Garuda - Garba Rujukan Digital

p-Index From 2019 - 2024

2.644

P-Index

This Author published in this journals

All Journal Jurnal Teknik ITS IPTEK The Journal for Technology and Science CHEMICA Jurnal Teknik Kimia Journal Of Chemical Process Engineering (JCPE) Journal of Research and Technology JRST (Jurnal Riset Sains dan Teknologi) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan ASEAN Journal of Chemical Engineering Equilibrium Journal of Chemical Engineering Jurnal Teknik Kimia USU Journal of Applied Agricultural Science and Technology Journal of Industrial Community Empowerment Jurnal Teknologi Kimia Mineral

Variyana, Yeni

Politeknik Negeri Lampung

Author-ID : 1033829

Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Nursing Public Health Social Sciences Other

Published : 19 Documents Claim Missing Document

Claim Missing Document

Articles

1 2

Optimasi Ekstraksi dari capsicum frutescens L dengan Microwave-Assisted Soxhlet Extraction (MASE) Menggunakan Response Surface Methodology (RSM) Yeni Variyana; Yuni Susanti
JRST (Jurnal Riset Sains dan Teknologi) Volume 5 No. 2 September 2021: JRST
Publisher : Universitas Muhammadiyah Purwokerto

Capsicum Frutescens L. memiliki senyawa aktif berupa rasa pedas yang disebut capsaicin. Senyawa ini telah banyak dimanfaatkan di berbagai sektor industri dan farmasi. Proses pengambilan senyawa melalui ekstraksi dengan microwave-assisted soxhlet extraction (MASE). Pada penelitian ini menggunakan parameter siklus ekstraksi (2, 6, 10 siklus), daya microwave (300, 450, 600 W) dan massa cabai rawit (20, 60, 100 g). Parameter tersebut didesain berdasarkan optimasi response surface methodology (RSM). Hasil penelitian menunjukkan bahwa yield ekstraksi tertinggi pada kondisi 6 siklus, 400 W, dan 20 g sebesar 7,7285. Kemudian model optimasi menunjukkan 6,33 siklus, 405,33 W dan 20,46 g sebagai yield tertinggi dengan hasil 7,7708. Kedua hasil tersebut menyatakan bahwa persentase kesalahan antara data penelitian dengan model optimasi yaitu <0,05%. Selanjutnya, analisis varian (ANOVA) memberikan respon signifikan berdasarkan p-value <0,01%. Respon ini mengindikasikan bahwa parameter-parameter yang telah didesain oleh RSM dapat digunakan sebagai model untuk mengetahui titik-titik optimum dan yield tertinggi. Selain itu, hasil ekstrak dilakukan analisis menggunakan spektrofotometer UV-VIS dan SEM energy dispersive x-ray (EDX) untuk mengetahui panjang gelombang dan morfologi capsaicin.

PELATIHAN PEMBUATAN PROCESS FLOW DIAGRAM (PFD) MENGGUNAKAN APLIKASI VISIO DI SMKN 8 BANDAR LAMPUNG Yeni Ria Wulandari; Yeni Variyana; Dedi Teguh; Amelia Sri Rezki; Fadian Farisan Silmi; Dewi Ermaya; Shintawati Shintawati; Andika Wahyu Purnama
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 7, No 1 (2023): March
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v7i1.13512

