| Related Searches from WaterInfoLink.com |
Reverse Osmosis | Chlorides | Layne Christensen | Volatile Organic Compounds
Located 39 miles northwest of Wichita, the city of Hutchinson, Kan., has a population of more than 40,000. The public water supply is derived from groundwater through 20 municipal wells, most of which have been installed and maintained by Layne Christensen Co.
The city discovered that carbon tetrachloride and other volatile organic compounds (VOCs) had contaminated one of its well sites. Additionally, high levels of inorganic chlorides (salts) were present.
VOCs are typically treated by air stripping; however, this strategy was complicated by the chlorides, which cannot be removed through air-stripping processes.
Professional Engineering Consultants was brought in to devise a treatment strategy. The facility treats water from the contaminated well, removing iron and manganese with manganese dioxide pressure filters, removing chlorides through reverse osmosis (RO) , then removing remaining CO2 and VOCs in a degasifier concealed in the clock tower. The resulting pure water is then blended with city water, resulting in a peak production capability of 10 million gal per day (mgd).
In June 2007, Layne Christensen Co. was awarded a contract from the general contractor, Walters Morgan Construction, to assist in the design and fabrication of an RO system with a peak capacity of 6 mgd. The contract included 5-micron cartridge filters, clean-in-place equipment and chemical feed equipment for the membranes.
The RO system was completed in April 2009. The city of Hutchinson now has significantly cleaner and softer water and is recovering water that would otherwise be unusable.