Judul: Rancangan Hidrolika Bangunan Pengendali Limpasan di Wilayah Kampus IPB Dramaga, Bogor
Abstrak: Bogor Agricultural University (IPB) stage III physical development is being implemented since 2011. Along with those development, the surface run-off was increased. The aim of these research were (1) to determine ECC-based on water balance, (2) to predict run-off (3) to do hydraulics design of runoff control structure. Based on water balance, environmental carrying capacity (ECC) was analysed, while run-off in IPB campus Dramaga was calculated by the rational method. Hydraulics design of run-off control structure was obtained by trial and error. The region can be divided into 14 catchment area (CA). The ratio of water availability and water demand was 0,9 hence the ECC of IPB Campus Dramaga was overshoot. Total discharge runoff to Campus IPB Dramaga was 5.66 m3/s. Discharge run-off in each CA was about 0.05 to 1.45 m3/s. Run-off control structure was needed to collect surfacerun-off hence increase water availability. Considering the topography and landuse, land and water conservation was needed in CA 4 and CA 9. CA 4 was suitable for reservoir which supported with sediment trap and drainage channel. CA 9 needed sediment trap for each inlet of Situ Leutik and bigger drainage holes along the side street.
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Judul: Analisis Kapasitas Simpan Air di Wilayah Kampus IPB Dramaga, Bogor
Abstrak: Bogor Agricultural University (IPB) stage III physical development is being implemented since 2011. Water balance analysis provided an actual description of water storage capacity and its impact on the environmental carrying capacity. The objectives of the study were (1) to analyze status of environmental carrying capacity based on agroclimate zone and to analyze water supply potential, (2) to analyze water storage capacity and (3) land use planning. The research was started since Febuary until June 2012. The research was conducted using climate data and land cover map that processed with Microsoft Excel, CROPWAT 8.0 and ARCGIS 9.3 software. The ratio of water availability and water demand was 0.9 hence the environmental carrying capacity based on water balance was overshoot. IPB Campus agroclimate zone was A1 based on Oldeman classification. The water footprint was 7,9 x 106 m3/year. The region was divided into 14 catchment area (CA). The biggest storage capacity was 235.78 mm/year on CA 11 and the smallest storage capacity was on CA 9a with only 109.51 mm/year. The objectives of land-use planning was to increase water storage capacity. IPB campus as green campus was recommended to improve groundwater recharge and to reach ratio of ground water recharge and surface run-off of 65:35. According to this result it was to recommended to increase vegetation area on CA 4, CA 7, CA 9a, CA 9b, CA 9c and CA 12.
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Judul: Ekstraksi, karakterisasi dan identifikasi komponen flavor kulit dan hati nenas(Ananas comusus (L) Merr.)
Abstrak: Pemanfaatan daging buah nenas untuk berbagai produk makanan menimbulkan masalah limbah kulit dan hati nenas. Selama ini pemanfaatan limbah nenas ini belum dilakukan secara optimal. Salah satu alternatif pemanfaatan kulit dan hati nenas adalah pembuatan konsentrat flavor. Untuk menghasilkan konsentrat flavor yang mendekati atau yang sama dengan aroma nenas segar, maka dilakukan penelitian mengenai cara ekstraksi, karakterisasi dan identifikasi komponen flavornya. Pada penelitian pendahuluan dilakukan seleksi panelis semi terlatih, melihat pengaruh penyimpanan kulit dan hati nenas terhadap aroma dan pemilihan perbandingan bahan dan air pada proses distilasi. Pada penelitian lanjutan dilakukan beberapa metode ekstraksi yaitu maserasi, distilasi uap, air dan vakum, analisis kualitatif dan kuantitatif komponen volatil kulit dan hati nenas. Maserasi merupakan metode ekstraksi kulit dan hati nenas yang paling mendekati aroma nenas segar, diikuti distilasi vakum, air dan uap. Diklorometana adalah pelarut yang paling baik mengekstrak flavor nenas dibandingkan etanol, dietil eter, pentana dan campuran pentana- diklorometana (1:1), sedangkan dari distilasi aroma distilat vakum pada suhu 80°C yang terbaik. Hasil identifikasi komponen volatil menunjukkan bahwa kulit dan hati Nenas Queen memiliki komponen furanon yang lebih banyak daripada Nenas Cayenne, sebaliknya, komponen ester yang tidak ditemukan di Nenas Queen adalah metil hidroksiheksanoat dan metil 3-hidroksidodekanoat. Komponen yang teridentifikasi beraroma nenas pada Nenas Queen dan Cayenne berturut- turut adalah dimetil propanadioat (311 dan 171 µg/kg), 2,5-dimetil-4- hidroksi-3(2H)-furanon (5046 dan 413 µg/kg), metil 2-metil-3-okso-butanoat (113 dan 104 µg/kg) dan komponen yang hanya terdapat pada nenas Queen, 3-(metiltio)propionat (335 µg/kg). Komponen aroma nenas peka terhadap panas, adanya perlakuan panas menyebabkan degradasi komponen menjadi komponen-komponen beraroma seperti burnt, popcorn dan selai.
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