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Icon_missing_medium markwiddison 0 Posts
11/18/2010

WTO Board / used regenerated mixed bed resin

We are looking for 20 to 30 cu/ft of used mixed bed regenerated resin
Thanks Mark us water consultants
 
Icon_missing_medium stevewithers 0 Posts
11/18/2010

WTO Board / Removal of THMs

Jim, Yes it is city water (a very large city) and the city is aware of it. The customer doesn't trust the city to solve the problem to his satisfaction. Steve
 
Icon_missing_medium Jim Wark 8 Posts
11/17/2010

WTO Board / Rain Water Collection.

Moe,
The main reason I like to incorporate ozone is for the reason you have just listed. Iron regardless of levels, can be easily oxidized with ozone. Also, the iron would foul your UV bulb quite quickly. A small chemical feeder if residual is required can still be use and at a much lower feed rate level. The other reason I like ozone is because it can be easily adjusted for seasonal or source changes.
I would though warn you..... Be sure that you have a vent system that goes outside or a ozone destruct if overfed. Ozone put in well houses or garages without good ventilation or venting have been damaged by oxidizing objects in the garage or well house such as bicycles, tools etc...
IT is rare but I have personally seen it, so just get someone who truly kmows ozone systems. If you can't find someone you are comfortable with get hold of me.
 
Laurence%201998 Laurence DAl... 4 Posts
11/16/2010

WTO Board / Removal of THMs

Trihalomethane removal with Activated Carbon:
We can size your adsorber with the total flowrate, specific THMs and concentrations. Contact us privately.
 
Icon_missing_medium Jim Wark 8 Posts
11/16/2010

WTO Board / Removal of THMs

The answer to this could be quite simple or quite complex. My first question would be, is it a city water supply or well water at site supply? If it is well water self provided, other disinfection could be used and the THM issue might disappear.
If it is city supplied water, does the city know of the issue? If so, are they planning to do anything like change to chloramine based disinfection to lower the THM levels?
Usually if the THM's are that high (level not indicated here) the government will require reduction by the water provider. If not, many capable companies advertising here can provide equipment for reduction to acceptable levels.
Regarding your EBCT, the answer is almost always yes. No matter what treatment method is used, the usual rule is longer contact, better reduction. In your case with a 1/2 inch service line, I can't imagine that the flow would be higher than 5-10 gpm, unless it was a high pressure line from a direct pump feed. A simple bucket test will give the approximate GPM and then the level of contaminants to be removed, will assist equipment sizing and type recommendations.
 
Icon_missing_medium stevewithers 0 Posts
11/16/2010

WTO Board / Removal of THMs

Need to remove THMs to four drinking fountains & two low flow kitchen faucets in an airport control tower. Service line is 1/2". Other removal not needed. Is EBCT a critical item? Would appreciate suggestions please.
 
Icon_missing_medium robbyers 7 Posts
11/15/2010

WTO Board / Rain Water Collection.

My first thoughts are going to be with everything the birds have left on the roof that is going to be in the water supply. Is this a basement cistern or a separate tank? If you use your supply tank as a Retention Tank, you may end up with a very dirty tank over time. I would consider installing a standard chemical feed Chlorination System with a 120 gallon retention tank and a one or 1.5 cube carbon filter with an automatic backwashing valve. The carbon may also help a little with the asphalt shingle's leaving a little petroleum in the water. That is more of a concern in warmer climates, but should not be ignored. From there a point of use R.O. would be a nice polish to this science project. Tell me more about the well with very little water in it. If this is O.K. water, you can put in a low water recovery system.
 
Icon_missing_medium kengurr 0 Posts
11/15/2010

WTO Board / Rain Water Collection.

Agreed --- where did the softener come into the mix?? Not for rainwater. Lots of guidelines on the net for this stuff. Just google it. Carribbean and Oz are leaders in this. Have a first rain diverter pipe to divert the first 10-20 gallons of each rain storm. Good 25 -1 micron filtration, activated carbon and UV and you have good potable water. If residual chlorine count is in local health regs -- you will need to add that too. To achieve perfection -- the POU RO.
 
Laurence%201998 Laurence DAl... 4 Posts
11/15/2010

WTO Board / Rain Water Collection.

I suggest contacting a construction company in Bermuda and asking them how they build the roofs of their limestone houses which are all a rain catchment on every house. There is no treatment of their rainwater. The rain water is soft and you can feel the difference in your hair like it has been conditioned.
 
Icon_missing_medium Jim Wark 8 Posts
11/14/2010

WTO Board / Rain Water Collection.

PS. If collecting rainwater why a water softener? Is it just for use when the well is used? Most rainwater is naturally very soft and might have a low PH which might be more likely needing equipment..... Just a thought. Or after thought....................................................
 
