Multi-Purpose Household Biogas System

I saw this on Kickstarter today https://www.kickstarter.com/projects/bio-resy/bio-resy-0?ref=discovery



It looks like a compost bin that makes fuel as well as compost.  

That looks cool.  I keep wondering if I could make biogas work for my homestead.  I don't have large animals so my feed stock would need to be food scraps or imported food scraps.  I'd need to keep it warm so I could put it in the greenhouse (assuming that stays warm).  But could I run the furnace in the house for a week of vacation in January on biogas?  

This does seem like perfectly suited to someone in a warmer climate who cooks with gas or who could convert a scooter.

I wonder how they deal with the scale issue?
"Conventional" digested lore says most households don't create enough biomass to produce a useful amount of gas.

In the kickstarter it lists a Maximum input of 4 gallons of food scraps or 12 gallons of manure PER DAY.  No mention of the minimum.

How does one use biogas?  Does the equipment need to be made special for this kind of fuel?  They had a bike-like thing in the video they were using the fuel for.  This is neat.  How does that work?

I don't know much but I do know enough to be dangerous...  The gas produced is methane which is the same as natural gas.  It's often not as clean as utility produced natural gas so many YouTube videos I've seen have a filter/scrubber to take out some of the impurities.  I wonder how this Bio-Ways one would do that.

So if you have a natural gas stove, it should be able to hook right up to this.  Switching a propane grill or stove over to natural gas is supposedly easy - just changing out a nozzle.

The kickstarter said that you could convert a scooter to run off of it.  I doubt the bike was off-the-shelf.  I'm not sure what kind of bike engine would be needed to be convertible to natural gas.