Wastewater treatment plants are revamping themselves as resource recovery operations, saving—and even producing—energy and
polluting less in the process.
Anammox bacteria, which convert ammonia into nitrogen gas in the absence of oxygen, could dramatically improve methods of
removing ammonia from wastewater streams.
Carbon dioxide may be the ultimate industrial waste product. Could tropical corals provide a trick for locking it away in
The aversion to excrement, which is deeply rooted in the human psyche, gets in the way of sensible solutions to recycling