types of coagulants in water treatment pdf

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Sewage treatment plants (STPs) are critical infrastructures designed to process and purify wastewater before it is released into the environment or reused. The treatment of sewage is a complex process that not only aims to eliminate harmful substances but also to protect public health and the environment. To achieve these goals, various chemicals are employed in STPs to aid in the treatment process. This article will explore the key chemicals used in sewage treatment, their functions, and their significance in ensuring effective wastewater management.


Erythromycin exerts its antibacterial effects primarily through a mechanism known as ribosomal inhibition. By binding to the 50S subunit of the bacterial ribosome, erythromycin disrupts the translation process, preventing the synthesis of essential proteins that bacteria need for growth and reproduction. This inhibition leads to bacteriostatic effects, meaning that it stops bacteria from multiplying but does not necessarily kill them outright, making it suitable for treating certain infections where the immune system can clear the bacteria.


Venous Ulcers: Pentoxifylline may also be used in the management of venous ulcers, which are open sores that develop on the legs or feet due to impaired venous circulation. By enhancing blood flow and tissue oxygenation, pentoxifylline aids in wound healing and promotes the closure of venous ulcers.

H3NSO3, commonly known as thioacetic acid or thiolactic acid, is a sulfur-containing organic compound that possesses unique chemical properties. It has garnered attention in various industrial applications, including pharmaceuticals, agriculture, and chemical synthesis. Due to its versatility, H3NSO3 acid is increasingly sought after, leading to a growing market for its sale.


Emergency Situations: Sevoflurane’s rapid onset makes it valuable in emergency scenarios where immediate anesthesia is required. Its quick induction helps stabilize patients swiftly, especially in situations where intravenous access might be challenging.

In addition to disinfectants, various chemicals are used to treat suspended solids and turbidity in water. Coagulants, such as aluminum sulfate (alum) and ferric chloride, are added to facilitate the coagulation process, where small particles clump together to form larger aggregates known as flocs. These flocs can then be easily removed, resulting in clearer water. Flocculation agents can further assist in this process, enhancing the removal of impurities.


5. Stress Reduction

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