Treatment for the wastewater produced by power plant flue gas desulphurization (FGD) systems (also known as scrubbers) is essential because scrubbers generate substantial amounts of effluent that must be retained and treated before it can be released to streams, lakes or rivers. Selenium is one pollutant that is collected in scrubbers. And because selenium is both in the scrubber wastewater as well as having restrictive water quality standards, it has to be treated prior to discharge to protect waterways.
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