화학공학소재연구정보센터
Chemical Engineering & Technology, Vol.43, No.10, 1981-1993, 2020
Biogas Plant Upgrade to CO2-Free Technology: A Techno-Economic Case Study
A techno-economic analysis was performed for a biogas plant with in-built algae production. Degradation in the fermenter occurs under mesophilic conditions, to produce 605 Nm(3)t(TS)(-1)of biogas and 343 Nm(3)t(TS)(-1)of methane after 50 days. The biogas was combusted in a combined heat-and-power unit to produce heat and electricity. Cultivation ofChlorella vulgariswas done in co-annular photo-bioreactors, with an annual productivity of 107.5 t. For cultivation, both autotrophic and mixotrophic growth were assumed. Detailed mass and energy balances were done. For both conditions of algae growth, the results are approximately the same after a 30-year payback period.