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All Journal Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development Abdimas Jurnal Bahan Alam Terbarukan Sainteknol : Jurnal Sains dan Teknologi Rekayasa Mesin Seminar Nasional Teknik Kimia Kejuangan Konversi Journal Of Chemical Process Engineering (JCPE) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Indonesia Journal of Halal Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Jurnal Inovasi Teknik Kimia ASEAN Journal of Chemical Engineering Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Food ScienTech Journal Bubungan Tinggi: Jurnal Pengabdian Masyarakat REACTOR : Journal of Research On Chemistry And Engineering Jurnal Bina Desa International Journal of Research Innovation and Entrepreneurship International Journal of Renewable Energy Development Journal Of Chemical Process Engineering Journal of Clean Technology JURNAL REKAYASA KIMIA & LINGKUNGAN Sainteknol : Jurnal Sains dan Teknologi Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Astrilia Damayanti
Universitas Negeri Semarang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Immobilization of Saccharomyces cerevisiae in Jackfruit (Artocarpus heterophyllus) Seed Fiber for Bioethanol Production Zuhriyan Ash Shiddieqy Bahlawan; Megawati Megawati; Astrilia Damayanti; Radenrara Dewi Artanti Putri; Ayu Nur Permadhini; Khoridatus Sulwa; Fahreza Pracenda Felicitia; Anggun Septiamurti
ASEAN Journal of Chemical Engineering Vol 22, No 1 (2022)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.69781

Abstract

Bioethanol is alternative renewable energy typically obtained from glucose through a fermentation process using Saccharomyces cerevisiae. In the bioethanol fermentation process using yeast, there are several inhibiting factors, such as a high concentration of substrate, ethanol as the product, and nutrients. The present study aimed to investigate the effect of fermentation time (12- 72 hours), immobilized carrier size (sizes of 0.5 cm3 , 1 cm3 , and 1.5 cm3 ), and medium pH (3.0, 4.0, and 5.0) on the ethanol fermentation process using immobilized yeast in jackfruit (Artocarpus heterophyllus) seeds and subsequently to compare its performance with a free cell system. The highest ethanol concentration (89.15 g/L) with a yield of 96.92% was obtained by immobilizing yeast in jackfruit seed at a fermentation time of 72 hours, carrier size of 0.5 cm3 , and medium pH of 5.0. When compared to the free cell system fermentation under identical operating conditions, immobilized yeast in jackfruit seed obtained 1.41 times higher ethanol concentration. Jackfruit seed also led to a higher ethanol concentration compared to other S. cerevisiae carriers. Altogether, our findings imply that jackfruit seed has great potential as a carrier of S. cerevisiae in the process of fermenting glucose into ethanol
Optimization of Anthocyanin Extraction from Cockspur Coral (Erythrina Crista-Galli L.) Petals with Microwave-Assisted Extraction (MAE) using Response Surface Methodology Astrilia Damayanti; Bayu Triwibowo; Megawati Megawati; Miftahuddin Azhari; Sandra Anggita Fadriana
ASEAN Journal of Chemical Engineering Vol 21, No 2 (2021)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.63393

Abstract

Cockspur coral (Erythrina crista-galli L) petals are flowers that contain anthocyanins and active compounds of flavonoids and tannins. This study aims to determine the optimum conditions for the anthocyanin extraction process of cockspur coral petals using Microwave-Assisted Extraction (MAE), analyzed through the Response Surface Method (RSM). This process uses ethanol-hydrochloric acid solvents and a Box-Behnken experimental design involving three factors, namely the solvent ratios (w/v) (1:5, 1:15, and 1:25), microwave powers (300, 450, and 600 watts), and extraction times (3, 9, and 15 minutes). As a result, the second-order polynomial model was enhanced and sufficient to explain the variation of the data that denoted the significant correlation with the independent variables and the response. Derringer's desired function methodology was used for optimizing studies and generated ideal conditions for each or combined an independent variable.  The optimum anthocyanin extract of 5.82 mg/L was obtained at a power condition of 325,5 Watts, an extraction time of 3.05 minutes, and a solvent ratio of 20.5. Meanwhile, the operating conditions at a power of 310.8 Watts, a time of 14.94 minutes, and a solvent ratio of 24.96 resulted in the optimum color intensity (IC) of 1040.26. In the meantime, the optimum antioxidant activity was obtained at a power of 585.97 Watts, a time of 4.93 minutes, and a solvent ratio of 5.43 with IC50 of 0.115.
Training on making kombucha tea from snake fruit peel and butterfly pea flower Astrilia Damayanti; Megawati Megawati; Widi Astuti; Luluk Arvi Cahyaning Suwandi; Reyhan Dwi Saputra; Melanie Hartalia Putrie
Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Vol 7, No 4 (2022): November 2022
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/abdimas.v7i4.8240

