Tackling water shortages with ‘Star Wars’ tech

When a extreme drought hit the Indian metropolis of Kozhikode, also referred to as Calicut, in 2016, residents together with pupil Swapnil Shrivastav had entry to a restricted quantity of water every day.

“We had been rationed to 2 buckets of water a day, which we collected from water tanks,” he says.

Whereas he says it’s not unusual for water provide points to impression elements of India, it was a tricky month for Mr Shrivastav and others within the area. “It was a really humid space; it was unmanageable.”

Mr Shrivastav was already concerned about water shortage having gained a pupil competitors in 2012 on imagining the way forward for water in cities, however the expertise pushed him to discover options.

“One factor of inspiration was from Star Wars the place there’s an air to water machine. I assumed why don’t we give it a strive? It was extra of a curiosity mission.”

A number of years later, in 2019, that concept led him, Govinda Balaji and Venkatesh Raja to arrange Uravu Labs, a Bangalore-based startup.

Their system converts air to water utilizing atmospheric water turbines that include a liquid desiccant, which absorbs moisture from the air.

Utilizing daylight or renewable electrical energy they warmth the desiccant to 65C which releases the moisture, which might then be condensed into consuming water.

Mr Shrivastav says the entire course of takes about 12 hours. Immediately every unit produces about 2,000 litres of consuming water.

Nevertheless, whereas his imaginative and prescient was to provide consuming water to communities going through water shortages, he says it wasn’t financially viable.

“We realised the tech nonetheless wants extra time to scale up and are available down in price,” says Mr Shrivastav. “Or somebody ought to fund it, however we haven’t discovered the assist in India.”

As an alternative, they at the moment promote the water to 40 purchasers within the hospitality trade, who in flip use it to offer consuming water for purchasers.

“We tried non-profit and CSR departments [corporate social responsibility]… however many corporations shrink back from tech. They thought it wouldn’t work. We needed to shift to business consumption purposes as they had been able to pay us and it’s a sustainability driver for them.”

Water shortages aren’t new, however many international locations, particularly within the world south, are experiencing local weather change-related intense drought and flooding that contaminates water sources.

Greater than 50% of the worldwide inhabitants – 4 billion folks – expertise water shortfalls a minimum of as soon as a month, whereas by 2025, 1.eight billion individuals are anticipated to be residing in international locations or areas with “absolute” water shortage, in response to the Meals and Agriculture Group of the United Nations.

May atmospheric water technology know-how be the reply? Power environment friendly – it may be powered by renewable sources – it’s a method of offering a recent supply of water with out the necessity for conventional water infrastructure, making it a sexy possibility in distant places.

There seems to be a marketplace for the know-how. Valued at $3.4bn (£2.7bn) in 2022, the atmospheric water technology market is predicted to be value $13.5bn in 2032, in response to a report by World Market Insights.

There are two primary strategies for atmospheric water technology. Firstly, there’s the cooling and condensation course of which cools humid air to its dew level, inflicting water vapour to condense into liquid water.

The second is a desiccant-based system which makes use of hygroscopic supplies to soak up moisture from the air, then launch it by a heating course of, he says.

Via her social enterprise Majik Water, co-founder and chief govt Beth Koigi manages about 40 atmospheric water generator items throughout arid and semi-arid areas throughout Kenya, utilizing a cooling and condensation-based methods to seize moisture from the air.

Based in 2017, Ms Koigi was impressed to start out Majik Water after experiencing water shortage for the primary time throughout a drought when she was finding out in Nairobi in 2016.

Whereas many visited a close-by river to fetch water for cooking, consuming and washing, Koigi says she couldn’t carry herself to drink the contaminated water.

“It made me realise that you simply take with no consideration water because it’s all the time there.”

She began searching for different water supply concepts and arrange a water filter firm earlier than creating an air-to-water system.

Majik Water works with NGOs and humanitarian organisations, in addition to being bought in shops.

Majik’s largest unit produces 500 litres of water in 24 hours and is put in in colleges and small communities.

Whereas there’s demand for her firm’s system, Ms Koigi doesn’t see it as a everlasting answer.

“Truthfully, I really feel like this isn’t the answer to water shortage,” says Ms Koigi. “It’s a short lived answer… principally as a result of it’s not low-cost.”

Producers are targeted on making air-to-water technology programs extra power environment friendly, says Avinash Singh, affiliate director of analysis and consulting at World Market Insights.

“As an illustration, improvements in compressors, warmth exchangers, and desiccants have improved the power effectivity of such programs.”

He provides that authorities assist, subsidies, or environmental laws might drive additional adoption of the know-how.

One growth which has helped the adoption of such water programs is the transfer to digital funds.

Headquartered in Italy, Veragon has water manufacturing items throughout the Center East, Asia, Africa, and South America.

“After we initially began with off-grid communities, it was a cash-based society which wasn’t actually viable… these days it’s being digitalised,” says Veragon world enterprise director Stephen White.

“For instance, the vast majority of Cambodia is roofed by 4G and Covid noticed an explosion of e-wallets. There’s a lot better personal infrastructure and partnership – the federal government doesn’t must be concerned, and we promote water at a lot lower cost.”

He says all items will likely be moved to digital within the subsequent few months.

Nevertheless, the costs of the items shouldn’t be low-cost. Veragon says its items, which use the cooling and condensing system, price between $60,000 and $70,000.

In the meantime, Ms Koigi says a big unit of theirs prices $18,000.

However Mr Shrivastav factors that making water in situ has a price benefit as water is kind of heavy and never straightforward to move round.

Wanting forward, Uravu Labs is exploring how developments in materials science can enhance the effectivity of desiccants, or how utilising a special materials for absorbing extra moisture from the air might make the method more practical. Mr Shrivastav says these developments may also end in lowering the warmth required from 60C to 40C.

They’re additionally hoping to run pilot tasks involving putting in its items in knowledge centres in India and Singapore.

Knowledge centres generate loads of warmth which is normally misplaced, however Uravu plans to as an alternative to make use of it create recent water.

“This course of will end in as much as 95% discount in recent water consumption [by the datacentre] as Uravu’s system captures many of the waste warmth and offers again chilly water, thus little or no freshwater is required as a top-up,” says Mr Shrivastav.