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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Teknik Kimia USU 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) Indonesian Journal of Pure and Applied Chemistry SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Angkasa: Jurnal Ilmiah Bidang Teknologi International Journal of Natural Science and Engineering Indonesian Journal of Chemical Analysis (IJCA) JFM (Jurnal Farmasi Malahayati) Jurnal Teknik Kimia Jurnal Inovasi Teknik Kimia ASEAN Journal of Chemical Engineering Equilibrium Journal of Chemical Engineering Journal of Multidisciplinary Applied Natural Science Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Jurnal Teknik Kimia USU Journal of Applied Agricultural Science and Technology Journal of Industrial Community Empowerment Jurnal Pengabdian Pada Masyarakat Jurnal Teknologi Kimia Mineral Journal Of Chemical Process Engineering Jurnal abimana (Jurnal Pengabdian Kepada Masyarakat Nasional)
Variyana, Yeni
Program Studi Teknologi Rekayasa Kimia Industri Politeknik Negeri Lampung
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Ekstraksi Kapulaga (Amomum Cardamomum) Menggunakan Metode Microwave Assisted Hydrodistillation (MAHD) : Analisis Optimasi dan Kinetika Variyana, Yeni; Hanifah, Windia; Wulandari, Yeni Ria; Gelegar, Iyappateya
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 15, No 2 (2023): November
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v15i2.1881

Abstract

Penggunaan microwave-assisted hydrodistillation (MAHD) perlu diterapkan untuk menciptakan green technique pada ekstraksi biji kapulaga (Amomum cardamomum) dari Lampung. Kondisi operasi dengan daya microwave 300, 450, dan 600 W; rasio F/S 0,1; 0,15; 0,2 g/ml; waktu ekstraksi 30,60, dan 90 menit; ukuran bahan baku dihaluskan (serbuk ± 5 mesh). Selanjutnya, optimasi titik optimum dari yield ekstraksi menggunakan Response Surface Methodology (RSM). Dari hasil penelitian melaporkan bahwa ekstraksi minyak kapulaga menggunakan metode MAHD dengan yield tertinggi pada variabel daya microwave 600 W, F/S 0,15 g/ml, dan waktu ekstraksi selama 90 menit sebesar 3,2423%. Penentuan kondisi optimum melalui desain RSM pada ekstraksi minyak kapulaga yaitu 503,650 W, 0,119 g/ml, dan 81 menit sebesar 3,332%. Adanya respon model dari RSM melaporkan bahwa error rates antara data eksperimen dengan nilai prediksi <0,05%. Selain itu, analisis kinetika ekstraksi model kinetika orde satu mampu menggambarkan hasil eksperimen secara efektif dalam proses ekstraksi minyak kapulaga dengan metode MAHD.
Optimization of Ultrasound-Assisted Extraction Parameters from Indigofera Tinctoria L using Response Surface Methodology Achmad Qodim Syafaatullah; Variyana, Yeni; Ni’matur Rohmah; Iid Mufaidah; Ayu Qurota A’yun
Journal of Research and Technology Vol. 7 No. 2 (2021): JRT Volume 7 No 2 Des 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v7i2.450

Abstract

Nowadays, the natural dyes are commonly used in textile industry. One of them is Indigofera tinctoria L leaves extracting natural dyes that produce blue color and have various potential utilization. However, the extraction time required usually takes a long time using conventional extraction. Thus, some researches reported that ultrasound-assisted extraction can accelerate and increase the extraction yield. The mechanism of ultrasonography is able to assist matrix cell rupture through the ultrasound cavitation. The present research aimed to study and to evaluate the Indigofera tinctoria L dye using ultrasound-assisted extraction. Response surface methodology (RSM) in conjunction with box-behnken design (BBD) was applied to optimize and to analyze the extraction conditions. The independent factors were ratio feed to solvent (0.02-0.1 g/ml), ultrasound temperature (50-60oC), and extraction time (50-90 minutes). Further, feed to solvent ratio was the most significant factor of extraction process in comparison with temperature and extraction time. The optimum extraction conditions were 58oC, 0.02 g/ml, and 50 minutes. The predicted model obtained was 6.025% which close to the actual data (5.75%). Moreover, the extract dye compounds were analyzed by FTIR test and the result was 64.07% for presence of Indigo dye. Therefore, the natural dyes can be alternative and sustainable dye as environmentally friendly
EKSTRAKSI SENYAWA FLAVONOID PADA DAUN SIRSAK (ANNONA MURICATA LINN) DENGAN MENGGUNAKAN METODE MICROWAVE ASSISTED EXTRACTION (MAE) Syafaatullah, Achmad Qodim; Setyorini, Dwi; Satria, Muh. Nova; Panjaitan , Renova; Variyana, Yeni
JURNAL TEKNOLOGI KIMIA MINERAL Vol 4 No 2 (2025): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Politeknik ATI Makassaar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61844/jtkm.v4i2.1268

