painting ink treatment 1

[extassi]

Hello there
I am a fresh engineer at working at a paper fabric. We have problem with waste ink (water based organic ink) which is washed out from printing presses everytime we need to change color. At present we dry the water and give out the dried solid waste as special waste.This process is very expensive. I was thinking of catalytic oxidation to replace this process. Any suggestions ideas aire welcome.
Thank you
extassi

 

[m777182]

In deinking it is possible to use activated hydrogen peroxide. For each particular process tests should be performed to optimize activation and stabilisation of H2O2 and thus increase the effectivity and reduce costs on the other side.
M777182

 

[bimr]

I have yet to come across an application where it is economical to use catalytic oxidation.

Make sure you fully evaluate this process before you proceed. The chemical operating costs for treatment are very expensive.

 

[oxilume]

Extassi,

BIMR is right. I sold, rented and/or operated advanced oxidation systems using all of the known methods;
(1) Ozone + H2O2
(2) H2O2 + Fe (Fenton's reagent)
(3) Ozone + UV Light
(4) H2O2 + UV Light
(5) H2O2 + Ozone
(6) H2O2 + Bleach
(7) UV Light + TiO2
(8) H202 + Pt Catalyst

m777182 stated that you should try activated hydrogen peroxide. Here is a simple test to try and see if hydroxyl radicals or oxygen radicals will decompose the organic pigments within your stream.

Don't be fooled by the term activated hydrogen peroxide. Why do you think H2O2 is packaged in dark brown containers. UV light decomposes or "activates" H2O2. However, the reaction tends to favor decomposition into water and oxygen.

For a simple test to activate the H2O2 you will need a platinum catalyst. It is commerically available and on most supermarket shelves as a contact lense cleaner case/vial.

Place your colored water into the contact lense vial.
Add 1 to 2 ml of H2O2.
Cover the vial with the top that has the catalyst attached to it.
Watch for a visible change of color.

Now if this works, then contact a major water treatment chemical salesperson (GE/Betz, Nalco, Ashland Chemical) for bulk delivery of 30% or 50% H2O2. They will quote a delivered per pound price. Have the chemical salesperson in your area conduct a bench top test. Ask for a quote with an ROI! This is done at no charge. How I know this is I sold water treatment chemicals for Nalco and Ashland Chemical.

IF the economics fit, then you will need a catalyst.

Now you need to purchase an inexpensive catalyst substrate. That is simple. Contact Advanced Catalyst Technologies of Knoxville, Tennesse. They make Bar-B-Que and wood stove catalyst. Ask for Tracy. Don't be fooled by the fact that they manufacture Bar-B-Que and wood stove catalyst. The owner was the chief research scientist for the largest catalyst supplier to Oil & Gas Refineries.

If the H2O2 and catalyst doesn't work, I can guarantee 100% color removal with a system I recently invented. As I stated in the beginning I sold, rented and operated all the known advanced oxidation systems. However, the current system I use is patent pending.

Keep in touch and let me know how the tests turn out.

 

[extassi]

Hi
Thanx for the replies, oxilume i have done some tests using catalyst and h2o2 and the results are pretty good(clear condensate). The only problem is that i have to maintain the bed temperature above 450 °C for the combustion of organics in the wastewater and its costing lots of energy. I used flocculants to thicken the wastewater and this concentrated waste works perfectly fine but then i have a problem with the decanted water,which is clear from particles but is colored.
regards
extassi

 

[oxilume]

Dear extassi,

I may have a simple solution for you. Do you have a source of waste heat at your facility (i.e. boiler exhaust, flue gas).

If not then I have another solution for you that will guarantee 100% destruction of organics and allow you to recycle water.

see:

http://www.oxilume.com

 

[m777182]

Hello Oxilume
I am glad to meet somebody with a lot of experience at using H2O2 for oxidation purposes. By saying activated peroxide I had in mind a transformation of (relatively unreactive)H2O2 or HOO- or its radical into much more reactive singlet oxygen releasing specia. I admit that from the terminological viewpoit use of "activated H2O2" was not correct. Anyway, a singlet oxygen has much lower activation energy compared to H2O2 so it reacts faster and at lower temperature.
To your list you could perhaps add a system H2O2 + el. current.
Regards
M777182

 

[extassi]

Hello Oxilume
Yes waste heat can be obtained from a boiler. The paint waste also contains inorganic waste like binders etc.
Regards
extassi

 

[oxilume]

moltenmetal,

I have sold water treatment chemicals for the two largest water treatment companies in the world. Second, both Calgon Carbon & Trojan UV market what I would call "low" intensity UV light systems. In addition, please attend an EPA wastewater treatment course. Listen to the operators that have a UV system installed in which the bulbs are enclosed in a quartz housing, then immersed in water. After you have to take an operator to the emergency room for running a broken quartz tube through his hand, you would look for another system. If you can't find one, you would invent one.

