Ozone used for water reclamation

Recently we installed an ISX-Series ozone system for a water reclamation project. Below are a few images of this install.

Water reclamation with ozone
Ozone used for water reclamation
ISX ozone system for water re-use
Water re-use using ozone water treatment

This is a factory water reclamation project, water follows the following path:

  • Water collection tank, holding tank
  • Chemical water treatment for coagulation – solids removed from tank
  • Water filtration – screen filter
  • Ozone water treatment
  • Filtration – bag filter
  • Holding tank, ozone bubbled in this tank
  • Sand filtration
  • Water holding tank, ozone bubbled in this tank to keep bacteria from growing
  • Water used in toilets and cleaning in the factory

The ISX-series ozone system is used in this project. This specific system was designed to produce 250 g/hr ozone and treat a water flow rate of 30 GPM passing through the ozone system.

ISX-Series ozone water system

Have an application where ozone may allow you to re-use water, or treat water for safe discharge? Give us a call, we would be glad to help.

Ozone Combats Red Tide

The USA’s Florida Southern Gulf Coast has been experiencing a severe red tide algae bloom since November 2017.

This particular event is very strong, resulting in major fish kills and disagreeable air quality on  the beach. Red tide is a type of toxic algae that naturally blooms almost every year in Florida. It often dissipates in a few weeks or a month or so. This particular bloom is very strong and has resulted in a state of emergency being declared for the affected areas. Because the tide causes breathing problems, tourism has been severely affected.

Scientists at the Mote Marine Laboratory, Sarasota, FL are conducting experiments to combat the spread of the red tide and prepare for future outbreaks. They are testing a process that

pulls red-tide-infected water from canals into 25,000 galloon tanks, treats it with ozone and pumps it back into the ocean. The initial experiments were successful in removing the red

tide and its toxins and the water chemistry returned to normal within 24 hours. This experiment was featured on several television news shows including CBS and PBS.  On September 23, 2018, Florida Governor, Rick Scott approved a $2.2 million grant to Mote Marine Laboratory to

expand its ozone treatment systems and to conduct new field testing of a specialized clay focused on quelling red tide. The testing should start within a few months.

Learning How to Harness the Power of Ozone – The Balance Barometer

A balance barometer is a very simple device that provides fool-proof protection of ozone generating equipment in a venturi injection system.   As someone new to the ozone industry learning how to harness the power of ozone, I was intrigued by the balance barometer I was asked to construct for one of our systems.  How does it work?  Why are they useful?   Is there anything particular about the dimensions that make it work properly?

 

A balance barometer is used to keep water from backing up into the output side of an ozone generator.  Corona discharge ozone generators will reliably generate ozone if, and only if, they stay very dry.  Any moisture coming into the ozone generator will shorten its life.   In a system where a venturi is used to inject and dissolve ozone in water, a catastrophic flood of water into the ozone generator is always only seconds away.  Critical to the success of any such system is that point between the ozone generator and injecting the ozone into the water stream.

 

Under normal operating conditions, the venturi through which water is forced will create suction and prevent any water from flowing back to the ozone generator.  This water will immediately flow to the generator if water flow is reduced or stops in the venturi.  A simple check valve is built into Mazzei venturis to prevent this backflow.  An additional series of stainless steel and Kynar check valves will stop or slow this water most of the time.   But even “slowing the water” or “most of the time” is a risk that can be eliminated with a simple balance barometer.

 

A balance barometer is a U shaped tube with one side about twice as high as the other.  The top of the high side is capped off, and two holes are drilled into the cap: one straight down from the top, and one in the side at the bottom edge of the cap for ozone tube fittings. One inch clear PVC works well for visual monitoring, and the diameter allows bubbles and water to pass by one another without hindering its performance.

 

So let’s hook it up to see how it works.  The very top fitting goes to the ozone generator, and the side fitting just below the top fitting goes to the venturi suction port in our system.  If sufficient water flows through the venturi, it will begin to draw air through the check valves, ozone generator, and balance barometer.  If we put some water in the balance barometer, it will block off air flow through it and force all the flow to pull through the ozone generator.  This would be the normal operation.

 

Now if the particular water system has some water pressure when water isn’t flowing through the venturi, as in a well water system, water will be forced back out the injection port.  The check valve should prevent water back flow, but if ozone has deteriorated the seal or a tiny speck of something prevents a tight seal, water will begin to flow past it and toward the ozone generator.  When it reaches the balance barometer, it will simply add water to it until the short end overflows.  Once water flow is restored to the venturi, the suction will return.  Any water in the line or extra water in the barometer will be sucked into the venturi and normal operation resumes.

