- Treatment The United Stand folks in Northern California have put togeth_er a number of low-flow greywater designs from the experiences in those parts. These two designs, made from (you guesseµ it) tar-covered 5 5-gallon drums treat 20 to 5 0 gallons of greywater per day. The mini-septic tank is really a 1 fancier, 100-gallon sedimentation tank. The economy model design shown for a leach line uses a "V" made from lx6 redwood or cedar instead of plastic or tile pipe. Rule of thumb is one or one-and-one-half feet of leach line for every gallon of water disposed of per d'ay. If you need more, add more. See United Stand Privy Booklet for more details. When you're on a sewer and reusing the greywater by choice, thisJittle plumbing hookup from the-Farallones House is useful. When the valve is closed, all sewage goes directly into the sewer. When it's open, all drains into the greywater holding ta:nk unless it is full, in which case the water backs up and flows out the sewer. No toilets, please! - TB December 1977 RAIN Page 7 , ,.. . RESOURCES Rural Wastewater Disposal Alternatives, Sept., 197 7, free from: State Water Resources Conttol Board P.O. Box 100 , Sacramento,' CA 95801 • This is the OAT report. It's a bargain-free, too! THE best resource currently available on on-site sewage, compost toilets, greywater, current research, legislation, on-site management, educational programs- you name it. For the price, you get thrown in pit ·privy, Farallones privy, and drum privy plans and designs for several greywater systems. Highly recommended for anyone interested in real alternatives to central sewers. Grey Water Use in the Home Garden, 1977. 25f/ from: Fai.-allones Urban House 1516 Fifth Street Berkeley, CA 94710 A brief but concise booklet packed with practical answers to questions about possible hazards of greywater use in gardens and best methods for its use. Expansion of material excerpted in RAIN (April, 1977). A technical bulletin will be available next spring covering plumbing modifications and practical techniques for reusing wastewater. Above Ground Vse of Greywater, ($2); Drum P~ivy Guidelines, ($1.25), from: - · Peter Warshall Box 42, Elm Road Bolinas, CA 94924 The bureaucratic hurdles tQe OAT 1report had to go through held it up for six months, and there was some question if important parts would be omitted. Peter went ahead and revised his two papers and made them available separately. They're excellent summaries of the state of the art in both areas, with more ill'-;lstrations than the OAT report. Thanks, Peter. Small Scale Waste Management Project, Publications available from: 1 Agriculture Hall University of Wisconsin Madison, WI 53706 Detailed technical studies of bacterial and viral contents of wastewater, soil clogging, nutrient removal by soils, etc. Write for full publications listL Recent papers by Robert Siegrist (see Journal of Envir_onmental Health, July-Aug. 1977) conclude that elimination of the garbage grinder and toilet wastes could yield simplified wastewater treatment including surfac•e disposal and possibly outside reuse of the greywater as well as conserve water and return nutrients to the soil. \ Manua/-of Greywater Treatment Practice, J. T. Winneberger, 1974, $10 from: Ann Arbor Science Publishers, Inc.· P.O. Box 1425 Ann Arbor, MI 48106 and Septic Tank Practices, Peter Warshall, 1976, $3 from: Box 42, Elm Road Bolinas, CA 94924 We've reviewed both these resources before (Rainbook, p. 194) _but both are valuable resources for any on-site sewage treatment design. Warshall focuses on small and simple systems, Winneberger on polh,ition content of greywa_ter and solid engineering data for typical hou'sehold application. ~ ~
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