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Pengaruh Suhu Terhadap Kadar Air Dan Aktivitas Air Dalam Bahan Pada Kunyit (Curcuma Longa) Dengan Alat Pengering Electrical Oven

Teknik Kimia Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro, Indonesia


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Abstract

Kunyit merupakan tanaman obat berupa semak dan bersifat tahunan (parenial). Kandungan air yang cukup tinggi membuat kunyit harus diolah sebelum disimpan dalam jangka waktu yang lama. Pada penelitian ini pengeringan kunyit dengan menggunakan electrical oven. Proses pengeringan kunyit dilakukan dengan variabel berubah seperti jenis bahan, suhu, dan ketebalan irisan. Jenis bahan yang digunakan yaitu kunyit orange dan kunyit putih, variabel suhu pengeringan 700C, 800C, 1000C serta variabel irisan 1mm, 2mm, 3mm, dan 4mm. Uji analisa pada penelitian ini meliputi analisa kadar air, aktivitas air, dan organoleptik seperti uji warna, aroma, dan penampakan fisik. Pada penilitian tersebut didapatkan variabel optimal pada jenis kunyit orange dan putih yaitu pada variabel suhu pengeringan 800C dengan ketebalan irisan 3mm waktu pengeringan selama 135 menit untuk kunyit putih dan 150 menit untuk kunyit orange. Kadar air sebesar 3,515% dan 0,11 aktivitas air pada kunyit putih, aroma dan bentuk yang khas warna dan kunyit serta tidak berubah bentuk, sedangkan pada kunyit orange kadar air sebesar 2,741% dan aktivitas air sebesar 0,061 aroma yang sedikit khas kunyit dengan warna putih kekuningan.

 

Effect of Temperature on Water Content And Water Activity In Material On Turmeric (Curcuma Longa) With Tools Electrical Oven Dryer

 

Turmeric is a medicinal plant of bush and annual (parenial). The water content is high enough to make turmeric should be processed before being stored for long periods. In this research drying turmeric using electrical oven. The process of drying turmeric by changing variables such as material type, temperature, and slice thickness. Type of materials used are orange turmeric and white turmeric, drying temperature variables 700C, 800C, 1000C and variable slices 1mm, 2mm, 3mm, and 4mm. Test analysis in this study include water content, water activity, and organoleptic analysis such as color, aroma, and physical appearance. In the research, the optimum variables on turmeric and white turmeric were varied in drying temperature 800C with 3mm slice thickness drying time for 135 minutes for white turmeric and 150 minutes for turmeric. Water content of 3,515% and 0.11 of water activity in white turmeric, aroma and shapes typical of color and turmeric and unchanged, while in turmeric orange moisture of 2.741% and water activity of 0.061 a slightly turmeric-white scent with white Yellowish.

 

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Keywords: turmeric; electrical oven; water content; water activity; kunyit; electrical oven; kadar air; aktivitas air

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