How do you get Arsenic, Iron, Sulfur and Methane out of your water?
I am going to tell you about a job which may not be the worst water we have ever seen, but it is sure in the TOP 20! This is about a family in Ohio who had arsenic, sulfur, iron and methane in the water, to go along with some typical hardness. All of those things are problems, but roll them all together and you have a really big problem.
Actually, this job came to us via the US EPA (Environmental Protection Agency) because they knew that US Water had successfully removed arsenic from the water for an elementary school in Fountain City, Indiana (I will blog about that installation very soon).
The EPA knew about the arsenic, iron, sulfur and hardness, but they had no idea there was methane in the water. It took them a while to be convinced, but once they saw the water burning, they were convinced. YES, BURNING!
In case you wonder how to detect methane gas in your water, you will need two things: (1) a plastic milk jug; and (2) a lighter. here's how:
- Take a one gallon milk jug (drink the milk if it's not empty) and rinse it out thoroughly;
- Next, go to the faucet in your home that is the furthest away from your well pressure tank and make sure that you haven't used any water from the faucet for several hours;
- Position the milk jug under the faucet and remove the cap, but keep in in your hand so that you can screw it back on quickly;
- Turn the faucet on and directly run it until the jug until it is about 75% full;
- Quickly secure the cap back on the top of the jug (shut off the water);
- Let the water sit in the plastic jug for 30 to 45 seconds and then with a lighter ready, uncap the bottle and place it directly above the opening; and
- If methane is present, it will ignite - Be careful because I have seen it shoot a flame two to three feet high and singe someone's eyebrows.
So, they had methane to go with their arsenic, iron and sulfur. The methane has to be removed first because it is compressible and water softener or filter control valves will not work effectively. In this case, we recommended the following:
: 4.5" x 20" 20 Micron Sediment Pre-filter to removes any silt, sand or sediment that could create problems with the rest of the water treatment devices. I'll give you a little tip: Any system will function better when there is a pre-filter ahead of it, because grit and solids wreaks havoc with water treatment equipment.
Open air tank with a pellet chlorinator. The tank is vented to the outdoors above the roof-line so that the methane gas fumes cannot accidentally ignite. The chlorine starts oxidizing iron and sulfur and the disinfects the water. Since the tank is "open air" it includes a submersible pump and pressure tank to re-pressurize the water and deliver it to the home. By the way, the pressure is incredible!
: A Backwashing Carbon Filter removes the chlorine, oxidized iron and sulfur and some of the arsenic (which binds with the iron). This filter cleans itself by backwashing every couple of days to remove the accumulated particles.
: Next there is a Cation-Exchange Water softener which regenerates with salt and removes the hardness from the water.
: Then there is an Anion Exchange Water Softener that uses salt with Arsenic Selective Resin to remove the remainder of the arsenic.
Finally, there is a Reverse Osmosis System for drinking water at the kitchen sink, just to assure the best water possible.
The system was installed in 2008 and is still functioning perfectly.