It can be argued that drinking water is the most important sustenance that humans need. Its preparation requires complex processes. To oxidize and disinfect drinking water in the course of treatment, ozone is often mixed in. Because of its high reactivity, ozone must be produced and added on-site under strict safety regulations. With that in mind, VEGA’s pressure transducers make an important contribution to the continuous processing of top-quality drinking water.
The water supply system in Baden-Württemberg is one of the largest and most traditionally far-reaching water supplies in Germany. Around 250 cities and municipalities are supplied with about 90 million cubic meters of drinking water every year. The quality of water, and a high level of security of supply take center stage in the regional water supply’s management.
At the beginning of the 20th century, the population in the central Neckar region was already growing rapidly as industrialization progressed. An extraordinarily far-sighted plan at the time was to bring drinking water from the Danube Valley at the city of Ulm in the Remstal region, to Stuttgart. This laid the foundation for the regional water supply system. Plant for the conversion of river water to drinking water consists of a raw water pump, which draws the water directly from the river, a pressure pipe from the pumping station to the waterworks, and the treatment facilities in the waterworks.
In peak times, up to 2,300 liters of river water per second can be converted into drinking water. The injection of highly active oxygen (ozone) for oxidation and disinfection during drinking water treatment represents state-of-the-art technology. Ozone oxidizes dissolved and particulate organic matter and kills or inactivates existing microorganisms. Ozone is always formed when some type of energy decomposes molecular oxygen into individual oxygen atoms, which then react with molecular oxygen to form ozone. This can occur through UV radiation, lightning strikes and also high-voltage electrical discharges.
Because of its high reactivity, ozone is produced, transported and added to the water on the spot and in compliance with strict safety regulations. The actual production process takes place in pressurized reactors, where electrical energy is applied to convert oxygen into ozone. Then, the resulting gas mixture flows into an ozone collecting pipe. The maximum ozone concentration is about 180 g/Nm³ at an operating pressure of 1.3 bar. Injectors feed the ozone into the water, while mixers distribute the tiny ozone bubbles evenly throughout the water volume. For a few minutes, the water remains in large containers during which time oxidation and disinfection take place.
To ensure that pressure measurement in the ozone collection pipe and at other important measuring points is safe and reliable, the engineering department decided to use VEGAbar 82, the pressure transmitter with ceramic Certec measuring cell and a second line of defense. This is an additional process separation by means of a gas-tight feedthrough above the process connection. Although the measuring cell is permanently resistant to ozone, the second line of defense provides an extra layer of protection against the leakage of ozone from the pipeline through the pressure transmitter.
VEGAbar 82, therefore, plays an important role in safe ozone generation, as well as in the continuous production of top-quality drinking water.
I have not seen this pen myself, and certainly have no valid test data, therefore I cannot testify to the effectiveness to actually produce sufficient ozone to purify water. However, this is a fascinating product and proves the use of ozone for water treatment continues to become more mainstream.
The concept of using ozone to treat drinking water isn’t a new one, dating back to the late 1800s. The US EPA’s Drinking Water Treatability Database identifies ozone as “one of the strongest disinfectants and oxidants available in drinking water treatment,” and the US Food and Drug Administration recognizes ozone’s use for both water and food.
Ozone has tended to be used for larger applications, such as municipal drinking water systems and household purification. Roving Blue specializes in portable systems, including the MVP-A carry case kit and the all-new O-Pen, possibly the most portable ozone-based purifier out there. The Wisconsin-based company says the stainless steel pen is TSA-approved and markets it at world travellers, hikers and outdoor enthusiasts.
The O-Pen weighs just over an ounce (30 g) and purifies 16 oz (0.5L) of water in less than a minute. You simply drop the tip into the water, turn it on and let it do its thing. It bubbles while in use, providing a visual cue that clean water is on the way. In addition to taking care of all sizes of dangerous microorganisms, from tiny viruses to larger bacteria and protozoa, the O-Pen removes unpleasant tastes and odors, leaving a clean, fresh taste, one of the advantages that ozone offers over other treatment options, such as chlorine.
