Wednesday, 8 February 2017
Rainwater Harvesting Filter
Expression of Interest for Technology Transfer
KSCST has developed "PopUp Filter for Rainwater Harvesting" with Mr. A.R. Shivakumar as the Inventor of the equipment and has obtained the Indian Patent rights vide No.408/CHE/2005A on 11-04-2005 for effectively collecting the rainwater for re-use or for ground water recharge at residential / commercial places.
Features of PopUp Filter
Rainwater collected on the roof is pure and clean. However, many substances (leaves, bird droppings, dust, etc.,) mix with this pure water on the roof. The suspended impurities has to be filtered before the rainwater is stored. Water mixed with soluble impurities has to be allowed to flow and the 'first flush' of rainwater from the relatively cleaner and purer subsequent rain water is to be collected.
PopUp filter is a simple device and very flexible to install in varying field conditions and is working satisfactorily for filtering roof top rainwater in many residential and smaller institutional or industrial buildings.
KSCST intends to collaborate with a manufacturing firm for mass production and marketing of the product "PopUp Filter for Rainwater Harvesting" anywhere in India by Transfer of the Technology and Patent Rights to prospective firm / manufacturer for mass production and marketing for a period of 5 years.
Hence Expression of interest is invited from the manufacturers.
Sunday, 18 September 2016
Here's how Bengaluru can look beyond Cauvery for water
BENGALURU: Bengaluru is once again facing the prospect of shortage of drinking water, highlighting our heavy dependence on Cauvery river water for drinking. Amidst the emotional scenes witnessed over the past few days over sharing of Cauvery waters, is our own unwillingness to adopt even minimal measures to conserve and recycle water.
At present, Bengaluru requires 1,450 million litres per day (mld) and about 19 tmcft of water per year from Cauvery alone. As population expands, it is difficult to sustain drinking water supply to the city, which is already facing a shortfall.
It is estimated that Bengaluru has the potential to harness 22 tmcft per year from its sewage and storm water drains. Every water conservation technique that is implemented can cut down the use of piped water considerably.
“Any city, in the future, cannot depend on rivers or dams alone for water supply. There has to be better planning. About 50 per cent of it can come from dams and rivers, 20 per cent from rain water harvesting (RWH), 20 per cent from recharged borewells and 10 per cent should be recycled water. This is the only way we can sustain our supply,” says A R Shivakumar, a scientist at the Karnataka State council for Science and Technology at the Indian Institute of Science.
Despite Bangalore Water Supply and Sewerage Board (BWSSB) making it mandatory for building constructed in 30x40ft and bigger dimension sites to have RWH mechanisms, there are only a few takers. Also, there has been no punitive action against those who have failed to implement it.
Shivakumar says that around 1,00,000 homes in Bengaluru have adopted RWH. “It is not a big number compared to more than 20 lakh properties in Bengaluru. But it is a good effort and hopefully will catch on,” he said.
Water recycling in bigger complexes is now catching up in new buildings, but the old ones are hesitant. Recycled water can be used for secondary purposes like gardens, construction and washing vehicles. “A place like Cubbon Park has a state-of-the-art recycling plant and the water is used for gardens. The results are there for all to see. It will not hurt the government to set up treatment plants to recycle the waste generated around its office buildings like M S Building and Vidhana Soudha. This sets a good example and will encourage people to follow suit,” Shivakumar said.
He also blames the unaccounted water that comes via pipelines and then just disappears. According to BWSSB’s own admission, these losses are between 40-45 per cent. “Norms specify that these losses should be around 15 per cent. But, despite the civic agency’s best efforts, these levels have not fallen to below 40 per cent,” says former Chief Secretary A Ravindra.
He also said that protection of groundwater resources is one of the major tasks to be undertaken to improve the situation in the city.
“RWH needs more compliance. The government can also encourage people by constructing large ponds to collect rainwater. Restoration of tanks and lakes and groundwater recharging can help meet the drinking needs of the population to a large extent,” he adds.
Message on BWSSB website
A message on BWSSB website reads: “Since there have been drought conditions prevailing in Cauvery basin which have resulted in minimal flow into the reservoirs in the month of August and September, enough Cauvery water may not be available in the coming months. As the rainfall prediction is meager, the BWSSB requests all its consumers to consume and use water judiciously.”
5 ways to save water
Water conservation experts say that by following these simple steps, the city can save a lot of water over time
It could be as simple as placing a bucket below the pipe that channels the rainwater in your house, but BWSSB rules make it a little more comprehensive and mandatory. It is the simplest and most essential form of conservation residents can adopt and works on the premise that there should be 20 litres or more tank capacity per square metre of roof area. Unfortunately, at present, there are only an estimated 1 lakh homes which have implemented this but wider application can easily solve our water woes. We can save around 23 tmcft per year this way.
Recharging lakes and groundwater
Recharging lakes is a crucial component of ensuring self-reliance in terms of water supply. Not only do we manage to fill our lakes, but we can also recharge the groundwater and aquifers. However, the city’s lakes are composed of silt consisting of sewage, waste chemicals, organic waste, dead vegetation and heavy metals turning the bottom of the lake into a cement-like impermeable layer. Even if the water permeates, it will poison the underground water table. Stopping sewage inflow into lakes and clearing out catchment areas is very essential.
