Environmental assessment of biogas co- or tri-generation units by life cycle analysis methodology

摘要: Abstract A life cycle analysis performed on biogas co- or tri-generation units shows that the environmental impact depends fraction of heat (or cold) used, distance for crops collection, efficiencies unit and NO x emissions. high efficiency ( η el  = 0.4 g  = 0.8) low content (80 mg/N m 3 ) based 20 km collection will save CO 2 emissions act in a sink resulting one very few technologies capable reducing atmospheric concentration.