The City of Winfield drinking water department produces on average 2 MGD of water and has capacity of 6 MGD. The city has about 4,350 residential 715 commercial customers for its water.
The Winfield Water Treatment facility was operational in 1969, coinciding with the completion of the Winfield City Lake. Currently, all water treated by the City of Winfield is supplied by the city lake.
The city maintains around 130 miles of water distribution lines and 7.7 miles of raw water line from the lake to the water plant.
A 2005 water plant upgrade project included the construction of an ozone water treatment facility. Ozonation of water improves both the aesthetics of water in terms of taste, smell and appearance as well as improtant health criteria such a enhanced disinfection and the reduction of disinfection byproducts.
Winfield is a little unusual in that most ozone systems were supplied to much larger water treatment facilities.
During the 64th Annual U.P. Water Treatment System Operator’s Training, which is associated with the American Water Works Association. Manistique competed against 11 other communities in a drinking water taste off. Manistique’s water supply is drawn from the Indian River – something which sets Manistique apart form many of the other communities in the taste competition. It’s very hard for a surface water treatment plant to compete against groundwater systems. Manistique is the first surface water plant to win the competition in the U.P.
Last year the city upgraded it’s water treatment plant to use ozone and granular activated carbon filtration in order to meet new drinking water quality rules making it the first in the U.P. One of the primary uses for ozone water treatment is taste and odor improvement. What makes ozone especially attractive for this application is that it can simultaneously improve water taste while also imrpoving disinfection and removing other water impurities. This is the case in Manistique.
New Jersey American Water has built a new water treatment plant in Short Hills, NJ to meet the standards of the Safe Drinking Water Act including the control of disinfection by-products. The new plant was built alongside two older plants, one that was built in 1929 and the second built in 1958. The 1958 plant remained online during construction.
The new facility cost $78 million to build, which was funded by a grant from the New Jersey Environmental Infrastructure Trust, and created 200 jobs. It can produce 14 million gallons of water a day that meets or exceeds state and federal standards.
The new plant has ozone water treatment and allows New Jersey American Water to comply with the by-products disinfection rule and improves taste and odor for the facility’s customers. Raw water is pumped from the reservoir and ozone gas is added to the raw water as needed. A coagulant is added to the water to remove natural organic matter suspended in the water. After that, the water is mixed is rapid mixed with paddle mixers to form floc and then goes on to the Dissolved Air Flotation basins. Tiny bubbles float the floc to the surface and form a sludge blanket which is removed by using a mechanical scrapper. Once it leaves the DAF basin it enters filters which remove any remaining suspended solids from the water. A disinfectant and corrosion inhibitor are then added before the water leaves the plant to the distribution system.
Boulder’s wastewater treatment plant started up a new $3 million UV disinfection system purify the city’s wastewater. Flows are 12.5 million gallons per day of wastewater. Costs are comparable to the previously used chlorine gas/sulfur dioxide chemicals previously employed, however the safety and environmental aspects of UV are dramtically better than the chemicals.
The UV does not create disinfection byproducts that may be harmful to aquatic life, reduces the carbon footprint of the plant by elimianting the need to transport the chemicals and improves the safety and security of the facility related to the storage and handling of the chlorine and sulfur dioxide. A failure of one of he 2,000 pound storage cylinders could result in an extensive evacuation of people for a couple of miles around the plant. In total, the plant stored upwards of six tons of the toxic chemicals on site at any given time. Hazard response teams were on call in case of any kind of accident.
UV wastewater disinfection has become an important technology. Most new facilities constructed have dopted UV. Different kinds of UV systems exist. Boulder uses a low-pressure, high-output UV system.
Other technologies such as advanced oxidation or combining UV with ozone water treatment or hydrogen peroxide can potentially remove trace organics or small carbon products. Boulder has not considered those technologies yet, but is leaving its options open. UV, ozone and other related technologies are changing the way water and wastewater are treated. These technologies reduce the formation of dangerous byproducts, improve safety and security at the facilities and provide better treatment.