CASE STUDY: Glasgow Wastewater Treatment Plant - Glasgow, MT

CLIENT: Glasgow Wastewater Treatment Plant
Meeting stringent regulatory requirements, especially for Ammonia limits, can be a daunting task for any wastewater treatment system, especially those located in cold climates where nitrification is adversely affected by winter temperatures. Add in the potential cost of a new treatment plant and the expertise required to operated a complicated mechanical system, and many rural communities are faced with difficult and expensive options for meeting their treatment requirements. The City of Glasgow, located in central Montana, was faced with more stringent effluent requirements that included Ammonia limits. With an aging lagoon treatment system that was incapable of meeting those limits, the City turned to LET to engineer a solution.
Lemna Technologies’ unique LemTec™ Biological Treatment Process (LBTP), composed of a series of aerobic treatment cells and followed by a low-loaded settling zone for sludge storage was the answer to the City's problem. The aerobic and anaerobic cells are covered by the LemTec™ Insulated Modular Cover System, a patented floating modular cover, which provides an insulated environment for heat retention and prevents algae growth by shielding sunlight. The warmer environment, along with the other components of the aerobic and anaerobic cells, provides conditions conducive to the removal of biochemical oxygen demand (BOD), total suspended solids (TSS) and ammonia nitrogen (NH-3). The LBTP is capable of delivering exceptional BOD, TSS and Ammonia treatment in a smaller footprint than a traditional lagoon at a lower cost than a traditional package plant. The Lemna Polishing Reactor (LPR) follows the settling cells and provides additional BOD and Ammonia treatment.
The LBTP installed in Glasgow is an effective, reliable, and affordable aerated lagoon based biological treatment process capable of achieving year-round effluent limits as low as 10 mg/l BOD, 10 mg/l TSS and mg/l NH3-N at a fraction of the cost of a mechanical system. With a reduced footprint, a process that is extremely reliable, and simple to operate, the LBTP is the highest performance pond-based package in the world and offers numerous advantages over other systems, including lower capital and operating costs, expandability and low maintenance.


- BOD Removal

- TSS Removal

- Cold Weather Nitrification

- Ammonia Removal: Nitrification

- Total Nitrogen Removal (TN): Denitrification


- LET Biological Treatment Process (LBTP)

- Modular Insulated Cover Technologies

- Aeration Technologies

- Lemna Polishing Reactor (LPR)


- Case Study: Glasgow Wastewater Treatment Plant - Glasgow, MT (PDF)

- LET Overview Brochure

- LemTec Innovative Cover Solutions Brochure

- LemTec Innovative Wastewater Solutions Process Brochure

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