Treatment and Purification

The UN-Water website's World Water Day 2010 section, provides access to a range of informative, educational and advocacy material on water.

The documents and publications section includes a range of documents related to water quality, drinking water quality and public health, and water safety planning and management including the safe use of wastewater for agriculture and aquaculture.

The term skimming well is used for any technique employed with an intention to extract relatively freshwater from the upper zone of the fresh-saline aquifer. The types of skimming wells include: the conventional single strainer well, multi-strainers wells, scavenger wells, radial collector wells and dug wells.

Dear Users of IWP,

This field report describes the work of WaterHealth India (WHI), in organising safe drinking water using low-cost water purification units, in several villages of Andhra Pradesh. The work was taken up with financial support from IFMR Trust.

Vinjinampadu village in Guntur district, Andhra Pradesh, is one of the villages where WHI worked to establish the unit. The village had lacked potable water supply, because of which its people suffered from a range of water-borne diseases. The situation was similar in many of the other villages in which WHI initiated this work.

This paper by A Jagadeesh of RMK Engineering College, describes the design and testing of a portable, low-cost, and low maintenance solar disinfection unit, that can provide potable water. This system was tested with bore water, well as well as with waste water. In 5 hours, the unit eradicated 99.99% of the bacteria contained in the water samples.

This unit can provide about 6 liters of pure drinking water and larger units can be fabricated for providing safe drinking water at a community level.

Highlights

• Kochi: To Get Rs 100 Crore Modern Sewerage System
• Punjab: Rs 53.58 Crore New Water Supply & Sewerage Project
• Pune: To Construct 120 MLD Water Filtration Plant
• Water.Org: Launches India WaterCredit Forum

Is there anyone in India who is willing to develop a multi-stage Saferain unit with me?
Imagine a 5000 sq metre factory in New Delhi, (or Shanghai, or wherever).

The air is polluted, the roof is polluted, and, yet, I say that potable. or near so, can be delivered in a rain event. The following is a cut and paste. This is how it's

For Immediate Release

Underwriters Laboratories Certifies Kimberlite Chemicals for Health Effects in Drinking water
Kimberlite Chemicals Becomes First Indian Company to Earn UL
Certification for Antiscalant Water Treatment Chemicals

Bangalore, India, April 14 2010 – Underwriters Laboratories (UL), a global leader in drinking water quality and safety, today announced that Kimberlite Chemicals India Pvt.  Ltd., received UL certification for its antiscalant water treatment chemicals. Kimberlite’s antiscalant water treatment chemicals will now bear the UL Classified Water Quality Mark, indicating certification to ANSI/NSF Standard 60 for health effects.

UL launched its drinking water product certification program in India in 2009 and has been working with a number of Indian companies on a broad range of products including disinfection and oxidation chemicals, coagulants, drinking water treatment units, gaskets, butterfly valves, sediment filter cartridges and activated carbon.  Kimberlite, a renowned company known for its world-class technology product and service in the field of specialty chemicals and coatings, is the first Indian manufacturer to be certified through UL’s water program for antiscalant water treatment chemicals.

UL’s certification of Kimberlite’s antiscalant chemicals provides verification that these chemicals have been independently tested and validated to meet both industry standards for health effects in drinking water as well as UL’s rigorous certification requirements. Antiscalant chemicals are used to protect reverse osmosis (RO) membrane life and are used in industrial RO purifiers.

This research paper describes an indigenous water treatment method, that uses Moringa oleifera (Drumstick) seeds in the form of a water-soluble extract in suspension, resulting in an effective natural clarification agent for highly turbid and untreated pathogenic surface water.

This research paper attempts to understand and map the Reverse Osmosis (RO) phenomenon, a technology that is turning out to be an important solution for drinking water treatment in rural Gujarat. Treatment plants with capacity ranging from 10 litres per hour (lph) to 6000 lph are now supplying drinking water in several hundred villages of the state. Small sized plants with capacity < 20 lph are used by individual families whereas medium to large sized plants (>100 lph) are being used for public consumption.