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All Journal Jurnal Rekayasa Proses PROSIDING SEMINAR NASIONAL GEMA TEKNOLOGI METANA Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Waste Technology Seminar Nasional Teknik Kimia Kejuangan Majalah Ilmiah MOMENTUM E-Dimas: Jurnal Pengabdian kepada Masyarakat Syntax Literate: Jurnal Ilmiah Indonesia CHEESA: Chemical Engineering Research Articles Jurnal Rekayasa Proses Jurnal Litbang Provinsi Jawa Tengah Journal La Multiapp Jurnal Pengabdian Vokasi Journal of Vocational Studies on Applied Research E-Amal: Jurnal Pengabdian Kepada Masyarakat

Mohamad Endy Y Yulianto

Departement Of Chemical Engineering, Vocational School, Diponegoro University

Author-ID : 2840209

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Public Health Social Sciences Other

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Effect of Cycling and Washing in Fouling Level from Theaflavin Filtration on Ultrafiltration Membrane Nyamiati, Retno Dwi; Yulianto, Mohamad Endy; Nanda, Dodi Eko; Diwiyanto, Yusron Mahendra
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

Ultrafiltration membranes, characterized by their molecular weight cutoff ranging from 50 to 100 kDa, are extensively employed for the filtration of macromolecules including suspended solids, carbohydrates, proteins, and various other components. However, the prolonged usage of these membranes leads to a notable decline in their performance due to fouling. Membrane fouling entails the accumulation of filtered foulant media and the formation of deposits, adversely impacting the filtration efficiency. This study focuses on evaluating the impact of repeated filtration cycles on membrane fouling and investigates the effectiveness of membrane washing in restoring membrane performance. The ultrafiltration membrane was subjected to five consecutive repetition cycles using theaflavin as the filtration media. The observed flux exhibited a substantial decline of 87%, decreasing from an initial value of 0.0574 L/m2.hr to 0.0073 L/m2.hr. To mitigate fouling and enhance membrane performance, a thorough washing process was carried out. Following the washing procedure, the flux was found to increase to 0.034 L/m2.hr, indicating a significant improvement in the membrane's performance. These findings are further supported by the morphological analysis of the membrane using Scanning Electron Microscope (SEM) photographs, which reveal the distinct differences between the membrane's morphology before and after washing.

Effect of Banana Types on Oven Drying Process for Crispy Banana Production Saputri, Arum Dyah; Amalia, Rizka; Yulianto, Mohamad Endy; Paramita, Vita
Journal of Vocational Studies on Applied Research Volume 2, Issue 2, Year 2020 (October 2020)
Publisher : Vocational College of Universitas Diponegoro

This study aims to determine the effect of moisture and drying rate on Kepok and milk banana species, on the production process of crispy banana. An electric oven was used to examine the drying process at variable temperatures of 70 ºC, 80 ºC and 100 ºC with slices of 1 mm, 2 mm, 3 mm and 4 mm thickness. The results showed that the lowest moisture content and maximum drying rate obtained in Kepok was at a temperature of 100ºC, namely 69.167% and 0.045 grams/minute respectively. Meanwhile, for milk banana, the lowest moisture and the maximum drying rate was obtained at a temperature of 100 ºC, namely 68.167% and 0.042 grams/minute respectively. Furthermore, the organoleptic test results showed that kepok and milk banana experienced browning at 100 ºC, but did not at 70 ºC and 80 ºC with a thickness of 1mm, 2mm and 3mm. In addition, the pore structure of both bananas expanded, while the structure of the bananas appeared bigger after drying.

Optimization On Subcritical Fluid Extraction Of Zingiberene Paramita, Vita; Yulianto, Mohamad Endy; Hartati, Indah; Bahrudin, Udin; Broto, R. T. D. Wisnu
Journal of Vocational Studies on Applied Research Volume 1, Issue 1, Year 2019 (April 2019)
Publisher : Vocational College of Universitas Diponegoro

The establishment of subcritical fluid application for zingiberene extraction was studied by employing water as a green solvent. The zingiberene content was observed by using Liquid Chromatography-Mass Spectrofotometry and regarding to the independent variable of temperature, extraction time, ginger-solvent ratio and aging time. By applying subcritical water, the critical value of zingiberene content obtained was 0.036%. This value was approached by the surface modeling of alpha for rotatability design which performed at 125 oC, 20 min of extraction time, 0.08 of ginger to solvent ratio and 9 min of aging time of extraction parameters. The surface modeling was validated by plotting the observed and predicted value of zingiberene content and evidenced by the value of R-square at 0.76.

