Chemist

Filtration systems 20 years ago, it was very difficult to get any information at all for design of an standard type system, more less an efficient system. They are more readily available now, and least books on theory, one still has to turn it into a tactical application.

First you would have to layout some parameters these list are only vague, they would have to be more defined..

Product?

What you want done with the product? e.i., polish water, extract components. An example, milk byproducts are being separated almost totally.

Volume or flow rate of your permeate?

These would help in specifying your membranes such as MWCO

For my next suggestion, your location will also help. When I was designing and build filtration systems, I aligned myself with an area distributor of the membranes, one that does more that just sell membranes, but she had also worked in the design of it. It was very helpful.

p911

This was a typo

one still has to turn it into a tactical application.

tactical could suffice or be included, but I meant practical......sorry

p911

Type "turnkey ro plant" into any browser.

Maybe they will do the work for you.

I think he was looking for design aspects with out being pressured from sales. Which may not be bad. It gives one knowledge what questions to ask, or challenging salesmen from blow smoke up his blind side.

This would be a good first step.

Be prepared.......

I have notice, and I for one thank you.

Looking at his response and seemingly difficulty in English ^{(I shouldn't talk, and I'm an American)} when I did my first Ultrafiltration unit that the company I worked for had already sold, The company design was from a competitor that was out in the field that they copied. They knew nothing about the process, And I was to design one, with process manuals, operation of events, trouble shooting guide, start-up/run procedures, shut-down procedures, cleaning and inspection.

I ask them "Can I see the scope?"

Their reply "huh"

My response "What did you sell them?"

their response "A UF"

My response "What flux rate are we shooting for?"

their response "Whats a flux rate?"

I learned it through hard knocks and actually learn more from our lead Field-man who installs and does field services on what he did on previous start-ups and issues he ran across., Then I figured out the reasoning and shared it with him.

I'll tell you a little secret about Filtration,

"The first key is control? " Protect those membranes, make them work for you.

"The second key is chemistry? some cleaning agents reacts to the process agents and can foul a membrane is less than 8 hours, that is irreversible. And you will not get an accurate response from the customer on what they did, "You not only have to ask the people operating the machine, but the people in the whole process leading up to it. Thats cleaning, maintenance and operators as well as general laborers." As well as the people that supply the cleaning agents for these units, and you have to read between the lines of what they say, because they are protecting there blind side. These are usually smaller operators, I never had problems with the more professional ones such as Eco-lab.

When I see someone that struggling, Lets just say, I'm paying it forward.

p911

Which coast ? East/ West? The price would depend on it.

Which coast is lower? East or west? Wait a minute.................They're both at sea level, so, I don't see what it matters.

He wanted the lower coast, but there isn't one.

The coast of the Dead Sea is the lowest coast.

Perfect place for an RO plant, too.

Not necessarily. The Dead Sea's salinity is so high that the economics of RO operation might weigh against it.

Don't they use an evaporative process for desalination at the Dead Sea?

I wonder what happened to essam abaza This party is going on without him

One aspect is the quality of infeed water characteristiecs. lowest possible TDS values, strict BOD control of inputs.

Based on TDS levels your flow rate can improve.

Muti[double or triple] time passage of R.O reject is another option to improve recovery.

You got to choose memebrane type as per TDS Values of infeed water to ensure membrane performance.

I would also like to make a correction of your wordings. It should have been COST Instead of COAST.

s.udhayamarthandan: where were you so long. Now we all know it is "cost" not coast. All the time we wasted going from coast to coast and not xconsidering our cost.

Hi Duncan,

Nice of meeting you in CR4. It should have been a localized pronounciation for cost it seems. the OP is yet to be clear about his details.

dear freind first of all you need to check ur water impurities level,i mean to say mineral strength tds ,tss etc, then what level of de-mineralization you required,R.O plants of different type working on same law,but may be ur quality standards be achieved only by some filteration type technique,so carry on and list out those.che05_@yahoo.com