Below we can see the OS-6 Ozone Monitor with an SAT-1 Signaling Tower to enable visual/audible alarms (if ozone levels are detected above .1 PPM, the OSHA safety limit), as well as an SM-EC Sensor which allows for ozone detection between either 0-20 or 0-50 ppm. The OS-6 is an industrial grade ozone controller/monitor, and it is designed to optimize accuracy, ease of installation and operation.
This is how your OS-6 Ozone Monitor should appear when it is connected to the SAT-1 Signaling Tower and the SM-7 Sensor.
CHEMetrics Chemets self-filing reagent ampoules are a great way to test for dissolved substances in liquids. These visual test kits allow you to obtain results by measuring the color of the sample according to the color comparators provided with the kit. This unique method allows you to attain results quickly and accurately with minimal contact with potentially hazardous materials. While traditional methods often require multiple steps and thorough preparation, these test kits allow you to obtain dependable results with a few simple steps. By simplifying the testing method, Chemets test kits reduce the potential for operator error. Additionally, each of the ampoules contained in the test kits is vacuum sealed which helps eliminate the problem of obtaining inaccurate results from stale or unstable reagents. These reagents are stored right in the tip of each ampoule and sealed in glass, thereby minimizing direct contact with the chemicals.
-30 self-filling ampoules
-Low and high-range comparators
-25mL Sample Cup
Videos Overviewing the CHEMetrics Dissolved Ozone Test Kits:
In this post, I introduce a working concept for a low-cost, 400 gallon per day water harvesting system built as much as possible with recycled materials and local equipment. The goal of this project is to empower families, tribes, and small communities with the knowledge and resources needed to take control of providing safe drinking water. This water treatment system is the brainchild of Clint Elston who has worked tirelessly his whole life gathering ideas and developing practical solutions. My expertise is in the ozone treatment component.
Ozone destroys harmful bacteria and breaks down organics in the water so they can be more easily removed. The ozone assists the RO filter, enabling it to operate without wasting the drain water needed to rinse contaminants from the filter.
The four barrel system
Water collection vessel – Rainwater/grey water is collected in the white 275 gallon tote. This tote simply serves as a reservoir for water collection. Any large water collection device can work.
Dirty Circulation pump (right) for the dirty water loop (yellow/green) pulls “dirty” water from this tank, picks up waste RO water, picks up ozonated water, and fills/tops off barrel #1 in the 4 barrel system before returning any leftover water to the rain tank. If only one pump is available, it is possible to use this pump for the clean water loop as well. See diagram.
Clean Circulation pump (left) for the clean water loop pulls pre-treated water from barrel #4. This water has been treated with ozone and much of the sediment settled out to the bottom of the first three barrels. This clarified water is pumped to two locations: 1) through a venturi for ozone injection and 2) a reverse osmosis filter.
Ozone injection – Ozone is a naturally occurring gas made with oxygen and electricity. A high voltage discharge breaks the bond between the two oxygen atoms of an oxygen molecule and the free oxygen bonds with other unbroken oxygen molecules to form an ozone molecule of 3 oxygen atoms. This high energy form or oxygen quickly and naturally destroys pathogens and water contaminants. A 4 gram/hour flow of ozone at a concentration of about 7 grams/cubic meter is pulled from the ozone generator through tubing into a venturi which injects the ozone into the water stream. The ozone is needed to control bacteria and pathogens as well as oxidize organics and other contaminants. The oxidation prevents the buildup of biofilm in the RO filter.
Four Barrels – The ozone serves to kill bacteria and to oxidize contaminants helping them settle out. The ozonated water enters the bottom of barrel #1 (off-gas, reaction, settling) where the excess ozone is able to off-gas. Ozone treated water moves from the top of the first tank to the bottom of barrel #2. (reaction, settling, clarifying) Barrel #2 finishes ozone reaction and continues settling of heavier contaminants. Clarified water exits the top and enters the top of barrel #3 & #4 (Settling stage one, settling stage 2). The primary function of tanks #3 & 4 is settling and clarification.
Reverse Osmosis Filter – Layers of soil and years of time naturally filter water in deep aquifers. A reverse osmosis (RO) filter is a very compact and quick way to provide potable water. For this water recycling system, we recommend the iSpring RCS5T 500 GPD Residential and Light Commercial Tankless Reverse Osmosis Water Filter System with Side-Flow™ technology and 1:1 Drain Ratio. The RO filter removes the very fine particles and remaining contaminants that did not get removed in the barrels.
Pressure Tank – The RO filter includes a booster pump to provide the pressure needed for RO filtration. Filtered water is stored in the 80-gallon pressure tank. RO wastewater is returned to the dirty water circulation loop. Where further ozone treatment helps these contaminants to break down further or settle out.
Ozone Generators – The market has been flooded with small ozone generators and exaggerated performance claims. Most of them would not work well for this application or produce the concentration of ozone needed. Unfortunately, a quality ozone generator that would give years of trouble-free service is costly. Getting one of these quality generators may be especially difficult in countries where a system like this is needed most. I am optimistic, however, that adequate generators can be built using common and even recycled components for a minimal cost. They might not be very compact or efficient, but it may be the best we can do at this time. I believe with some research, pooling of ideas, and diligence, we can come up with some great options for this water treatment system. Sharing ideas or links to ozone generator builds is welcome.