Abstract

Daun sirsak (Annona muricata L.) diketahui mengandung senyawa fitokimia, terutama flavonoid, yang berpotensi sebagai antioksidan dan anti kanker. Senyawa flavonoid dapat diperoleh melalui proses pemisahan seperti ekstraksi dengan memanfaatkan gelombang mikro yang mampu mempercepat proses ekstraksi. Penelitian ini bertujuan menentukan kondisi optimum ekstraksi flavonoid dari daun sirsak menggunakan metode microwave-assisted extraction (MAE). Proses ekstraksi dilakukan pada daya 264 W dan 440 W dengan variasi waktu 30, 45, 60, 75, dan 90 menit. Hasil ekstraksi dianalisis berdasarkan rendemen, kadar flavonoid total, dan identifikasi gugus fungsi melalui FTIR. Kondisi optimum nilai rendemen diperoleh pada daya 440 W selama 30 menit dengan rendemen 20,35 %, sedangkan kadar flavonoid tertinggi mencapai 303,642 ppm pada daya 440 W selama 90 menit. Analisis FTIR menunjukkan adanya pita serapan pada 300–3200 cm⁻¹ yang mengindikasikan gugus hidroksil (–OH) khas senyawa flavonoid.
KARAKTERISASI BIODEGRADABLE FOAM DARI LIMBAH KULIT SINGKONG MENGGUNAKAN PENDEKATAN METODE BIOKATALIS Kurniawan, Dodi; Rezki, Amelia Sri; Wulandari, Yeni Ria; Variyana, Yeni; Silmi, Fadian Farisan
Indonesian Journal of Pure and Applied Chemistry Vol 8, No 3 (2025)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v8i3.98603

Abstract

Biodegradable foam made from natural starch offers a sustainable alternative to Styrofoam, which is lightweight, low-cost, but challenging to degrade and harmful to the environment. The purpose of this study is to utilize cassava peel waste, which contains starch, as a raw material for producing biodegradable foam using a biocatalyst method approach, thereby reducing the presence of cyanide acid in cassava peel waste. Aside from that, Carboxy Methyl Cellulose (CMC) is used as a filler to strengthen the structure of biodegradable foam with mass variations of 4, 6, and 8 g. The characteristic cassava peel flour results showed that the biocatalyst method, achieved through fermentation, can reduce cyanide acid levels in cassava peel flour. Then, a biodegradable foam with the best characteristics was produced by adding 6 g of CMC, resulting in a thickness of 1.9 mm, a water absorption capacity of 17.45%, a tensile strength of 3.13 MPa, and a biodegradation level of 100%. The resulting biodegradable material exhibits a tensile strength that exceeds that of Styrofoam and can disintegrate completely in the soil.
Multi-Objective Optimization of Solvent-Free Microwave Extraction vs. Microwave Hydrodiffusion and Gravity for Amomum compactum Essential Oil Variyana, Yeni; Rahma, Aulia Nabila; Mahfud, Mahfud
Journal of Multidisciplinary Applied Natural Science Vol. 6 No. 2 (2026): Journal of Multidisciplinary Applied Natural Science
Publisher : Pandawa Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47352/jmans.2774-3047.346

