The Casa Juliana Dry
Composting Toilet – A Water-Saving, Odorless, Indoor Composting System
A Seminar with a Hands-On Workshop Option Presented by Andy McDonald
December 15, 2012
Seminar: 9:00am – 12:00pm. Registration Fee: $20
Hands-On Workshop: 1:00pm – 5:00pm Registration Fee:
Location: Franklin County Cooperative Extension Office, 101
Lakeview Court, Frankfort, KY 40601
This workshop will detail the design, construction, and
operation of a composting toilet developed and used in the 1990’s by David
Omick and the residents of Casa Juliana, an intentional community in South
Texas that was focused on developing appropriate technologies and serving the
local immigrant community.
The workshop includes a morning seminar and an optional
hands-on workshop in the afternoon, during which participants will assist in
the assembly of a Casa Juliana Composting Toilet. The hands-on workshop is limited
to 5 participants.
The Casa Juliana Composting Toilet uses a well-ventilated,
two-chamber composting system with a waterproof box and a urine drain to remove
all liquid from the toilet. The system has proven to be convenient and odorless
and to require a minimum of maintenance.
There are many varieties of composting toilets available,
ranging from very simple do-it-yourself designs to commercial models that cost
thousands of dollars. The Casa Juliana design incorporates some of the benefits
of the commercial models (e.g. good ventilation, effective composting in-situ,
durable materials) with a do-it-yourself design that can be built using common
building materials, at a cost of around $500.
This workshop will begin with a review of composting toilet
systems and the basic principles of composting. We will discuss the key
features of composting toilet design and how those are embodied in the Casa
Juliana model. We will then have a detailed discussion of the design,
construction, operation, and maintenance of the Casa Juliana Composting Toilet.
We will also discuss potential variations to the original design, including
alternate building materials.
This workshop is being held in conjunction with the
construction of a Casa Juliana Composting Toilet. A partially-assembled version
of the unit will be available during the workshop. After the morning seminar, up
to 5 people may participate in a hands-on workshop assembling the toilet. The hands-on workshop will be
held at the home of John Harrod, where the toilet is being installed, located
about 15 miles from the Franklin County Extension Office in Owen County.
Each participant will receive a detailed technical paper
that explains the design and construction of the Casa Juliana Composting
Toilet, published by Casa Juliana in 1997.
At the end of the workshop participants will have an
understanding of how composting works, what options are available for
composting toilet systems, and the key features that make the Casa Juliana
Composting Toilet an effective design.
About the Presenter: Andy McDonald was a member of the Casa
Juliana community from 1995 – 1999 and co-authored the technical paper on the
Casa Juliana Composting Toilet with David Omick. He has 20 years of experience
using various models of composting toilets and used the Casa Juliana model on a
regular basis for four years. Andy works for ASPI and is the Director of the Kentucky
Solar Partnership. He lives with his wife and daughter on a small farm in
TO REGISTER: Contact Andy McDonald at email@example.com or 1-888-576-6527.
To download technical plans for the composting toilet featured in this workshop, click here:
The Casa Juliana Composting Toilet (1997) by David Omick and Andy McDonald. (7.5 MB)