In a League of its Own   Water & Wastes Digest July 2005   07/05/05
The design and aesthetic features of the plant are what overcame any NIMBY objections,” Nespeca said.

Waveguide Solves Digester Level Monitoring Dilemma   Water & Wastes Digest March 2003
The level in an anaerobic digester is a critical measurement. If the top foam level gets too high, it can enter the gas collection pipeline and lead to costly maintenance. The city of Orillia, located north of Toronto, Canada, has found a reliable level measurement system for the two anaerobic digesters at its wastewater treatment center.