Abstract

Amomum compactum essential oil, rich in 1,8-cineole (55–70%), is valued for its therapeutic and aromatic properties but suffers from low yield and thermal degradation in conventional extraction. This study compares and optimizes two green, solvent-free microwave-assisted methods—solvent-free microwave extraction (SFME) and microwave hydrodiffusion and gravity (MHG)—using Box–Behnken Design (BBD) under response surface methodology (RSM). Process variables included feed-to-distiller (F/D) ratio (0.10–0.20 g/mL), microwave power (150–450 W), and extraction time (60–90 min). SFME achieved the highest yield (5.25%) at 300 W, 0.15 g/mL, and 75 min, whereas MHG yielded 2.50% at 150 W, 0.10 g/mL, and 90 min, with superior 1,8-cineole recovery (59.65%) and linalool content (1.98%). Both methods reduced extraction time by 85–95% and energy use by over 90% compared with hydrodistillation, consuming only 0.004–0.006 kWh/g. SEM results confirmed extensive gland rupture (80–90%) and structural breakdown supporting enhanced mass transfer. These findings highlight SFME and MHG as sustainable, energy-efficient innovations aligning with SDGs 9, 12, and 13, advancing the circular bioeconomy and scalable green production of Amomum compactum essential oil.
Pemanfaatan Limbah Cangkang Kemiri Menjadi Briket Ramah Lingkungan melalui Pelatihan kepada KWT Makmur Lestari dan Dharma Wanita KPH Pematang Neba Wulandari, Yeni Ria; Rezki, Amelia Sri; Silmi, Fadian Farisan; Variyana, Yeni; Teguh, Dedi; Hanifah, Windia; Widyaningrum, Sri Rahayu; Shintawati, Shintawati
Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Vol. 6 No. 2 (2026): Maret 2026 - Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59395/altifani.v6i2.950

Abstract

Kegiatan pengabdian masyarakat ini bertujuan untuk meningkatkan pemanfaatan limbah pertanian, khususnya cangkang kemiri, sebagai sumber energi alternatif melalui pelatihan pembuatan briket biomassa. Kegiatan dilaksanakan oleh Tim Pengabdian Masyarakat Politeknik Negeri Lampung (Polinela) di Desa Kedaung, Kecamatan Pardasuka, Kabupaten Pringsewu, yang melibatkan Kelompok Wanita Tani (KWT) Makmur Lestari dan anggota Dharma Wanita KPH Pematang Neba. Pelatihan dilakukan melalui metode edukasi, sosialisasi, demonstrasi, dan praktik langsung, yang mencakup proses karbonisasi, penggilingan, pencampuran perekat, pencetakan, hingga pengeringan briket. Berdasarkan hasil kegiatan, peserta mampu memahami dan mempraktikkan teknik pembuatan briket dari limbah cangkang kemiri secara mandiri. Cangkang kemiri yang sebelumnya hanya menjadi limbah, kini dapat diolah menjadi produk briket dengan nilai kalor tinggi setara batubara sehingga berpotensi mendukung ketahanan energi di tingkat pedesaan. Selain itu, kegiatan ini juga mendorong peningkatan kesadaran masyarakat terhadap pentingnya pemanfaatan energi terbarukan serta memberikan peluang peningkatan ekonomi melalui pemanfaatan limbah bernilai tambah. Dengan demikian, program ini diharapkan menjadi langkah awal dalam pengembangan inovasi energi berkelanjutan berbasis potensi lokal di wilayah pedesaan.
Enhanced Bio-Oil Production from Agricultural Waste via NiCl₂-Assisted Pyrolysis: A Comparative Study of Candlenut and Coffee Shells Wulandari, Yeni Ria; Firmansyah, Muhammad Arif; Variyana, Yeni; Haryono, Tri; Sukma, Vinda Avri; Sudibyo, Sudibyo; Purwanto, Nurjan Didik
Jurnal Kimia Sains dan Aplikasi Vol 29, No 2 (2026): Volume 29 Issue 2 Year 2026
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.29.2.119-131