ABSTRAKPengembangan pendidikan Sekolah Menengah Kejuruan (SMK) di Indonesia harus diarahkan untuk beradaptasi dengan dinamika global dan nasional khususnya terhadap Revolusi Industri 4.0. Berdasarkan penerapan Kurikulum Merdeka, program keahlian yang ada di SMK Negeri 8 Bandar Lampung salah satunya adalah Teknik Kimia Industri dengan peserta sebanyak 25 orang. Adapun tujuan dari kegiatan pengabdian kepada masyarakat (PKM) yaitu memberikan pelatihan desain process flow diagram (PFD) menggunakan microsoft visio kepada siswa jurusan teknik kimia di SMKN 8 Bandar Lampung. Pengetahuan, keterampilan, dan pengalaman dalam merancang proses pabrik secara sederhana maupun kompleks sangat diperlukan di dunia industri, khususnya bidang keahlian teknik kimia. Dari hasil pelatihan, seluruh peserta sangat antusias dan dapat menyelesaikan desain PFD hingga selesai serta beberapa siswa aktif bertanya terkait materi yang diberikan. Para peserta dengan persentase 98% menyatakan bahwa adanya peningkatan pengetahuan dan keterampilan terkait pembuatan proses industri fermentasi melalui PFD. Kegiatan ini diharapkan dapat menambah keterampilan siswa jurusan teknik kimia SMKN 8 Bandar Lampung agar siap menjadi sumber daya manusia (SDM) unggul. Kata kunci: PKM; microsoft visio; PFD. ABSTRACTThe development of Vocational High School education in Indonesia must be directed to adapt to global and national dynamics, especially to the Industrial Revolution 4.0. Based on the implementation of the Merdeka Curriculum, one of the expertise programs in SMK Negeri 8 Bandar Lampung is Industrial Chemical Engineering with 25 participants. The purpose of this community service activity (PKM) is to provide process flow diagram (PFD) design training using microsoft visio to students majoring in chemical engineering at SMKN 8 Bandar Lampung. The knowledge, skills, and experience in designing simple and complex plant processes are needed in the industrial world, especially in the field of chemical engineering expertise. From the results of the training, all participants were very enthusiastic and were able to complete the PFD design to completion and some students actively asked questions regarding the material provided. The participants with a percentage of 98% stated there was an increase in knowledge and skills related to making industrial fermentation processes through PFD. This activity is expected to increase the skills of students majoring in chemical engineering at SMKN 8 Bandar Lampung so that they are ready to become excellent human resources (HR). Keywords: PKM; microsoft visio; PFD.

Response Surface Methodology-Based Parameter Optimization of Candlenut Seeds Extraction (Aleurites moluccana Willd) Yeni Variyana; Dewi Ermaya; Shintawati Shintawati; Devy Cendekia; Mahfud Mahfud
Equilibrium Journal of Chemical Engineering Vol 7, No 1 (2023): Volume 7, No 1 July 2023
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i1.72842

ABSTRACT. Aleurites moluccana Willd, known candlenut plant, has the potential to be used for vegetable oil, pharmacological purposes, and biofuel. However, there is a lack of knowledge on the optimal extraction conditions for this extraction. The current study aimed to use response surface methodology (RSM) to optimize the Microwave Hydrodiffusion Gravity (MHG) conditions for extraction yield. A three-factor-three-level Box-Behnken design (BBD) was used to investigate the effects of three independent parameters: material size (A), microwave power (B), and extraction time (C). The experimental data for the candlenut seed extraction were analyzed to obtain quadratic polynomial equations. The effects of various parameters on the yield of extraction yield were then examined and analyzed using plots and contours.The results showing extraction yield significantly influenced all independent parameters were p < 0.0001. Further, The study predicted the optimum conditions for extracting candlenut seeds, which included using material size in 1.378 cm, microwave power of 599.359 W, and extraction time 66.076 min, resulted yield of 5.015%. Based on experimental data conditions, the highest extraction yield was 5.5% of 1 cm, 600 W, and 60 min, respectively, which were in good agreement with the predicted model. The study concluded that the optimized MHG method could be useful in industrial extraction processes and the use of statistical method can optimize the extraction process and reduce the number of experiments required.Keywords: candlenut, RSM, MHG, yield

PENGARUH WAKTU DAN SUHU MASERASI TERHADAP STRENGTH GEL KARAGINAN Eucheuma Cottonii DENGAN NaOH SEBAGAI PELARUT Dwi Setyorini; Achmad Qodim Syafaatullah; Yeni Variyana
JURNAL TEKNOLOGI KIMIA MINERAL Vol 1 No 2 (2022): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Unit Penelitian dan Pengabdian Kepada Masyarakat Politeknik ATI Makassaar

