The aim of these sewage treatment systems has traditionally been to provide clean effluent that can be put back into the ecosystem. So basically, we suck water out of an ecosystem using energy , clean it more energy , pipe it through a city using lots of infrastructure into our homes. Then we flush it down the drain this is where it gets dirty again and pipe it to a waste-water treatment plant more infrastructure often using a lot of energy to put it back into an ecosystem.
What a waste. Municipal waste-water treatment plants are also terrible energy consumers. Many facilities in industrialised regions produce methane , another greenhouse gas that contributes to global warming.
So for all those people who still need access to safe sanitation, we need to consider other types of toilets. Which brings me back to water-based flush toilets and sewage treatment plants. Worldwide, sewage treatment plants take more than four million kilograms of nitrogen and nearly a million kilograms of phosphorus out of wastewater.
The nitrogen goes into the atmosphere as a greenhouse gas. Schools without toilets can cause girls to miss out on their education. Toilets are a great investment. But still, million people worldwide practise open defecation, meaning they go outside — on the side of the road, in bushes or rubbish heaps. In order to get everyone in the world using toilets, we need to triple our current efforts. World Toilet Summit - annual gathering of experts with focused discussions that promote clean toilets, sanitation issues and hygiene.
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