Question

now a day a lot of water purifier or a live band in the market with the help of an elder find out how they works picture and prepare a report

Answer 1

With the rapid urbanisation in the country, there has been a commensurate increase in the need for and the use of water, one of life's most essential necessities. Almost 80 percent of the water supplied for domestic use, comes out as wastewater. In most of the cases wastewater is let out untreated and it either sinks into the ground as a potential pollutant of ground water oris discharged into the natural drainage system causing pollution in downstream areas. So, there is an urgent need for treating wastewater using modern technology and recover as much usable water as possible. But the fact is a majority of towns and cities in India have either no sewerageand sewage treatment facilities or the treatment facilities are highly inadequate.Sources of wastewater include homes, farms, factories, hospitals and businesses. Faeces and urine from both humans and animals carry many disease-causing organisms. Wastewater may also contain harmful chemicals and heavy metalsknown to cause a variety of health problems. Disease-causing organisms (pathogens) from patients at hospitals can enter wastewater. Wastewater may also carry carcinogens increasing the risk of cancers among vulnerable people who could directly or indirectly come in contact with such wastewater. When untreated wastewater mixes with groundwater it can create significant health risks to people who have suppressed immune systems. Children, the elderly, and the poor are also significantly more atrisk than the general population. So, it is pertinentto properly treat wastewater before it runs down the water stream.