 

The balance barometer works well with ozone generators that operate under very low pressure or a slight vacuum.  Only 1 psi of pressure or vacuum will balance with 27 inches of water making the minimum size short side of the tube for such a system 27 inches.  Systems that simply use the venturi to pull air through the ozone generator work well with a balance barometer.  If a balance barometer is not practical for a particular application, our stainless steel backflow preventer will provide the same type of protection using a built-in float.

Ozone removes color from water

Ozone does a great job removing color from water.  Ozone is an oxidant and will bleach water efficiently.  We were recently shipped a sample of wastewater from a client looking to have us determine if ozone would remove color from their water.  We were very impressed with the results, and decided to share, see video below for impressive results of ozone removing color in this water sample:

The water sample shown is 250 ml. Ozone is generated from oxygen. Oxygen/ozone flow rate of 1 LPM is initiated about 5 seconds into the video. Ozone concentration is 10% by weight.

For more information on ozone use for color removal in wastewater, see our website at the link below:

https://www.oxidationtech.com/applications/water-treatment/wastewater.html#answer2

Ozone system service – water filtration system with ozone

Recently Oxid tech service techs spent some time servicing a few older ozone systems used for livestock drinking water.  Both of these systems are used specifically for iron removal from well water on dairy farms.

ozone filtration system
Ozone filtration system for livestock – 200 GPM ozone and filtration system

ozone removes iron from livestock water
Ozone filtration system for 6,000 head dairy farm – 600 GPM ozone and filtration system

While these systems are older, only basic maintenance is required.  We visit these sites quarterly to change filters, calibrate sensors, and perform basic maintenance.  If you are looking for service on your ozone system, call our office, we may be coming to your area soon!

Ozone is an effective and chemical-free solution to iron removal from water.  Ozone will efficiently oxidize iron from water to a filterable state.  Backwasheable sand filters can be used to efficiently capture iron and discharge to drain safely.  A proper ozone system will effectively remove iron, manganese and many other minerals from water reliably with no use of chemicals.

Ozone Injection and filtration system
Ozone filtration system diagram

Click here to learn more about ozone use for well water treatment

Ozone can be used to efficiently remove many undesirable contaminants from water.  If your well water is less than ideal for your livestock, or even for your household, we may be able to help.  Ozone is commonly used to remove the following:

Ozone systems require no additional chemicals.  Ozone is produced from ambient air and introduced into the water.  Bachwashable filters (if necessary for your water) remove the undesirable contaminates from your water with no consumables.

ozone filtration system
Ozone system with filtration

Ozone filtration systems can be compact and simple.  Image above shows a basic ozone system with filtration.  Systems can also be built for large water flows as shown above.  Whatever your need, if your unhappy with your water quality, give us a call today.  We can help.

 

In celebration of earth day – consider ozone as a green method for water treatment

We have only one allotment of water in this world.  We will not get another.  As our water becomes contaminated we need better technologies to purify water safely.  Ozone is a green technology offering the perfect method to remove many contaminants from water.

 

In 1995, the World Bank estimated that contaminated water causes ten million people (10,000,000) to die annually and is the reason for 80% of all illnesses in developing countries; and that one billion people (1,000,000,000) have no access to clean drinking water.
Considering all the benefits and lack of drawbacks, ozone is a good choice for many water treatment applications.

 

Ozone for Water Treatment

Because of the excellent disinfection and oxidation qualities of ozone, it widely used in many water treatment applications. Each of these applications has various uses and methods for implementing and applying ozone.

 

Ozone has a wide variety of uses and applications in water treatment.  Ozone can be used as a disinfectant, decolorizer, deodorizer, detoxifier, precipitant, coagulant and for removing tastes. Consequently, the use of ozone should be considered when there is a need to address any of these water issues, and particularly when there is suspicion of water born pathogens as ozone is such an effective biocide.

Ozone is a green water treatment alternative lowering chemicals and reducing by-products and new residuals in water.  As ozone breaks back down to only oxygen there are no residual remaining in the water after ozone water treatment.  Ozone can also lower chemical requirements as ozone coagulates and precipitates many substances by itself, and is also a reasonably effective flocculant. Because of this, it can reduce other chemical requirements in treatment facilities.

Oxidation with ozone is efficient can lower chemical costs and overall energy consumption.  Ozone is the most powerful and effective broad spectrum microbiological control or disinfecting agent available. As an example, for the inactivation of Giardia cysts, the Ct (concentration & time) is about 100 times greater for free chlorine than for ozone. With viruses, the Ct is about six times greater for chlorine than for ozone. For Cryptosporidia, ozone is the number one, recommended disinfectant by the US EPA due to efficiency in inactivation.

