To breathe or not to breathe

Tom Pankratz explains the history and virtues of anaerobic wastewater treatment. It is evolving quickly to compete more with aerobic processes.

Biological wastewater treatment occurs when the organic matter in wastewater is broken down by a variety of microbes and small organisms into gasses and waste products. This can be done aerobically—employing microbes that require oxygen—or anaerobically— employing organisms that live in an oxygen- free environment.

Historically, most domestic wastewater treatment plants...

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