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K e y w o r d s : Biogas; Biomethane; Biofuel; Emission to the air; Energy Efficiency Economics; Sewage treatment plant; Water scrubber, Biogas treatment. 2/2019 A R C H I T E C T U R E C I V I L E N G I N E E R I N G E N V I R O N M E N T 131 A R C H I T E C T U R E C I V I L E N G I N E E R I N G E N V I R O N M E N T The Si les ian Univers i ty of Technology No. 2/2019 d o i : 1 0 . 2 1 3 0 7 / A C E E 2 0 1 9 0 2 9 J . C i u ł a , K . G a s k a , Ł . I l j u c z o n e k , A . G e n e r o w i c z , V . K o v a l 132 A R C H I T E C T U R E C I V I L E N G I N E E R I N G E N V I R O N M E N T 2/2019

ENERGY EFFICIENCY ECONOMICS OF CONVERSION OF BIOGAS FROM THE FERMENTATION OF SEWAGE SLUDGE TO BIOMETHANE AS A FUEL FOR AUTOMOTIVE VEHICLES