Two Birds, One Stone

A North Carolina plant team’s innovations include simultaneous nitrification-denitrification to meet upcoming phosphorus and nitrogen removal mandates.
Two Birds, One Stone
Tony Bowes, left, and Dennis Hodge check the s::can equipment which analyzes ammonia, nitrates, total suspended solids, pH and temperature.

Faced with a future mandate to limit phosphorus and nitrogen discharged to Jordan Lake, the City of Mebane (N.C.) expected to upgrade its activated sludge plant to a biological nutrient removal system.

Interestingly though, effluent ammonia levels were below 1.0 mg/L even...

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