?url_ver=Z39.88-2004&rft_id=1757011017&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PEMANFAATAN+ENZIM+LIPASE+YANG+DIHASILKAN+OLEH+ISOLAT+BAKTERI+Pseudomonas+sp.+DARI+TANAH+TERCEMAR+SEBAGAI+KATALIS+REAKSI+TRANSESTERIFIKASI+DALAM+PRODUKSI+BIODIESEL&rft.creator=Grace+Sondang+Pretti%2C+1757011017&rft.subject=540+Kimia+dan+ilmu+yang+berhubungan&rft.description=Penggunaan+BBM+yang+meningkat+pesat+menyebabkan+ketergantungan+BBM+masih+tinggi+dan+perlu+dikurangi.+Biofuel+atau+Bahan+Bakar+Nabati+(BBN)+telah+menjadi+salah+satu+prioritas+dalam+pengembangan+energi+terbarukan.+Biodiesel+dapat+dihasilkan+melalui+proses+transesterifikasi+minyak+nabati+atau+lemak+hewani%2C+yaitu+dengan+mengubah+gliserida+menjadi+metil+ester+dan+gliserol.+Pada+penelitian+ini%2C+transesterifikasi+minyak+kelapa+menggunakan+enzim+lipase+yang+diproduksi+dari+bakteri+Pseudomonas+sp.+yang+diisolasi+dari+tanah%2C+sebagai+katalis.+Bakteri+Pseudomonas+sp.+tumbuh+optimum+pada+jam+ke-18+dan+pH+7+dengan+aktivitas+unit+sebesar+63%2C2+U%2FmL.+Enzim+lipase+yang+telah+dimurnikan+memiliki+aktivitas+spesifik+sebesar+43%2C161+U%2Fmg+dengan+kemurnian+7%2C5+kali+dibandingkan+dengan+ekstrak+kasar+enzim.+Enzim+lipase+murni+mempunyai+aktivitas+optimum+pada+pH+7%2C+suhu+40+%C2%B0C%2C+dan+waktu+inkubasi+selama+120+menit.+Proses+transesterifikasi+menggunakan+minyak+kelapa+terhadap+metanol+dengan+perbandingan+molar+1%3A4%2C+1%3A5%2C+dan+1%3A6%2C+dan+produk+dianalisis+menggunakan+GC-MS+untuk+mengkonfirmasi+campuran+metil+ester+sebagai+produk+utama+reaksi+transesterifikasi.+Nilai+densitas+dan+viskositas+dari+produk+juga+diukur.%0D%0A%0D%0AKata+kunci%3A+Pseudomonas+sp.%2C+enzim+lipase%2C+transesterifikasi+dan+biodiesel.%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0AABSTRACT%0D%0A%0D%0AThe+rapidly+increasing+use+of+fuel+causes+dependence+on+fossil+fuel+to+remain+high+and+to+reduce.+This+dependence%2C+biofuel+has+become+one+of+the+priorities+in+the+development+of+renewable+energy.+Biodiesel+can+be+produced+through+a+transesterification+of+vegetable+oils+or+animal+fats%2C+throught+wich+the+glycerides+in+the+raw+material+are+converted+into+methyl+esters+and+glycerol+as+side+product.+In+this+study%2C+transesterification+of+coconut+oil+was+investigated+using+lipase+enzyme+produced+from+the+bacterium+Pseudomonas+sp.+isolated+from+the+ground%2C+as+catalyst.+The+experimental+results+indicate+that+Pseudomonas+sp.+reach+optimum+growth+at+18+hours+and+pH+7+with+unit+activity+of+63.2+U%2FmL.+The+purified+lipase+enzyme+has+a+specific+activity+of+43.161+U%2Fmg+with+a+purity+of+7.5+times+compared+to+that+of+the+crude+extract+of+the+enzyme.+Pure+lipase+enzyme+has+optimum+activity+at+pH+7%2C+temperature+40+%C2%B0C%2C+and+incubation+time+of+120+minutes.+The+transesterification+experiments+were+conducted+with+coconut+oil+to+methanol+a+molar+ratio+of+1%3A4%2C+1%3A5%2C+and+1%3A6%2C+and+the+products+were+analyzed+using+GC-MS+to+confirm+the+formation+methyl+esters.+Density+and+viscosity+of+the+products+were+also+measured.%0D%0A%0D%0AKeywords%3A+Pseudomonas+sp.%2C+lipase+enzyme%2C+transesterification+and+biodiesel.&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2022-03-04&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F59171%2F1%2FABSTAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F59171%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F59171%2F3%2FSKRIPSI%2520TANPA%2520PEMBAHASAN.pdf&rft.identifier=++Grace+Sondang+Pretti%2C+1757011017++(2022)+PEMANFAATAN+ENZIM+LIPASE+YANG+DIHASILKAN+OLEH+ISOLAT+BAKTERI+Pseudomonas+sp.+DARI+TANAH+TERCEMAR+SEBAGAI+KATALIS+REAKSI+TRANSESTERIFIKASI+DALAM+PRODUKSI+BIODIESEL.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F59171%2F