Abstract

Snake fruit peel is an organic waste that is often not utilized, while the flower of the butterfly pea is known as a natural dye for food and beverages. The COVID-19 pandemic causes susceptibility to the human body. Therefore, it is necessary to process healthy drinks in order to utilize organic waste. This community service program activity aims to introduce fermented food processing to the community, especially the Family Welfare Development (PKK) Group RT 3 RW 3, Ngijo Village, Gunungpati District, Semarang City by utilizing snake fruit peel (Salacca zalacca) and butterfly pea flower (Clitoria ternatea) as kombucha tea. The method of this program is in the form of delivering material either through posters, videos, demonstrations, and youtube links. A positive response was given by community after conducting a taste test on the product that was socialized in the form of many questions submitted including other alternative raw materials and the volume of kombucha tea served. This program has the potential to foster community motivation in entrepreneurship so that family income will increase.
Optimization of The Aqueous Enzymatic Extraction (AEE) of Rice Bran Oil With Cellulase Using Response Surface Methodology Astrilia Damayanti; Bayu Triwibowo; Megawati Megawati; Ahmed Tessario Ekanuramanta; Harianingsih Harianingsih; Kevin Thomas; Nurul Huda; Nuryoto Nuryoto
Jurnal Bahan Alam Terbarukan Vol 12, No 1 (2023): June 2023 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v12i1.42137

Abstract

Rice Bran Oil (RBO) is an oil extracted from rice bran with unsaturated fat content according to World Health Organization (WHO) standards. The enzymatic extraction process of rice bran for oil extraction using cellulase enzymes is considered effective because it is capable of producing oil. Parameters of temperature and incubation time have an influence on the yield of oil produced. So that research is needed regarding the optimum conditions of the enzymatic extraction process including temperature and incubation time on the yield and levels of FFA RBO.Software Design Expert was used in this study to optimize RBO extraction with cellulase using the Response Surface Methodology (RSM) method in the Central Composite Design (CCD) factorial experimental design. The selected independent variables consisted of incubation temperatures, namely 35, 50, and 65 0C and incubation time for 2, 3, and 4 hours. The results show that the RBO yield is 1.7% and the minimum target for FFA levels is 8.4% at a temperature of 51.5 0C with an incubation time of 4 hours. Processing data with Design expert software produces an analysis of ANOVA experimental data. Incubation time has a significant level (p0.05) on RBO yield and incubation temperature has a significant level (p0.05) on RBO FFA.
Biohydrogen Production by Reusing Immobilized Mixed Culture in Batch System Astrilia Damayanti; Sarto Sarto; Wahyudi Budi Sediawan
International Journal of Renewable Energy Development Vol 9, No 1 (2020): February 2020
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.9.1.37-42

Abstract

Biohydrogen production via dark fermentation is a prospective renewable energy technology. In the process, reused of immobilized mixed culture is very important as their activities greatly influencehydrogen production. The aim of this work was to evaluate the reuse of alginate beads affecting the biohydrogen production for 45 days. This study in batch reactor were performed using glucose 10 M as substrate, alginate and activated carbon as immobilization matrix materials, chicken eggshell as buffer, and cow dung biodigester as mixed culture. Hydrogen and pH on fermentation product are investigated by gas chromatography (GC) technique and pH meter, respectively. The colony diameter on immobilized and co-immobilized mixed culture was observed using optical microscope and colony diameter was measured using Image-Pro Plus Software v4.5.0.29. The surface morphology of immobilization and co-immobilization beads were determined using scanning electron microscope (SEM). The results showed that the colonies growth observed using optical microscopy or SEM was apparent only in the immobilization of mixed culture. The average growth and diameter of colonies per day were 90 colonies and 0.025 mm, respectively. The weight of beads and pH during the 45-day fermentation process for bead immobilization of mixed culture were 1.32–1.95 g and 6.25–6.62, correspondingly, meanwhile, the co-immobilizations of the mixed culture were 1.735–2.21g and 6.25–6.61, respectively. In addition, the average hydrogen volume of glucose fermented using an eggshell buffer and reusing the immobilization and co-immobilization beads was 18.91 mL for 15 cycles.©2020. CBIORE-IJRED. All rights reserved
Comparative Study on the Various Hydrolysis and Fermentation Methods of Chlorella vulgaris Biomass for the Production of Bioethanol Megawati Megawati; Zuhriyan Ash Shiddieqy Bahlawan; Astrilia Damayanti; Radenrara Dewi Artanti Putri; Bayu Triwibowo; Haniif Prasetiawan
International Journal of Renewable Energy Development Vol 11, No 2 (2022): May 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.41696

