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Cold climates present serious difficulties for biological wastewater treatment. Falling temperatures produce lowered biological activity in lagoons, which re- sults in lower BOD removal rates. Total nitrogen removal and ammonia removal rates also decline as air and wat...

In January 2007, the town of Troy, New Hampshire completed a lagoon upgrade designed to meet ammonia nitrogen limits imposed in their reissued NPDES discharge permit. The plant was required to meet a summer limmit of 8.7 mg/l from May 1st through September 30th and a w...

Lemna Environmental Technologies, Inc. (LET) was distinguished for its "groundbreaking water infastructure design" in an American Council of Engineering Companies (ACEC) Magazine article, published in their March/April 2006 issue.

The wastewater treatment plant highligh...

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