Concerns grow over tainted sewage sludge spread on croplands

For more than 20 years, the eastern Michigan town of Lapeer sent leftover sludge from its sewage treatment plant to area farms, supplying them with high-quality, free fertilizer while avoiding the expense of disposal elsewhere.

Antigravity water transport system inspired by trees

Efficiently moving water upward against gravity is a major feat of human engineering, yet one that trees have mastered for hundreds of millions of years. In a new study, researchers have designed a tree-inspired water transport ...

Sewage sludge down on the farm

The phrase "sewage farm" may have fallen from favour and been replaced with terms such as waste water treatment works and the like. But, the origin of that archaic phrase refers very directly to the fact that partly processed ...

Nordic microalgae cleans wastewater and produces biodiesel

Lorenza Ferro demonstrates the potential of Nordic microalgae for simultaneous production of biomass and municipal sewage treatment in our Nordic climate. She has also studied how microalgae and bacteria work together and ...

Can we turn sewage 'sludge' into something valuable?

Over the past few years I have become an academic expert in "sewage sludge" – the residual, semi-solid mix of excrement packed with microorganisms that is left behind within wastewater treatment plants. Every year the UK ...

Sewers could help clean the atmosphere

Sewage treatment—an unglamorous backbone of urban living—could offer a cost-effective way to combat climate change by flushing greenhouse gases from the atmosphere.

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