Abstract

One of the microalgae that can be potentially used to produce bioethanol is Chlorella vulgaris, as it is rich in carbohydrates. However, the carbohydrates in C. vulgaris cannot be converted directly into ethanol. This study aimed to investigate the chemical and enzymatic hydrolysis of C. vulgaris, which is subsequently followed by fermentation. The catalysts used in the chemical hydrolysis were hydrochloric acid, sodium hydroxide, and potassium hydroxide, while the enzymes used were the mixture of alpha-amylase + glucoamylase, alpha-amylase + cellulase, and alpha-amylase + glucoamylase + cellulase. The hydrolysate obtained from chemical hydrolysis was fermented through Separate Hydrolysis Fermentation (SHF), while the one from enzymatic hydrolysis was fermented through Simultaneous Saccharification and Fermentation (SSF), in which both processes used S. cerevisiae. After undergoing five hours of enzymatic hydrolysis (using alpha-amylase + glucoamylase), the maximum glucose concentration obtained was 9.24 ± 0.240 g/L or yield of 81.39%.  At the same time and conditions of the substrate on chemical hydrolysis, glucose concentration was obtained up to 9.23 + 0.218 g/L with a yield of 73.39% using 1 M hydrochloric acid. These results indicate that chemical hydrolysis is less effective compared to enzymatic hydrolysis. Furthermore, after 48 hours of fermentation, the ethanol produced from SHF and SSF fermentation methods were 4.42 and 4.67 g/L, respectively, implying that producing bioethanol using the SSF is more effective than the SHF method.
Extraction from Sweet Orange Peel (Citrus Aurantium var Sinesis), Lemongrass (Cymbopogon Citratus), and Jasmine (Jasminum sambac) as Aromatherapy Candles for Empowerment of Home Economics Astrilia Damayanti; Hanif Ardhiansyah; Harianingsih Harianingsih; Ayasha Maharani; Rahimsyah Ijas Nur Rasyid; Salma Alfahra Choirunisa; Revasha Ajeng Kamalia; Ananda Muthi Athirah
Bubungan Tinggi: Jurnal Pengabdian Masyarakat Vol 6, No 3 (2024)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/btjpm.v6i3.11000

Abstract

The COVID-19 pandemic has affected the residents of Ngijo, a sub-district in Gunungpati District, Semarang. This community service activity aims to empower the Ngijo Family Welfare Development (PKK), Gunungpati, Semarang, as a solution for making aromatherapy candles from waste orange peel, jasmine flowers, and lemongrass. The methods of community service carried out include preparation, outreach, and evaluation. Preparations included signing a letter of cooperation with partners, making aromatherapy candles through six trials where the aroma smelled very good, and socializing with demonstrations where the team explained the consequences of product failure. Posters were given to residents to strengthen their understanding of this activity. The activity's success was seen in the residents' enthusiasm during the question-and-answer session regarding their understanding of making aromatherapy candles. The empowerment of PKK Ngijo, Gunungpati, and Semarang is successful because this activity is exciting and valuable, especially orange peel, which contains essential oils and has a refreshing aroma.
EKSTRAKSI ANTOSIANIN BUNGA DADAP MERAH MENGGUNAKAN METODE MAE (MICROWAVE ASSISTED EXTRACTION) Damayanti, Astrilia; Buchori, Luqman; Sulardjaka, S
Indonesia Journal of Halal Vol. 3 (2) 2020
Publisher : Pusat Kajian Halal Undip

