?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=UJI+AKTIVITAS+BIOSURFAKTAN+DARI+BAKTERI+Serratia+marcescens%0D%0A%0D%0Astrain+MBC+1+PADA+MINYAK+JELANTAH&rft.creator=BERLIANA+DAMAYANTI%2C+1717021039&rft.subject=570+Biologi&rft.description=ABSTRAK%0D%0A%0D%0AUJI+AKTIVITAS+BIOSURFAKTAN+DARI+BAKTERI+Serratia+marcescens%0D%0A%0D%0Astrain+MBC+1+PADA+MINYAK+JELANTAH%0D%0A%0D%0AOleh%0D%0A%0D%0ABERLIANA+DAMAYANTI%0D%0A%0D%0ABerbagai+olahan+pangan+di+Indonesia+diolah+dengan+minyak+goreng+yang+tak+jarang%0D%0Amenyisakan+minyak+jelantah.+Minyak+jelantah+seringkali+dibersihkan+dengan%0D%0Asurfaktan+sintetik+sabun.+Campuran+minyak+dan+sabun+biasanya+dibuang+langsung%0D%0Ake+lingkungan+dan+mengakibatkan+menurunnya+kesuburan+tanah+dan+menghambat%0D%0Aproses+degradasi+oleh+mikroorganisme.+Karena+itu+dibutuhkan+senyawa+alami+yang%0D%0Amampu+melarutkan+minyak+jelantah+yaitu+biosurfaktan.+Salah+satu+bakteri+penghasil%0D%0Abiosurfaktan+yaitu+Serratia+marcescens%2C+bakteri+ini+menghasilkan+biosurfaktan%0D%0Aberupa+Serrawettin.+Penelitian+ini+bertujuan+untuk+mengetahui+aktivitas+optimum%0D%0Abiosurfaktan+bakteri+dari+Serratia+marcescens+strain+MBC+1+pada+berbagai+media%0D%0Adan+pH+yang+berbeda.+Bakteri+ini+ditumbuhkan+di+media+fermentasi+tryptone+water%2C%0D%0Alimbah+cair+jagung+dan+limbah+cair+singkong+dengan+pH+6%2C7+dan+8+untuk+diambil%0D%0Asupernatannya.+Uji+yang+dilakukan+diantaranya+uji+emulsifikasi%2C+oil+displacement%0D%0Adan+drop+collapse.+Pada+uji+drop+collapse+didapatkan+tetesan+datar+di+setiap%0D%0Aperlakuan+uji.+Hasil+indeks+emulsifikasi+tertinggi+didapatkan+pada+media+limbah%0D%0Ajagung+dengan+pH+7+yaitu+sebesar+49.26%25.+Pada+uji+oil+displacement+zona+jernih%0D%0Aterbesar+didapatkan+pada+media+produksi+tryptone+water+dengan+pH+7+yaitu+5.72%0D%0Acm.+Data+yang+didapatkan+dianalisis+menggunakan+uji+non+parametrik+Friedman%0D%0Adilanjutkan+dengan+uji+Bonferroni.+Setelah+dilakukan+uji+analisis+Friedman%0D%0Adidapatkan+bahwa+jenis+media+dan+variasi+pH+yang+digunakan+berpengaruh%0D%0Aterhadap+indeks+emulsi+dan+zona+jernih+yang+terbentuk.+Pada+uji+lanjut+Bonferroni%0D%0Aoil+displacement+test+terdapat+beda+nyata+perlakuan+di+media+tryptone+water+pH+7%0D%0Adengan+akuades+(K-).+Pada+uji+emulsifikasi+didapatkan+beda+nyata+pada+perlakuan%0D%0Adi+limbah+singkong+pH+6+dengan+tween-80+(K%2B).+Dari+hasil+yang+didapatkan%2C%0D%0Aterbukti+bahwa+bakteri+Serratia+marcescens+strain+MBC+1+mampu+menghasilkan%0D%0Abiosurfaktan+yang+berpotensi+dalam+proses+biodegradasi+minyak+jelantah.%0D%0AKata+Kunci%3A+Biosurfaktan%2C+Serratia+marcescens%2C+minyak+jelantah.%0D%0A%0D%0Aiv%0D%0A%0D%0AABSTRACT%0D%0A%0D%0ABIOSURFACTANT+ACTIVITY+TEST+OF+Serratia+marcescens+strain+MBC%0D%0A%0D%0A1+IN+COOKING+OIL%0D%0A%0D%0ABy%0D%0A%0D%0ABERLIANA+DAMAYANTI%0D%0A%0D%0AVarious+foods+in+Indonesia+are+processed+with+cooking+oil+which+often+leaves+used%0D%0Acooking+oil.