Deddy Kurniawan Wikanta
Jurusan Teknik Kimia PSD III, Fakultas Teknik, UNDIP, Jl.Prof.Sudharto,S.H Tembalang, Semarang 50275

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Journal : METANA

REKAYASA BIOKONVERSI LIMBAH CAIR INDUSTRI PANGAN MENJADI PLASTIK BIODEGRADABLE DENGAN MENGGUNAKAN LUMPUR AKTIF

METANA Volume 5 Nomor 2 Desember 2007
Publisher : METANA

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Abstract

Abstract Plastics waste has a negative effect on our environment. one effort to solve a  problem exerted in plastic waste is by making a degradable plastic material. Polihidroksialkanoat (PHA) is one of biodegradable plastic material which is include in the polyester group. PHA can be completely degraded and has  similar properties. with conventional plastic. The usage of liquid food industry waste is a good alternative for the production of PHA, since liquid waste of food industry comprise of organics substance such as C, H, O, N and  S. The production of Polihidroksialkanoat (PHA) from liquid waste of flour industry, wasconducted in a of sequencing batch reactor (SBR).The objectives  of this research are to study the effect of batch time in one cycle of sequencing batch reactor(SBR), to compare between short and ordinary cycle in SBR system to PHA accumulation and kind of PHA, to study optimum condition of producing PHA. The first experimen was done In time of less than 12 hours by using filling time  variable and ratio of duration of Aerob and anaerob process. The constand conditions were ambient temperature and neutral pH (at the begining). The results shows that at running with time ratio of aerob:anaerob was 6:3 hours and a  same duration of  feeding, the highest average PHA content was got at the run when filling step is in six hours anaerob with aerob breaking time. The feeding duration  also influence the PHA formation. the short feeding duration yielded the highest average PHA content. An average PHA 0.1838 g/gsel was yielded at two hours feeding duration   Key Words :biodegradable:plastic:waste    

PEMODELAN TERMODINAMIKA STEAM REFORMER UNTUK PRODUKSI GAS H2 MENGGUNAKAN GAS ALTERNATIF HASIL PEMBAKARAN COKES

METANA Vol 6, No 02 (2009): Volume 06, Nomor 2, Desember Tahun 2009
Publisher : METANA

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Abstract Most of H2 gas industry produce its product from natural gas by reforming. Availability of natural gas stay no longer. One of alternative substitute gas is flue gas from cokes. The problem is how to model thermodynamically the reformer so that it operates as same in order compare with using natural gas. For this reason it needs to be simulated thermodynamic model to know the process tendency to succeed. This research is done in 2 step, namely : thermodynamic modelling and simulation. The result give recommendation that flue gas from cokes can be used as gas substitute to feed reformer. Keywords : reformer; thermodynamic

PENGEMBANGAN PROSES THERMOKIMIA UNTUK PENINGKATAN KONVERSI ASAM LEMAK MELALUI INTERFACIAL ACTIVATION LIPASE BUAH SEGAR KELAPA SAWIT DENGAN TUNING UP MENGGUNAKAN GELOMBANG MIKRO

METANA Vol 8, No 01 (2012): Juli
Publisher : METANA

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Abstract

Nowadays, Indonesia fulfill the demand of fatty acid by importing it, through Indonesia is one of major producer of Crude Palm Oil (CPO), one of vegetable oil beside Palm Kernel Oil (PKO) and Coconut Oil (CNO) that can be used as the raw material for the production of fatty acid. In order to increase the added value of palm oil and to fulfill the country demand of fatty acid, it is necessary, finding a new fatty acid production process which is more efficient and more economial. Because palm oil has a lipase enzyme that can hydrolyze the triglyceride of palm oil, it is urge to study the technology of fatty acid production by utilize the lipase of palm oil. The thermal protonation of microwave toward the fatty acid chain in enzyme is the important matter, because enzyme will memorize the ionization condition from aquatic solution before the dehydration process (enzyme’s pH memory). Because of that, “the tuning” towards pH will fasten the hydrolysis rate. The parameters of the research were reaction temperature, pH, power, ratio of water-fruit, mechanical treatment and the milling of the palm oil as time function. Keywords : fatty acid, lipase enzyme, interfacial antivation, microwave

FORMULASI MIKROENKAPSUL OLEORESIN KAYUMANIS (Cinnamon burmanni) DAN CENGKEH (Caryophillus aromaticus Linn)

METANA Vol 8, No 01 (2012): Juli
Publisher : METANA

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Abstract

Product development spices such as cinnamon and cloves in the form of oleoresin microcapsules cinnamon and cloves that can be used as a natural preservative because of its potential as an antioxidant and antimicrobial as well as a flavoring agent (agent taste) in food products. In this research, formulation of microcapsules to obtain microcapsules pleoresin cloves and cinnamon. Optimal extraction results obtained at 50 ° C, pressure of 350 bar, the efficiency of clove and cinnamon bark amounted to 17.24% and 1.16% of khromatography Cinnamaldehye analysis of cinnamon was 96.7%, moderate levels of eugenol clove 72, 08%. Terstabil emulsion composition with a ratio of lecithin; gum arabic; malto dextrin and CMC (10; 90, 10, 10), emulsion terstabil microcapsules made ​​with two formulas, formula A with clove oleoresin composition is more dominant, and the composition of formula B with composition oleoresin microcapsules cinnamon bark is more dominant, the results for the microencapsulation formula A 8 (1:4) was 85.98% and B8 formula (4:1) 89.13%. Key word : oleoresin clove, cinnamon-microencapsulated