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/halal.v3i2.9424

Abstract

Antosianin merupakan sumber bahan pewarna alami, di mana selain karotenoid, klorofil, dan flavonoid yang dapat dimanfaatkan untuk mendukung performa Dye Sensitized Solar Cells (DSSC) atau sel surya peka warna. Ekstraksi dengan metode Microwave Assisted Extraction (MAE) meningkatkan hasil dan laju reaksi. Penelitian menggunakan metode deskriptif dengan variabel penelitian daya microwave yang bertujuan untuk mengetahui pengaruh daya microwave dalam proses ekstraksi antosanin bunga dadap merah. Hasil penelitian menunjukkan bahwa gelombang mikro dalam microwave mampu mempercepat proses ekstraksi dibutuhkan 12-15 menit dengan daya 300 W, 450 W dan 600 W. Hasil menunjukkan bahwa  total antosianin yang dihasilkan secara berurutan 9,518 mg/L (menit ke-12 daya, 300W); 2,755 mg/L (menit ke-15, daya 450W)  dan 2,839 mg/L (menit ke-12, daya 600W). Ekstraksi antosianin dadap merah menggunakan mikrowave lebih cepat 10 kali dan lebih besar yield 3-10 kali daripada konvensional 180 menit (0,8350 mg/L)
OBSERVASI PENURUNAN TEKANAN (PRESSURE DROP) PADA SISTEM PERPIPAAN: PENGARUH PANJANG DAN DIAMETER PIPA, ELBOW, DAN TEE Nuryoto, Nuryoto; Rahmayetty, Rahmayetty; Yusuf Rumbino; Astrilia Damayanti; Doni Rahmat Wicakso
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1666

Abstract

The piping system is a fundamental process equipment in the industry. The phenomena that occur in piping systems vary depending on the conditions of the pipes and the fluids flowing through them. Therefore, research related to piping systems requires attention to minimize and understand the occurring phenomena. There have been many studies related to piping analysis, but what sets this research apart from previous studies is that it focuses on examining the contribution of each component of the piping system to friction loss-pressure drop. Furthermore, the data obtained is used to determine the deviation or difference between experimental data and theoretical calculations. This research aims to study the correlation between friction loss and pressure drop in piping systems (including pipes, elbows, and tees) and to determine the extent of deviation between theoretical calculations and actual conditions, as well as to understand the trend of such deviations. Results show that as the length of the pipe increases, there is an increase in pressure drop, especially for pipe lengths of 0.6, 0.8, and 1.4 meters, the values are 275.26, 367.0, and 642.27 Pa over density, respectively. Conversely, as the pipe diameter increases, the resulting pressure drop becomes smaller, namely for pipe diameters of 0.5, 0.75, and 1.25 inches, the values are 266.64, 93.33, and 13.33 Pa over density, respectively. In the observation of the influence of fittings, it is shown that the pressure drop generated by elbows is greater than that of tees, with values of 26.66 and 13.33 Pa over density, respectively. When calculating the percentage deviation, there is a tendency for longer pipes and larger diameters will increase the percentage of deviation. For pipe lengths of 0.4, 0.6, and 1.4 meters, the percentage deviations are 3.23, 10.11, and 17.50%, respectively. For variations in pipe diameter, the percentage deviations are 3.23, 41.74, and 47.15% for diameters of 0.5, 0.75, and 1.25 inches, respectively. Meanwhile, the percentage deviation for tees is greater than that of elbows, with values of 84.78% (for elbows) and 185.02% (for tees).
Characterization of corn starch edible films by the addition of chitosan as a vegetable oil packaging material Wicakso, Doni Rahmat; Fortuna, Dwi; Hernadin, Ivan Aldino; Nuryoto, Nuryoto; Rumbino, Yusuf; Damayanti, Astrilia
Konversi Vol 12, No 2 (2023): OKTOBER 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v12i2.15959

