City of Oregon, OH turns to ozone to treat drinking water. \u00a0According to city officials ozone was a better technology for bacteria reduction.<\/p>\n
<\/p>\n
Ozone helps protect the earth\u2019s surface from harmful ultraviolet rays, but Oregon is using it to combat something else.<\/p>\n
In an effort to ensure the safest drinking water possible, the city\u2019s water treatment plant has gone ahead with plans to use ozone to eliminate harmful bacteria, including cyanobacteria that produce microcystin.<\/p>\n
\u201cOzone treatment is really the emerging, best practice to deal with surface water,\u201d Oregon city administrator Michael Beazley said.<\/p>\n
Oregon was not affected by Toledo\u2019s water ban in 2014, but the crisis was an eye-opener, prompting research into this new technology.<\/p>\n
The city\u2019s water intake is in Lake Erie, but it is separate from Toledo\u2019s. When lake water reaches the Oregon\u2019s treatment plant, ozone combines with electricity to break up any organic contaminants in the water into smaller pieces. What\u2019s left goes through biological filtration.\u00a0The system kills algae-related toxins in about eight-tenths of a second.<\/p>\n
\u201cOnce you get ozone added into the treatment, you\u2019re going to eliminate any chance of microcystin getting into the tap water,\u201d said \u00a0Doug Wagner, superintendent of water treatment.\u00a0\u201c[The algae problem] isn\u2019t going to go away, so we\u2019re going to hit it head-on.\u201d<\/p>\n
The plant ran a pilot program from July to November. During the program, crews used the ozonation process to treat four gallons of water per minute, sent it through the contact chamber, and put it in a biological filter.<\/p>\n
\u201cIt was like a microplant,\u201d Mr. Wagner said.\u00a0\u201cWe had four columns that had different filter profiles in each one to put the ozonated water through to see which one would grow the best bacteria that would consume the organics in the water.\u201d<\/p>\n
The new system, which is expected to be in place by the 2017 algae season, should lower the amount of chlorine used in drinking water, officials said. Ozone is a better disinfectant and produces fewer disinfection byproducts, known as trihalomethanes. It also eliminates a higher number of trace organic compounds, officials said.<\/p>\n
\u201cBy reducing the amount of chlorine we use, we end up with water that is safer, more easily treated, has a better taste to it, and end up without some of the by-products you end up with using chlorine treatment,\u201d Mr. Beazley said.<\/p>\n
After the ozone disinfects the water, it turns back into oxygen. All water leaving the plant will be ozone-free.<\/p>\n
The entire project is expected to cost about $14 million, funded mostly by a zero-interest loan of about $750,000 a year for 20 years from the Ohio Environmental Protection Agency\u2019s Water Supply Resolving Loan Account. The city also secured a $1.4 million grant from the Ohio Public Works Commission.<\/p>\n
Oregon\u2019s water rates will increase slightly over a period of time. The average customer will pay about $2 to $3 more a month, city officials said.<\/p>\n
Mr. Beazley said bids for construction submitted in December \u00a0are being reviewed, and a contract should be awarded in the next few weeks.
\nRead more at http:\/\/www.toledoblade.com\/local\/2016\/01\/11\/Oregon-turns-to-ozone-to-treat-its-water.html#oqQ5mUqG7bBgWqit.99<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"
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