|paulsweeney 0 Posts||
Most of the dealers I do business with charge out at rates of 75 Euros to 150 Euros (about 100 dollars to 200 dollars) per call. Usually for a half hour onsite RO pre-filter change. Same again for 6 gpm UV system lamp change.
Full RO system service and callout is around 150 to 200 Euros. (Or swap out RO systems after 3 to 5 years for modest 300 Euro new system / higher spec upgrade.)
I import between 1,000 to 2,000 US made water treatment systems per year plus a container of RO systems and about 400 UV systems which a dozen or so of the trade dealers currently sell for around 800 to 1,200 euros for a water softener, 400 to 800 euros for RO systems, and 300 to 600 for the 6 gpm UV systems.
Fairly basic RO systems used to sell in prices up to 2,500 Euros (3,500 dollars) from some companies, but those days are gone, although most dealers used to sell for 600 to 1,000 Euros.
Salt here was sold in stores from (10 to 14 dollars per 55 lb bag,) and is nearer the 10 dollars equivalent in most places. Not many companies deliver although there are a small handful, and costs are normally upwards from 100 euros or 140 dollars for 10 bag drops.
Come to think of just a few years back, the record set for Celtic Tiger raw hide spanking robbery was set by some salesmen who would sell systems that packed up after a few months and costed 5,000 to 12,000 dollars equivalent.
One system sold to a family member of a particular salesman where they had bad drinking water and with high limescale costed 4,000 euros, it lasted a few months before clogging up, and it turned out they had no under sink drinking water filter or water softener installed, just a jumbo filter or two out in the shed, with a UV and venting tank.
The same sales chap sold an 8,000 euro system to a church minister which after a few visits and a few arguments became decommissioned, failing to just improve municipal water for water hardness. Similar firms here would charge 400 to 500 euros to go out to look at / service ? the mistakes they had installed.
Some scary stories back then, I think we need a new thread for those stories, may be good timing coming close to Halloween !
|stephencarr 0 Posts||
A pH of 10-11 achieved by adding caustic would not damage TFC or polyamide membranes. It is probably the best treatment alternative.
The rejection of the Merlin membrane by the TDS values you reported is only 92%. Even at 70 PSI you should be using membranes that can give a 98-99% rejection. I don't know what is available in Merlin membrane options.
I question the test that indicates presently you have no reduction in boron concentration at all. To meet the proposed drinking water limit of 0.5 ppm would require a 84% reduction in boron from your water.
A google search shows there is a free patent explaining how a RO membrane can be chemically treated for increased boron reduction.
|Jim Wark 8 Posts||
ps. from above......
We have never had good luck with Merlin membranes for removal of this sort. I don't know if it is the fact that they are low pressure, lower than normal rejection membranes or that I am just not capable of making them work, but I would suggest that you would use higher pressure membranes of a designed nature if you choose to take that path in treatment.
|Jim Wark 8 Posts||
I just did a boron removal system and some of the findings and treatments are listed in my blogs if you search by name. As for the materials to use, I would invest time into looking at Boron selective resin which can be regenerated, but safeguards would have to be put in place. The system I have installed is for a community potable water system and has been working just fine. You might try to get hold of Gary S. as to some engineering help as he has done several of these types of applications.
Good luck and keep me in the loop !!
|davehedger 0 Posts||
Dieldrin is a chlorinated hydrocarbon with parafinic characteristics. GAC should remove trace quantities, although analytical verification is recommended to assure removal to below the action level. Life of the GAC will be dictated by other factors in the water, not trace Dieldrin. Again, analytical monitoring should be used to determine when the filter should be rebedded.
|alanhanna 0 Posts||
We are on a two hour minimum service call rate.
PS Had your car or truck fixed lately?
|rexmunroe 0 Posts||
I have a residential client that I am trying to come up with a solution to remove boron from her well water. Here is the raw water tests, description of treatment system, and treated water test results:
RAW WATER: ( test results are in mg/l)
Calcium- 1 Flouride- 1.2
Magnesium- < 1 Boron- 3.1
Potassium- 2 Copper- .03
Sodium- 257 Iron- < .05
Carbonate- 20 Manganese- .010
Sulfate- 152 Zinc- .02
Chloride- 2 PH- 9.2
Nitrate- 6.6 TDS- 457 ( field test )
Whole house RO using 3 GE Merlin systems plumbed in parelell. System fills a 2500 gallon storage tank. Water is constantly ozonated in tank. Water supplies house ( plumbing is pex ) and small garden with fruit tree's.