Eucheuma cottonii merupakan salah satu jenis rumput laut yang paling banyak diproduksi di Indonesia. Tingginya angka penjualan rumput laut Eucheuma cottonii dalam bentuk bahan mentah, mengakibatkan diperlukannya pengolahan lebih lanjut untuk meningkatkan nilai jualnya. Salah satu produk rumput laut yang diminati yaitu karaginan yang dapat dimanfaatkan oleh industry pangan maupun non pangan karena dapat digunakan sebagai penstabil, pengemulsi, maupun gelatasi. Untuk mendapatkan karaginan, perlu dilakukan proses lanjutan yaitu ekstraksi. Terdapat berbagai jenis metode ekstraksi salah satunya yaitu maserasi (perendaman). Sebelum dilakukan maserasi, rumput laut sebaiknya dibersihkan dari kotoran – kotoran yang menempel untuk menghindari adanya kontaminasi sekaligus meningkatkan nilai kualitasnya. Solvent yang digunakan untuk proses maserasi sebaiknya merupakan solvent yang bersifat alkali, salah satunya yaitu NaOH. Waktu maserasi yang digunakan dalam penelitian ini yaitu selama 1 jam, 2 jam dan 3 jam. Sedangkan variasi suhu yang digunakan yaitu 60oC, 70oC dan 80oC. Hasil maserasi selanjutnya dikeringkan dan direduksi ukurannya. Untuk mengetahui kualitas dari karaginan yang dihasilkan, maka dilakukan Analisa viskositas dan strength gel. Dari penelitian ini dapat diketahui bahwa nilai strength gel akan berbanding terbalik dengan viskositas. Karaginan dengan mutu terbaik, dihasilkan melalui proses maserasi menggunakan NaOH pada suhu 70oC selama 1 jam dengan nilai strength gel nya sebesar 575 gr/cm2 dan viskositasnya 227 cp.

PERBANDINGAN YIELD EKSTRAKSI PIPERIN PIPER NIGRUM L. DENGAN MENGGUNAKAN EKSTRAKSI KONVENSIONAL DAN MICROWAVE Fadian Farisan Silmi; Yeni Variyana; Shintawati
JURNAL TEKNOLOGI KIMIA MINERAL Vol 1 No 2 (2022): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Unit Penelitian dan Pengabdian Kepada Masyarakat Politeknik ATI Makassaar

Piperin merupakan zat aktif yang terdapat dalam buah lada hitam (Piper nigrum L.). Zat aktif tersebut banyak digunakan di industri makanan dan farmasi. Pengambilan piperin biasanya menggunakan proses ekstraksi dari oleoresin ekstrak. Pada penelitian, material menggunakan media pemanas yaitu microwave dan heater. Parameter ekstraksi yang ditentukan adalah massa bahan baku sebanyak 50 gr, feed to solvent (F/S) adalah 1:4 dan 1;6, serta volume KOH sebanyak 50 mL untuk mengikat kristal piperin dalam ekstrak. Hasil penelitian pada rasio F/S 1:4 dan 1:6 secara berturut-turut didapatkan yield ekstraksi piperin dari lada (Piper nigrum L.) menggunakan microwave 2,56 dan 2,91 kali lebih tinggi dibandingkan konvensional (heater). Sedangkan meningkatnya jumlah volume etanol yang digunakan pada ekstraksi piperin dapat menurunkan perolehan yield sebanyak 11,27% dan 21,54% untuk setiap 100 mL etanol. Titik leleh kristal piperin terjadi pada suhu 120 oC dengan titik leleh sempurna kristal piperin terjadi pada suhu 150 oC.

