Judul: Optimasi Pencampuran dalam Proses Produksi Susu Kental Manis Lemak Nabati Rekombinasi (Studi Kasus di PT. XYZ)
Abstrak: Ones of the critical stages in the manufacture of sweetened condensed milk recombination is mixing. This is caused by the characteristics of skim milk powder (SMP) used as the main raw material is quite difficult as well as total dissolved solids mixing reached 69%. Criteria for optimal mixing results shown by the solubility index, where the lower the index value of the solubility of the better quality mixing results. Based on data owned by PT. XYZ, the optimum mixing process is <0.1 ml. Capacity of mixing in PT. XYZ in 2009 is 7 tons for 70 minutes, by market demand and efficiency of the capacity was increased to 9 ton/60 minutes while maintaining the solubility index values <0.1 ml. So that the necessary optimization of critical parameters such as agitator speed, the use of high shear mixer and dosing speed of powdered milk. This study aims to determine the critical parameters of the mixing process to obtain appropriate quality standards with the most optimal processing time Methods the study consisted of three phases, namely design review process mixing equipment between the previous (7000 kg/70 min) with the new 9000 kg/60 minutes. The second research phase is to determine the speed of inline high shear mixer pump by performing experiments at 2000 rpm, 2500 rpm and 3000 rpm. Phase 3 study is the optimization of the mixing process by using a completely randomized experimental design, namely: Powder Inlet velocity (120, 150 and 180 kg/min); hydration time (5,10 and 15 minutes). So of all the combinations obtained nine different treatments. Analytical methods used to measure the quality of mixing is a method used in PT. XYZ are: solubility index, total solids, fat content, viscosity, specific gravity and pH. Then to see the influence and interaction of each treatment tested a real difference and linear regression to obtain the optimal parameters according to design. From the experimental results can be seen that the speed of inline high shear mixer pump is best at 2500 rpm.. The best results of mixing time is 65 minutes and solubility index <0.1 ml at the treatment A2B1 (milk powder dosing rate 155 kg/min and hydration time for 5 minutes). The relationship between the hydration time and milk powder dosing rate to solubility index is expressed in the equation Y = 0.192 + 0.001 A-0,013B, where: A = milk powder dosing rate, B = hydration time, Y = solubility index. While the relationship between the hydration time, milk powder dosing rate with respect to mixing time is expressed in the equation Y = 26.556 + 0.3 A +0.6 B, where: A = milk powder dosing rate, B = hydration time, Y = total mixing time.
Keyword: condensed milk, mixing, high shearing, solubility, recombine milk, hydration

Judul: Optimalisasi produksi susu pasteurisasi di PT XYZ, Jakarta
Abstrak: Susu pasteurisasi adalah produk yang sudah lama diproduksi oleh industri- industri pengolahan susu di Indonesia. Walaupun susu pasteurisasi mempunyai daya tahan yang sangat singkat, harga relatif mahal, akan tetapi saat ini konsumen susu pasteurisasi cukup berkembang. Hal ini menyebabkan meningkatnya jumlah produsen susu pasteurisasi dan perluasan usaha yang telah ada. PT XYZ merupakan salah satu perusahaan yang memproduksi susu pasteurisasi yang terdiri dari empat rasa yaitu plain dan choco (dengan kemasan pack 950 ml, 500 ml, 200 ml, dan bulk 10 liter), non fat 950 ml, dan Imdi 200 ml. Sebagai perusahaan yang memproduksi lebih dari satu macam produk, dengan ketersediaan sumberdaya yang terbatas, maka perusahaan harus menentukan kombinasi produk susu pasteurisasi yang akan diproduksinya agar sumberdaya teralokasikan secara optimal. Tujuan dari penelitian ini adalah untuk menentukan kombinasi produksi optimal dan pengaruh dilakukannya lima skenario, yaitu 0). Adanya keterbatasan susu segar, 1). Penurunan harga bahan baku impor, 2). Kenaikan harga bahan baku impor, 3). Perbaikan kualitas susu segar, 4). Tidak ada pembatasan produksi, terhadap keputusan produksi dan alokasi sumberdaya di PT XYZ. Untuk mencapai tujuan tersebut, digunakan model program linier dan dipecahkan dengan bantuan program komputer ABQM (Allyn Bacon Quantitative Method).
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Judul: Ornithonyssus Bursa (Berlese, 1888) Famili Macronyssidae yang Menyerang Unggas Dan Penaggulangannnya
Abstrak: Ornithonyssus bursa adalah tungau penghisap darah pada unggas di daerah tropis dan subtropis. Tungau ini relatif kecil, dengan panjang tubuh antara 700-1000 mikron dan lebarnya 250-490 mikron. Tubuhnya bulat berwarna coklat kekuningan sebelum menghisap darh dan berwarna merah setelah menghisap darah dari induk semangnya.
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