ENERGY EVALUATION OF A POTABLE WATER TREATMENT PLANT USING DISOLVED AIR FLOTATION

摘要

The Root Reservoir Treatment Plant in the Town of Lenox, Massachusetts is capable of treating 1.6 mgd using a dissolved air flotation with filtration (DAFF) technology designed by Krofta Engineering Corporation. The treatment operation is divided into four areas for discussion; the clarifier operation, the backwash cycle, HVAC systems, and lighting systems. In 1998, the clarifier used $36,241 in electricity costs that represented 93% of the total facility consumption. The backwash cycle uses $1,591 in electricity costs that represent 4% of the total facility consumption. The HVAC system uses $924 in electricity costs that represent 2% of the total facility consumption. While the lighting system uses $381 in electricity costs, that represents 1% of the total facility consumption. In 1998, the Root Reservoir Treatment Plant used 501,142 kilowatts of electricity that cost $39,059. The Town of Lenox was charged $0.0793128 per kWh in 1998. It produced 259.2 MG of finished water for a town of 5,600 people who are charged $3.00 per 1000 gallons that each household consumes. Energy conservation measures were recommended that would provide cost savings of $7,053 that would reduce the operation costs by 18.1%. The current production cost is $0.1507 per 1000 gallons of finished water produced. If the all of the estimated benefits of the conservation recommendations were followed and implemented, the potential production cost would be $0.1235 per 1000 gallons produced.