Who would have expected a toilet to one day filter water, charge a cellphone or create charcoal to combat climate change? These are lofty ambitions beyond what most of the world’s 2.5 billion people with no access to modern sanitation would expect. Yet, scientists and toilet innovators around the world say these are exactly the sort of goals needed to improve global public health amid challenges such as poverty, water scarcity and urban growth.
Scientists who accepted the Bill & Melinda Gates Foundation’s challenge to reinvent the toilet showcased their inventions in the Indian capital on Saturday. The primary goals: Sanitize waste, use minimal water or electricity and produce a usable product at a low cost.
The World Bank estimates the annual global cost of poor sanitation at US$260 billion, including loss of life, missed work, medical bills and other related factors. India alone accounts for US$54 billion — more than the entire GDP of Kenya or Costa Rica.
India is by far the worst culprit, with more than 640 million people defecating in the open and producing a stunning 65,317.3 tonnes of human waste each day — the equivalent weight of almost 10 Eiffel Towers or 1,800 humpback whales.
Pooping in public is so acceptable that many Indians will do it on sidewalks or in open fields. Gaze out the window of any Indian train and face a line of bare bottoms doing their business on the tracks.
Meanwhile, diarrheal diseases kill 700,000 children every year, most of which could have been prevented with better sanitation.
“In the West, such things are a nuisance, but people don’t lose their lives,” Christopher Elias, president of global development at the Gates Foundation said. “People don’t immediately realize the damage done by infections coming from human waste.”
India has been encouraging rural communities to build toilets and last year launched a US$1.6 billion program to help. However, building sanitation systems in developing countries is not easy. Flush toilets are not always an option. Many poor communities live in water-stressed areas. Others lack links to sewage pipes or treatment plants.
To be successful, the designs being exhibited at Saturday’s Toilet Fair had to go beyond treating urine and feces as undesirable waste to recognize them as profit-generating resources for electricity, fertilizer or fuel, scientists said.
The designs are mostly funded by Gates Foundation grants and in various stages of development, though others not created as part of the Gates challenge were also exhibiting on Saturday.
Some toilets collapsed neatly for easy portability into music festivals, disaster zones or illegal slums. One emptied into pits populated by waste-munching cockroaches and worms.
One Washington-based company, Janicki Industries, designed a power plant that could feed off the waste from a small city to produce 150 kilowatts of electricity, enough to power thousands of homes.
The University of the West of England, Bristol, showcased a urine-powered fuel cell to charge cellphones overnight.
Another team from the University of Colorado, Boulder, brought a system concentrating solar power through fiber optic cables to heat waste to about 300°C. Aside from killing pathogens, the process creates a charcoal-like product called biochar that is useful as cooking fuel or fertilizer.
“At the core are really interesting scientific principles, so translating this into scientific advances that people can relate to is really exciting,” said Karl Linden, a professor of environmental engineering in Boulder and one of the project leaders.
“Biochar is an important subject for scientists at the moment, since it can be used to sequester carbon in the soil for 1,000 years or more,” he added.
A team from Beijing Sunnybreeze Technologies Inc also brought a solar-biochar system, but with the solar panels heating air that will dry sludgy human waste into nuggets that are then heated further under low-oxygen conditions to create biochar.
One company from the southern Indian state of Kerala was not as concerned with providing toilets as with cleaning them.
“There is a stigma. The lowest of the low are the ones who clean the toilets,” Bincy Baby of Eram Scientific Solutions said.
Eram’s solution is an eToilet, coin-operated, with an electronic system that triggers an automated, self-cleaning mechanism. With 450 prototypes now in use across India, electrical engineers are lining up for jobs as toilet technicians.
Chinese President Xi Jinping (習近平) is to visit Russia next month for a summit of the BRICS bloc of developing economies, Chinese Minister of Foreign Affairs Wang Yi (王毅) said on Thursday, a move that comes as Moscow and Beijing seek to counter the West’s global influence. Xi’s visit to Russia would be his second since the Kremlin sent troops into Ukraine in February 2022. China claims to take a neutral position in the conflict, but it has backed the Kremlin’s contentions that Russia’s action was provoked by the West, and it continues to supply key components needed by Moscow for
Japan scrambled fighter jets after Russian aircraft flew around the archipelago for the first time in five years, Tokyo said yesterday. From Thursday morning to afternoon, the Russian Tu-142 aircraft flew from the sea between Japan and South Korea toward the southern Okinawa region, the Japanese Ministry of Defense said in a statement. They then traveled north over the Pacific Ocean and finished their journey off the northern island of Hokkaido, it added. The planes did not enter Japanese airspace, but flew over an area subject to a territorial dispute between Japan and Russia, a ministry official said. “In response, we mobilized Air Self-Defense
CRITICISM: ‘One has to choose the lesser of two evils,’ Pope Francis said, as he criticized Trump’s anti-immigrant policies and Harris’ pro-choice position Pope Francis on Friday accused both former US president Donald Trump and US Vice President Kamala Harris of being “against life” as he returned to Rome from a 12-day tour of the Asia-Pacific region. The 87-year-old pontiff’s comments on the US presidential hopefuls came as he defied health concerns to connect with believers from the jungle of Papua New Guinea to the skyscrapers of Singapore. It was Francis’ longest trip in duration and distance since becoming head of the world’s nearly 1.4 billion Roman Catholics more than 11 years ago. Despite the marathon visit, he held a long and spirited
China would train thousands of foreign law enforcement officers to see the world order “develop in a more fair, reasonable and efficient direction,” its minister for public security has said. “We will [also] send police consultants to countries in need to conduct training to help them quickly and effectively improve their law enforcement capabilities,” Chinese Minister of Public Security Wang Xiaohong (王小洪) told an annual global security forum. Wang made the announcement in the eastern city of Lianyungang on Monday in front of law enforcement representatives from 122 countries, regions and international organizations such as Interpol. The forum is part of ongoing