300gallons 4800kwh per year

In terms of energy consumption, the amount of energy required for tilapia production can vary depending on factors such as the type of production system, water quality, and feeding regime. However, on average, it can take around 0.5-1 kWh/kg of tilapia(full) produced.
Effective flesh yield is 350grams from 1kg of full grown fish, after deboning etc. Hence 1kwh/0.35kg = 2.86kwh/kg effective flesh. And about 4kg tomatoes for this same 2.86kwh energy .

Therefore, the energy consumption for producing 15-20 kg of tilapia in 300 gallons of water over an 8-month cycle would be approximately 7.5-20 kWh.
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how much kwh to raise 20c to 30c for 300 gallons of water and keep it there for 24 hours

To raise the temperature of 300 gallons of water from 20°C to 30°C and keep it at that temperature for 24 hours, we need to calculate the total amount of energy required for both heating and maintaining the temperature. The specific heat capacity of water is 4.186 joules per gram per degree Celsius (or 1 BTU per pound per degree Fahrenheit). Therefore, the energy required to heat 300 gallons of water (approximately 1135.6 liters) by 10°C would be:
(1135.6 kg) x (10°C) x (4.186 kJ/kg/°C) = 47,543 kJ
To convert this to kWh, we divide by 3,600 seconds per hour and 1,000 watts per kilowatt, which gives us:
47,543 kJ / (3,600 s/hour x 1,000 W/kW) = 13.2 kWh
So, it would take approximately 13.2 kWh of energy to raise the temperature of 300 gallons of water from 20°C to 30°C and keep it there for 24 hours.
thus 0.55kwh x 365 x24 = 4800kwh per year
13.2 * 240 days over 8 months = 3168kwh /8 months
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how much phosphate in feces vs urine per person

The amount of phosphate in feces and urine can vary depending on several factors, such as diet, age, and health status.

On average, the daily excretion of phosphate in human urine is around 1-2 g per day per person, while the daily excretion of phosphate in human feces is around 0.5-1 g per day per person. This means that more phosphate is excreted in urine compared to feces.

However, it is important to note that the amount of phosphate excreted can vary significantly based on individual factors. For example, individuals with certain medical conditions or dietary habits may excrete higher or lower amounts of phosphate in their feces and urine.

Overall, both urine and feces contain significant amounts of phosphate that can be recovered and recycled for use in agricultural or industrial applications.

how is phosphate extracted from feces. ?

Phosphate can be extracted from feces using various methods, such as composting, anaerobic digestion, and chemical precipitation. The specific method used depends on the type of fecal material being processed and the desired end product.

One common method for extracting phosphate from feces is through composting. During composting, microorganisms break down the organic matter in feces, releasing nutrients such as phosphate in the process. The compost can then be harvested and the phosphate-rich material can be extracted for use as a fertilizer or soil amendment.

Another method for extracting phosphate from feces is through chemical precipitation. In this process, the feces are mixed with a chemical such as calcium hydroxide or magnesium oxide, which reacts with the phosphate in the feces to form a solid precipitate. The precipitate can then be separated from the liquid and processed further to extract the phosphate.

Finally, phosphate can also be extracted from feces through anaerobic digestion. During this process, the feces are placed in an oxygen-free environment, where anaerobic bacteria break down the organic matter and release nutrients such as phosphate in the process. The resulting digestate can then be further processed to extract the phosphate.

Overall, there are several methods for extracting phosphate from feces, and the specific method used depends on the type of fecal material being processed and the desired end product.