जनरेटर केमिकल इज यूज टू मेक द फाइनल सस्पेंडेड पार्टिकल सेटल डाउन क्विकली नेम द केमिकल एंड द प्रोसेस
Answers
Explanation:
You are here
SSWM University Course
Module 6: Disaster Situations: Planning and Preparedness
Further Resources: Water Purification
Sedimentation
Author/Compiled by
Raju Shrestha (Environment and Public Health Organization (ENPHO))
Dorothee Spuhler (seecon international gmbh)
Executive Summary
Sedimentation is recommended as simple pre-treatment of water prior to application of other purification treatments such as filtration and disinfection methods. It removes undesirable small particulate suspended matters (sand, silt and clay) and some biological contaminants from water under the influence of gravity. The longer the water is sedimented, the more the suspended solids and pathogens will settle to the bottom of the container. Adding special chemicals or some natural coagulants can accelerate sedimentation. Three common chemicals used are aluminium sulphate, polyaluminium chloride (also known as PAC or liquid alum) and ferric sulphate. 'PUR' is a powder product containing both coagulants and disinfectant. Some native plants like prickly pear cactus, Moringa seeds, broad beans and Fava beans have all been traditionally used as natural coagulant to help sediment water in a number of countries in Africa and Latin America.