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Madona T , Naomi and Nur Dias A, Rizki (2008) FERMENTASI AMPAS UBI JALAR MENJADI ASAM SITRAT MENGGUNAKAN METODE ”SURFACE CULTURE”. In: 'Seminar Tugas Akhir S1 Jurusan Teknik Kimia UNDIP 2009', Jurusan Teknik Kimia UNDIP. (Unpublished)

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Asam sitrat rumusnya beda dengan asam askorbat (vitamin C), kalau vitamin C itu rumusnya lebih mirip glukosa. Manusia tidak bisa menghasilkan vitamin C karena ada suatu reaksi yang terputus dimana manusia itu tidak mempunyai enzim L-glunoluase oksidase yang mengoksidasi glukosa menjadi vitamin C. Cara tersebut antara lain dengan penggunaan panas, penghambatan dengan bahan kimia seperti asam sitrat, askorbat ataupun dengan penggunaan belerang dioksida dan sulfit, akan tetapi penggunaan bisulfit untuk makanan dibatasi antara 2000 ppm-3000 ppm (Desrosier, 1988).

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Abstract

Siklus Asam Sitrat

Citrate represent one of very organic sour compound a lot of utilizing in food and beverage industry. Reseach target make citrste by ferment from parsnp jalar dregs at solid semi media with addition variable lock up and the nutrient enchand as wel as to know influne from the ferment. Result of this reseach is expected can give information about parnship jalar exploiting so that can improve added value and asses to utilize parsnip jalar by mikrobioorganisme used is Aspergillus Niger which have been developed in starter with other: dissimilar supporter substance that is: potato dextrose, aquades, bekatul, MgSO4, ammonium nitrate, sour phosphate, this indicator PP. This citrate research used cover temperature operation(30OC), heavy of sample(30gr), ferment time(7 day). The first variable used form of chaff(25%,30%, 35%, 40%, 45%) obstetrically are nutrient(NH4NO3 = 0,25 %, K3PO4 = 0,2 %, MgSO4 = 0,025 %, bekatul= 5%) and this second variable in the form of nutrient(0,5% NH4NO3, 0,2% K3PO4, 0,025% MgSO4, 5% bekatul, 35% chaff ),(0,25% NH4NO3, 0,4% K3PO4, 0,025% MgSO4,5% bekatul, 35% chaff), (0,25% NH4NO3, 0,2% K3PO4, 0,2% MgSO4, 5% bekatul, 35% chaff), (0,25% NH4NO3, 0,2% K3PO4, 0,025% MgSO4, 8% bekatul, 35% chaff), (0,25% NH4NO3, 0,2% K3PO4, 0,025% MgSO4, 5% bekatul, 35% chaff) Pursuant to data analyse, result of chaff addition variable conclude more and more addition lock up hence result of citrate yielded more and more matter this means growth Aspergillus Niger wiil be good progressively ig oxygen in ferment media many progressively. In citrate process ferment making must be done correctly and sterile because having an effect on to growth mikroorganisme. Hence from that, lawful influential in fermentation processmust we check to produce the citrate acid optimal.

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Item Type:Conference or Workshop Item (Paper)
Subjects:T Technology > TP Chemical technology
Divisions:Faculty of Engineering > Department of Chemical Engineering
Faculty of Engineering > Department of Chemical Engineering
ID Code:1515
Deposited By:teknik kimia
Deposited On:28 Oct 2009 15:08
Last Modified:28 Oct 2009 15:08

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