Following coagulation, sedimentation typically occurs. This is where the heavier flocs settle to the bottom of the treatment tank, allowing clearer water to be siphoned off from the top. To further enhance the removal of pathogens and dissolved substances, chlorination is frequently employed. Chlorine is a powerful disinfectant that effectively kills bacteria, viruses, and other microorganisms that may be present in water. However, it is crucial to control the concentration of chlorine, as excessive amounts can lead to the formation of harmful byproducts.
Finally, the handbook encourages continued research and innovation in the field of plastic and polymer additives. As new materials and technologies emerge, the ongoing evolution of analytical methods will be essential to keep pace. Collaborative efforts between academia, industry, and regulatory bodies will contribute to the development of safer, more effective additives and enhance our understanding of their environmental and health impacts.
Flocculants are used in conjunction with coagulants to enhance the aggregation of particles into larger clusters (flocs) that can be easily removed. Some commonly used flocculants include synthetic polymers such as polyacrylamide. The addition of flocculants helps improve the efficiency of the sedimentation process, leading to clearer water and reducing the burden on subsequent filtration stages.