TEKNOLOGI EKSTRAKSI MINYAK BAWANG BOMBAI (ALLIUM CEPA L.) MENGGGUNAKAN METODE MICROWAVE HYDRO-DIFFUSION GRAVITY (MHG) DAN SOXHLET Yeni Variyana; Dian Ayu Afifah; Dwi Setyorini; Achmad Qodim Syafaatullah
JURNAL TEKNOLOGI KIMIA MINERAL Vol 2 No 1 (2023): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Unit Penelitian dan Pengabdian Kepada Masyarakat Politeknik ATI Makassaar

Umumnya, bawang bombai (Allium cepa L.) diekstraksi sebagai bahan penyedap masakan dan obat-obatan. Akan tetapi, proses ekstraksi masih terbatas pada yield yang dihasilkan dengan metode tradisional. Pada penelitian ini digunakan metode ekstraksi microwave hydro-diffusion and gravity (MHG) untuk mengevaluasi bagaimana mempengaruhi yield minyak yang dihasilkan dari bawang bombai. Selain itu, adanya metode sokletasi sebagai teknik ekstraksi konvensional sebagai pembanding terhadap kinerja dan kuantitas ekstrak. Selanjutnya, metode ekstraksi MHG tidak memerlukan penggunaan pelarut, melainkan menggunakan air yang terdapat di dalam material sebagai pelarut internal. Dalam penelitian ini, bawang bombai diperlakukan dengan dua (2) cara yaitu dengan penjemuran sinar matahari (sun dying) selama 1 hari dan tanpa pretreatment. Parameter ekstraksi dengan MHG digunakan daya microwave sebesar 600 W, waktu ekstraksi 75 menit, dan ukuran material 1 cm. Hasil penelitian menunjukkan yield lebih tinggi diperoleh dari bahan melalui sun drying sebesar 2,78% dibandingkan dengan bahan yang tidak di pretreatment yaitu 1,76%. Hasil recovery minyak yang dihasilkan dari metode soxhlet sebesar 4,98% selama 5 jam. Oleh karena itu, metode MHG dapat dijadikan sebagai salah satu metode ekstraksi yang ramah lingkungan, waktu ekstraksi lebih cepat, dan konsumsi energi yang lebih sedikit sehingga dapat diterapkan pada skala yang lebih besar.

Extraction of Vegetable Oil from Candlenut Seeds (Aleurites Moluccana L. Willd.) Using the Microwave Hydrodiffusion and Gravity (MHG) Method Yeni Variyana; Amelia Sri Rezki; Dewi Ermaya; Mahfud Mahfud
Journal of Chemical Process Engineering Vol 8, No 1 (2023)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jcpe.v8i1.1555

The microwave hydriffusion gravity (MHG) method is a relatively new extraction method in order to improve the quality of oil obtained from plant materials or spices. The extraction process is carried out without involving solvents so it is safe for consumption. However, the MHG method has never been applied to the extraction of candlenut (Aleurites moluccana L) seeds. The operating conditions and variables in the research on the extraction process of Aleurites moluccana L are microwave power (300; 450; 600 W), extraction time (15-75 minutes) with 15-minute intervals, material size (1;2;3 cm), mass of raw material 100 gr, and atmospheric pressure. Material treatment consisted of 3 types of material conditions including seed material which had been roasted for 10 minutes over low heat, seed material which had been in the oven for 45 minutes, and seed material which had been without pretreatment. The results of the oil extract were analyzed using GC-MS to identify the components of the constituent compounds. Then, evaluating the mathematical modeling of the extraction process is based on first and second order kinetics. Roasted material showed the highest yield with material size parameter in 1 cm, microwave power of 600 W, and extraction time at 30 minutes, produced 5.55% (%w/w). Furthermore, the pyrazine component (36.814%) is the largest compound from the extraction of Aleurites moluccana. The first-order kinetic model has a regression that is close to the experiment with (R2 = 0.9453). Modeling quality is also supported by a very small total sum of squares (SST) value of 6,44E10-4. Therefore, the MHG method is quite effective in producing Aleurites moluccana oil with better quantity and quality

Extraction of Java Lemongrass (Cymbopogon citratus) Using Microwave-Assisted Hydro Distillation in Pilot Scale: Parametric Study and Modelling Yeni Variyana; Zuhdi Ma'sum; Donny Satria Bhuana; Mahfud Mahfud
ASEAN Journal of Chemical Engineering Vol 23, No 2 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.79220

