CITY FOCUS | PORTO
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Residual biomass and the energy potential of lignins ( core polymers found in plant cell walls ) both offer means of producing energy . Burning lignin-rich residue leftover from the pulping process produces steam which in turn drives a generator . Tree waste from the pulping process is burned in biomass boilers to similarly produce steam and spin a generator . Altri says the energy produced by these methods is sent directly to the grid , cutting into the share of coal-based electricity found in Portugal ’ s energy network .
FEBRUARY 2020