▁( by ▁weight ). ▁Once ▁the ▁oil ▁was ▁extracted , ▁it ▁under w ent ▁conventional ▁processing ▁into ▁b iod ies el . ▁It ▁is ▁estimated ▁that ▁finished ▁b iod ies el ▁could ▁be ▁produced ▁for ▁about ▁one ▁US ▁doll ar ▁per ▁gall on . ▁Further , ▁it ▁was ▁reported ▁that ▁" the ▁technique ▁is ▁not ▁difficult " ▁and ▁that ▁" there ▁is ▁so ▁much ▁coffee ▁around ▁that ▁several ▁hundred ▁million ▁gall ons ▁of ▁b iod ies el ▁could ▁potentially ▁be ▁made ▁ann ually ." ▁ ▁However , ▁even ▁if ▁all ▁the ▁coffee ▁grounds ▁in ▁the ▁world ▁were ▁used ▁to ▁make ▁fuel , ▁the ▁amount ▁produced ▁would ▁be ▁less ▁than ▁ 1 ▁percent ▁of ▁the ▁dies el ▁used ▁in ▁the ▁United ▁States ▁ann ually . ▁" It ▁won ’ t ▁solve ▁the ▁world ’ s ▁energy ▁problem ," ▁Dr . ▁Mis ra ▁said ▁of ▁his ▁work . ▁ ▁Ex otic ▁sources ▁Rec ently , ▁all ig ator ▁fat ▁was ▁identified ▁as ▁a ▁source ▁to ▁produce ▁b iod ies el . ▁Every ▁year , ▁about ▁ 1 5 ▁million ▁pounds ▁of ▁all ig ator ▁fat ▁are ▁dis posed ▁of ▁in ▁land fill s ▁as ▁a ▁waste ▁by product ▁of ▁the ▁all ig ator ▁meat ▁and ▁skin ▁industry . ▁Studies ▁have ▁shown ▁that ▁b iod ies el ▁produced ▁from ▁all ig ator ▁fat ▁is ▁similar ▁in ▁composition ▁to ▁b iod ies el ▁created ▁from ▁so y beans , ▁and ▁is ▁che aper ▁to ▁ref ine ▁since ▁it ▁is ▁primarily ▁a ▁waste ▁product . ▁ ▁B iod