Ozone is safer to use than alternative chemicals. , there is less need to add high concentrations of a long-lived poison to the water that may soon become drinking water. When ozone is implemented in drinking water treatment, the chlorine demand is greatly reduced, as it is then needed only as a way to provide a residual in the distribution system at low levels. This minimizes the potential for producing carcinogenic THMs, and other chlorine by-products.
Ozone may also lower overall chemical consumption due to its ability to disinfect without adding other chemicals which may later need to be removed.

 

What Can Ozone Treat In Water?

If it can be oxidized at normal temperatures and pressures, ozone can treat it.

Water treated with ozone may need to be filtered or settled, as ozone tends to coagulate and precipitate many impurities in the water.
Essentially, problems in water quality that are usually addressed with acid, peroxide, chlorine or other oxidants are probably prime candidates for ozone treatment.

Summary:

If ozone cannot be used to treat a water quality problem, it is likely that no other available oxidant will to do the job either.
The following contaminants or problems can all be potentially treated with ozone:

  • Bacteria – all known, including iron bacteria
  • Minerals – inorganics, dyes, and others
  • Metals – Iron, Manganese and many other
  • Organics – color, algae, other carbon compounds
  • Protozoans – all known, including Cryptosporidium, Giardia and all Amoebae
  • Viruses – all known
  • BOD & COD – reacts quickly, as ozone is a really active form of oxygen

 

The use of ozone in combination with UV or hydrogen peroxide creates an Advanced Oxidation Process (AOP) to create the Hydroxyl Radical (OH-).  This is an even more powerful method of oxidation than ozone alone.  There are no contaminates that can be oxidized that will not be oxidized by this process.

Click here to learn more about ozone and water treatment.

 

 

The importance of Groundwater Remediation

This article reposted from a distributor.

Groundwater remediation, as the name suggests, is the process of identifying and fixing groundwater problems, usually pollution or other contaminants. In some cases, groundwater remediation is the only way to solve potentially destructive environmental and health problems for whole communities. Groundwater remediation is a huge global industry, devoted to managing pollution. This remediation process has to deal with some of the world’s worst environmental problems on a daily basis.

The Importance of Groundwater Remediation

Deadly Issues in Groundwater Remediation

Groundwater contamination is one of the most common, and most difficult, environmental problems. Contaminants may include oil, chemicals, heavy metals, and other poisonous substances. In some cases, contamination is so bad that water can’t be used at all. You couldn’t even use it to wash your car.

The other problem is that these contaminants will remain in the groundwater until the problems are solved. Prevention, obviously, is the best solution. In some cases, however, prevention and a cure must work together.

A good example of this type of problem is a case which occurred in Sydney. Serious contamination had released oil into groundwater. A total of 12 different types of contaminants were present in groundwater, including metals, in large quantities. These materials, if ingested, could be fatal to humans, or cause serious health issues. If released into the environment, the materials could also cause long-term contamination for fish and the local food chain.

The need was to both deal with the existing problem and prevent future problems. The solution was to develop a site-specific project to extract and eliminate contaminants using MyCelx filters, a top-of-the-line, modern wastewater filtration system.

Wastewater filtration and customized problem-solving delivered excellent results in this case. It should be noted that any incident of groundwater contamination may involve multiple factors. Each situation requires individual problem-solving and systems adapted to managing contamination issues.

 

Long Term Solutions

One of the major problems in groundwater remediation is simple enough – Understanding the problems. Most people don’t understand how dangerous contaminated water can be and how much damage it can do. Best practice is to implement long-term solutions using the latest technology to completely eliminate current groundwater and future contamination.

The bottom line here is that current problems can become expensive future problems. In many industries, groundwater contamination can also be a major legal risk. The good news is that MyCelx technology is drastically improving the cost efficiency of groundwater remediation. New treatments, new filtration systems, water purification systems, ozone treatments, and other advanced technologies are making the work easier, cheaper and quicker. The results speak for themselves.

Follow this link for more information on ozone and groundwater remediation.

A pen that produces ozone to purify water

Today I found a story about a pen that produces ozone to purify water in small volumes for travelers, campers, or people in countries with poor water quality.

Read complete story HERE

 

Roving Blue's new O-Pen brings ozone purification anywhere you go
Ozone pen to purify water on the go

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.

From article:

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.

The O-Pen offers an estimated 30 uses per charge and recharges via USB
The ozone pen is easy to recharge on the go, with USB charger.

This demo water looked pretty clean to start, but even if it wasn't, it'd would have...
Ozone pen bubbles ozone gas into water. The bottom of the pen lays in the water to bubble ozone into the water while operating.

The O-Pen relies on bubbling ozone to free water of dangerous microorganisms
Very small bubbles created from the ozone pen.

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.