The Effect of HLB Surfactant Value on The Characteristics of Emulsion Biodiesel Palm Oil Using Homogenizer Damayani, Intan Ardina; Paramita, Vita; Yulianto, Mohamad Endy
Journal of Vocational Studies on Applied Research Volume 3, Issue 1, Year 2021 (April 2021)
Publisher : Vocational College of Universitas Diponegoro

The process of making water emulsion in palm oil biodiesel is assisted by using two types of surfactants with different HLB values, namely Tween 80 and Span 80. This study aims to determine the characteristics of palm oil biodiesel emulsion made using a homogenizer with different HLB values, surfactant composition and water content in each sample. Density, viscosity, stability and microscopy tests were carried out to determine the characteristics of palm oil biodiesel emulsion. The results were obtained in the form of the highest density and viscosity values found in samples with high HLB values, surfactant composition and water content, while for stability test results were found in samples with low HLB values, surfactant composition and low water content. This shows that the difference in the value of HLB used will affect the amount of surfactant composition and moisture content in the sample composition and will affect the density, viscosity and stability of the palm oil biodiesel emulsion formed.

Effect of Pressure Differences on Sludge Filtration Process Efficiency by Using Plate Filter Press Saputri, Rizky Yunita; Nisa, Qurrotun A'yuni Khoirun; Yulianto, Mohamad Endy; Paramita, Vita
Journal of Vocational Studies on Applied Research Volume 1, Issue 2, Year 2019 (October 2019)
Publisher : Vocational College of Universitas Diponegoro

Waste treatment in the industry produce sludge from the settling of solid material as a by product of the treatment process. The resulting sludge can’t be thrown away in large quantities because it can cause problems if there is still water content in it especially for industrial centers located around residential areas. So that filtration is carried out on the sludge from the Sedimentation Tub at the WWTP know in the area of Lamper, Semarang with the aim of reducing the volume of sludge by separating the water from the sludge before being discharged. The results of the analysis of the sludge filtration in the Settling Basin at WWTP obtained the value of cake resistance at a pressure of 75 kg / m2 of 4.42E + 11 m/kg, at a pressure of 90 kg/m2 of 5.62E + 11 m/kg and at a pressure of 104 kg/m2 of 6.74E + 11 m/kg. The results of the analysis on the resistance value of the filter medium obtained a value of 1.59E+12m-1 at a pressure of 75 kg/m2, 1.23E+12 m-1 at a pressure of 90 kg/m2 and 1.61E+12 m-1 at a pressure of 104 kg/m2. While in the analysis of water content, at a pressure of 75 kg/m2 obtained a value of 35.437%, at a pressure of 90 kg/m2 obtained a value of 35.024%, and at a pressure of 104 kg/m2 obtained a value of 34.024%. Efficiency The optimal pressure is 104 kg/m2.

Making Liquid Soap from Cooking Oil Purification Results with Sugarcane Waste Adsorbent Sovia, Ghina; Fauzi, Nurrohmat; Rizka, Rashinta; Pramudika, Satya; Paramita, Vita; Yulianto, Mohamad Endy
Journal of Vocational Studies on Applied Research Volume 2, Issue 1, Year 2020 (April 2020)
Publisher : Vocational College of Universitas Diponegoro

Cooking oil is high enough economic value. Cooking oil is generally used to cook, but its uses are also many other than for cooking needs, such as skin beauty, lubricants and others. In the condition which the longer time, the price of cooking oil is higher than before, making some society to think creative by recycling the oil which has been used cooking oil. According to the research, it is know that sugarcane waste have strong adsorption potency to water content, and free fatty acid content that found in used cooking oil. The variable of this research are the rinsing time and the amount of sugarcane waste used. The best condition reaches to 40 gr sugarcane waste with the decrease water content reach 0.0050%; the rinse of sugarcane waste in 2x24 hours with free fatty acid intensity adsorption up to 0.23%

