Water Treatment Technology

Judgment of the National Green Tribunal regarding plywood factories operating in Yamuna Nagar, Haryana, 27/05/2025

Judgment of the National Green Tribunal, May 27, 2025 in the matter of Sumit Saini Vs Shree Ram Steel Industries & Others. Sumit Saini, resident of village Damla, District Yamuna Nagar, Haryana had sent a letter petition dated May 14, 2022 to the NGT. The application said that around 25 …

UV for water and wastewater disinfection applications

The article focuses on some of the basic aspects of UV disinfection and the selection criteria to be followed when choosing a UV system to ensure maximum efficiency.

Pure myth

When was the last time you drank water straight from the tap at your house to slake thirst on a hot summer day, without hesitation. Chances are you would have at least boiled or filtered the water. The public water supply in India is so unreliable that the urban middle …

Fortune cookie

Talk about his company's fortunes is likely to elicit a beaming smile from Mahesh Gupta. Kent RO systems' managing director says that his company's profits grew 40 times between 2002-2003 and 2007-2008: from Rs 2.5 crore to Rs 100 crore. Other water purifier manufacturers also say that business is good. …

A film star speaks

Media attention is routine stuff for film star Hema Malini. But in August 2007 the spotlight was on her for a question she asked in Parliament as a Rajya Sabha member The film star, who is also a brand ambassador for a leading RO water company, asked the minister of …

Costly. But how effective?

A water purifier has to deal with physical, chemical and biological adulterants including dissolved solids, heavy metals and pesticides. Besides, all contaminants have different characteristics like molecular weight and size, water solubility, volatility and ability to react with oxygen. So, water treatment is a multi-pronged process, and the contaminant challenge …

Think before you use RO

The system wastes water, and is expensive According to industry estimates, 5.2 million households use water purifiers of which about 42 per cent (or 2.1 million households) employs RO. Assuming every household has 5 members; Total water consumed = 21 million litres per day (mld) (if per capita consumption is …

Household tips

How does one select a water filter? Step 1: Understand raw water quality. Find out the contaminants in water, its hardness and its total dissolved solid contents. Also find out if the water has heavy metals, pesticides or any other chemical Step 2: Find out what is the desirable water …

Purifying the purifier

A consumer looking for a water purifier is most likely to be confronted with a fusillade of quality claims. K J Nath, president, Institution of Public Health Engineers in Kolkata is not sure about their veracity. "A lot of the tall claims by private players cannot be substantiated scientifically,' he …

Tall claims

We asked a few manufacturers about the standards they adhere to. Here is what they said Philips Electronics India: Gold seal Class A certified by the US-based Water Quality Association, certified by KIWA Water Research of the Netherlands and BIS certification for UV filters KENT RO systems: Certificates from Shriram …

Crying out for action

Industry sources exude confidence about the water purifier segment. Manufacturers peg their hopes on the increasing purchasing power of the middle class in cities, small towns and the suburbs. The water filter market thrives on a vicious circle. With municipalities failing to provide safe potable water, many turn to groundwater; …

Technology and economics of point of use (POU) reverse osmosis drinking water filters

This article describes the Reverse Osmosis technology and its cost economics to convert the brackish ground water and tap water of poor quality to potable water.

Purification with a pinch of salt

Climate change, growing populations and political concerns are prompting governments and investors from California to China to take a fresh look at desalination. March 20, 2008

Science and technology for water purification in the coming decades

One of the most pervasive problems afflicting people throughout the world is inadequate access to clean water and sanitation. Problems with water are expected to grow worse in the coming decades, with water scarcity occurring globally, even in regions currently considered water-rich. Addressing these problems calls out for a tremendous …

Water: Purification with a pinch of salt

Climate change, growing populations and political concerns are prompting governments and investors from California to China to take a fresh look at desalination : a report. March 20, 2008

Green building to come up in Borivali

In a cityscape dotted by energy guzzling high-rises, the municipal corporation has decided to set the precedent for going green. The first ever civic green building complex is all set to come up on a sprawling 52,000 sq m plot in Borivali. The project is part of the BMC's upgradation …

No let-up in Delhis water crisis

Haryana continues to withhold city's share of drinking water Water production in two of the Capital's water treatment plants has also come down "We are hoping the CWC will get Haryana to release more water to our demand' NEW DELHI: There is no let-up in Delhi's water crisis as Haryana …

Safe drinking water fetches top marks for this govt school

Provision of pure water has resulted in a marked decrease in the number of absentees BY D MADHAVAN For 3,000 students of the Government Higher Secondary School in Anakaputhur, pure drinking water is only a few steps away thanks to a water treatment plant on the premises. Allegedly the first …

Cleaner water with a wand and no magic required

Travellers who don't trust the water from a mountain stream or a hotel-room faucet have often used chemicals or filters to purify it. Now they have a high-tech option as well: swirl the water with a portable, lightweight wand that beams rays of ultraviolet light. The wand can clean up …

Modern motor controls save energy in desalination

The introduction of the axial piston pumps and the development of energy recovery units especially for seawater reverse osmosis has changed the system design dramatically and reduced the energy consumption by up to 80% in these installations. Oct-Dec 2007

Arsenic removal household filter for small community

Natural adsorbent, laterite soil was selected and found to be an effective adsorbent for arsenic removal from arsenic bearing drinking water. The real arsenic bearing groundwater was collected from Nivedita Palli, 24 Paraganas, one of the arsenic affected areas of West Bengal.

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