Electronic Theses and Dissertation

Abstract. This study was to examine the characteristics of drying the lemongrass using a Tray Dryer based on different blanching treatments for the production of lemongrass powder. This study used a non-factorial Random Design (RAL) with treatment without blanching, steam blanching, and hot water blanching. Parameter research include ambient temperature, air humidity, air velocity, weight measurement during drying, moisture measurement during drying, drying rate, water content of lemongrass powder, rendement, and organoleptic test (aroma and color). The hedonic test was conducted on 30 panelists. The results of this study showed that blanching treatment, blanching of steam, and water blanching had no significant effect on water content, but had significant effect on yield, organoleptic flavor, and organoleptic color. Based on the results of a further test Significant Difference (LSD), it can be concluded that the best treatment is obtained in the treatment steam blanching. In the treatment obtained rendemen of 18.17%, water content 8.85%, favorite score on color 4 (like) and favorite score of smell 4 (like).
Keywords: Lemongrass, blanching treatment, Try Dryer, Lemongrass powder.


Abstrak. Penelitian ini bertujuan untuk mengkaji karakteristik pengeringan serai dapur menggunakan alat pengering Tray Dryer berdasarkan perlakuan blanching yang berbeda untuk produksi bubuk serai. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) non faktorial dengan perlakuan tanpa blanching, blanching dengan uap, dan blanching dengan air panas. Parameter penelitian meliputi suhu lingkungan, kelembaban udara, kecepatan aliran udara, pengukuran bobot selama pengeringan, pengukuran kadar air selama pengeringan, laju pengeringan, kadar air bubuk serai dapur, rendemen, dan uji organoleptik (aroma dan warna). Uji hedonik dilakukan terhadap 30 orang panelis. Hasil dari penelitian ini menunjukkan bahwa perlakuan tanpa blanching, blanching uap, dan blanching air tidak berpengaruh nyata terhadap kadar air, namun berpengaruh nyata pada rendemen, organoleptik aroma, dan organoleptik warna. Berdasarkan hasil uji lanjut Beda Nyata terkecil (BNt), dapat disimpulkan bahwa perlakuan terbaik didapatkan pada perlakuan blanching dengan uap. Pada perlakuan tersebut diperoleh rendemen sebesar 18,17%, kadar air 8,85%, skor kesukaan terhadap warna 4 (suka) dan skor kesukaan terhadap bau 4 (suka).
Kata kunci :Serai Dapur, perlakuan blanching, Try Dryer, bubuk Serai.

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