Revision as of 00:54, 18 May 2025

300 People

For toilet water - we have 4 gallon max per person per day - at 0.5 gpf for liquids.
Shower water goes directly to septic fertigation
Biodigester waste is held for 30 days. 24 people *4 gal = about 100 gpd. The actual solids, if they settle, they stay as long as they like - there is only under a liter of feces per day [2].
It seems that septic tank calculations allow for no retention time, just one day's hold. This makes sense if solids settle on a daily basis, so that discharge water is not too loaded. [3]
Design: send shower and wash sink water directly to septic fertigation. Toilet water goes into digester.
Common figure is 100 liters per person per day [4]

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 *It seems that septic tank calculations allow for no retention time, just one day's hold. This makes sense if solids settle on a daily basis, so that discharge water is not too loaded. [https://www.google.com/search?q=how+many+gallon+septic+tank+for+50+people&sca_esv=6b59915f74dbdb30&sxsrf=AHTn8zrnlydAQDl0VLxWXZcQK1OmQuNxfA%3A1747529064495&ei=aC0paL-HHv_Tp84P0KCY4Q4&ved=0ahUKEwi_2_6I5auNAxX_6ckDHVAQJuwQ4dUDCBA&uact=5&oq=how+many+gallon+septic+tank+for+50+people&gs_lp=Egxnd3Mtd2l6LXNlcnAiKWhvdyBtYW55IGdhbGxvbiBzZXB0aWMgdGFuayBmb3IgNTAgcGVvcGxlSJoJUOQFWKAIcAF4AZABAJgBWaABsQGqAQEyuAEDyAEA-AEBmAIBoAIGwgIKEAAYsAMY1gQYR5gDAIgGAZAGCJIHATGgB1qyBwC4BwDCBwMyLTHIBwQ&sclient=gws-wiz-serp]
 *Design: send shower and wash sink water directly to septic fertigation. Toilet water goes into digester.
+*Common figure is 100 liters per person per day [https://www.blueflamebiodigesters.com/biodigester-septic-tank/?v=a2e1f137298d#:~:text=Population%20(Volume=%20Population%20x%20100liter,Possibility%20of%20future%20expansion]