Icon_missing_medium Jim Wark 8 Posts
11/14/2010

WTO Board / Rain Water Collection.

Moe,
Would consider using ozone in the system since it oxidizes and is bacteriocidal. Will help kill any unwanted bugs and is less reliant of good water like a UV. The RO if used could also be done with a post UV if they wanted added (although likely not required) disinfection. The thing that you will need is a good clarifying filtration unit after the system before entering the house again. If there is some requirement for measurable residual, you could use a inexpensive feeder. I have done a few of these in Washington State and if you need more info you can email me via heading.
 
Icon_missing_medium Ray McConnell 0 Posts
11/13/2010

WTO Board / Filox system barely functioning

Nick, Shocking the well may have caused more problems in this instance. I trust you flushed the well completely before running any water through the treatment system. Shocking a well with that much iron will oxidize much of the iron and may have caused the buildup on the inlet of the valve if well was not flushed properly. Shocking a well is at best a very temporary cure to any water problem because of the volumes of water in a well. Generally shocking a well only treats the water in the drop drop. Is there a water softener? If so iron may be bleeding from it also.
A valve rebuild (it sounds like yours is a fleck valve) would basically consist of replacing the main piston and seals. Also soaking the valve, cleaning and flushing the inside ports will help. Make sure the eductor/injector ports are cleaned. You may be able to salvage the Filox by simply taking the head off, take the tank outside and flush the media completely with the garden hose. If this is an Air Injection System as you stated than adding the bleach is redundant as this is simply another means to oxidize. I would suggest taking a water sample (before the system) and getting a thorough water analysis from a lab. NOT from a water treatment company. An independent water lab can test for TOC's ( total organic carbons) to determine if there are any organics in your water that may be causing bacterial iron.
Good luck,
Ray
 
Icon_missing_medium Lisa W. 0 Posts
11/11/2010

WTO Board / radiation release at Knoll's Atomic lab brings new meaning to 'Drums Along the Mohawk' ;-}

Clever!

I'm not sure its catching on, unless you are a fan of ice cream in upstate NY though...
 
Icon_missing_medium timothy devorak 0 Posts
11/11/2010

WTO Board / Serratia marcescens

About ten years back, we had this same problem at several customers homes. We also, spent a large amount of time and money trying to get the necessary answers. We applied a U/V system to the well water and then, suggested an air purifiction system that would produce Ozone. That has solved the staining problems in all of the homes it was applied. Initially, in order to keep it a generic approach, we suggested that the customer purchase the air filtration system from any selected source or big box store. As long as it produced Ozone, we were sure it would eliminate the staining and it has worked 100% of the time with very little maintenence. Now, for our retail dealer network, we have a great source of air filters with Ozone production specific to this and other airborn bacteria.
 
Icon_missing_medium bryanzetlen 0 Posts
11/10/2010

WTO Board / radiation release at Knoll's Atomic lab brings new meaning to 'Drums Along the Mohawk' ;-}

radiation release at Knoll's Atomic lab brings new meaning to 'Drums Along the Mohawk' ;-}
 
Icon_missing_medium peterde dios 0 Posts
11/09/2010

WTO Board / recovery of PEG

if NF can be used for PEG recovery what parameters from the sample solution do i need to analyze? i wanted to pursue using NF and i plan to have the solution analyzed soon. your help will be appreciated.
 
Icon_missing_medium howardkanitz 0 Posts
11/09/2010

WTO Board / recovery of PEG

Larry: I was advised by a chemical engineer that r/o membranes soaked for 24 hours in a brine solution would effectively separate propylene glycol from the dilute. Have you ever heard of this? If you know a viable method for separting PG from its dilute I would be interested. We recover as much of the glycol we remove from hydronic systems as we can (without being able to separate out the water).
 
Laurence%201998 Laurence DAl... 4 Posts
11/08/2010

WTO Board / Fundamentals of Sand Filter Design

Thanks to all for the valuable input. I even got charts e-mailed to me and contact by a company in Florida. I am familiar with backwash flow rates for GAC beds but not filter sand & gravel. Now I know.
 
