Water Purification is the process of removing undesirable chemicals, biological contaminants, suspended solids and gases from contaminated water. The aim is to produce water fit for a specific purposes eg for human consumption, irrigation, use in industry such as pharmaceutical, chemical, in hospitals The methods used include physical processes such as filtration,sedimentation and other biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination and the use of electromagnetic radiation such as ultraviolet light.
Large water bodies may be polluted with sewage effluent, surface runoff, or industrial pollutants. The presence of dead animals upstream is not uncommon. In most parts of the world, water may be contaminated by bacteria, protozoa or parasitic worms from human and animal waste or pathogens which use other organisms as an intermediate host. Pathogenic strains of E coli bacteria survive briefly outside the body, to infect new hosts. Groundwater pollution may occur from human activity (eg on-site sanitation systems) or might be naturally occurring (eg from Arsenic) Host of bacteria, protozoa and worms infest the water and can cause diseases like cholera, typhoid, diarrhea.
Removing these is imperative to human health. Industries employ various filter systems to remove such pollutants. Large housing societies need robust filter systems which remove pollutants of all kinds, newer ones employ such systems.
Various systems employed include boiling, filtration, sedimentation, activated carbon absorption among other.
JDLabs is involved in purification water and has a team of experts who work closely with parties interested in purification of water bodies, especially community/housing societies.
JD LABS deals in Water Purification if more info is required I shall provide.