This book describes the potential of ferrocement as a construction material; gives details of how septic tanks and aquaprivy waste treatment and soil disposal units are designed and constructed; and gives details of other low-cost sanitation options.
Published by Practical Action Simon Watt December 1984 108 pp.
Septic Tanks and Aquaprivies from Ferrocement 
This book describes the potential of ferrocement as a construction material; gives details of how septic tanks and aquaprivy waste treatment and soil disposal units are designed and constructed; and gives details of other low-cost sanitation options.