From our research, we found following assumptions for Chinese fixed-dome biodigester:
- 55 kg of dung requires 8 m^3 digester, which potentially produces about 0.45m^3 of gas
- .45 kg cow manure produces 1 ft³ of gas (.03 m³ gas) at 28 degrees C. This feeds about 4-6 people in India
- There are about 4-6 people in every household.
- There are about 20-25 households in the community Sabana Grande
1/0.03=33.30.45 x 33.3 = 15kg ( for 1m^3gas, 15kg of cow manure is needed.)
55kg/8=6.88 ( 6.88kg dung requires 1m^3 digester.)
0.03 x 20 = 0.6m³
0.03 x 25 = 0.75m³
About 0.6-0.75m³ of gas needed in the community
15 x 0.6 = 9kg
15 x 0.75 = 11.25kg
About 9 - 11.25kg of dung required per day
9/6.88 = 1.3m³
11.25/6.88 = 1.64m³
About 1.3 - 1.63 m³ of biodigester needed.
From our research, we found following assumptions for plastic model biodigester:
55kg/8=6.88 ( 6.88kg dung requires 1m^3 digester.)
0.03 x 20 = 0.6m³
0.03 x 25 = 0.75m³
About 0.6-0.75m³ of gas needed in the community
15 x 0.6 = 9kg
15 x 0.75 = 11.25kg
About 9 - 11.25kg of dung required per day
9/6.88 = 1.3m³
11.25/6.88 = 1.64m³
About 1.3 - 1.63 m³ of biodigester needed.
From our research, we found following assumptions for plastic model biodigester:
Digester Dimensions of Existing Model in La Casita Solar
Volume= 8 m cubed
r= 1.6 m
d= 3.25 m
h= 1.5 m
Digester Dimensions of Our Model, tentatively
Volume= 2 m cubed
Curved Surface Area= 3 m squared
r= .68 m
d= 1.36 m
h= .62 m
Costs of materials
Cement: $3 per m cubed
Bricks and Mortar: $2 per m cubed
Stone (piedra): <$2 per m cubed
Anecdotal:
-Plan for approx. $150 for materials, per meter squared
-Cement to cover 3 m squared SA of dome should cost $105
r= 1.6 m
d= 3.25 m
h= 1.5 m
Digester Dimensions of Our Model, tentatively
Volume= 2 m cubed
Curved Surface Area= 3 m squared
r= .68 m
d= 1.36 m
h= .62 m
Costs of materials
Cement: $3 per m cubed
Bricks and Mortar: $2 per m cubed
Stone (piedra): <$2 per m cubed
Anecdotal:
-Plan for approx. $150 for materials, per meter squared
-Cement to cover 3 m squared SA of dome should cost $105
Some important considers for location:
-Proximity to stable source of manure
-Distance from highly populated areas (scent)
-Distance from owner/operator's dwelling
-Rockiness of the land (avoid overly challenging installation process)
-Sun/shade (avg. temp in Nicaragua: 77-81 F)
Sources
http://www.adelaide.edu.au/biogas/poly_digester/aguilar/sld004.htm- Que es el precio de billete por autobus?
- Que tipo de molino tiene? Sabes para que los trabajadores en los molinos hacen con los restos de ______ (el sobrante o extra)?
- Cuantas vacas hay en la comunidad de el Frayle? en la Palmera? En colonia?
- A que distancia es la latina en relación de la casa de una familia?
- Cuanto cuestan el ladrillo, el cemente, la arena en tres metros cubicos (cuadrados)?
- Cuanto costó para fabricar la planta de biogas en La casita solar?
- Cuantas personas-- en una comunidad de ciento personas--usan gas propano?
- Qual tamaño del tanque de gas propano usan las familias normalmente?
- Cuanto cuesta el gas propano en general, talvez para un tanque?
- Por cuantas horas las familias cocinan?
- Cual tipo y tamaño de estufa tienen las familias en general?
- Cuanto estiércol se usan para la planta de biogas en La casita solar? Cuantas vacas hay para la produccion de biogas?
- Podriamos saber para cuanto las familias quieren vender estiércol de sus vacas y de la gente?
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