Pressure- Boosted to constant 70 psi before membranes
Flow rate- Constant 6 gpm thru system, with 1.5 gpm to tank, balance to drain.
TREATED WATER TEST RESULTS:
Did not test for any other minerals.
It has been suggested to me to inject caustic soda before the membranes to raise ph to 9.5 to 10 and then the membranes should remove the boron. I have been told that using soda ash to raise ph would ruin the membranes.
This is a system that I service monthly, however If possible I would rather not use caustic soda. I have also explored using selective boron resin but it appears to be very expensive and must be regenerated with caustic/acid. Does anyone have any suggestions?
|bonifaciofer... 0 Posts||
We are a long time subscriber of your magazine. We manufacture coconut shell activated carbon. Just recently, we were faced by a challenge by a potential customer. They had Dieldrin contamination in their waste water at 0.08 to 0.22µm. Which is way beyond the permissible 0.03µm. The volume is 150 liters per second. The turbidity ranges from 0.08 to 0.21NTU, and TDS is around 122.9 to 414mg/L. Can Activated Carbon remove Dieldrin? What will be the life of activated carbon if yes? What other way can dieldrin be removed from water?
Thank you for your kind attention and we look forward to hear from you.
|michaellong 0 Posts||
Andrew's response was excellent. I would like to add just one more minor point: A washing machine doesn't have a "waste" cycle; rather it is a "rinse" cycle. This is exactly what is happening with the drain side of the RO system. I hope that someday people will quit referring to the "reject" stream as "waste" water and start calling it what it is - "rinse" water.
|mikemcgowan 0 Posts||
Sorry I didn’t reply sooner. Thank you for your replies I appreciate your time, opinions, and expertise.
I especially liked your detailed reply and I think this one sentence sums it up, “One shouldn't confuse waste water with wasted water.”
|robbyers 7 Posts||
We just started delivering salt to our customers. I favor the ten bag minimum . We charge $85.00 for ten 50 pound bags delivered to the brine tank.
|richardde young 0 Posts||
Mike, Andrew Christianson's response is dead on.
I have over the years discussed/responded/defended this exact issue of RO "wasted" water using the same points that Andrew has. Andrew has hit it right on the head I have got to say I've never been able to put it in writing as good as he has. Kudos to you Andrew, I would like to use some of what you have written for my responses in the future.
The only thing I add in discussion to the consumer is to stay focused on what we are looking for and that is purified drinking water, now we have to consider the best and most cost effective way of getting it. When you consider the cost of 2 gallons of public utility water that is used to produce 1 gallon of purified RO water we aren't aware of a better solution.
Richard De Young
Advanced Water Solutions
|Russ Knight 0 Posts||
We charge a flat $80.00 per hour residential, $90.00 per hour commercial from the time we leave the shop until we finish the job. Some (most) of our competitors charge lower rates than us, a couple are higher. We arrived at this rate based on our overhead, our desired profit margin, and comparing the quality of our work to the competition. While we feel the quality of our installations and equipment are superior to any of our competitors, we did not want to be branded as the most expensive source for water conditioning in our area.
We have also opened a plumbing and electrical supply retail store which has given our water conditioning business even greater public exposure. We offer relatively inexpensive (995.00 - 1495.00) DIY systems for those so inclined, to more advanced systems that include installation and service contracts. If we can ever get through this political / bureaucratically induced nightmare of an economy, we feel we are positioned to do very well here. Which reminds me to encourage everyone to "tro da bums out."
|robbyers 7 Posts||
Thanks guys, I was pretty sure we were in the same area on service work. We cover a three or four county area that is largely rural but we also have municipal water lines running into areas you would normally not expect to see them. We have hard and also run into black water sulper in this area, we also have problems with water availability. Thak you again for posting a response.
|richardrizzo 0 Posts||
We cover a 100 mile radius from our main office and charge a $50 Diagnostic Fee, which is a visual inspection, plus a before and after water test, then $45 per half hour once we pull out tools to work on equipment.
|charlesthome... 0 Posts||
In the Midwest, City of 21,000, we charge based on man/vehicle cost/hour; establishing an average rate our service call is Labor is $35.00/hour and vehicle is $45/hour = $80/hour with a 2 hour minimum.
|robbyers 7 Posts||
It has been awhile since I jumped on this site. We are presently charging $85.00 for a service call. I have heard anywhere from $60.00 to $105.00 is the going rate. We are located in the North East.
|Jim Wark 8 Posts||
If it is a POU and it uses few gallons a day my two cents worth might make sense. Permeate pumps work well to reduce waste water due to using the back pressure as a driving force. I have found that if someone wants to go green in a POE sytem, we would run waste stream to a stoage tank and tie it into the irrigation system. The other systems tied into other lines are plausible but explaining the waste stream going back into the main supply system can be awkward. Good Luck !!
|andrewchrist... 0 Posts||
I hear this more and more. I don't want to get an RO "because of all that wasted water", etc. The total amount of RO drain water is incredible low compared with the total waste water used on a daily average.
