Biodigester Sizing: Difference between revisions
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*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 [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=how+many+liters+of+feces+per+person+per+day&btnK=Google+Search&oq=how+to+configure+nvidia+geforce+gtx+1650+super+on+linux+mint&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoOCAAQ6gIQtAIQmgEQ5QI6DgguELEDEMcBEKMCEJMCOggILhDHARCvAToLCC4QsQMQxwEQowI6CAgAELEDEIMBOggILhCxAxCDAToFCAAQsQM6AggAOgQIABAKOgYIABAWEB46CAghEBYQHRAeOgcIIRAKEKABUMsQWOmzAWD8tAFoBnAAeACAAeQGiAGhS5IBDTExLjQ3LjMuMi42LTGYAQCgAQGqAQdnd3Mtd2l6sAEG&sclient=psy-ab&ved=0ahUKEwiqz4DcvLnsAhUQLKwKHUdJBLcQ4dUDCAk&uact=5]. | *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 [https://www.google.com/search?sxsrf=ALeKk026QG9BbsZl0rNsBS9KmerMgczY_w%3A1602863734253&source=hp&ei=dsKJX6q8DJDYsAXHkpG4Cw&q=how+many+liters+of+feces+per+person+per+day&btnK=Google+Search&oq=how+to+configure+nvidia+geforce+gtx+1650+super+on+linux+mint&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoOCAAQ6gIQtAIQmgEQ5QI6DgguELEDEMcBEKMCEJMCOggILhDHARCvAToLCC4QsQMQxwEQowI6CAgAELEDEIMBOggILhCxAxCDAToFCAAQsQM6AggAOgQIABAKOgYIABAWEB46CAghEBYQHRAeOgcIIRAKEKABUMsQWOmzAWD8tAFoBnAAeACAAeQGiAGhS5IBDTExLjQ3LjMuMi42LTGYAQCgAQGqAQdnd3Mtd2l6sAEG&sclient=psy-ab&ved=0ahUKEwiqz4DcvLnsAhUQLKwKHUdJBLcQ4dUDCAk&uact=5]. | ||
*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] | *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. | |||
Revision as of 00:50, 18 May 2025
300 People
- About 7 cubic meters for 300 people boarding school in the tropics - [1]
24 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.