Abstract

Indonesia’s limited fossil fuel reserves, coupled with increasing national energy demand, highlight the need for alternative and renewable fuel sources. Biomass-derived bio-oil produced through pyrolysis represents a promising solution that can both reduce dependence on petroleum-based fuels and mitigate environmental pollution from underutilized biomass waste. This study investigates the production of bio-oil from candlenut shells and coffee shells through pyrolysis at varying temperatures (250, 350, and 450°C), conducted with and without a NiCl2 catalyst. The bio-oil was characterized for yield, density, and viscosity. The highest bio-oil yields from non-catalytic pyrolysis were achieved at 450°C, amounting to 39.14% for candlenut shells and 41.80% for coffee shells. Catalytic pyrolysis using NiCl2 enhanced the bio-oil yield, producing up to 55.78% (candlenut shells at 450°C) and 58.05% (coffee shells at 350°C). Density measurements showed the highest values in catalytic pyrolysis at 250°C, while the lowest densities were observed in non-catalytic pyrolysis at 450°C. Viscosity followed a similar trend, decreasing with increasing temperature and the presence of the catalyst. FTIR analysis confirmed the presence of functional groups including C–O, C=O, C=C, C≡C, C–H, and O–H. Overall, this study demonstrates the potential of candlenut and coffee shell waste as feasible feedstocks for bio-oil production, offering alternative renewable energy sources for future applications.
Enhancement of Pineapple Industrial Waste Delignification Through the Effect of Microwave Irradiation Duration with Alkali Assistance. Rhea Alvita, Livia; Elsyana, Vida; Hidayat, Rahmat; Saputra, Anggi; Variyana, Yeni; Rustiawan Jody, Rafli
Indonesian Journal of Chemical Analysis (IJCA) Vol. 9 No. 1 (2026): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol9.iss1.art8

Abstract

Delignification is an important step for removing lignin, increasing the accessibility of cellulose and hemicellulose for various industrial applications. This study investigated the effect of microwave irradiation duration on the alkaline-assisted delignification of pineapple peel waste using a Completely Randomized Design (CRD) with irradiation times of 0, 15, 30, and 45 minutes at a constant power of 45 W. Compositional analysis was performed using the Chesson–Datta method, while structural and chemical modifications were evaluated through Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The results indicated that increasing irradiation time significantly improved delignification efficiency (P < 0.05), with the highest lignin reduction of 57.6% achieved at 45 minutes, accompanied by increases in cellulose and hemicellulose contents of 62.79% and 55.8%, respectively. FTIR spectra confirmed the removal of lignin through the reduction of characteristic functional group intensities. Moreover, SEM analysis revealed pronounced structural disruption, increased surface irregularity, and enhanced porosity after treatment, indicating effective breakdown of the lignocellulosic matrix and improved exposure of cellulose fibers. These findings demonstrate that microwave-assisted alkaline treatment is a promising approach for enhancing the valorization of pineapple industry waste.
Co-Authors Achmad Qodim Syafaatullah Afifah, Dian Ayu Agus Triono Amelia Sri Rezki Andika Wahyu Purnama anggi saputra Aphrodita Luthfania Eka Putri Arga Bayramadhan Arga Bayramadhan Ariski Putra, Feby Ayu Qurota A’yun Bayramadhan, Arga Dedi Teguh Dennis Farina Nury Deviany Deviany Devy Cendekia Devy Cendekia Dewi Ermaya Dewi Ermaya Dewi Ermaya Dewi Ermaya Dian Ayu Afifah DIDIK PURWANTO Donny Satria Bhuana Dwi Setyorini Elsyana, Vida Evita Karlina Fadian Farisan Silmi Fahni, Yunita Feerzet Achmad Firmansyah, Muhammad Arif Fitria, Murni Gelegar, Iyappateya Hanifah, Windia Iid Mufaidah Indradewa, Rhian Iyappateya Gelegar Kurniawan, Dodi Kurniawan, Lukman Haris Livia Rhea Alvita Lukman Haris Kurniawan Lutvianto Pebri Handoko M. Mahfud M. Yogi Riyantama Isjoni Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mahfud Mega Arum Ariyani Mochamad Asrofi Muhammad Zulfikar Luthfi Muslimin Nasution Muslimin Nasution Najlaa Ariibah Meutia Nasution, Muslimin Ni&#039;matur Rohmah Ni’matur Rohmah Ni’matur Rohmah Ni’matur Rohmah Nugroho, Muhammad Erwin Cahyo Nurwijayanti Panjaitan , Renova R. A. Ilyas Rahma, Aulia Nabila Rahmat Hidayat Reni Yuniarti Rezki, Amelia Sri Rhea Alvita, Livia Ria Wulandari Rohmah, Ni'matur Rustiawan Jody, Rafli Satria, Muh. Nova Setyo Pambudi Shintawati Shintawati Shintawati Shintawati Shintawati Shintawati Shintawati shintawati, shintawati Sudibyo Sudibyo Sukma, Vinda Avri Syafaatullah, Achmad Qodim Teguh, Dedi Teguh, Dedi Tri Haryono Widyaningrum, Sri Rahayu Yuni Susanti Yuni Susanti Yunita Fahni Zuhdi Ma&#039;sum