder with water first, and then sprinkle the whole pool, which can kill aquatic insects, frog eggs, fish, spiral snails and various fish disease pathogens in the water body....
Previous page
1
2
59

CONTACT US

HAI XING ECONOMIC DEVELOPMENT AREA, HAI XING COUNTY 061200, HEBEI 

PRODUCTS

CALCIUM HYPOCHLORITE
TCCA
SDIC
BCDMH

FEEDBACK

Username used for comment:
Customer message
Description:
验证码

© 1999-2018 北京网站建设有限公司 Copyright © 2012-2022 All Rights Reserved   Powered by www.300.cn   冀ICP备12012949号  津公网安备 12010302002173号     Seo tag