Abstract

Abstract - Vegetable oil packaging materials use a type of synthetic polymer that is harmful to the body and the environment. Edible film as an environmentally friendly packaging material can be a solution for vegetable oil packaging material. Edible films are made from natural ingredients such as starch and chitosan. The objective of this study is to determine the best conditions of addition of chitosan in making edible film in terms of its physio-chemicals and determine the best glycerol concentration in terms of its physical properties. The composition of raw materials in the form of corn starch is 5 grams and the composition of chitosan is (0,5%, 1% and 1,5% b/v). Glycerol concentrations vary in (4%, 5% and 6% v/v). the result of the analysis of the physical properties of the edible film through the analysis of the physical tensile strength test, namely the best composition on the addition of 1 gr chitosan as well as the elongation analysis at termination. Analysis of the solubility of the edible film at a concentration of 1 gr as well the analysis of water vapor permeability. Whereas the analysis of the best antioxidant capacity in the composition of chitosan is 1,5 gr. Keywords: corn starch, chitosan, edible film  
Co-Authors Ababil, Devara Candra Abdurrafi, Faishol Ahmed Tessario Ekanuramanta Amalia Larasati Amelia Fitri Ananda Muthi Athirah Anfita Aulia Sakinah Angga Pratama Anggun Enjelita Anggun Septiamurti Ar Rasyid, Moh. Rizal Arie Taveriyanto Artanti Putri, Dewi Ayasha Maharani Ayasha Maharani Ayu Nur Permadhini Bahlawan, Zuhriyan Ash Shiddieqy Bariroh, Siti Bayu Triwibowo Bayu Triwibowo Calista Arsanti Ramadhani Catur Rini Widyastuti, Catur Rini Cyeva Primahasta Desy Hikmatul Siami Dewi Selvia Fardhyanti Dewi, Yasinda Verrel Dinara Shinka Dillah, Shohib Qomad Doni Rahmat Wicakso Eka Sari, Eka Eko Setyawan Endah Ayu Fitriana Eva Amalia Alvionita Eva Amalia Alvionita Fadlurrohman Fadlurrohman Fahreza Pracenda Felicitia Fera Utnita Sari Fitri Nur Kayati Fitriana, Endah Ayu Fitriyani, Winda Risma Fortuna, Dwi Grandis Belva Ardana Hanif Ardhiansyah Haniif Prasetiawan Harianingsih, Harianingsih Harianingsih, Harianingsih Harsya Grezdipa Pratama Hernadin, Ivan Aldino Hutomo , Gayuh Aditya Hutomo, Gayuh Aditya Ima Winaningsih Ima Winaningsih Indrasukma Permanadewi Irene Nindita Pradnya Isaroyati, Luluk Kakalia Putri Auralita Karenina Hakim Kautsar Taqi Imanullah Kevin Thomas Khoridatus Sulwa Krisdayanti , Shendy Kristi, Silvia Yolanda kurniawan, Adhetya Larasati, Amalia Layliyah, Marifatul Luluk Arvi Cahyaning Suwandi Luqman Buchori Luvena Salsabila M Burhan Rubai Wijaya M. Burhan Rubai Wijaya Maftuchan, Maftuchan Magfiroh, Meilina Maharani, Anggun Maulida Zakia Megawati Megawati - Megawati Megawati Megawati Megawati Megawati Megawati Megawati Megawati Megawati Megawati Melanie Hartalia Putrie Miftahuddin Azhari Moh. Rizal Ar Rasyid Muhamad Reihan Prananda Muhammad Fadhlan Dzikri Muhammad Prabu Rizki Noor Ubay, Isnina Nur Kholifah Chandra Mulyani Nur Kholifah Chandra Mulyani Nurkhasanah, Eva Nurul Huda Nurul Khusna Nuryoto Nuryoto Nuryoto Oktaviana, Vira Prasetyo, Ridwan Anung Prayogo, Robby Danang Qurnaini, Rika Alda Radenrara Dewi Artanti Putri Radenrara Dewi Artanti Putri Radenrara Dewi Artanti Putri, Radenrara Dewi Artanti Radenrara Putri Rahimsyah Ijas Nur Rasyid Rahmayetty Rahmayetty Revasha Ajeng Kamalia Reyhan Dwi Saputra Riana Defi Mahadji Putri Ridwan Anung Prasetyo Salma Alfahra Choirunisa Salwa, Dian Fatimatus Sandra Anggita Fadriana Sangeetaprivya P. Siva Sarto Sarto - Sarto Sarto Sarto Serlia Fitri Sadan Siti Bariroh Sri Agustina Sulardjaka, S Syafitri, Laila Taufan Satya Wiguna Triani, Fita Tsani Muftidar Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Waryanto, Arif Wibowo, Muhammad Yusuf Widaya, Adi Risma Widi Astuti Widi Astuti Widi Widayat Widya Sari Kusuma Wijayanti Wijaya, Muhammad Burhan Rubai Yessy Anna Pratiwi Yusuf Rumbino Zulfi Fitriani