Azolla and Duckweed Calculations - Revision history

Eric: Added some more links under the "Internal Links" section

2021-03-20T01:28:07Z

Added some more links under the "Internal Links" section

← Older revision		Revision as of 01:28, 20 March 2021
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	=Internal Links=		=Internal Links=
	*[[Azolla]]		*[[Azolla]]
			*[[Azollaponics]]
	*[[Duckweed]]		*[[Duckweed]]

	=External Links=		=External Links=
	*		*

Eric: Finished the page out

2021-03-20T01:27:44Z

Finished the page out

← Older revision		Revision as of 01:27, 20 March 2021
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	The downside with a very "tight" nutrient cycle involving humans is the risk of retaining in the system: pharmaceuticals, hormones, microbes/other pathogens. The larger the number of people using this toilet, the higher the likelihood that somebody will be on some antidepressant or birth control pill. Possible solution: dry all waste and burn it. Or grow [[cattails]] on the wastewater, dry and burn them. Collect urine with sawdust, dry it, burn it. Collect [[humanure]], dry it, burn it. Use the resulting ashes to fertilize the duckweed/azolla pond. Some nitrogen would be lost but that's OK, it's a minor loss. Urine sawdust could be continuously aerated to keep it dry (to prevent bad smells and nitrous oxide). My suggestion: use human urine and [[humanure]] in other ways (e.g. fertilize trees, biomass plants). --Rasmus (talk) 22:32, 13 April 2016 (CEST)		The downside with a very "tight" nutrient cycle involving humans is the risk of retaining in the system: pharmaceuticals, hormones, microbes/other pathogens. The larger the number of people using this toilet, the higher the likelihood that somebody will be on some antidepressant or birth control pill. Possible solution: dry all waste and burn it. Or grow [[cattails]] on the wastewater, dry and burn them. Collect urine with sawdust, dry it, burn it. Collect [[humanure]], dry it, burn it. Use the resulting ashes to fertilize the duckweed/azolla pond. Some nitrogen would be lost but that's OK, it's a minor loss. Urine sawdust could be continuously aerated to keep it dry (to prevent bad smells and nitrous oxide). My suggestion: use human urine and [[humanure]] in other ways (e.g. fertilize trees, biomass plants). --Rasmus (talk) 22:32, 13 April 2016 (CEST)

	=~~=Related Pages=~~=		=Internal Links=
	*[[Azolla]] ~~and~~ [[Duckweed]]		*[[Azolla]]
			*[[Duckweed]]

			=External Links=
			*

Rasmus: + image, + int. links

2016-07-22T19:33:10Z

+ image, + int. links

← Older revision		Revision as of 19:33, 22 July 2016
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			[[File:Azolla filiculoides and L.minor.jpg\|500px\|thumb\|right\|An example of co-culture of Azolla and [[duckweed]]: "Azolla filiculoides and L.minor" by Mygaia at English Wikipedia (T.M.McKenzie)]]

	=Introduction=		=Introduction=
	Consistent with OSE's integrated design approach, we are developing an integrated house and Greenhouse where a separating toilet reclaimed urine to produce duckweed ~~andazola~~. This duckweed in a Solo may be fed to fish in an aquaponics system thereby combining wastewater treatment and food production.		Consistent with OSE's integrated design approach, we are developing an integrated house and Greenhouse where a separating toilet reclaimed urine to produce [[duckweed]] and [[azola]]. This duckweed in a Solo may be fed to fish in an [[aquaponics]] system, thereby combining wastewater treatment and food production.

	To this end it is important to produce and document design calculations which correlate average human waste production with a required duckweed and azolla system size.		To this end, it is important to produce and document design calculations which correlate average human waste production with a required [[duckweed]] and [[azolla]] system size.

