[Ryan]

I’m not sure I would say ADs with ag source materials are less interesting, just that there are additional challenges to achieve a return on investment. Farms in Ontario, on average, tend to be smaller than farms found in other regions of North America, and obviously generate less ag source materials suitable for use in an AD system, making a stand-alone system less economically viable. Supplementing with off farm organic will help increase feedstock volume, as well as provide greater gas production potential than what is typical of ag source materials, but gaining access to a reliable, steady supply can be challenging. Clustering farms together for a single AD is a potential option, but again, the size and number of farms, in addition to the distance between farms presents a different set of challenges, among others.

Ag/farm-based systems do offer some benefits with the regulations around managing digestate as an ag source material vs a non ag source material for beneficial reuse as fertilizer and soil amendment. This can increase to viability of a mixed system, but there are some things that need to be considered such as available land based, storage, transportation, etc.