Ozone Water Treatment

 

 

 

Mitsubishi Electric to Field Test Ozone Backwashing Energy-Saving Membrane Bioreactor in Singapore

Expected to contribute to global water sustainability

Mitsubishi Electric Corporation announced today that it will conduct a field test of its Ozone Backwashing Energy-Saving Membrane Bioreactor (Eco-MBR) for the recycling of sewage and industrial wastewater with low energy consumption at the Public Utilities Board’s (PUB), Singapore’s national water agency, Changi Water Reclamation Plant (CWRP). The field test is expected to verify that the Eco-MBR, when compared to conventional MBRs, both potentially reduces energy consumption and dramatically increases the quantity of permeated water per membrane filter surface area (flux), thanks to a filter-cleaning process using ozonated water. Mitsubishi Electric is now developing practical applications for sewage, industrial water treatment and recycling systems, which are expected to contribute to global efforts to achieve sustainable water environments.

Building on the technological expertise of more than 1700 delivered ozone generators, Mitsubishi Electric has been developing its high-performance Eco-MBR as a solution for areas around the world that are experiencing increased demand for water. Due to limited water resources in Singapore, the government and industry are successfully applying water-reuse solutions to provide alternative, sustainable supplies of water, especially for industrial use. Currently, Singapore’s supply of potable recycled water (known as NEWater) is sufficient to meet 30 percent of the nation’s water needs. The pilot-scale study will be carried out in cooperation with the PUB and the Centre for Water Research at the National University Singapore until December 2016. Commercialization of the Eco-MBR is scheduled by the year 2018.

Tests so far have shown that the Eco-MBR is able to achieve a high-quantity flux, or quantity of permeated water per membrane surface area, that is more than twice the rate of conventional MBRs*. The key is regularly backwashing the membranes with highly concentrated ozonated water to remove virtually all organic foulants, thereby increasing membrane permeability. In addition, the Eco-MBR lowers energy consumption by using a reduced flow rate for air bubbles that are emitted from a blower to clean the membrane surfaces.

Learn more about ozone for water treatment HERE

Ozone reviewed for water reuse options

Read full article HERE

The Qatar Environment & Energy Research Institute (Qeeri), one of the three research institutes under Hamad Bin Khalifa University, is in the process of conducting a pilot research into the reuse of treated sewage effluent and agricultural waste water, Gulf Times has learnt.
“A modular pilot plant will be used in the experiments to deliver improved, high-quality water that can be used for irrigation, grey water application, district cooling and other purposes” said Qeeri acting executive director Dr Khalid al-Subai.
“The reuse of treated sewage effluent will provide a major water source in Qatar for agriculture and industrial applications and reduce the demand on desalinated water and major capital investments to build more desalination plants.”
According to Dr al-Subai, the Qeeri project “Reuse of Treated Sewage Effluent and Agriculture Waste Water” aims to investigate the efficacy of ozone and ozone-based advanced oxidation process in conjunction with other treatment processes for the reuse of treated sewage effluent, industrial, and agriculture wastewater.
The official explained: “The pilot scale research would investigate the improvement and optimisation of wastewater treatment processes from reuse perspectives and the efficacy of advanced treatment technology such as ozone and ozone based advanced oxidation process to provide the required treatment.”
These applications could provide wastewater treatment plant operating authorities significant information on best practices to reduce and eliminate negative impacts from waste water effluents.
The design will include hybrid technologies to provide an optimised operation that could improve treatment process.
The official pointed out that Qeeri was dealing with two national grand challenges of water security and energy security. “Ensuring water sustainability includes identification and management of water resources; maintaining water production in terms of quantity and quality, researching the most efficient desalination technologies at minimum cost, conserving environmental quality and managing water for society,” he maintained.
Dr al-Subai said Qeeri had a project-oriented structure where basic fundamental and applied sciences are integrated to achieve water sustainability.”The main research areas are desalination technologies, groundwater mapping and recharge, and reuse of treated wastewater.
We are conducting cutting-edge research and development programmes in these three areas.
“The aims of these R&D projects are to: increase energy efficiency, reduce costs, and minimise health risks and environmental impacts.The water security grand challenge programme at Qeeri involves the research and development of innovative techniques from concepts to near market products.”
The official noted that high quality and innovative research programmes were pursued at Qeeri along with other stakeholders including Kahramaa, QWEC, Ashghal, Ministry of Environment and Municipalities, Qatar Cool as well as with industries in the oil and gas sector that use and produce large amount of water.
“A key component for achieving water sustainability is the partnerships with governmental water authorities.
Qeeri has also launched a monthly open programme called “Science Majlis” as part of its activities to raise awareness among school children and the public on the topic,” he added.

For more info on wastewater treatment with ozone check out our website HERE.