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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Ilmiah Inovasi Journal of Food Engineering Jurnal Teknik Pertanian Terapan

Siti Djamila

Politeknik Negeri Jember

Author-ID : 4394708

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Other

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Title

Perbandingan Mutu Tepung Karagenan Hasil Ekstraksi Metode Pemanas Ohmic Dan Konvensional Iswahyono Iswahyono; Siti Djamila; Amal Bahariawan; Meta Fitri Rizkiana
JOFE : Journal of Food Engineering Vol. 1 No. 1 (2022): January
Publisher : Politeknik Negeri Jember

The ohmic technology was applied for the carrageenan extraction process from seaweed (Eucheuma cattoni). The principle of ohmic technology is based on passing an electric current through seaweed and triggering its internal energy. The objectives of this study were to compare two different extraction methods using the ohmic and conventional heaters in terms of the quality of carrageen flour. This study were conducted by two different heating sources during the seaweed extraction process, i.e., ohmic heating and conventional heating from a gas stove. Each method was repeated three times. The extracted filtrates were dried, milled, and sieved using an 80-mesh sieve, then the quality of carrageenan flour was measured. Quality of extracted carrageenan flour using the ohmic and conventional heating methods are: 1) the extraction yield of 45%; 42%, 2) moisture content 10%; 18%, 3) white degree 77.63%; 74.27%, 4) viscosity 6.02 cp; 4.57 cp and 5) gel strength 174 gr / cm2: 159 gr / cm2. The result of statistical analysis between two methods with α 5% showed no significant difference in yield parameters however significantly different for water content, white degree, viscosity, and gel strength. The quality of extracted carrageenan flour of the ohmic heating method was better compared to the conventional heater.

Uji Kinerja Mesin Petik Pucuk Teh (Tea Harvester) Tipe TS120L Pada Lahan Berbukit Dengan Kemiringan 40-60 An’illa Agrissa Nurringge; Iswahyono Iswahyono; Siti Djamila; Amal Bahariawan
JOFE : Journal of Food Engineering Vol. 1 No. 3 (2022): July
Publisher : Politeknik Negeri Jember

The quantity and quality of tea products were determined by the activity of harvesting tea leaves. The performance of the picking process was influenced by the characteristics of the tea garden land. PT. Candi Loka has hilly tea gardens with slope variations up to 60o. The purpose of this research is to observe the performance of the tea picking machine TS120L on garden land with a slope of 40-60o. Parameters observed in this activity include data on total picking time, plucking speed, plucking machine width, picking area, weight of plucked tea and fuel usage. The obtained data were analyzed to obtain the value of field capacity, efficiency of plucking performance, fuel consumption and analyzed descriptively. The results showed that the average value of theoretical field capacity ha/hour, average actual field capacity 0,14 ha/hour, average efficiency 73,68 %, average actual material capacity 1347 kg/ha and average fuel consumption 1,3 liter/hour. In general, the hilly land with a slope of 40- 60o decrease the performance of the tea picking machine TS120L

Evaluasi Kinerja Generator Microbubble Terhadap Kondisi Nutrisi dan Respon Pertumbuhan Kailan (Brassica Oleraceae) Secara Hidroponik Sistem DFT Di Dalam Greenhouse Habib Ihza Mahendra; Iswahyono Iswahyono; Siti Djamila; Amal Bahariawan; Meta Fitri Rizkiana
JOFE : Journal of Food Engineering Vol. 2 No. 3 (2023): July
Publisher : Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/jofe.v2i3.4140

The kailan plant (Brassica oleraceae) has high commercial potential due to its high nutritional content, delicious taste, and high market interest. Kailan could be cultivated through hydroponic planting by utilizing limited land. The DFT hydroponic system is an option due to faster and constant growth, shorter harvest period, and easy maintenance. If the power goes out, the plants can still survive. One of the weaknesses is the limited oxygen availability due to poor circulation. This study aimed to determine the effect of using a microbubble generator to enrich oxygen on nutritional conditions and the growth response of kailan plants compared to plant growth without a microbubble generator. The applied method in this study was to compare nutritional content and plant growth responses between using a microbubble generator and without utilizing a microbubble generator. The results showed that using the microbubble generator affected nutrients' concentration, temperature, and pH and positively impacted plant growth responses: number of leaves, root condition and plant weight at harvest period.

Co-Authors Adi Chandra Nugraha Amal Bahariawan An’illa Agrissa Nurringge Didik Hermanuadi Elly Kurniawati Elok Kurnia Novita Sari Faizzatun Nafisah Habib Ihza Mahendra Iswahyono Iswahyono Meta Fitri Rizkiana Muhammad Luthfi Dinsaputro Ririn Novitasari

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