While there are many ozone generators on the market that are small, low cost, and compact. This Ozone pen appears to be a very portable device that could work anywhere. This is certainly worth a look.
The use of ozone to treat water is not new. Ozone is used for treating drinking water, wastewater, and provide water re-use. The use of ozone is not well known. As the use of ozone gets in the hand of more consumers the use of ozone will become more accepted in more industrial applications also.
Tyler Water Utilities (TWU) has made several process changes to improve its water quality since November, including increasing the use of ozone, enhanced coagulation and the addition of sodium hydroxide in the water treatment process.
The increased utilization of ozone at the Lake Palestine Water Treatment Plant was a recommendation from Enprotec/Hibbs &Todd, Inc. (eHT) who was hired by the Mayor and City Manager to evaluate Tyler Water Utility’s processes. Ozone is used to reduce precursor organics related to the formation of problematic disinfection byproducts. Additionally, it has improved water quality by reducing taste and odor-related complaints.
“TWU continues to research ways to reduce disinfection byproducts and improve water quality by utilizing ozone,” said Environmental Compliance Engineer Clayton Nicolardi. “The City is working with the TCEQ to identify alternative treatment strategies that rely more on the use of ozone for disinfection credit allowing for the reduction of disinfectants related to the formation of byproducts such as haloacetic acids and trihalomethanes.”
The second treatment strategy implemented is enhanced coagulation. This process, like ozone, is utilized to enhance the removal of precursor organics prior to the addition of disinfectants often associated with the production of regulated byproducts. The results thus far have been promising.
The third change made by the Utilities Department was the addition of sodium hydroxide feeding capabilities at the Lake Palestine Water Treatment Plant in November of last year. Sodium hydroxide is used primarily to improve water stability by increasing the pH and alkalinity of drinking water, thus reducing the potential for corrosivity which can lead to increased levels of lead and copper.
“This change has shown significant improvement as documented by the recent test results collected at five sampling locations that exceeded the action limit for lead and cooper last September,” said City Manager Ed Broussard. “In the most recent sampling conducted this week, Tyler is in compliance with standards set by the Texas Commission on Environmental Quality for Lead and Copper.”
In response to these positive results at the Lake Palestine Water Treatment Plant, TWU began the process of implementing the same treatment strategy at its Golden Road Water Treatment Plant. Due to the age of the plant, certain modifications had to be completed prior to implementing the use of sodium hydroxide. This week, operators and crews are working on the last phase with the installation of the necessary feeding equipment.
“TWU strives to give the City of Tyler the best drinking water possible,” said Environmental Compliance Engineer Clayton Nicolardi. “After reviewing processes and documenting test results in the spring of last year, TWU became aware of opportunities to enhance its water quality. We began the process of getting approval through the TCEQ. The TCEQ was very helpful in expediting the approval process allowing TWU to begin implementing changes in November of last year. Significant improvements have been documented since.”
The most recent test results for the current quarter for haleocetic acids show that all sampling locations fell below the maximum limit permitted. Because the TCEQ requires notification of residents based upon a four quarter average, Tyler will need to continue to notify customers until the peak month last spring rolls off.
“I am very pleased with the progress that is being made thus far,” said Tyler Mayor Martin Heines. “By implementing many of the suggestions from the third party review, we have seen our water quality improved. This does not mean that we are done. We have a lot of work to do to ensure we are maintaining our infrastructure in a way that we can be proud of and that will continue to be a priority for term as Mayor.”
TWU is currently working with the TCEQ in organizing a more robust sampling protocol which includes approximately 300 sampling events for 2016 for lead and copper levels. These samples will be targeted at the customers’ tap as well as surface water and ground water sources. Residential sampling sites are selected based on year of construction and the potential that they may have plumbing materials containing lead and copper.
Doug Wagner, superintendent of water treatment, emphasized the effectiveness of ozone for fending off algae toxins.
“Once you get ozone added into the treatment, you’re going to eliminate any chance of microcystin getting into the tap water,” he said, per the report. “[The algae problem] isn’t going to go away, so we’re going to hit it head-on.”
Oregon came to these conclusions after a good bit of research. The plant ran a pilot program for five months last year, treating four gallons of water per minute with ozonation. The pilot project included a contact chamber and a biological filter.
“It was like a microplant,” Wagner said, per the report. “We 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.”
Officials say the new system will reduce chlorine levels in the drinking water. They should have the new processes in place in 2017. Officials argued that ozone produces fewer disinfection byproducts, known as trihalomethanes. TheEPA notes that ozoneis one of the strongest disinfectants available for drinking water treatment.
Oregon officials were spurred to action by Toledo’s algae crisis two years ago, when around 400,000 residents were unable to use their water for over two days due to toxic algae contamination, according toCNN.Oregon was not part of the Toledo ban, but it also draws water from Lake Erie.
“The city’s water intake is in Lake Erie, but it is separate from Toledo’s. When lake water reaches the Oregon’s treatment plant, ozone combines with electricity to break up any organic contaminants in the water into smaller pieces. What’s left goes through biological filtration. The system kills algae-related toxins in about eight-tenths of a second,”TheBladereported.
City of Oregon, OH turns to ozone to treat drinking water. According to city officials ozone was a better technology for bacteria reduction.
Ozone helps protect the earth’s surface from harmful ultraviolet rays, but Oregon is using it to combat something else.
In an effort to ensure the safest drinking water possible, the city’s water treatment plant has gone ahead with plans to use ozone to eliminate harmful bacteria, including cyanobacteria that produce microcystin.
“Ozone treatment is really the emerging, best practice to deal with surface water,” Oregon city administrator Michael Beazley said.
Oregon was not affected by Toledo’s water ban in 2014, but the crisis was an eye-opener, prompting research into this new technology.
The city’s water intake is in Lake Erie, but it is separate from Toledo’s. When lake water reaches the Oregon’s treatment plant, ozone combines with electricity to break up any organic contaminants in the water into smaller pieces. What’s left goes through biological filtration. The system kills algae-related toxins in about eight-tenths of a second.
“Once you get ozone added into the treatment, you’re going to eliminate any chance of microcystin getting into the tap water,” said Doug Wagner, superintendent of water treatment. “[The algae problem] isn’t going to go away, so we’re going to hit it head-on.”
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.
“It was like a microplant,” Mr. Wagner said. “We 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.”
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.
“By 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,” Mr. Beazley said.
After the ozone disinfects the water, it turns back into oxygen. All water leaving the plant will be ozone-free.
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’s Water Supply Resolving Loan Account. The city also secured a $1.4 million grant from the Ohio Public Works Commission.
Oregon’s 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.
Mr. Beazley said bids for construction submitted in December are being reviewed, and a contract should be awarded in the next few weeks.
Read more at http://www.toledoblade.com/local/2016/01/11/Oregon-turns-to-ozone-to-treat-its-water.html#oqQ5mUqG7bBgWqit.99
OREM, UTAH (ABC 4 UTAH) – In Utah, water is big business. Especially when it comes to processing it. For 11 straight years the Central Utah Water Conservancy District has been recognized as being one of the leading plants in its industry.
According to the Partnership for Safe Water the water processed at the CUWCD is the best in the nation.
David Pitcher the Assistant General Manager said, “This process improvement project has made it so that we can provide reliable water that could come out of the tap that most people take for granted.”
The water from Mother Earth and Old Man Winter goes through a series of processes including conventional sedimentation.
“It has been steered in multiple stages decreasing energy that would allow it to develop a particle that will settle out,” said Lead Operator Joe Huish.
American Water Works Association acknowledged the great tasting water by making it the best in the Intermountain Section Conference, which includes Utah and parts of Idaho.
“We have given ourselves all the tools that there are pretty much to drink the water,” said Huish.
The plant that produces the best water in the state was renamed after the man who took time to teach each one of his employees one thing Huish said, “No complacency ever is our main rule.”
Thursday, the plant was renamed the Don A. Christiansen Regional Water Treatment Plant.
Gene Shawcroft the plants general manager said, “It has received a number of awards that other plants are striving to achieve and that recognizes and symbolizes to us the effort Don made over a career, to make sure we had sufficient water, to make sure we had safe drinking water.”
Some bosses at the plant say none of this could be possible without their employees.
“We are very blessed to have workers, operators who their main objective is to provide safe reliable water that is public health,” said Pitcher.
CUWCD will head to Chicago to participate in the American Water Works Association National Conference water taste testing. The contest will be held in June of 2016.
As infrastructure ages and water quality decreases the cost to provide safe drinking water in the USA has increased. The article below, illustrates various issues that municipal water plants are experiencing to delivery high quality, safe, and reliable drinking water to the customers.
TOLEDO, Ohio (AP) — Standing at the edge of the Great Lakes, the world’s largest surface source of fresh water, this city of 280,000 seems immune from the water-supply problems that bedevil other parts of the country. But even here, the promise of an endless tap can be a mirage.
Algae blooms in Lake Erie, fed by agriculture runoff and overflowing sewers, have become so toxic that they shut down Toledo’s water system in 2014 for two days. The city is considering spending millions of dollars to avoid a repeat.
Similar concerns about water quality are playing out elsewhere. Farm fertilizers, discarded pharmaceuticals, industrial chemicals and even saltwater from rising oceans are seeping into many of the aquifers, reservoirs and rivers that supply Americans with drinking water.
Combating these growing threats means cities and towns must tap new water sources, upgrade aging treatment plants and install miles of pipeline, at tremendous cost.
Consider tiny Pretty Prairie, Kansas, less than an hour’s drive west of Wichita, where the water tower and cast-iron pipes need to be replaced and state regulators are calling for a new treatment plant to remove nitrates from farm fertilizers. The fixes could cost the town’s 310 water customers $15,000 each.
Emily Webb never gave a second thought to the town’s water until she became pregnant almost two years ago. That’s when she learned through a notice in the mail that the water could cause what’s known as “blue baby” syndrome, which interferes with the blood’s ability to carry oxygen.
“It just kind of scared me,” she said. “Now we don’t drink it at all.”
Instead, she and her husband stock up on well water from her parents’ home and buy bottled water even though health officials say the risk is limited to infants. When it comes time to buy their first home, she said, they will look somewhere else.
Pretty Prairie’s leaders hope to find a less expensive solution. They say the cost of a new treatment plant would drive people away and threaten the farm town’s survival.
Across the country, small towns and big cities alike are debating how much they can afford to spend to make contaminated water fit for drinking.
Cash-strapped cities worry that an unfair share of the costs are being pushed onto poor residents. Rural water systems say they can’t expect the few people they serve to pay for multimillion-dollar projects.
The U.S Conference of Mayors, in a report released this summer, found spending by local governments on all water-supply projects nearly doubled to $19 billion between 2000 and 2012. Despite a slowdown in recent years, it remained at an all-time high, the report said.
“We have a real dilemma on our hands,” said Richard Anderson, author of the report. “We know we need to increase spending on water, but many houses can’t afford it, and Congress won’t increase funding.”
In California’s Central Valley, low-income farming communities have gone without clean water for years because they don’t have money to build plants to remove uranium, arsenic and nitrates. Drinking fountains at schools have been put off limits, and families spend a large share of their income on bottled water.
A study released in June by the U.S. Geological Survey found nearly one-fifth of the groundwater used for public drinking systems in California contained excessive levels of potentially toxic contaminants.
Compounding the problem is the drought. Because farmers are using more groundwater for irrigation, contaminants are becoming more concentrated in the aquifers and seeping into new wells.
The drought has pushed Los Angeles to plan for the nation’s largest groundwater cleanup project, a $600 million plan to filter groundwater contaminated with toxic chemicals left over from the aerospace and defense industry. Some of the water will be drawn from polluted wells abandoned 30 years ago.
In the Midwest, where shortages typically have not been a concern, more attention is being paid to farming’s effect on drinking water supplies.
Minnesota’s governor this year ordered farmers to plant vegetation instead of crops along rivers, streams and ditches to filter runoff. The water utility in Des Moines, Iowa’s largest city, is suing three rural counties to force tighter regulations on farm discharges.
And in the wake of Toledo’s water crisis, Ohio has put limits on when and where farmers can spread fertilizer and manure on fields.
“But no one really knows how well that works,” said Chuck Campbell, the city’s water treatment supervisor.
Given that, the city has spent $5 million in the past year to bolster its ability to cleanse water drawn from Lake Erie. It is planning a renovation that could approach $350 million and include a system that uses ozone gas to destroy toxins produced by the algae. A 56 percent water rate increase is footing most of the bill.
In many coastal areas, rising seas mean saltwater can intrude into underground aquifers and in some cases ruin existing municipal wells. It’s especially problematic in the Southeast, from Hilton Head Island in South Carolina to Florida’s seaside towns near Miami.
“Nature’s calling the shots and we’re reacting,” said Keith London, a city commissioner in Hallandale Beach, Florida, where six of eight freshwater wells are no longer usable.
The city is considering relocating wells, upgrading its treatment plant or buying water from a neighboring town.
The water that comes out of the tap in the oceanside town of Edisto Beach, South Carolina, is so salty that it corrodes dishwashers and washing machines within just a few years, resident Tommy Mann said.
While technically safe to drink, it tastes so bad that the town gives away up to five gallons of purified water a day to residents and vacationers.
Voters narrowly rejected a proposal two years ago that would have doubled water rates to pay for an $8.5 million reverse-osmosis filtering system.
Said Mann: “We’re living in a beautiful little town with Third World water.”
City of Clarksville Installs BlueInGreen’s Innovative Ozone Technology
BlueInGreen’s HyDOZ system to provide groundbreaking ozone treatment and industry-leading disinfection at Clarksville Water Treatment Plant
FAYETTEVILLE, Ark. (PRWEB) September 15, 2015
Officials at BlueInGreen, LLC announced the installation of the water treatment company’s innovative HyDOZ® system Tuesday, bringing the world’s most efficient gas dissolution technology to the City of Clarksville, Ark.
The HyDOZ will directly inject dissolved ozone into the city’s water supply, treating up to 24 million gallons per day. By using less water, power and chemicals than conventional systems, the HyDOZ will provide more effective water treatment at a fraction of the cost.
The recent plant expansion project will prepare the city’s water infrastructure to meet the needs of Clarksville’s growing population in the future. By reducing both short and long-term operational costs, the HyDOZ is projected to save the city money for many years to come.
“After researching water treatment options, the HyDOZ stood out as the most convenient and cost-effective solution for the city, as well as our operators,” said Plant Manager Roy Young. “Ultimately, this project was designed with Clarksville’s future in mind. And with BlueInGreen, we truly have access to the next generation of water treatment technology.”
In addition to reducing operational costs, the HyDOZ also allows operators at the Clarksville Water Treatment Plant to remotely control the facility’s ozone levels, either manually or automatically. Using the HyDOZ system’s wireless capability, operators are now able to monitor and manage the water treatment process from their laptops, phones and tablets.
“Because we have a relatively small staff, we need a technology capable of working even when we’re not there,” Young said. “With the HyDOZ, I can leave the plant, check it from another worksite and know that it’s getting the job done. I love it.”
Since 2004, the Arkansas-based water treatment company has expanded its award-winning core technology into four product lines: the SDOX® – for adaptable aeration, the CDOX® – for precise pH adjustment and the SDOX-CS® – for optimized odor control. The HyDOZ – for dependable disinfection – is BlueInGreen’s most recent solution to hit the market.
With sales representation throughout the United States and Canada, BlueInGreen and its oxygen, carbon dioxide and ozone dissolution systems have been selected, installed and praised by engineers and operators across the country.
“We couldn’t be happier that another local municipality has opted to implement our technology,” said BlueInGreen President John Kucharik. “But as our installation list shows, BlueInGreen’s technology isn’t just the best in Arkansas. It’s the best in the world.”
Ozone use for drinking water in large municipal water treatment plants has become very popular in recent years. While ozone use may benefit all drinking water plants, most engineering firms and manufacturers have not targeted small to mid-sized WTP’s. This is unfortunate and should be reviewed and considered the next growth potential for ozone implementation in Water Treatment.
Why use ozone for drinking water?
Ozone saves money
Chemical costs are rising, ozone replaces chemical usage, lowers chemical demand
Ozone costs remain fairly constant as technology improves
Primary cost of operating ozone system is electrical power and system maintenance
Better quality water
Ozone leaves no residual in water
Ozone lowers the use of chlorine, and improves overall water quality
Lower, or eliminates DBP’s
Ozone is a more powerful disinfectant – can provide complete eliminates of Cryptosporidium, Giardia and other chlorine resistant organisms
Ozone can oxidize EDC’s and emerging contaminates
Green! – Ozone is a green technology
Municipal Drinking Water plants using ozone – past and future
First ozone use in drinking water in the USA was in 1940
Whiting, Indiana drinking water plant used ozone for taste and odor control (Rice, 1999)
As of 2013, at least 277 WTP’s operating in the USA utilize ozone
This data only includes plants larger than 1 MGD capacity, no data is held on smaller plants
These plants have a combined capacity of 14.5 billion gallons per day with ozone production greater than 600,000 lb/day
Since 1983 at least 55 of these plants have been upgraded, using ozone at least once. Indicating ozone use was favored over other technolgoies by all parties.
Most ozone use for municipal water is in large water treatment plants.
Of the 277 WTP’s of record less than 30 are plants with a capacity less than 2 MGD
The median WTP implementing ozone has grown from 5 MGD capacity a the end of 1984 to 80 MGD at the end of 2020 (projected)
Growth potential of ozone use in the USA
The future of ozone for WTP’s in the USA is great
The EPA estimates there are over 150,000 municipal WTP’s in the USA
Only about ~300 WTP’s are using, or are planning on using ozone
Opportunity for Ozone use in WTP’s in the USA is untapped
Small to Medium sized WTP’s growth potential is greatest
Most of the WTP’s using ozone are large, or very large
The Largest WTP’s are targeted most for ozone implementation, and the majority of ozone implementation is in large WTP’s
There are many small to medium WTP’s that could use ozone but are not targeted by the traditional ozone industry
Drinking water plants the USA by population served
97% of the water treatment systems in the U.S. can be considered small to mid-size (less than 10,000 customers served). The growth potential for ozone use in small and medium sized WTP’s is tremendous.
WTP’s started in 10 year spans shown by capacity
Average size of WTP has grown
Over time, emphasis on small and medium WTP’s has diminished
WTP’s started in 10 year spans shown by ozone production
Average size of WTP and ozone systems has grown
Over time, emphasis on small and medium WTP’s has diminished
Where and why is ozone implemented?
Ozone is used in 42 of the 50 states in the USA
Ozone is used all over the USA, for a variety of applications
Ozone use follows population trends, CA, and TX are the two largest users of ozone
Ozone is used to replace traditional oxidants
Disinfection (Giardia & viruses)
Taste and odor control
Reduction of chlorinated DBP’s
Removal of color
Sulfide oxidation, TOC reduction, Iron and Manganese oxidation
Enhance coagulation processes
Other = Hydrogen sulfide oxidation, Oxidation of unnamed materials, enhancing coagulation, iron and/or manganese oxidation, TOC, and “other”
Ozone use for municipal WTP’s is diverse, and continues to be diverse in the future
Only ozone use for disinfection has grown consistently in each decade
Ozone use for “other” has also grown over time, however this is a large group of uses for ozone in one category
Implementing ozone in small and mid-sized water treatment plants can be cost effective and simple. See image below for an example of ozone contact tank and filtration system.
Case Study – Lewisville, Indiana
400 GPM WTP – Groundwater from 2 wells
High Levels of Iron and Manganese in water
Ozone implemeted for primary disinfection and iron & manganese oxidation
Plant before ozone
Chlorine used for disinfection, and iron & manganese oxidation
Chlorine use was excessive causing other issues
Plant exceeded TTHM limit due to excessive chlorine usage
Customer complaints about taste and odor were received weekly
Plant after ozone
Customer complaints decreased 95%
TTHM and HAA5 levels fell to zero
Chlorine dose reduced from 5 lbs per 35,000 gallons to less than 0.5 lbs per 35,000 gallons
Filter back-washes reduced, decreasing sewage costs by almost 90%
Case Study – Tate Monroe Water Association
4 MPD WTP – Groundwater from 11 wells
High Levels of Manganese in water
Ozone implemeted for primary disinfection and manganese oxidation
Plant before ozone
Permanganate feed was used for manganese removal
TTHM levels were high
Plant operation was inconsistent
Plant after ozone
Total project cost was less than $1 million
Iron and Manganese levels dropped to near zero
Chlorine is more stable and free chlorine lasts longer in distribution system
TTHM levels have been cut in half and continue to drop
Chlorine use dropped dramatically
Ozone can be a great addition to many WTP’s in the USA
Growth potential of the ozone market is great
Ozone can save costs, while improving water quality
In the future, ozone may be the only option for reducing EDC’s
Ozone has long been used to treat drinking water on large and small scale applications. As the technology becomes more proven over time, it is clear the ozone industry is staying around for the long term.
Recently the community of Emporia City voted to replace their 20 year old ozone system with a brand new ozone system at a cost of $2.6 Million. Read more about this below:
City Commission approves Ozone replacement equipment request
Posted: Thursday, July 2, 2015 9:15 am | Updated: 9:58 am, Thu Jul 2, 2015.
The Emporia City Commission approved a request authorizing the Public Works Department to proceed with an Ozone Equipment purchase Wednesday afternoon during an active session.
The current equipment at the Water Treatment Plant uses atmospheric air and bubble diffusers and was installed in 1995, with an expected life of 15 to 20 years.
The Ozone equipment and process is the primary disinfection action at the Water Treatment Plant.
“We are replacing a piece of equipment that disinfects our water,” said Mayor Danny Giefer. “Our equipment now is out of date and we need to replace it.”
In the next few months, a qualified contractor will be chosen to install the equipment, which is slated to be completed in 2016, with a project construction cost estimate of $2.6 million.
Assistant City Manager Jim Witt said it was time to replace the old equipment.
“The equipment now is 20-plus years old,” Witt said. “LIke all equipment, parts become the issue. We pride ourselves on quality water and this is the way we can continue to ensure that quality of our water. The amount of $2.6 million is a tremendous amount of money, but it’s the way to go. Ozone replacement is shown to be an effective way to treat and purify water. We have a very efficient timeline and are hoping by the end of 2016, the equipment is all in and we won’t have to worry about it for another 15 to 20 years.”