Glenwood Springs Wastewater Treatment Plant

Location: Glenwood Springs, Colo.

Client: City of Glenwood Springs

Burns & McDonnell has completed several projects at the Glenwood Springs Wastewater Treatment Plant over the past 12 years. Specifically, Burns & McDonnell completed a study of odor control options for the plant. The project included significant field air and water quality monitoring. Based on the field data, three odor control alternatives were investigated, including liquid scrubbing, activated carbon and iron salt addition. A net present worth analysis indicated that iron salt addition was the preferred alternative. The city's operational approach was also evaluated in order to determine if the operations could be modified to minimize odor generation.

Burns & McDonnell also prepared procurement and installation specifications for a new dewatering centrifuge at the Glenwood Springs Wastewater Treatment Plant. The project included a new progressive cavity solids feed pump, grinder, polymer system and dewatered solids conveyance system. The facilities were specified and designed such that the future regional treatment facility can use this equipment thereby minimizing overall project costs.

Burns & McDonnell evaluated and designed the improvements to two anaerobic digesters for the City of Glenwood Springs. The existing primary digester covers, mixing systems and controls were replaced with new fixed-beam covers, internal mixers and heat exchangers and complete control systems. The project also included significant concrete rehabilitation. The improvements significantly improved digester performance (i.e., volatile solids reduction) and reduced the heated water demand historically exhibited by the inefficient mixing systems in the digesters.