i didn't recommend mixing the developer and blix together. the devices i mentioned ( electrolytic and ion transfer ) do not work
Originally Posted by laroygreen
with developers but fixers ... you would still have to find a way to dispose of the spent desilvered blix, as well as your developers.
how about calling your local authorities and finding out what they suggest you do with them?
Seems very doable but does that sound like good advice (I use my chemicals to the max, and store chemistry in the freezer for months until I am sure I can't get anything more out of it - and it has worked well so far)?
i sell silver magnet (and i explain how to use them) i also sell test strips, trickle tanks &c
feel free to contact me if you have any questions about them ...
Last edited by jnanian; 01-27-2013 at 02:00 PM. Click to view previous post history.
Originally Posted by Worker 11811
great to hear it is still working for you randy
the OP is using color chemistry ... and i have a feeling disposal is a little different ...
But the question remains, aside of your wallet, what would best environmentally: extracting silver partially and dump the rest of fixer, or give it to recovery service that retracts silver more efficiently?
However this needs the availability of such recovery service locally. And this is not what this thread is about.
Originally Posted by AgX
Maybe we could reanimate the thoughts brought up in this old thread (especially post #57) and come up with workable ideas (even kits?) that allow at least splitting of effluent beyond silver recovery.
Last edited by AgX; 01-27-2013 at 04:11 PM. Click to view previous post history.
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If you look at post #56 of that thread you'll see that I hinted at inceneration of those filters (at least the charcoal ones). I don't see another solution. But then again one needs a (municipal?) service that takes care of such, but at least that stuff is off the sewage system. And with incineration I had in mind hazardous waste inceneration. This takes place at higher temperature (better cracking up of molecules) and better filtration.
So that term "disposal" as indicated in the title of this thread may be ambiguous.
Concerning that silver, you are right claiming the money for that silver out of your fixer. My remark was directed at the effeciancy of home de-silvering compared to a commercial business under the aspect of being most ecological.
Last edited by AgX; 01-27-2013 at 07:52 PM. Click to view previous post history.
The OP didn't mention the total quantities s/he is dealing with. That makes a difference from the point of view of local effluent regulations. Whatever treatment those regs suggest should be followed - not because they are the most factually or chemically correct, but because one therebye avoids a fine or imprisonment.
The oft quoted idea of mixing the blix and developer probably comes from the home-use version of the Cibachrome chemicals where this was designed in to the chemistry. It was not the same for the commercial version of the "same" process, from what I remember. In any case, unless instructions for the chemical products one is using specifically recommend this, it's probably wise to not try it out randomly.
The liquids are mostly water so, after de-silvering the blix if possible, can an animal and pet-safe evaporation of the water take place? Probably outdoors, away from home ventilation, not drinkable by passing creatures. That leaves you with a very small amount of solid(-ish) residue to deal with.
i think you might be onto something there AgX ...
Originally Posted by AgX
maybe filtering out the bad stuff would be useful, if the tailings were held on site,
so the "good stuff" in the fluid is separate from the "bad stuff" in the fluid
so maybe the ph was neutralized a bit or so if the bad stuff and the good stuff were mixed together,
there wouldn't be "problems" but i think in the end, both things ( the good and the bad )
or the one thing ( goodbad ) would both have to be disposed of in a sensible manner ...
i remember reading years ago about a magical powder that people sprinkle in their photochemicals
and it somehow absorbed all the liquids and turned everything into a benign powder
( or at least a powder that could be collected and disposed of easier than a fluid )
i wish i could remember what it was ...
unfortunately henry ( a few posts up ) touches upon something a lot of people who use goodbad stuff often think
... ( antifreeze, used motor oil, lubricants solvents &c ) that just dumping it is sensible ...
because it is their property and their little bit doesn't matter and the laws are dumb and too "green"
( freaking liberals ! ) and it really doesn't matter anyways because it will take sooo long for me to pollute my own land ...
or the sewer system ( or my septic ) can handle the goodbad ( or just bad ) stuff i might dump down the drain ...
mainly, because it is a pain in the neck to deal with any of this stuff ...
its too bad we can't just take this stuff right back to the places we bought it from !
or that magical powder would make things much easier ...
Last edited by jnanian; 01-28-2013 at 09:27 AM. Click to view previous post history.
You are refering to what is called superabsorber.
Originally Posted by jnanian
It only fixes a fluid. The volume even rises (by the compact-volume of the absober). Furthermore it hampers recycling compared to the original fluid. The advantage would only be in cases a fluid could not be stored and handled safely in a container.
One of the pitfalls, here, is that we need to consider the amount of chemicals that are being dumped.
Even when I am in full production mode, I rarely use more than a gallon of stock developer in a week. I often replenish and reuse XTOL until it's exhausted. I recycle fixer until it's used up. Then I get the silver out before turning it in. The only things I am really dumping down the drain are stop bath, hypo clearing agent and Photo-Flo. For printing, the only other thing I use is Dektol. Again, I use it all up before disposing.
Even in busy times, I probably dump less than five gallons of working strength chemical solutions down the drain during a week. Compared to the crap that goes down the drain on a daily basis, that's like spit in the ocean. But for the silver, most well managed municipal sewer treatment plants are well able to destroy most photo chemicals that get flushed down the drain, even at 100 times the quantities that I dispose.
I occasionally develop color film. Except for fixer, I have zero worries about dumping all my used chemistry down the drain at working dilution. (Plus plenty of water to dilute and wash it down.) In the amounts I use, I don't even think it would be noticed, much less cause a problem.
Now, if you are a commercial photo lab dumping 100 gallons of chemicals down the sewer ever week, THAT could be a problem! You had better have a plan to dispose of your chemicals properly!
But, in the quantities we usually dispose of, the average home photographer has nothing to worry about unless there are special circumstances.