What Is Involved in Bleaching Pulp?

The natural-colored pulp is treated with a bleaching agent to remove colored substances and other impurities in the pulp to improve whiteness and purity. This kind of pulp is bleached pulp.

Bleached pulp

1. The ultrafiltration method is difficult to be decomposed by microorganisms because the bleaching waste liquid contains high molecular weight parts. Therefore, it is considered to perform ultrafiltration treatment before biological treatment. Ultrafiltration can remove 50% -90% of organic chlorides or AOX in wastewater in section E. However, low molecular weight chlorophenols are the most toxic components in AOX, and the efficiency of ultrafiltration is very low. However, 62% -90% of AOX can be removed by biological treatment.

2. Chemical sedimentation

Closed operation to enhance ventilation. Operators must be specially trained and strictly abide by the operating procedures. It is recommended that the operator wear a hood-type electric air-supply filter-type dust-proof respirator, a rubberized gas protective clothing, and a neoprene glove. Away from fire and heat sources, smoking is strictly prohibited in the workplace. Keep away from flammable and combustible materials. Avoid generating dust. Avoid contact with reducing agents and acids. Handle with care when handling to prevent damage to packaging and containers. Do not shake, bump or rub. Equipped with the corresponding variety and quantity of fire fighting equipment and leakage emergency treatment equipment. Empty containers may be harmful residues.

1. In the production of tap water, the bleach powder is diluted 10 times and added;

2. When cleaning with bleach water, the bleach powder should be diluted 100 times, that is, 1 part of the bleach powder plus 99 parts of water and stir well for 30 minutes to precipitate, and then the supernatant can be used.

Storage requirements :

Do not store with other chemicals, such as polyferric sulfate, in a cool, ventilated warehouse. Keep away from fire and heat sources. The storage temperature does not exceed 30 , and the relative humidity does not exceed 80%. Packaging is required to be sealed and not in contact with air. It should be stored separately from reducing agents, acids, flammable materials, etc., and should not be mixed. Should not be stored in large quantities or for a long time. The storage area should be equipped with suitable materials to contain spills.