Simultaneous Caffeine Extraction and Enzymatic Inactivation through Microwave Thermobiochemical Process Yulianto, Mohamad Endy; Madina, Haura Salwa; Aprilani, Berliana
Journal La Multiapp Vol. 6 No. 3 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i3.2238

Indonesia is known as one of the countries producing tea with high bioactive compounds such as caffeine, phenol, and catechin. This study evaluated the effectiveness of microwave-based thermobiochemical methods to extract the three compounds while simultaneously inactivating enzymes. The extraction process was designed using the Factorial Design method, involving variations in the feed:solvent ratio (1:22 and 1:32), temperature (110 °C and 130 °C), and time (10, 20, and 30 minutes). The results showed that catechin had the highest effect of 5.85 with a probability of 35.87%, followed by phenol (5.18; 59.68%) and caffeine (4.51; 54.47%). The normal probability plot graph indicated a distribution of effects approaching normal with R² of 0.9458 (catechin), 0.9395 (phenol), and 0.7946 (caffeine), respectively. Meanwhile, the optimization graph shows a perfect linear relationship (R² = 1), with optimal levels of 17.18 mg/L (catechin), 9.36 mg/L (phenol), and 9.77 mg/L (caffeine), respectively. Thus, this method is proven to be efficient and has the potential to be further developed for sustainable natural material processing industry applications. The variables were designed using the Factorial Design method.

Co-Authors Abdullah Ridhwan Purnomo Adisti Putri Intaniasari Andi Nur Alamsyah Anggista, Giovani Anggun Puspitarini Siswanto Anindya Ardiansari Aprilani, Berliana Ari Yuniastuti Astuti, Septi Kusuma Ayun Sriatmi B Budiyono Broto, R. T. D. Wisnu D. K. wikanta Damayani, Intan Ardina Deddy Kurniawan Wikanta Devita Hardianti Didik Ariwibowo Didik Ariwibowo Diwiyanto, Yusron Mahendra Diyono Ikhsan Diyono Ikhsan Dwi Handayani Dwi Handayani Dwi Handayani Edy Supriyo Eflita Yohana Endah Lestari Fahmi Arifan Fardzanela S Fardzanela S Fauzi, Nurrohmat Fiqih Putri Juanita Frisca Riana A FS Nugraheni S Hanifah Hanifah Heny Kusumayanti Heny Kusumayanti Hermawan Dwi Ariyanto Hermawan Dwi Ariyanto I. Hartati Ifana Ifana Ilyas Teguh Pangestu Indah Hartati Indah Hartati Indra Waspada Isti Pudjihastuti Juli Mrihardjono Juli Mrihardjono Latif, Abdul Madina, Haura Salwa Mandy Ayulia Dwisukma Margaretha Tuti Susanti Margaretha Tuti Susanti Mulyaningsih, M.F. Sri Mustikaningrum, Mega Nanda, Dodi Eko Nanik Damayanti Nisa, Qurrotun A'yuni Khoirun Nyamiati, Retno Dwi Oktavian Dita Ratnasari Pangestu, Ilyas Teguh Pramudika, Satya Prasakti, Laras Priyono Kusumo R.T.D Wisnu Broto Rangkum Sembodo Rendiyatna Ferdian Riana Sitawati Riana Sitawati Rizka Amalia Rizka Amalia Rizka, Rashinta RTD Wisnu Broto Rudi Firyanto Saputri, Arum Dyah Saputri, Rizky Yunita Selvina Selvina Senen Senen Seno Darmanto Seno Darmanto Siti Nur Jannah Sovia, Ghina Sri Utami H Sri Utami Handayani Susiana Purwantisari Sutrisno Sutrisno Sutrisno, Sutrisno Tandang Patria Tama Udin Bahrudin, Udin Vita Paramita Vita Paramita Vita Paramitha Wahyuningsih Wahyuningsih Wendi E Wendi E Winda Kristiana Yudanto, Yusuf Arya Zainal Abidin Zainal Abidin Zainal Abidin

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