Growing algae in sewage to create biofuels

A channel in which algae is bred and gently stirred with a paddlewheel.

Growing algae on sewage could generate affordable biofuels. To make this work you begin with a series of small artificial rivers where waste water flows and algae is cultured. In those ponds is a paddle wheel, which pushes the water about and mixes algae into the waste water. The shallowness of the rivers encourages sunlight and helps the algae grow. And that algae is pretty important, because it’s what gets turned into biofuel.



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Only half of prescription drugs are removed by wastewater treatment plants

The impact of most of these “chemicals of emerging concern” on the health of people and aquatic life remains unclear.

A new report by the International Joint Commission, a consortium of officials from the United States and Canada who study the Great Lakes has found that only about half of the prescription drugs and other newly emerging contaminants in sewage are removed by treatment plants.



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New York City’s New Plan to Turn Sewage Into Heat


When you consider that New York City disposes of more water as waste than nearly 70% of the countries in Africa (accounting for over 340 million people) consume, you would hope that they’re doing something useful with it. And they have been. With some of it.


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