Judul: Recovery Protein dari Limbah Air Cucian Mince Fish dengan Reverse Osmosis.
Abstrak: Limbah air cucian mince fish mengandung protein dan beberapa zat telarut lainnya yang berpotensi menyebabkan pencemaran apabila dibuang ke perairan tanpa pengolahan telebih dahulu. Beberapa teknik recovery protein yang umum digunakan yaitu evaporasi, koagulasi, dan sentrifugasi. Tetapi teknik recovery tersebut memiliki kekurangan seperti biaya produksi yang cukup tinggi serta rendemen yang sedikit. Teknologi alternatif yang sedang berkembang saat ini yaitu filtrasi membran. Membran dapat me-recovery protein dengan biaya yang lebih rendah dan menghasilkan rendemen yang lebih besar, karena itu diperlukan sebuah penelitian proses recovery protein dari air limbah cucian mince fish dengan mengaplikasikan teknologi filtrasi membran untuk menghasilkan konsentrat protein yang memiliki kadar protein tinggi dan limbah industri yang memenuhi standar baku mutu lingkungan. Tujuan penelitian ini adalah untuk mengetahui kinerja membran filtrasi RO pada proses recovery protein dari limbah air cucian mince fish.
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Judul: Optimasi Proses Reverse Osmosis pada Recovery dan  Pemekatan Komponen Flavor Limbah Cair Pasteurisasi  Rajungan
Abstrak: Limbah rajungan jika tidak dimanfaatkan dengan optimal dapat menjadi sumber pencemaran bagi lingkungan. Pemanfaatan limbah cair rajungan masih terbatas, diantaranya untuk pembuatan petis yang dilakukan secara tradisional. Alternatif pemanfaatan yang bernilai ekonomis adalah proses recovery komponen flavor terkait kandungan berbagai komponen flavor dalam rajungan. Proses recovery flavor banyak dilakukan dengan evaporasi atau freeze concentration. Masalah yang muncul pada proses evaporasi adalah hilangnya sebagian komponen volatil flavor karena panas, sedangkan proses freeze concentration menghasilkan rendemen yang rendah. Penggunaan teknologi membran reverse osmosis (RO) yang ramah lingkungan dan tingkat rejeksi yang tinggi diharapkan akan menghasilkan rendemen yang lebih besar.
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Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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