The Southern Delivery System (SDS) has broken ground on a $125 million facility to treat the “raw” water that will be pumped from the Pueblo Reservoir to Colorado Springs. The SDS water treatment plant, which is being built on 124 acres east of Marksheffel Road between U.S. 24 and Colorado Highway 94, will consist of seven buildings, water storage tanks, drying beds, lagoons, pump stations and a drainage pond. It will be able to treat 50 million gallons of water per day.
SDS is expected to be operational in early 2016, and it could take nearly that long to complete the water treatment plant. The 82,000 square-foot water treatment plant will use ozone biological filtration to treat water piped from the Pueblo Reservoir. The plant’s capacity can be expanded to treat up to 130 million gallons of water per day based on future demand.
Ozone biolfiltration is an effective method for removing naturally occurring organic materials from water. It has been used extensively in the US for various surface water sources.
The Portland Water District (Maine) announced an upgrade to the Sebago Lake Water Treatment Facility with the addition of ultraviolet (UV) disinfection unit at the district’s facility in Standish. It is part of a $12.8 million project. When it becomes fully operational in 2014, the district’s UV water treatment system will be the second-largest in New England, behind the Massachusetts Water Resources Authority’s in Boston.
The process sends water through a reactor that is equipped with ultraviolet lamps. As water is exposed to the light, the light penetrates micro-organisms damaging their DNA so they can not reproduce and thus stoping the life cycle of the organism.
The improved disinfection system was mandated by the federal government. The U.S. Environmental Protection Agency (EPA) requires surface water treatment facilities to improve drinking water quality and provide additional protection from disease-causing micro-organisms and contaminants. To meet EPA standards, the district must operate two disinfection systems — its current ozone water treatment system and the new UV system. While EPA considers UV technology to be the most effective against cryptosporidium and giardia, they also promote multiple barriers for treating water. This means using two to three methods of disinfection in case any one of the systems fail.
The U.S. Centers for Disease Control and Prevention say cryptosporidium is a microscopic parasite that can cause diarrhea. Resistant to chlorine treatments, it is one of the most common causes of waterborne disease in humans.
Discharges from Eden Valley were causing odor problems with the Berwick wastewater treatment plant. Effluent from the Eden Valley overwhelmed the sewer treatment system, causing bad odors throughout the northeast quadrant of berwick. Upgrades were made to the system to ensure there would be no repeat of the problem.
When Eden Valley purchased the former Larsen facility that same year, Berwick partnered with the provincial and federal governments and Eden Valley to upgrade the facility again, this time to the tune of $2 million. The project was pursued to improve efficiency at the treatment facility and to avoid a repeat of the odor issues.
One of the improvements made was teh addition of an ozone injection system, the first of its kind installed in Nova Scotia. It is designed to destroy organic compounds and suspended solids before water is pumped into the Cornwallis River.
Ozone odor control has been used extensively in the US and Europe at a variety of facilities including wastewater treatment plants. This has been done by mixing ozone with the off gas from the wastewater treatment plant using a wet scrubber or treating the water to prevent the smell in the first place.
A European project is helping to improve the efficiency and safety of ozone use in the management of water quality in aquaculture. Ozone is a great tool for the removal of fine particles and dissolved organics in fish tanks when used with a Recirculation Aquaculture Systems (RAS).
Research shows that using ozone for water treatment with an RAS improves productivity – fish are healthier and survival rates increase. Designing a high performance ozone system optimised for specific site conditions requires expertise.
Ozone has seen wide use in aquaculture because it has a rapid reaction rate, produces few harmful reaction by-products in freshwater and oxygen is produced as a reaction end-product. Ozone is an extremely reactive oxidant and a very effective bactericide and viricide. Ozone can also be used to achieve water quality improvements by micro flocculating fine particulate matter (making particles that are easier to settle or filter) and oxidizing non biodegradable organic molecules (creating smaller and more biodegradable molecules), nitrite, and refractory organic molecules (reducing water color).
Application of ozone to aquaculture requires ozone generation, ozone transfer into solution, contact time for ozone to react and disinfect, and possibly ozone destruction to ensure that no ozone residual makes it into the culture tanks The lack of knowledge and user friendliness of ozone and ozone dissolution systems has been a major issue for many fish farms in Europe. This is why Europe’s RAZone project was initiated. Its aim is to find an ozone dissolution system for the industry that is both effective and efficient. The project was initiated by the Norwegian company, Normex AS, and the research work of the project is funded by the European Union’s FP7 and managed by the Research Executive Agency (REA) and will run up until the end of 2014.
The City of Santa Rosa conducted a pilot rebate program for hotes and commercial laundry facilities to use ozone. It was part of a larger state wide program determine the amount of energy consumed by various water using applications. Specifically the program tried to quantify the water and energy savings assocaited with ozone laundries versus conventional approaches. The study focused on hotel laundries. Ozone allows for laundries to achieve equal cleaning, but with cold versus hot water.
At the sites studied, hot water use at the facilities decline 98%. This reduced energy consumption, specifically natural gas, used to heat the water. The average savings was 10,247 therms/year directly by saving hot water. Natural Gas is usually measured by volume, cubic feet. A cubic foot of gas is the amount of gas needed to fill a volume of one cubic foot under set conditions of pressure and temperature. To measure larger amounts of natural gas, a “therm” is used to denote 100 cubic feet.
The use of ozone also allowed the average hotel to save 911,000 gallons of water per year and this in turn was assocaited with a further energy savings of 7,190 kwh/year. All of these savings resulted in a total reduction in utility costs of $13,000/year on average at the time of the study.
The city offers rebates to encourage the use of energy and water saving technology. They have found that saving water is cheaper than trying to develop new water sources for the city. the payback periods on teh rebates cna range from a few months to two years. In general, a very good investment.