Clean Dry Air – Having a source of clean, dry, air for ozone generators can not be overemphasized. Moisture in an ozone generator produces nitric acid which corrodes and destroys ozone reactors. Desiccant is an effective and cheap way to provide this dry air. The desiccant needs to be dried out with heat. I have ideas for a solar desiccant dryer, but would like to know if anyone has ever tried this or seen it work? We sell a small desiccant dryer that needs to be manually dried out in a low oven, and we also have an automatic one that dries out the desiccant with electric heating elements.
I look forward to ideas for DIY ozone generators and air dryers. I hope to share some ideas of my own in future posts.
Our RCB-1 Relay Control Box can be used for a wide array of different applications. It is most commonly used to regulate gas levels as an accessory to ozone monitors. Another popular application is to use it in a custom ozone chamber, where the RCB-1 is connected to an ozone monitor, which tracks the ozone levels inside of a given chamber. Once the ozone level in the chamber reaches certain point, the ozone monitor will send a signal to the relay control box, which will then send a signal to an ozone generator to stop producing ozone for the chamber. Once ozone levels in the chamber drop past a desired level, another signal will be sent through telling the ozone generator to once again begin producing ozone until the chamber gets back to an ideal level. Simply put, the RCB-1 is most typically used to regulate the ozone levels for a given circumstance.
We recently had a customer that wanted to regulate the production of his oxygen concentrators. After a call with one of our ozone specialists, they came to the conclusion that a custom RCB-1 would be the best option. Our shop technicians were able to make an RCB-1 with a built-in pressure gauge that would allow the relay control box to regulate the pressure at which the oxygen concentrators were performing.
All is not lost when you open your ozone generator cabinet one day and find everything covered in dust. The dust is not toxic, just messy. It has come from the oxygen concentrator which uses a clay based zeolite material as a sieve to filter out Nitrogen from the air and supply dry oxygen for the ozone generator cells. The dusting can be caused by moisture getting into the sieve beds, excessive flow or pressure through the oxygen concentrator. Let’s work on getting repairs made first and then discuss ways to prevent this from happening again.
The oxygen concentrator (aluminum tank assembly on the upper left side) needs to be removed and either replaced or rebuilt. This assembly will be supplied either with 120 volt or 24 volt power. You will need to disconnect this power along with the air feed hose and smaller 1/4″ ID oxygen tube coming off the oxygen tank. The air hose is usually a 1/2″ barb fitting and the oxygen fittings at the other end are a quick connect type fitting.
Clean up the dust with a long bristle brush and vacuum or compressed air blower.
Remove the small tank from the oxygen concentrator. This a storage tank/surge tank and could be full of dust. It will also have an orifice on the outlet. Make sure this is open.
A network of green tubing with check valves and orifices are at the top. These check valves will need to be replaced and the orifices open.
Order new parts. It is likely that all the filters need to be replaced. The air compressor inlet filter, two coalescing filters to remove moisture and dust from the compressed air, and for some machines, an oxygen filter. (see the parts list below). When the oxygen concentrator dusts, you will need to order new or rebuilt sieve beds. It is also likely that the valve set is compromised and the Nitrogen exhaust mufflers are plugged with dust. The mufflers can be hard to clean, and are fairly inexpensive, so it is recommended to replace them. The valve is a shuttle valve which is sensitive the contamination and sticking. It can be rebuilt, but sometimes it is difficult to get it to work as well as new and it may be best to replace it.
Once everything is cleaned up, use the compressed air to gently blow some air through the ozone generator to make sure it is not plugged. Some generators are more sensitive to getting plugged and will have an oxygen filter to prevent this. Do not put too much pressure on the ozone generator.
Replace the filters.
Re-assemble the oxygen concentrator with new sieve beds, oxygen check valves, and valve set. Mount back in place. It may be easier to connect the oxygen lines before mounting.
Turn the system back on. Leave the ozone off. The compressor will turn on and the oxygen concentrator will begin cycling the valve to direct air through the oxygen concentrator. The compressor will reach 20-40 psi as the concentrator cycles air through the concentrator. Exhaust nitrogen will blow out of the muffler.
Oxygen flow and pressure will register on the cabinet door.
When the oxygen supply is stabilized and flow appears normal through the ozone generator, you can turn on the ozone generator.
The most common cause of dusting in an oxygen concentrator is excessive moisture in the feed air. If the ozone system is located in an environment with high humidity there are three things you could do: 1) move the equipment to a dryer environment and plumb the ozone to the point of use, 2) Plumb a refrigerant air dryer between the air compressor and the coalescing filters, 3) plumb an air hose to extend the air inlet filter for the compressor to a dryer location. Moisture, along with excessive oxygen flow rates are the leading cause of concentrator failure. When the unit is running, adjusting the oxygen flow to a lower rate will extend the life of the concentrator.
Replacement Parts (to visit a product page, click on the product name)