Is it possible to develop film at home without harsh chemicals?

I would love to create a darkroom and process my own black and white photos at home.  But I worry about the chemicals.  Even with good ventilation, I would still need to dispose of the chemicals once used and I suspect they aren't exactly septic system or greywater safe.

There goes my dream of processing my own film...

... or does it?

I stumbled on this today, she's developing film with mint tea, vitamin C tablets and some baking soda.  Pretty neat stuff.



So, is it possible to create a darkroom set up at home that doesn't rely on harsh chemicals?  

develops black & white film using instant coffee and washing soda to replace the nasty chemicals found in traditional developing agents.