Waste biomass livestock

The ultimate sources of nitrogen and phosphorus causing cultural eutrophication are industrial N2 fixation, fossil-fuel burning, and the mining of phosphorite. The nitrogen and phosphorus used as fertilizer have three possible 6tes they either enter the food chain, become part of the soil, or are washed off the land by stormwater runoff The nutrients that enter the food chain eventually end up as either animal wastes or dead biomass. Animal wastes include human sewage, livestock manure, and pet feces. Sanitary... 

Cameroon, 1,148.77 PJ of energy, equivalent to 41,325 million kWh of electricity could be harvested annually from the theoretical harvestable biomass wastes arising from agricultural waste, forest residue, and livestock dung. 

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