[also posted in "projects" area -- sorry, not sure which is better...]
I just added a blog post about the conditional permit we received to install this as an experimental septic system on our new house build in a very rural off grid property. It's at our blog BrownKawa.com
It is mainly introducing the concept and the fact that we got a permit; build info and photos will come in a later blog post.
To support others looking to go this route, I recommend googling "peer reviewed research vermifilter" and then follow up by finding references from the bibliographies of the articles you find there. Our permit took 2 years and lots of persistence, patience, and politeness!
We just finished building our vermifilter septic system, and I am sharing in case others are interested.