By TechIsrael Staff
Photo by Sustainable sanitation
It may look like mud, but sludge – the “leftover” semi-solid part of the stuff we flush down the toilet or pour down the drain, is a creature unto itself. Far more toxic than plain old mud, sludge has the potential to bust a city's budget, as it needs to be treated and disposed of. But it doesn't have to be that way; in the hands of Israeli startup Global Recycling Projects Ltd. (Ecoarrow), sludge pulls its own weight – providing “free” energy by turning sludge into ...
