I would be happy to help out with the ILFI discussions regarding methane and biomass. I think this is an area of the standard that needs a different lens. I have worked on multiple Living Building projects including the Bullitt Center, Kendeda Building, and the PAE Living Building. All three of these buildings were designed with compost toilet systems. The PAE Living Building has a urine diversion system that can generate fertilizer.
https://www.pae-engineers.com/projects/pae-portland-living-building
https://www.pae-engineers.com/projects/kendeda-building
https://www.pae-engineers.com/projects/bullitt-center
