A field survey on coffee beans drying methods of Indonesian small holder farmers

Abstract

Physical and sensory quality of Java Arabica green coffee beans W B Sunarharum, S S Yuwono, N B S W Pangestu et al. Abstract. Drying agricultural product is a post-harvest process that consumes significant energy. It can affect the quality of the product. This paper deals with literature review and field survey of drying methods of coffee beans of Indonesia farmers. The objective is to supply the necessary information on developing continuous solar drier. The results show that intermittent characteristic of sun drying results in a better quality of coffee beans in comparison with constant convective drying. In order to use energy efficiently, the drying process should be divided into several stages. In the first stage when the moist content is high, higher drying air temperature is more effective. After this step, where the moist content is low, lower drying air temperature is better. The field survey of drying coffee beans in Sumatera Utara province reveals that the used drying process is very traditional. It can be divided into two modes and depend on the coffee beans type. The Arabica coffee is firstly fermented and dried to moisture content of 80% using sun drying method, then followed by Green House model of drying up to moisture content about 12%. The latter typically spends 3 days of drying time. On the other hand, The Robusta coffee is dried by exposing to the sun directly without any treatment. After the coffee beans dried follow by peeled process. These findings can be considered to develop a continuous solar drying that suitable for coffee beans drying.

Effect of Drying Whole and Half Chili Pods Using a Solar Dryer with CaCl2 Desiccant on Quality of Powder Chili

“…The potency of Indonesia as a tropical country with a long duration of radiation, about 10-12 hours per day, was very highly potent to collect solar radiation by the solar collector, and the solar collector converted it into solar drier energy [2]. The performances of solar radiation have been tested to drying agricultural products such as cocoa beans and coffee beans [3][4][5]. Commonly, agricultural products such as red chili do the natural drying process utilizing sunlight with low operating costs as an effort to extend its shelf life due to its water content.…”

Drying and sortation to improve green beans and cup quality of Wamena coffee

“…Arabica was fermented and was sun-dried up to 80% MC, then were dried in a greenhouse until 12% MC. Furthermore, Robusta was sun-dried without any treatment [11].…”

Pengaruh Perbedaan Ketebalan Irisan Asam Gelugur (Garcinia atroviridis) Terhadap Kandungan Total Asam Pada Asam Sitrat Dengan Pengeringan Sinar Matahari Sistim Konveksi Paksa

“…Pada tahap pertama ketika kandungan lembab tinggi, suhu udara pengeringan lebih tinggi lebih efektif. Untuk langkah-langkah di mana, konten lembab rendah, suhu udara pengeringan lebih rendah lebih baik [11] Mekanisme pengeringan melalui Kotak Pengering tidak membutuhkan perlakuan fisik untuk merobah posisi semua irisan asam Gelugur saat di keringkan [12] Potensi energi surya Beberapa fakta tentang matahari (surya). Matahari mempunyai diameter m. Bumi mengelilingi matahari dengan lintasan berbentuk ellips dan matahari berada pada salah satu pusatnya.…”