What are you doing with your degreaser remnants? Where are you taking it? I am now using Zep’s Heavy Duty Citrus Degreaser.
Let it run on the ground…
I was using the park tool citrus degreaser. It is biodegradable. 
I dumped some (a small amount from my chain cleaner) in the bushes and it killed them. Nice! I am sure it biodegraded after it killed everything around it though.
I have no real answer to your question.
Drink it, add a shot of Vodka, 1/2 tomato juice and a dash of Tobasco.
Great for the environment, everyone is a winner.
According to the product sheet it can be cleaned up with water. In the small quantities you are using that is what they probably intend for you to do.
From the product sheet:
“If you’re looking for industrial-strength cleaning, get it from this organic, non-petroleum cleaner made with renewable resources. It uses the
power of citrus and soy to cut through tough grease on equipment
and machinery. Just spray on and wipe or rinse off.”
http://www.zepprofessional.com/pdf/onesheets/R077.pdf
According to the MSDS it must be disposed of according to local laws but I suspect that would be for a large spill though
http://www.zepprofessional.com/msds/eng/R077_ENG_USA.pdf
Hope this helps
jaretj
Weed killer, fuel for your Prius. Put it in a sealable can and drop off at your local garage. They usually have a company that comes and gets it. Local recyclable drop off ?
What are you doing with your degreaser remnants? Where are you taking it? I am now using Zep’s Heavy Duty Citrus Degreaser.
You guys are missing the point. Even if a degreaser is “biodegradable” what it cleaned off the part may or may not be. It still has to be treated as HASMAT.
Most local car dealers, auto parts stores, garages, and even commercial oil change locations like Jiffy Lube (bite your tongue) will take it as waste, usually for free.