Judul: Sistem Penunjang Keputusan Pendirian Industri Metil Ester Sulfonat Berbahan Baku PKO
Abstrak: Minyak kelapa sawit merupakan salah satu komoditas pertanian utama dan unggulan di Indonesia, baik sebagai sumber pendapatan bagi jutaan keluarga petani, sebagai sumber devisa negara, penyedia lapangan kerja, maupun sebagai pemicu dan pemacu pertumbuhan sentra-sentra ekonomi barn, serta sebagai pendorong tumbuh dan berkembangnya industri hilir berbasis minyak kelapa sawit di Indonesia. Sebagai sumber devisa, pada tahun 2002 ekspor minyak sawit atau CPO mencapai 3,1 juta ton dengan nilai US$ 1.327 juta dan minyak inti sawit atau PKO mencapai 920 ribu ton dengan nilai USS 386 juta. Diversifikasi produk minyak sawit dapat mempertahankan posisi komoditi sawit sebagai salah satu sumber devisa dan keunggulan komparatif bangsa kita. Metil Ester Sulfonat adalah bentuk: diversifikasi minyak kelapa sawit yang memiliki potensi besar untuk dikembangkan. produk ini memiliki nilai tambah tinggi dan harganya mencapai 4-5 kali lipat harga PKO. MES ini dibutuhkan sebagai bahan baku industri sabun dan detergen, saat ini industri tersebut masih memiliki ketergantungan impor surfaktan, hal ini menunjukkan bahwa terdapat potensi besar untuk memproduksi MES di Indonesia. Industri MES membutuhkan teknologi tinggi sehingga investasi yang dibutuhkan juga relatif besar untuk itu harus dilakukan studi kelayakan seeara tepat. Sistem Penunjang Keputusan adalah alat bantu dalam studi kelayakan sehingga prosesnya dapat dilakukan seeara cepat, tepat dan akurat.
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Judul: Sintesa Metil Ester Sulfonat dari Metil Ester Berbahan Baku PKO pada Skala Pilot Plant
Abstrak: One of the palm oil-based oleochemical industry which has a great prospect to be developed in Indonesia is the surfactant industry. Surfactant is a surface active agent which can be produced by chemical or biochemical synthesis. Surfactant has been widely applied in several kind of industries as adhesive, wetting, foaming, emulsifier, or penetrating material component. One kind of the natural-based surfactant which currently has been researched and developed is the methyl ester sulfonates (MES) surfactant. MES surfactant is one of the anionic surfactant which can be made using the methyl ester from palm oil through the sulfonation process. Research on the MES surfactant production process at the laboratory scale has been conducted many times and it gives product result that can be applied on many kinds of cosmetics, cleaner, and personal care products, and also for enhanced oil recovery (EOR) application on the oil mining. At the upgrading stage of MES surfactant production scale from the laboratory scale to the pilot plant scale, treatment of reaction time and stirring speed on the processing reactor is important to be noticed. The objectives of this research are: (1) to get the process condition which can be used to produce MES surfactant made from PKO-based methyl ester using sulfonation reactor at the pilot plant scale, (2) to obtain the characteristic of the produced MES surfactant product made from PKO-based methyl ester, (3) to get the financial feasibility of the industry of MES surfactant made from PKO-based methyl ester. Sulfonation process of palm kernel oil methyl ester is conducted using batch system in 100 L scale sulfonation reactor tank. Sulfonation process is conducted by mixing the methyl ester and NaHSO3 reactant at reactant mol ratio 1:1.2. Temperature of the process is 100oC. In this research, process variables which are supposed to influence the quality of MES product are the stirring speed at the process and the duration of sulfonation process. The treatment of stirring process consists of 3 grades, those are at the speed of 140, 160 and 180 rpm. The treatment of sulfonation process duration is in every 30 minutes interval in period of 0-360 minutes. Characterization of produced MES product includes test of blue thymol, pH, color (brightness), surface tension decreasing ability, interface tension decreasing ability, emulsion stability, foam stability, and detergency. Determination of relational equation model between product quality parameter and treatment, is using the curve fitting method. Determination of sulfonation process condition, which can be used to produce MES using the existing sulfonation reactor, is conducted using the multi-regression method. The analyzed investment feasibility criteria are Net Present Value (NPV), Internal Rate of Return (IRR), Net Benefit-Cost Ratio (Net B/C), Break Even Point (BEP), Pay Back Period (PBP) and sensitivity analysis. 7 From the result of this research, it can be concluded that the existing sulfonation reactor can be used to produce MES surfactant using batch system with NaHSO3 as the sulfonating agent. The characteristics of the produced MES product are: (1) blue thymol test gives a positive result, (2) pH before purification : 3.53 – 5.94, (3) pH after purification: 5.77-6.21,
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Judul: Pengukuran Jantung Kelinci New Zealand White (Oryctolagus cuniculus) dengan Radiografi Toraks
Abstrak: This research was conducted to evaluate radiographs heart size of anaesthetized New Zealand White rabbits (Oryctolagus cuniculus) under different combination of ketamine and xylazine. The rabbits were divided into three groups. Group A were anaesthetized using a 35 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=5). Group B were anaesthetized using a 40 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=3) while group C were anaesthetized using 45 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=3). Parameter of observation from left laterolateral view were: 1) the apicobasilar length of the heart (AB), 2) the width of the heart (CD), 3) the distance between the cranial edge of the fifth rib and the caudal edge of the seventh rib perpendicular to the spine (R5-7), and 4) the vertical depth of the toraks (H). Parameter of observation from dorsoventral view were: 1) the length of the heart (L), 2) the width of the heart (W), and 3) the width of the thorax (T). The result from the heart parameters observation that were measured in left laterolateral view and dorsoventral view shows theres no significantly differ among the groups (P > 0.05). The vertebrae heart size (VHS) values obtained from the sum of the length of the long and the short axes on left laterolateral view. The long axes mean values (A) were 4.35±0.26 v and the short axes mean values (B) were 3.59±0.30 v, therefore VHS mean values were 7.94±0.49 v. On the dorsoventral view, the length of the heart mean values (L) were 4.32±0.29 cm, the width of the heart mean values (W) were 3.33±0.26 cm, and the width of the thorax mean values (T) were 5.85±0.30 cm. In normal conditions, the width of the heart should be less than two-thirds the width of the thorax and values obtained of 3.33<3.72 it shows that the heart is in the normal range. The best ratio to calculated the normal heart dimension in the left laterolateral view was compared the long axes with the vertical depth of the thorax, whereas in dorsoventral view, the length of the heart was compared with the width of the heart.
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