Commonly Used Chemicals for Wastewater Treatment

  Wastewater treatment is an important task to protect the environment and maintain human health, and chemicals play a vital role in the wastewater treatment process. This article will introduce the types of chemicals commonly used in wastewater treatment, their uses and their standard applications to help you better understand and apply them.

• Types of agents and uses

1. Ferric chloride (FeCl3)

FeCl3 is a commonly used coagulant, widely used in flocculation and sedimentation processes in wastewater treatment. Its main function is to aggregate suspended and particulate matter into larger clusters for easy precipitation and separation.

2. Activated carbon
Activated carbon is an adsorbent used to remove organic matter and odor substances from sewage. Its highly porous structure adsorbs harmful substances in sewage and improves water purification.

3. Potassium permanganate
Potassium permanganate is a strong oxidizing agent, commonly used to oxidize organic and inorganic substances in sewage. It can rapidly decompose the organic matter in sewage and increase the redox potential of water, thus improving the water quality.

4. Polymericaluminum chloride (PAC)
PAC is a coagulant used as an alternative to traditional ferric chloride. It has a higher flocculation effect and lower residual iron ion content, which can effectively reduce pollutants in water quality.

5. Bio-enzyme
Bio-enzyme is a bioactive agent used to accelerate the degradation process of organic matter in wastewater. It can decompose organic substances, promote the growth and metabolism of microorganisms, and improve the effect of sewage treatment.

• Standard method of use of pharmaceutical agents

1. Determine the dosage

According to the actual situation of the sewage treatment plant, combined with the water quality analysis results and treatment process requirements, the dosage of chemicals is determined. In general, the dosage should be calculated reasonably according to the sewage flow and water quality characteristics.

2. Dosage method

According to the nature of the agent and the requirements of the treatment process, the appropriate dosing method is selected. The common dosing methods include solution dosing, dry powder dosing and suspension dosing.

3. Add more medicine

According to the needs of the treatment process, determine the dosage point of the drug. In general, the agent should be added to the sewage as evenly as possible to ensure that the agent is fully mixed with the sewage.

4. Dosage time

According to the requirements of the treatment process, the dosing time of the drug is determined. In general, the dosing time of the agent should be matched with the key steps in the sewage treatment process to ensure that the agent can fully play its role.

5. Dosage sequence

According to the requirements of the treatment process, the dosing sequence of the drug is determined. In general, coagulants are added first, then adsorbents and oxidants, and finally biological activity.

• Precautions for drug use

1. Pay attention to the storage and custody of the agent, avoid direct sunlight and humid environment, so as not to affect the effect and stability of the agent.

2. When using the agent, wear protective equipment to avoid direct contact with the agent, so as not to cause harm to the human body.

3. Regularly test the quality and effect of the agent, and timely adjust the dosage and dosing method to ensure the stability and optimization of the sewage treatment effect.

4. Pay attention to the treatment of pharmaceutical waste, and classify, package and dispose of it in accordance with relevant regulations to prevent pollution to the environment.

  Commonly used chemicals in wastewater treatment play an important role in improving the effect of wastewater treatment and water purification. Correct selection and use of pharmaceuticals, according to the standard use method for dosing, can effectively reduce harmful substances in sewage, to protect the environment and human health. At the same time, we also need to pay attention to the storage, custody and waste disposal of the chemicals to ensure the safety and environmental protection of the chemicals.

  Hope this passage can help you better understand the chemicals used in wastewater treatment and we all can make a little contribution to environmental protection and sustainable use of water resources.