This study aims to extract oil from Java lemongrass (Cymbopogon citratus) using the pilot-scale Microwave-Assisted Hydro distillation method (distiller volume 10,000 mL). The operating variables of this research are the extraction time, the microwave power, and the ratio of the mass of the material to the solvent (F/S ratio). The results showed an increase in the yield of lemongrass oil along with the increase in extraction time using the Microwave-Assisted Hydro distillation (MAHD) method, and this trend will continue to occur as microwave heating is selective and volumetric. Thus, there is a tendency to increase yield with increasing power. In general, it follows that the higher the power, the higher the yield. The energy received by the material to be converted into heat has caused the essential oil yield to be more abundant, with the highest yield being obtained at 800 W. The increase in the material to solvent ratio increased the oil yield up to a certain point. However, the yield started declining after the F/S ratio of 0.08 was reached. The first order kinetic model well represents the extraction process at a pilot scale. The pilot scale's oil yield is slightly lower than the laboratory scale MAHD. Compositional analysis of the result suggests that the main components of Java lemongrass oil are Geranial (30.06%), Z-Citral (25.88%), Eugenol (12.88%), and Beta-Myrcene (12.84%).

Pengolahan Kelapa Menjadi Virgin Coconut Oil (VCO) dengan Metode Fermentasi Sederhana Dennis Farina Nury; Yunita Fahni; Reni Yuniarti; Feerzet Achmad; Deviany Deviany; Yeni Variyana
Journal of Industrial Community Empowerment Vol 2, No 2 (2023): Published in October 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v2i2.215

Coconut plant is frequently referred to as the plant of life since every part of it may be utilized and turned into a product. One of the commercial processed product by coconut is virgin coconut oil (VCO), which has many benefits to health properties. VCO is extracted from coconut milk from coconut fresh. The introduction of virgin oil (VCO) to partners aimed about VCO's advantages and development of appropriate technology that can be applied to local communities in Negeri Katon, Lampung Selatan. This community service activity program introduced fermentation method using yeast to convert coconut milk into VCO. The activity were conducted in three steps: i.e presentation of VCO process production and discussion, demonstration of making VCO together, and evaluation based on pre and post-test form results. Several analysis have been conducted including the percentage yield, density, viscosity and pH of the VCO. The evaluation of this activity was obtained from pre and post-test results. The results of the pre-test showed that among 50% the people of Negeri Katon really needs to the activity of making VCO by fermentation together. Based on the highest post-test result of 91%, it can be concluded that the VCO-making activities are very useful. Further development of activities, such as intensive practice in making VCO and training in packaging and selling VCO is very needed. Based on the results obtained, it can be concluded that the activity of making VCO by fermentation for the community of Negeri Katon is very necessary to be carried out in terms of utilizing coconut into VCO and creating business opportunities for the future.

Co-Authors Achmad Qodim Syafaatullah Achmad Qodim Syafaatullah Agus Triono Amelia Sri Rezki Andika Wahyu Purnama Arga Bayramadhan Arga Bayramadhan Ayu Qurota Aâ€™yun Bayramadhan, Arga Dedi Teguh Dennis Farina Nury Deviany Devy Cendekia Dewi Ermaya Dewi Ermaya Dewi Ermaya Dian Ayu Afifah Donny Satria Bhuana Dwi Setyorini Dwi Setyorini Fadian Farisan Silmi Fadian Farisan Silmi Feerzet Achmad Iid Mufaidah Kurniawan, Lukman Haris Lukman Haris Kurniawan Lutvianto Pebri Handoko Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mochamad Asrofi Muslimin Nasution Muslimin Nasution Nasution, Muslimin Ni'matur Rohmah Niâ€™matur Rohmah Ni’matur Rohmah R. A. Ilyas Reni Yuniarti Rohmah, Ni'matur Setyo Pambudi Shintawati Shintawati Shintawati Shintawati Shintawati Yeni Ria Wulandari Yuni Susanti Yuni Susanti Yunita Fahni Zuhdi Ma'sum

Title

Found 19 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 19 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 19 Documents
Search