Icon_missing_medium nickchris 0 Posts
11/08/2010

WTO Board / Filox system barely functioning

Sorry, here it is. AI25:
 
Icon_missing_medium nickchris 0 Posts
11/08/2010

WTO Board / Filox system barely functioning

FOLLOW UP:
I added chlorine to my pre-treatment and it has eliminated the iron smell. Not sure if this fixed the iron bacteria or the clear water iron. I am backwashing almost every day and at least every two even during low use periods. I agree that there is other stuff clogged down in there and I'll pull the head,empty the tank and take a look.
-Is it possible I can 'clean' the Filox vs. putting new media in it? How would I do this? A cubic foot of Filox isn't the cheapest stuff in the world and shipping on top of it adds insult to injury! Wich I could find a local supplier of the stuff.
Note that there was no 'bed' material (gravel, garnet or otherwise) - only the Filox. Here is the system:
-How can I tell how much pressure my pump is generating? I can tell you when I am backwashing and the pump kicks in, the needle moves up to about 50-60 psi on the pressure gauge.
-Somone mentioned to me that bacterial iron should be knocked out after I shocked it with bleach but I read somewhere it could come back and that chlorine in the well is not the best thing for your water pump (corrosion).
How do I rebuild the head aside from the piston and spacers? Doesn't seem to be many more moving parts than that and it's only a year and a half old.
 
Icon_missing_medium Rex Johnson 6 Posts
11/07/2010

WTO Board / Serratia marcescens

Lawrence and Carl - I hear what you are saying but I must gently disagree with your thoughts herein.
Lawrence - if we wanted chlorine inside the home then why bother with carbon? If you felt as if this was the method to employ then you shoud put the carbon filter into bypass and flush the toilet (and just the toilet) until you get a positive reaction for chlorine in the water in the bowl. Then you have to go back to the system and place it into service once again. Seems like a lot of work to me.
Carl - Your suggestion that these tablets will greatly accelerate the decomposition of the flappers is not what I believe to be entirely substantiated. Yes, there will be an increase of flapper care, but in my mind this is a minor consideration given the alternatives. Especially since it will take years and years for this event to produce negative results. And since most folks will not necessarily refresh their tablets on a strict timeline there is even less of an issue. In addition, and more importantly, studies have shown that the levels of chlorine produced by most of these tablets is not all that much greater than treated city water in the first place. Again, these results will vary depending on consumption patterns. While the tablets are by no means benign to the harware of the commode they will not destroy it overnight. I would think that if this problem were that profound no one would ever use them in the first place and that the drumbeat from all concerned would reach extensive volumes. I honestly respect your beliefs however I also feel they are somewhat misguided.
Cordially
Rex Johnson
American Star Water
 
Icon_missing_medium carlsmith 0 Posts
11/06/2010

WTO Board / Serratia marcescens

A chlorine disinfectant tablet in the water closet of the toliler will help for the toilet but not if it spread to the shower or sinks in the bathroom."

Not an especially good idea. This will cause rapid decay of the material that the flush valve flapper is made of. Not only will the toilet owner spend more on toilet flappers, but leaking will occur causing water waste and therefor waste of the consumables in the water treatment system.
 
Icon_missing_medium davidh 0 Posts
11/05/2010

WTO Board / Filox system barely functioning

Is this clear water iron? How many gallons of water is used a day? When you shocked the well did you by-pass the equipment?
 
Laurence%201998 Laurence DAl... 4 Posts
11/04/2010

WTO Board / Fundamentals of Sand Filter Design

We have an application for sand pressure filters as pretreatment for Activated Carbon Adsorption system. Flow 517 GPM. Adsorbing Petroleum Hydrocarbons. Service flow rate 12 gpm/sq.ft. We are going to use 3 84" diameter sand filters. Would the following be acceptable for the layers of sand and gravel?:
Bottom Layer: combination of 1/2" x 1/4" and 1/4" x 1/8" Gravel
Third Layer: #8-12 Garnet
Second Layer: #30-40 Garnet
Top Layer: Filter Sand 0.45-0.55
Question 2: We can supply treated backwash water from two of the 84" diameter sand filters while the third is backwashed. What backwash flowrate and % bed expansion do we need for a sand filter for this type of duty?
 
Icon_missing_medium Ray McConnell 0 Posts
11/03/2010

WTO Board / Filox system barely functioning

Nick, I would agree with Dave that it is time to rebed the system and completely clean if not REBUILD the valve. Air injection filter systems require backwashing on a daily basis. This is necessary to prevent the buildup of oxidized iron within the media tank. If the air injection valve is on the inlet line to the system than this would explain the buildup of oxidized iron in the inlet side of the system. If so check for iron buildup in the line coming into the system. This is an extreme amount of iron for this application.
Also check the pressure from your jet pump. Even though you may be getting sufficient flow (10gpm) it takes a considerable amount of pressure (30+ psi consistently) to effectively backwash this type filter system. Quite often "Jet Pumps" (above ground well pumps) DO NOT build up sufficient "HEAD Pressure" to properly backwash the media and problems such as this happen in a very short time. I would also agree that Garnet would be better as the underbedding material.
Good Luck, Ray