The wastewater treatment lagoon at Gresham (Wis.) Municipal Utilities needed a $350,000 upgrade to comply with the state Department of Natural Resources’ new ammonia-nitrogen daily maximum limit of 1.8 mg/l. The utilities considered installing a carbon dioxide bubbling system to...
Cold-Water Nitrification
A Bio-Dome mobile ammonia removal system proves itself in testing through a Midwestern winter
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