In my post,
"m777182 stated that you should try activated hydrogen peroxide. Here is a simple test to try and see if hydroxyl radicals or oxygen radicals will decompose the organic pigments within your stream"

I was doing nothing more than if I was conducting a site survey. This is a simple GO or NO GO test for H2O2 and catalyst. I sold H2O2 by the truckload when I worked for the water treatment chemical companies.

All of my customers are current worldclass manufacturing facilities.



Todd

http://www.oxilume.com

 

[moltenmetal]

Oxilume:

I have no intention to get into a p*ssing match with you, but I too have a fair bit of experience in the area of advanced oxidation water treatment systems. I know nothing about your own proprietary technology and can't comment on it, but I did work for Solarchem, which was later acquired by Calgon Carbon (long after I left the company). While I was there I did literally hundreds of bench- and pilot-scale tests as well as over 15 full-scale treatment system design/fabrications ranging from thousand gallon batch systems to systems treating continuously at hundreds of gallons per minute- for the same type of clients as you've served.

Contrary to your claim, Calgon's Rayox advanced oxidation water treatment systems are high intensity UV/peroxide and UV/catalyst/peroxide systems based around proprietary medium-pressure high watt-density UV lamps. These systems are NOT low UV intensity systems based around low-pressure mercury arc lamps. Trojan and Calgon do also sell UV disinfection systems, some of which are high intensity and some of which are low intensity. As you're no doubt aware, disinfection takes considerably lower doses of UV energy per unit volume of water treated than any of the photochemical oxidation methods.

Calgon's oxidation group (i.e. both Solarchem and Peroxidation Systems, both of which Calgon acquired) have the largest installed base of advanced oxidation water treatment equipment in the world. In my time with Solarchem, we were never made aware of a single injury from one of our lamps, nor of the in-process failure of a single quartz sleeve. UV/peroxide treatment, with or without the addition of homogeneous catalysts, is a demonstrated, reliable treatment technology. But its efficacy for extassi's wastewater can only be proven or disproven by proper bench testing by qualified people.

I've never seen anyone use a heterogeneous supported platinum oxidation catalyst for chemical oxidation water treatment using hydrogen peroxide. The hydroxyl radicals are so short-lived that most supported catalyst systems merely decompose peroxide unproductively to oxygen and water. There isn't time for the radicals to diffuse away from the surface and do chemistry in the bulk of the fluid. Homogeneous iron-catalyzed oxidation using hydrogen peroxide (Fenton's reaction) is quite common, and doesn't suffer from the diffusional limitations that a heterogeneous catalyst would suffer from. I doubt your proposed field test would tell extassi much.

Again, I recommend to the original poster (extassi) to take this to the pros (including oxilume, or not) rather than trying to carry out development experiments yourself.

 

[oxilume]

Moltenmetal,

Thanks for your comments. I built and operated the first "known" advanced oxidation system for treating washwater from barges carrying drill cuttings and drilling fluids.

Since then I have made leaps and bounds with respect to a high intensity UV light system. I cannot go into details over an unsecured net since it is patent pending.

I would be more than happy to email you a video of one of the systems in operation. You can find my email on my website:

http://www.oxilume.com

I will require a mutual two-way non-disclosure agreement. To protect your IP and my IP.

First and foremost, none of my technologies require the use of:
(1) a traditional oxidant such as H2O2, bleach, etc. or
(2) a catalyst, or
(3) an ozone generator

Also, the out of wall power vs. useful wave energy into the fluid to be treated is far greater than medium pressure mercury vapor lamps.

Please note that I used "wave energy" and not "UV light."



Todd

http://www.oxilume.com

 

[radwaste]

When you say giving out the dried solids as special waste, do you mean you are packaging the dried ink solids at your site and paying a waste company to pick up the waste and treat or dispose of it? If the solid dried ink contains no regulated waste constituents it may be considered non-hazardous waste by RCRA,EPA, and DOT. From my experience in the waste industry, most dried ink is considered a non-regulated waste.

Take a sample of the dried ink waste to a lab and request a TCLP analysis.(Toxic Characteristic Leaching Procedure). Here is a link listing the TCLP limits.

http://www.palabs.com/gfx/pdf/tclp.pdf

Based upon concentrations of the TCLP constituents and guidelines set forth in 40 CFR 261.4, the solid waste samples can be deemed hazardous or non-hazardous.