Pushing the water back into service does require a pump to gain enough pressure to over overcome household pressure. Doesn't that require extra energy? The cost goes up due to the additional equipment and that "extra filter' is removed perhaps affecting the water quality. I think there are better ways to look at it.
My point isn't whether the system is good, great or bad. But what is it that people really consider when the word 'wasted' used.
The water in question in the RO process is called concentrate water because the TDS in that water is concentrated due to its removal from the source water and making the permeate water (the water you drink) 'cleaner'.
One shouldn't confused waste water with wasted water.
If I talk about wasted water, I am pointing out that toilet that is constantly running, that dripping faucet, that three-minute pre-shower warm-up, the unnecessary regenerating softener, that garden hose on the lawn that just keeps flowing.
In other words, wasted water is water that is used without purpose, function or positive results. Every drop of water that comes from its source becomes waste water, your showers, dishwasher, every ice cube, etc., but has it become wasted, useless, without purpose or function? Hopefully not.
I don't consider concentrate water as wasted water. It serves a very important purpose and, in my opinion, can be argued to be the most valuable and conservative of all the water that you use on a daily basis. Some RO's concentrate have a far greater ratio (wasted?) than others, so the design of the RO can be considered when selecting equipment.
Two valuable functions are that it washes away the very contaminants that you prefer not to enter your body--pretty important! and far more conservative (and possibly more valuable) than any shower. Also, it greatly prolongs the life of the membrane so that you it can last for years instead of days. Two very important functions, right?
Yes, there is waste water but it is far from being wasted.
There are a few ways to conserve water. One: to use less water to accomplish the same function or Two: use the same water for more than one function. And a third of course is to use less water to accomplish more than one function and so on... Nonetheless, it all becomes waste water. The point is, don't let the waste water become wasted water.
I recommend to those who find this important to take concentrate water and drain it into a container, such as a five gallon jug, and use that water for plants, pets, washing hands, even flushing the toilet, etc. These are techniques you are forced to develop when your source water is rationed, there is a severe shortage or untreated water is grossly unacceptable.
Suddenly the semantics of waste and wasted take on a very different meaning.
|mikemcgowan 0 Posts||
I’m curious if anyone out there has any experience with attempting to create a zero waste residential POU RO. I’ve heard of people using a booster pump to feed the RO and then taking the concentrate line and plumbing it back into the home’s main feed as far upstream from the RO feed as they can. The scenario being if the static pressure in the home is 60 psi and the booster pump feeds the RO at 100psi the drain water will come out at a high enough pressure to overcome the homes 60 and reenter the main feeding the house. This way the few gallons a day of high TDS drain water is theoretically diluted & reused somewhere else like the outside faucet, shower, toilet, etc. I have a client (2 in the family) that would like an RO but doesn’t like the idea of wasting any water. I thought I’d see if anyone had done this successfully before. Thanks, Mike
|Gary Schreib... 0 Posts||
Neither of those are something we would recommend. For too many reasons to list here.
|Taoward Lee 10 Posts||
The conversion of the WAC to the Na form in unnecessary if there is enough NATURAL alkalinity available AND the pH is allowed to be mildly acidic as it exits the WAC column.
For highly alkaline water, you might split-stream the WAC in the Hydrogen form with WAC in the sodium form where the combined stream is in an acceptable pH range. (This way you can convert the WAC to the sodium form using the alkalinity from the water source instead of buying caustic soda.)
|Laurence DAl... 3 Posts||
Have you tried Iron Oxide based media? Arsenic has a high affinity for iron oxide based minerals and can adsorb quickly to the surface of the media.
|Gary Schreib... 0 Posts||
Toward Lee is correct. Not everyone uses WAC resin in the H form. More use it in the Na form which requires both an acid regeneration and a caustic regeneration.
|Gary Schreib... 0 Posts||
I, as an employee of a resin manufacturer, will be happy to share Elution Study protocols. To detailed to put here. Just send me an email requesting the info and I will email it to you. Chris' posting is a "one shoe fits all" idea. I suppose if one chooses those flow rates then have it. Otherwise do an elution study and eliminate call backs because the water is either not soft or taste's salty.