Changing Scene of Water Purification
In a country of 1.37 billion people, water is an important asset. With so many people, access to clean drinking water is quite hard sometimes but also pertinent. This life-retaining liquid also happens to carry many disease-causing bacteria and harmful chemicals. Demand for water filtration and water purifiers have rightfully increased. They are no longer a luxury item that is only available for a few.
Problem of clean water
Water makes up to 60 percent of the human body and doctors recommend an adult human being to drink at least 2 litres of water daily. That’s easier than done. With water level depleting in all major water bodies around us, access to clean water daily becomes a challenge. Combined with the fact around 80 percent of India’s water is polluted, the problem gets worse. Thankfully the water filtration industry is catching up with newer technology to help solve this issue.
Pollutants in water
To understand what pollutants water carry, it is pertinent to know where our water comes from. There are two main water supply sources in India: municipal water supply and ground water supply. Water from both the sources are not safe to drink straight from the tap. The municipal water supply’s main contaminant is chlorine, which even though is added to purify the water but too much of it can cause hard to the human body. The ground water supply without any doubt contains impurities like sand, mud, bacteria and virus.
Water quality is measured in levels of Total Dissolved Solids or TDS in water. The more the TDS, the worse the water quality is. The TDS has been found to be higher in ground water and often varies from place to place.
Types of water purification devices
In the market today, we have many different kinds of water purifiers. All of them are differentiated on the basis of how they purify water. There are three major water filtration systems:
- RO water filter:
Reverse Osmosis or RO water purifiers uses a system of applying pressure through a semi -permeable membrane to remove contaminants. This helps eliminate impurities that is often invisible to the naked eye. Most RO water filters also have UV filters built into them to kill more viruses and bacteria. The RO water filters usually run on electricity and can produce up to 15 litres of clean water in a day.
- UV water filter:
As the name says, Ultraviolet water filters or UV water filters purify water using ultraviolet rays. High intensity UV rays is used to kill any disease causing viruses it might have. These filters also have external pre-filters and a carbon filter to remove dissolved or undissolved contaminants.
- Gravity water filter:
Gravity water filters or Ultra-Filtration water filters, uses semi-permeable membranes similar to a RO water purifier but the pores are larger. These water filtration devices do not usually run on electricity and depend on gravity on pass water from one level to the next. They too usually have a carbon filter built into them.