For the small volume I've been doing where I have a septic tank, I empty depleted developer, the used fixer, and a first tank of wash water into a plastic jug. I have another place where I can discard it where it will be treated in a municipal treatment plant.
Based on the research I did on APUG and other sites, I'm not concerned with putting a few rolls worth of developer a week into my septic tank, but would not put the used silver down the drain.
For now I think I'm probably going to store my used chemicals in water bottles and the bring them to the municipal treatment center. Just to be on the safe side, I'll probably pour the wash in the bottle as well. i didn't realize there is a hazardous materials place down the street from where I live, so it won't be too much of a hassle.
Thanks for all the replies,.
I would agree with anyone that has said, DON'T.. DO NOT dump ANY of your photo waste in your septic, period.
Go to a darkroom that is hooked to a sewer line. ..
Kodak in one of its publications states that there is no adverse effect on septic systems from the amateur darkroom. The professional darkroom is another matter.
I'm afraid Kodak's publications no longer make this statement.
Darkroom Design for Amateur Photographers • AK-3 explicitly states the opposite: http://www.kodak.com/global/en/profe...bs/ak3/ak3.pdf
Environmental Guidelines for Amateur Photographers • J-300 is the best Kodak reference I can find on the subject: http://www.kodak.de/ek/uploadedFiles...er/J300ENG.pdf
That being said, I don't think the trace amounts the OP was asking about (in the rinse and wash solutions) are of concern.
one way to reduce the amount of chemicals used is to switch from inversion to rotary processing!This helps your walletand your septic tank or environment.