Sewage Treatment Plants
Almost every lake in the city has copious amounts of sewage flowing into them, turning them into a frothy nightmare. Not only are STPs necessary to stop this, they can be adopted on a smaller scale in apartments, commercial and government buildings. Even if people are not comfortable using this recycled water for domestic purposes, there are plenty of uses like watering gardens, washing vehicles and reusing them for flushing toilets.
According to BWSSB, around 40-45 per cent of the Cauvery water is lost and pegged as ‘unaccountable losses’. That is around 650 mld. The water lost due to leakage in pipes is negligible. Most of this water is pilfered, which means illegal water connections are drawn right from localities to large industries and hotels. Efforts to control this form of losses are lukewarm. Politicians do not want to upset their vote banks and only strong political will can bring this under control.
Tariffs and incentives
At the lowest slab, water supply from BWSSB means that a house gets 1,000 litres of water for a measly `8. The higher slabs are not much of a deterrent either. An expert on water conservation techniques says that the government should take the bold step of providing around 10,000 litres per month (going by WHO’s recommendation of 100 litres/person/day) at a low rate and then hike the tariffs exorbitantly. That would make everyone sit up and take notice and consequently choose water conservation methods to avoid paying a higher tariff.
Bengaluru man hasn't used Cauvery water for past 21 years
BENGALURU: When A R Shivakumar speaks, he reflects a belief that while nature uses patience and simplicity to provide for us, we complicate it, because over time humans have lost both the traits. After all, the principal investigator of Rainwater Harvesting (RWH) at Karnataka State Council for Science and Technology (KSCST) has always pursued simplicity to solve complicated issues faced by society.
|Shivakumar's model house|
Having undertaken the RWH project as a mission and successfully implementing it in thousands of households in the state, he was wise enough to know that it has to be part of a government policy. So, while he devised ways to harvest rain, even patenting a filter to purify the water, parallelly he was involved in training programmes.
“I joined KSCST in 1981 when my solo engineering college project on extracting fibre from Sisal plant was adopted by the Khadi and Village Industries Commission. I was involved in smart wood stoves for rural areas. From 1984 to 1994, I was involved in studying the energy curve of Karnataka, the solution in solar water heaters and generating awareness in 174 taluks,” says Shivakumar.
After 10 years, the solar heater market took over. It succeeded because there was a business model which appealed to the plumbers, manufacturers and dealers — the key drivers. In 1994, Shivakumar focused on RWH, but soon realised that unlike solar water heaters, it was not a product, had no business model, and was hence less appealing.
After a lot of brainstorming, he felt the solution could lie in the home he was planning to construct. He took the challenge of not using even a drop of water from the corporation.
“After research, I approached the Indian Meteorological Department for 100 years of rain data of Bengaluru. I realised the city received close to 1,000 mm of annual rainfall and the gap between two successive rainfalls was only 100 days. Based on this, I built my house and for the past 21 years have not used a drop of Cauvery water,” he says.
In 1996, a Norwegian councillor heard about him when Shivakumar was the project manager for an Indo-Norwegian Environment Programme, working on cleaning lakes and solid waste management. “They offered to fund the project on a large scale,” he recollects.
Then began the tedious process of convincing the government. His initial suggestion to make Vidyaranyapura Layout self-sufficient using RWH was rejected. He then advised taking up buildings like Vidhana Soudha, BBMP head office and GPO. “I took up 10 projects in landmark buildings and used various technologies for RWH,” says Shivakumar, also the brain behind the country’s first rainwater harvesting theme park, Sir M Visvesvaraya Rainwater Harvesting Theme Park in Jayanagar.
But the policy makers never deemed it a priority, until one incident. Shivakumar says, “I was travelling near the then BMP office, when I saw workers demolishing an iconic structure, a 7.5 lakh litre swimming pool built by the Britishers. I met the commissioner and suggested converting it into a RWH tank. He accepted. He created a committee to look into RWH which led to a change in the building bylaws. RWH was included in the bylaws for the first time in the country in 2002. But from 2002 to 2008, I struggled because implementation of the bylaw was only on paper.”
He convinced the then BWSSB chairman, but the BWSSB Act had to be amended, which meant assembly’s nod. “In a month, every MLA endorsed it. By November 2009, RWH had become compulsory in the city for any new connection,” he says.
He has since moved to policy making. Along with Environmental Management & Policy Research Institute, he conducts programmes for IAS and IFS officers. “The idea is to develop policies for their departments keeping RWH in mind,” he says.
Thursday, 15 September 2016
Thursday, 21 July 2016
AR Shivakumar @ TEDx Bangalore on 16th July 2016
Water is one of the most important components of all living beings.
We use around 100 to 150 litre per person per day directly.
Virtual use is as high as 11,500 litre per day per person - 37 lt for 1 lt milk, 2500 lt for 1kg sugar, 100 lt for 1 unit of electricity....which looks scary..
