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Hodijat, Asep
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Elektroflotasi Ion Logam pada Air Limbah Hodijat, Asep; Nurlina, Elin
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 2 No 1 (2003): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jt.vol2no1.211

Abstract

Berbagai teknik pengolahan air buangan baik secara fisika, kimia atau secara biologi untuk menyisihkan bahan polutannya telah banyak dikembangkan. Metoda pengolahan tersebut dapat diaplikasikan secara sendiri-sendiri atau dikombinasikan. Metode secara fisika kimia untuk memisahkan suatu ion logam dengan bahan lainnya dalam suatu limbah cair, dapat dilakukan dengan elektroflotasi ion. Sifat flotasi suatu ion ditentukan oleh kemampuan ion logam tersebut untuk menempel pada gelembung gas, dan hal ini sangat dipengaruhi oleh sifat dari permukaan logam . Untuk menghasilkan sifat permukaan yang sesuai dengan yang diinginkan, maka dalam prosesnya perlu ditambahkan reagen-reagen yang dapat mengubah sifat dari permukaan logam tersebut. Elektroflotasi menghasilkan efek pemisahan gas secara elektrolitik . Efektivitas flotasi tergantung kepada beberapa faktor, diantaranya dispersitas, volume dari fase gas, tipe dan konsentrasi surfaktan, kondisi hidrodinamik pH dan kandungan ion dalam media.
Pengaruh Konsentrasi Starter Bimo-CF dan Waktu Fermentasi terhadap Karakteristik Tepung Mocaf Ilyasa, Sephilana Nur; Hodijat, Asep; Putranto, Kelik
Jurnal Dimamu Vol. 3 No. 2 (2024)
Publisher : Ma'soem University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32627/dimamu.v3i2.957

Abstract

Flour Mocaf is an alternative to wheat flour. Flour Mocaf using raw materials from cassava. In the process of making flour Mocaf fermented using starter Bimo-CF. The research was carried out at the Chemistry Laboratory, Microbiology Laboratory, Faculty of Agriculture, Ma'soem University and Food Processing Laboratory, University of Pasundan from 7 January 2023 to 4 June 2023. The research method used was the experimental method with a factorial Randomized Block Design (RBD) with three repetitions and 9 combination of concentration (d) and time (w) treatments : d?w?, d?w?, d?w?, d?w?, d?w?, d?w?, d?w?, d?w?, d?w?. Symbols 'd?' 0.5 grams, 'd?' 1 gram and 'd?' 1.5 grams. Symbols 'w?' 12 hours, 'w?' 18 hours and 'w?' 24 hours. Observations were made on water content, starch content, yield, while organoleptic tests were carried out on the level of preference for color, aroma, taste and texture. The results showed that the best concentration were d? with a moisture content of 7.69% and d? with a starch content of 85.53%. The best fermentation time was when the water content w? was 7.70% and w? with a yield of 85.60%. Interaction of the best concentration and time on flour Mocaf on d?w? with a moisture content of 7.87%. Organoleptic tests on the level of preference for color (3.28), taste (2.98), aroma (2.98) and texture (3.33).
Pengaruh Suhu dan Jangka Waktu Pengeringan Chips Ubi Kayu yang di Fermentasi terhadap Karakteristik Tepung Mocaf Al Haq, Isa Maulana; Hodijat, Asep; Putranto, Kelik
Jurnal Dimamu Vol. 4 No. 2 (2025)
Publisher : Ma'soem University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32627/dimamu.v4i2.1432

Abstract

Mocaf is a flour that can be used as an alternative to wheat flour. Several factors in mocaf processing can produce flour with poor characteristics, ranging from small yields, high moisture content, brownish color and sour aroma. Some of the factors that influence the making of mocaf flour are the temperature and drying time of cassava chips. The purpose of this research is to determine the right temperature and time period in the drying process of cassava chips so as to obtain good mocaf flour characteristics. The research method used was the experimental method using a factorial pattern Randomized Group Design. The treatments consisted of drying temperature (60oC, 70oC and 80oC) as the main factor and drying time (12 hours, 16 hours and 20 hours) as the second factor, each treatment repeated 3 times. The research was conducted at the Chemistry Laboratory and Food Processing Laboratory of Ma'soem University, Sumedang, from March to July 2024. The results showed that the best drying temperature was 80oC which gave a yield of 26.34%, a degree of fineness of 99.89% and a moisture content of 5.09%. The best drying time was 16 hours with a yield of 23.39%, a degree of fineness of 99.69%, a moisture content of 5.93% and a color value of 3.66. There is an interaction between temperature and drying time. The combination of 60oC drying temperature with a period of 20 hours is the best treatment with a yield of 29.05%, a degree of fineness of 99.93% and a moisture content of 5.33%.
Co-Authors Al Haq, Isa Maulana Ilyasa, Sephilana Nur Kelik Putranto, Kelik Nurlina, Elin