	Further, this must consider pond design and existing nitrogen loading from fish if one is to produce an integrated system.		Further, this must consider pond design and existing nitrogen loading from fish if one is to produce an integrated system.
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	=Calculations=		=Calculations=
	==Nitrogen-Based First Principle Calculations==		==Nitrogen-Based First Principle Calculations==
	*Percentage of protein (nitrogen) in azolla - 25-35% - [https://www.milkwood.net/2012/08/06/azolla-water-fern-as-protein-rich-animal-feed/]		*Percentage of protein (nitrogen) in [[azolla]] - 25-35% - [https://www.milkwood.net/2012/08/06/azolla-water-fern-as-protein-rich-animal-feed/ see link]
	*Growth rate of duckweed per square meter of surface area - 5 grams dry weight - [~~http://opensourceecology.org/wiki/~~Duckweed]		*Growth rate of [[duckweed]] per square meter of surface area - 5 grams dry weight - see [[Duckweed\|duckweed page]]
	*Growth rate of azolla for the same -		*Growth rate of [[azolla]] for the same -
	*Average grams ammonia produced per person per day - a person needs 2/grams nitrogen, so assume that a person eliminates approximately the same per day.		*Average grams ammonia produced per person per day - a person needs 2/grams nitrogen, so assume that a person eliminates approximately the same per day.
	*Square meters of azolla required to treat an average person's nitrogen loading - 2 square meters roughly.		*Square meters of azolla required to treat an average person's nitrogen loading - 2 square meters roughly.
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	=Critique Worth Noting=		=Critique Worth Noting=
	The downside with a very "tight" nutrient cycle involving humans is the risk of retaining in the system: pharmaceuticals, hormones, microbes/other pathogens. The larger the number of people using this toilet, the higher the likelihood that somebody will be on some antidepressant or birth control pill. Possible solution: dry all waste and burn it. Collect urine with sawdust, dry it, burn it. Collect humanure, dry it, burn it. Use the resulting ashes to fertilize the ~~duckeweed~~/azolla pond. Some nitrogen would be lost but that's OK, it's ~~minimal~~. Urine sawdust could be continuously aerated to keep it dry. My suggestion: use human urine and humanure in other ways (e.g. fertilize trees, biomass plants). --Rasmus (talk) 22:32, 13 April 2016 (CEST)		The downside with a very "tight" nutrient cycle involving humans is the risk of retaining in the system: pharmaceuticals, hormones, microbes/other pathogens. The larger the number of people using this toilet, the higher the likelihood that somebody will be on some antidepressant or birth control pill. Possible solution: dry all waste and burn it. Or grow [[cattails]] on the wastewater, dry and burn them. Collect urine with sawdust, dry it, burn it. Collect [[humanure]], dry it, burn it. Use the resulting ashes to fertilize the duckweed/azolla pond. Some nitrogen would be lost but that's OK, it's a minor loss. Urine sawdust could be continuously aerated to keep it dry (to prevent bad smells and nitrous oxide). My suggestion: use human urine and [[humanure]] in other ways (e.g. fertilize trees, biomass plants). --Rasmus (talk) 22:32, 13 April 2016 (CEST)

			==Related Pages==
			*[[Azolla]] and [[Duckweed]]

Marcin: /* Calculations */

2016-04-13T21:17:13Z

Calculations

← Older revision		Revision as of 21:17, 13 April 2016
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	*Existing greenhouse - has 224 square feet of trays for growing on the walls - about 20 sq meters.		*Existing greenhouse - has 224 square feet of trays for growing on the walls - about 20 sq meters.
	*say 2 people weigh 300 lb and fish mass is 300 lb - assuming they produce similar amounts of protein - we would need 8 sq meters of azolla to handle the nitrogen loading.		*say 2 people weigh 300 lb and fish mass is 300 lb - assuming they produce similar amounts of protein - we would need 8 sq meters of azolla to handle the nitrogen loading.

			=Critique Worth Noting=
			The downside with a very "tight" nutrient cycle involving humans is the risk of retaining in the system: pharmaceuticals, hormones, microbes/other pathogens. The larger the number of people using this toilet, the higher the likelihood that somebody will be on some antidepressant or birth control pill. Possible solution: dry all waste and burn it. Collect urine with sawdust, dry it, burn it. Collect humanure, dry it, burn it. Use the resulting ashes to fertilize the duckeweed/azolla pond. Some nitrogen would be lost but that's OK, it's minimal. Urine sawdust could be continuously aerated to keep it dry. My suggestion: use human urine and humanure in other ways (e.g. fertilize trees, biomass plants). --Rasmus (talk) 22:32, 13 April 2016 (CEST)

Rasmus: /* Nitrogen-Based First Principle Calculations */ typo fixed

2016-04-13T20:24:24Z

Nitrogen-Based First Principle Calculations: typo fixed

← Older revision		Revision as of 20:24, 13 April 2016
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	*Average grams ammonia produced per person per day - a person needs 2/grams nitrogen, so assume that a person eliminates approximately the same per day.		*Average grams ammonia produced per person per day - a person needs 2/grams nitrogen, so assume that a person eliminates approximately the same per day.
	*Square meters of azolla required to treat an average person's nitrogen loading - 2 square meters roughly.		*Square meters of azolla required to treat an average person's nitrogen loading - 2 square meters roughly.
	*~~Doluckweed~~ area required for the same -		*Duckweed area required for the same -
	*Existing greenhouse - has 224 square feet of trays for growing on the walls - about 20 sq meters.		*Existing greenhouse - has 224 square feet of trays for growing on the walls - about 20 sq meters.
	*say 2 people weigh 300 lb and fish mass is 300 lb - assuming they produce similar amounts of protein - we would need 8 sq meters of azolla to handle the nitrogen loading.		*say 2 people weigh 300 lb and fish mass is 300 lb - assuming they produce similar amounts of protein - we would need 8 sq meters of azolla to handle the nitrogen loading.

Marcin: /* Nitrogen-Based First Principle Calculations */

2016-04-12T22:30:36Z