I do not buy the statement that there is water scarcity in this world.
There is plenty of water to fulfil all needs, not only human but for all other living creatures on this earth. Unfortunately we have not been able to keep up a sustainable and equitable distribution of clean and safe water for all.
We moved from decentralised and sustainable to centralised and unsustainable and may be to -water as a commodity..
Water on this earth has remained same in quantity for ages - not a drop less not a drop more. Water we use is the same water molecules what dinosaurs drank. water cannot be manufactured nor destroyed. Can anyone destroy a drop of water or bring a fresh drop of water to this earth - NO. Have you heard of a factory or a mill to produce water anywhere in the world.
Water is a wonder fluid which occurs naturally and rain is our only source for purest form of water. All other source / forms of water are derived from rainwater.
Living with nature and making nature to work overtime for you - not to abuse
All our needs can be met from the gifts of nature around us
Here is an example - doable and also sustainable:
Sourabha my house in Vijayanagar, Bangalore derives most of the daily needs from nature. Built during 1994, has sustained by harvesting rainwater for all our needs including drinking water for over 20 ecofriendly years. We do not have city - BWSSB water pipe connection to our house, we have not paid a rupee water bill in the last 20 years.
Rainwater from the roof of our house is filtered at four locations and stored at various levels in tanks and underground sumps. We have 45,000 litre total storage capacity and we use around 400 litre per day for our family. Studying 100 years daily rainfall data, I found out Bangalore has only around 100 dry days between two good successive rains. For 100 days 400x100=40,000 litre is good enough and we have 5,000 lt extra making it 45,000 lt storage of rainwater. In a plot of 2400 sqft (40ftX60ft) around 2,20,000 litre can be harvested in Bangalore. Around 1,50,000 lt is harvested from roof for storing and the rest is recharged in to the ground for a social cause. This way not a drop of rainwater flows out of Sourabha.
Though we have plenty, we reuse used water in our house - washing machine discharge soap/detergent water is used to flush toilets, kitchen wash water is used for watering plants and trees around the house, plants are healthier with vitamins and mineral rich organic kitchen used water. Around 20 to 30% of water is reused each day.
All organic waste is treated on site - earthworms convert all the organic garbage into manure for hundreds of plants and trees around Sourabha. We have not contributed to the city garbage collection other than recyclables and rejects like plastics, glass bottles and metal cans.
Tons and tons of organic garbage for years is now beautiful green plants and trees around the house. Fresh and clean air encapsulates our house and also keeps the environment cool. We do not use air conditioners nor fans even in deep summer (except rooms on first floor). The green curtain of plants and trees not only provide fresh and clean air but also home to number of chirping birds, colourful butterflies, insects, bees and many more. Sourabha looks like their home and we are guests of nature inside Sourabha.
Sun is the provider of energy through solar water heater, solar electricity for lighting and natural light through sky lights.
Rattrap design of walls to keep the house thermally insulated, bright whit painted roof to reflect solar radiation and keep the house cool, water bodies around the house to add moisture to the air and also home for aquatic life like lotus, fish, turtles and many more. Water bodies on the roof as bird bath and to provide water to a number of birds. Coconut husk and shell as pots for plants and many orchids. A micro environment to fill nature to our life at Sourabha in the central district of Bangalore city.
These are doable and simple concepts for each one of us to adopt.
The bottom line for a nature friendly sustainable living in an urban environment - 400 lt of water per day per family, around 100 units of electricity per month to fulfil all our luxury, one gas cylinder to support cooking for 75 days and most important only 2.5 kg of dry / recyclable waste per WEEK.
Several of these water conservation and rainwater harvesting concepts are now policy guidelines provided from my organisation KSCST at Indian Institute of Science and are being implemented by the Government for a better tomorrow. Two help desks, one at IISc campus and other at Jayanagar 5th block supported by BWSSB are providing training, awareness and consultation for individuals, institutions and corporate houses.
Hundred thousand Bangalurians are harvesting RAINWATER, why not you?
Your HOME a Science lab - “Bring out the Scientist in YOU”
Get your voltage stabilizer to set curd and ferment batter
Thin Silver sheet gives you zero bacteria drinking water - no electricity, no chemicals
Switch the refrigerator door left to right and save 28% electricity
No entry to cockroaches inside your house!
Back to basics: Paint the roof (and the city) white to save power 30C
Sky lights at the roof and Mirror, mirror on the wall...no more artificial light during daytime
Allow the scientist inside you to think...
Be the change you want to see
Practice what you preach
Each one of us can be the ambassadors of positive change in our society
Harvest Rainwater and a Host of Benefits... Thank you.
(supported by 45 slides)
email@example.com Saturday, 16 July 16
Tuesday, 21 June 2016
Meet the 'Rain Catcher' from Bengaluru
AR Shivakumar has not had to pay a single penny to the
AR Shivakumar has not had to pay a single penny to the
corporation for water in the past 20 years.
Read full story here: http://bit.ly/1RYcCim
More infor mation from the following links: