Ozone Use in Wichita Aquifer Storage and Recovery Project
Mazzei released this great informative video on the use of Mazzei products to dissolve ozone into water for the Wichita aquifer storage and recovery project. This video shows the expertise that Mazzei has on large scale projects like this:
Mazzei Degas Separator was selected for the Wichita Aquifer Storage and Recovery Project. Mazzei’s GDT™ Degas Separator was chosen as the best method for entrained gas bubbles removal.
The expertise that Mazzei has on ozone mass transfer is also utilized on smaller applications with the commonly used ozone injectors and flash reactors.
Ozone Solutions for Endocrine Disrupting Chemicals in Wastewater.
Mazzei released this great video on the use of ozone to remove EDC’s from wastewater. While this is a promo video for Mazzei products, it is still interesting as a promo video for ozone use in general:
We recently updated our OSW-3 Ozone Injection System. This is a small ozone injection system using an ozone generator with integrated air dryer. This is a small and compact ozone injection system for use with water flows up to 10 GPM. Following are the highlights of updates:
Improved contact tank allows for water pressures up to 50 PSI
New CM5 Grundfos Pump
Smaller footprint
Integrated water trap
Provisions for all the same optional automation as our popular Waterzone series
The OSW-3 uses a PVC mixing tank to lower costs verses our stainless steel models. The same stainless steel ozone injection pump is used on both the OSW-3 and the Waterzone Ozone Injection Systems. This ensures maximum durability of the system for the long term. In fact, many parts of these systems is same, this helps lower costs while providing a durable system.
The Flash Reactor manufactured by Mazzei Injector Company is yet another great tool to dissolving ozone gas into water. This product has been in production for a few years now. I wanted to take the time explain a little about where these might be used in an ozone injection system.
Typically a Flash Reactor would be used in conjunction with an Ozone Injector. The Flash Reactor can be placed in line after the ozone injector to aid in mass transfer of ozone into the water. Following is the description of the Flash Reactor from the Mazzei website.
The patented Mazzei® Flash Reactor™ is a uniquely innovative mixing chamber that incorporates a re-directional and shearing design of the gas/liquid water mixture that allows for a rapid dissolution and attainment of gas/liquid equilibrium. The result is high mass transfer efficiency with minimal time required.
Research done on the flash reactor and ozone injector was performed by the Civil and Environmental Engineering Department, 3-093 Markin/CNRL Natural Resources Engineering Facility, University of Alberta, Edmonton, Canada. This research abstract can be viewed HERE at the Mazzei Website.
A great use of the flash reactor is when ozone injected into water with an ozone injector at low pressures and improved mass transfer of ozone is desired. Many systems can benefit from the addition of a Flash Reactor into the system to improve mass transfer of ozone without any other modifications of the system.
For more ordering and sizing information on the Mazzei Flash Reactor, visit our website HERE.
For technical help and engineering contact our application engineers, we would be happy to help you design a solution that works for you.
The use of ozone for wastewater disinfection has been growing in popularity due to strict regulations on fecal coliform and other pathogens. As chemical costs rise, ozone becomes a more cost effective solution for wastewater disinfection. Ozone can be produced on site using oxygen from the ambient air. Only electrical power is required for operation.
When discharge limits on pathogens are lowered, the natural solution is to add additional chemicals to meet these new limits. Adding more chemicals to a wastewater stream effluent for disinfection may seem like an easy solution at first; however, in many cases these chemicals must then be removed from the effluent wastewater prior to discharge due to limits on these chemicals. For example, if chlorine is used for the reduction of E.coli the chlorine must be removed using de-chlorination prior to wastewater discharge. If 20% more chlorine is required to meet the new wastewater discharge limits, 20% de-chlorination must also be applied to this water. Over time, these costs can really add up.
Ozone’s reactive properties allow it to quickly kill bacteria. In fact, ozone is ten times stronger than chlorine as a disinfectant.
Ozone is a green solution
Ozone is a green solution to wastewater disinfection. Ozone is produced on site and is all natural, formed from only oxygen. No by-products or waste products are formed in the creation of ozone.
The use of ozone eliminates the need to transport chemicals to the site.
Ozone is produced on-site from air and electricity, all renewable resources.
Ozone is a completely renewable resource.
Potential hazardous storage of chemical is removed with ozone use.
After ozone is dissolved into water, ozone reverts to oxygen leaving no residual in the water.
The Ozone Advantage
Using ozone for wastewater disinfection offers many advantages in cost savings, space savings, labor savings, and cleaner water. More and more wastewater plants are making the switch to ozone use to capitalize on these advantages.
Ozone leaves no residual, so only ozone injection is necessary. No second chemical for quenching is necessary.
Ozone is produced on site from renewable resources and requires no chemical storage.
Ozone is clean, safe, and reliable, taking up less space, and less equipment than many chemical treatment/storage systems.
Using ozone saves money by eliminating on-going chemical costs.
Ozone will destroy all bacteria without a preference to one type of organism. Ozone will also remove some BOD, COD, and many other contaminates in the waste water stream. Many customers comment on the clarity of the water after switching to ozone.
Ozone is effective on wastewater with TDS and TSS levels that may not be acceptable with UV disinfection. Therefore, filtration will not be necessary for ozone use in many wastewater applications.
Fewer secondary by-products like tri-halomethones (THM’s) are formed with the use of ozone.
Secondary Benefits of Ozone Use
The use of ozone in wastewater disinfection has gained popularity in recent years due to the secondary effects that ozone may offer in some applications. These secondary benefits have helped make ozone a cost effective alternative, and a necessary alternative in some applications.
Color removal with ozone is a common use of ozone. While ozone is used primarily for disinfection a secondary effect is color removal of the effluent water stream. Using ozone for disinfection may offer the elimination of a second technology used for color removal.
Oxidation of odor causing compounds in the water may also be a secondary effect of ozone use in wastewater. By eliminating these compounds odor control may be completed during the disinfection process.
Micro-pollutant removal from water using ozone is gaining interest at a rapid rate. Using ozone for wastewater disinfection may offer the secondary benefit of micro-pollutant removal and eliminate the need to add processes in the treatment stream with future regulations.
Suspended solids may also be removed or reduced with the use of ozone. Ozone is commonly used for the removal of suspended solids in drinking water, these same effects are achievable in wastewater.
History of Ozone and Wastewater Disinfection
Ozone used for wastewater disinfection became popular early on when the widespread use of ozone gained popularity in the 1970′s and 1980′s. Due to lack of equipment reliability and rising costs, the use of ozone almost complete disappeared from this application. In recent years however, ozone is getting another chance in many locations across the USA and Europe. This is partly due to improvement in equipment reliability and lower cost; however, the main reason for this revival is the secondary benefits that ozone offers along with the increased costs of chemicals creating an economic advantage. See the timeline.
Newly added to our rental line, a 300 g/hr ozone generation and injection system. This is a skid mounted turnkey ozone injection system capable of injecting 300 g/hr of ozone into 200 GPM of water. This is a great opportunity to determine if ozone is right for your application.
To see all the details click HERE
To see our complete ozone equipment rental line, click here.
What is ORP and what does it have to do with ozone?
First, let’s start with the basics. ORP is not a word, it is a set of initials that stands for Oxidation Reduction Potential. ORP is also known as Redox Potential.
ORP is normally measured in millivolts (mV). ORP readings in water are a measurement of oxidation potential of that water. Ozone is an oxidant that can be dissolved in water, as is chlorine, and bromine. Any of these oxidizers consist of electron potentials that can be reduced. A higher level of oxidizers in the water will create a higher ORP reading.
Most water will have a positive ORP reading due to the dissolved oxygen level in the water. Wastewater and other contaminated water may have lower ORP levels (close to 0 mV). As more ozone is dissolved in the water the ORP level will increase. These ORP readings can be correlated to an Ozone reading using a hand held test kit.
It is important to note that any contaminates dissolved in the water will alter the ORP level in the water, so there is no direct correlation between ORP and Ozone levels in water. It is necessary to test the dissolved ozone level of your specific water and correlate that to the ORP reading of your water.
An ORP probe is really a millivolt meter, measuring the voltage across a circuit formed by a reference electrode constructed of silver wire (in effect, the negative pole of the circuit), and a measuring electrode constructed of a platinum band (the positive pole), with the pool water in between.
We now offer an alternative for calibrating larger dissolved monitors or to test dissolved ozone levels in a lab setting. The SAM-2 and the SAM-3 monitors are inexpensive dissolved ozone monitors that are both compact and reliable.
The SAM-2 has a range of 0.15-0.75 PPM, making it perfect for lab settings. No activator solution is required, which helps to cut costs. This monitor reads the ampoule that needs to be tested, and then will read a blank reference ampoule that is provided. If your ozone levels exceed its range, that is okay. Just dilute a fresh sample and retry the test! When you multiply the reading by the dilution factor you will have an accurate result. It is that simple.
The SAM-3 has a range of 0.20-3.00 PPM which makes it more appropriate for calibrating dissolved ozone monitors that are constantly in use (for example, an AS-500 on an ozone injection system). Using this analyte meter to calibrate your monitor monthly will help ensure accurate readings. This unit is also very simple to use – just zero it using the provided blank ampoule, and it is ready to test. This only needs to be done once (not between every test), which will speed up the testing process. After the unit is zeroed, you can test any number of ampoules.
You can get more information on these monitors by visiting the SAM-2 or SAM-3 on our website.
Just recently, we have put new pressure regulators on our website. They are Ozone compatible and corrosion resistant. With it’s stainless steel body, teflon seals, and viton o-rings, it is sure to last quite a long time. With pressure ranges going all the way up to 100 psi, and bursting pressure at 500 psi, there are useful in most situations.
As a company that manufactures industrial use ozone generating systems, we use these pressure regulators on all systems that require one. They have many more uses though other than putting them in an ozone generating system. They can be used in most situations that would require having a corrosion resistant regulator, such as harsh chemicals or an unpredictable weather setting.
The City of Springfield, MO will be hosting a groundbreaking ceremony today (Feb 17, 2010) for their new Ozone Disinfection System. This $16 million project is funded through the American Recovery and Reinvestment Act, and distributed by the EPA which is directing funds to projects that meet both economic and environmental needs.
By upgrading their ozone disinfection system, Springfield will accomplish several goals. Perhaps of most concern to area residents is that City’s disinfection capacity will be increased by 50%. This increased capacity will improve downstream water-quality in both Table Rock Lake and Lake Taneycomo. In addition, the project is expected to create 30 jobs until its expected completion in 2012.
The increased efficiency of the new ozone system is expected to decrease energy consumption by $4 million over 20 years. Maintenance costs will also be reduced, for a savings of $2 million over 20 years.
The groundbreaking is to be held at Springfield’s Southwest Wastewater Treatment Plant (SWWTP), beginning at 11:30 am. Attendees are expected to include Congressman Roy Blunt, as well as several state and regional representatives of the DNR and EPA.
Springfield, MO Southwest Water Treatment Plant
The Springfield SWWTP was originally constructed in 1959 and has gone through several major upgrades since then. It currently removes 70,000 pounds of pollutants from wastewater per day and is capable of treating 42.5 million gallons of wastewater per day (continually) or up to 90 millions per day (over brief periods). You can find more information at the following link: http://www.springfieldmo.gov/sanitary/southwest.html
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