+Used+cooking+oil+is+often+cleaned+with+synthetic+soap+surfactants.+A%0D%0Amixture+of+oil+and+soap+is+usually+discharged+directly+into+the+environment+and%0D%0Acauses+a+decrease+in+soil+fertility+and+inhibits+the+degradation+process+by%0D%0Amicroorganisms.+Therefore%2C+natural+compounds+are+needed+that+are+able+to+dissolve%0D%0Aused+cooking+oil%2C+namely+biosurfactants.+One+of+the+biosurfactant-producing%0D%0Abacteria+is+Serratia+marcescens%2C+this+bacterium+produces+a+biosurfactant+in+the+form%0D%0Aof+Serrawettin.+This+study+aims+to+determine+the+optimum+activity+of+bacterial%0D%0Abiosurfactant+from+Serratia+marcescens+strain+MBC+1+on+various+media+and%0D%0Adifferent+pH.+These+bacteria+were+grown+in+tryptone+water+fermentation+media%2C%0D%0Acorn+liquid+waste+and+cassava+liquid+waste+with+pH+6.7+and+8+to+take+the%0D%0Asupernatant.+The+tests+carried+out+include+emulsification%2C+oil+displacement+and+drop%0D%0Acollapse+tests.+In+the+drop+collapse+test%2C+flat+drops+were+obtained+in+each+test%0D%0Atreatment.+The+highest+emulsification+index+results+were+obtained+in+corn+waste%0D%0Amedia+with+a+pH+of+7%2C+which+was+49.26%25.+In+the+oil+displacement+test%2C+the+largest%0D%0Aclear+zone+was+found+in+the+production+medium+of+tryptone+water+with+a+pH+of+7%2C%0D%0A%0D%0Awhich+is+5.72+cm.+The+data+obtained+were+analyzed+using+Friedman's+non-%0D%0Aparametric+test+followed+by+Bonferroni's+test.+After+the+Friedman+analysis+test%2C+it%0D%0A%0D%0Awas+found+that+the+type+of+media+and+the+variation+of+pH+used+had+an+effect+on+the%0D%0Aemulsion+index+and+the+clear+zone+formed.+In+the+Bonferroni+oil+displacement+test%0D%0Afurther+test%2C+there+was+a+significant+difference+in+the+treatment+in+tryptone+water+pH%0D%0A7+media+with+distilled+water+(K-).+In+the+emulsification+test%2C+it+was+found+that+there%0D%0Awas+a+significant+difference+in+the+treatment+in+cassava+waste+pH+6+with+tween-80%0D%0A(K%2B).+From+the+results+obtained%2C+it+is+proven+that+the+bacteria+Serratia+marcescens%0D%0Astrain+MBC+1+is+able+to+produce+biosurfactants+that+have+potential+in+the%0D%0Abiodegradation+process+of+used+cooking+oil.%0D%0A%0D%0AKeyword%3A+Biosurfactant%2C+Serratia+marcescens%2C+Used+cooking+oil&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2021&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F61083%2F3%2F1.%2520ABSTRAK%2520-%2520BERLINA.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F61083%2F1%2F2.%2520SKRIPSI%2520FULL%2520-%2520BERLINA.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F61083%2F2%2F3.%2520SKRIPSI%2520FULL%2520TANPA%2520BAB%2520PEMBAHASAN%2520-%2520BERLINA.pdf&rft.identifier=++BERLIANA+DAMAYANTI%2C+1717021039++(2021)+UJI+AKTIVITAS+BIOSURFAKTAN+DARI+BAKTERI+Serratia+marcescens+strain+MBC+1+PADA+MINYAK+JELANTAH.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F61083%2F