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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Journal of Natural Sciences and Mathematics Research Jurnal Sains & Teknologi Lingkungan Jurnal Penelitian Pertanian Terapan Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Indonesian Journal of Pure and Applied Chemistry SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan CHEESA: Chemical Engineering Research Articles Angkasa: Jurnal Ilmiah Bidang Teknologi Indonesian Journal of Chemical Analysis (IJCA) REACTOR : Journal of Research On Chemistry And Engineering Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat Jurnal Teknologi Kimia Mineral Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses Jurnal abimana (Jurnal Pengabdian Kepada Masyarakat Nasional)
Yeni Ria Wulandari
Politeknik Negeri Lampung
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Pengendalian Proses Pada Katalitik Pirolisis Serabut Kelapa Sawit Dengan Menggunakan Reaktor Batch Wulandari, Yeni Ria; Rezki, Amelia Sri; Afifah, Dian Ayu; Hamdi, Rafiqul
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.158

Abstract

Indonesia is the largest producer of palm oil in the world. The palm oil industry always produces solid waste, one of which is palm fiber. Palm fiber can be processed into chemicals or renewable fuels. Catalytic pyrolysis is a pyrolysis process using a catalyst, the purpose of pyrolysis using a catalyst is to upgrade the product. In this study, the pyrolysis process was carried out in a batch reactor with controlled temperature. Catalytic pyrolysis was carried out at a temperature of 400oC with a catalyst to oil palm fiber ratio of 1:2. The control system uses a feedback controller system. Pyrolysis of palm fiber with Al white and NiCl (II) catalysts produces bio-oil products with the highest yield. Pyrolysis with Al2O3 catalyst produces higher Bio-char products. The density of the water phase bio-oil is close to the density of water, and the viscosity of the bio-oil with the oil phase is more than 10 Cp. Based on GC-MS analysis, the largest component in bio-oil is acetic acid. Bio-oil and Bio-char pyrolysis products have the potential as new chemicals, renewable energy and adsorbents.
Sustainable Recovery of SiO₂, Al₂O₃, and MgO from Slag, Aluminum Cans, and Bittern Sukma, Vinda Avri; Dahlan, Astryd Viandila; Sudibyo, Sudibyo; Wulandari, Yeni Ria; Ramandani, Adityas Agung
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 1 (2025): March 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i1.47-58

Abstract

This study investigates the utilization of solid waste from slag and aluminum cans as sources of valuable raw materials, along with bittern waste for magnesium oxide (MgO)cons production. Slag, a byproduct of industrial combustion in the palm oil industry, and aluminum cans, generated from human consumption in urban areas, were both subjected to leaching processes to recover silica (SiO₂) and alumina (Al₂O₃), respectively. The leaching of slag using 4 M NaOH yielded 85.68% SiO₂, while aluminum cans treated with 4 M HCl produced 85.90% Al₂O₃. Additionally, the study extracted MgO from bittern waste via precipitation, resulting in 76.98% MgO. X-ray fluorescence (XRF) analysis was employed used to determine the composition of the slag, aluminum can waste, and bittern, while X-ray diffraction (XRD) analysis confirmed the crystallinity of the recovered materials. The integration of recycled materials into the production of cordierite ceramics represents an innovative approach to waste valorization, offering potential for the development of advanced materials from industrial and urban waste. This research highlights the potential for valorizing industrial and municipal solid wastes through chemical processes, contributing to sustainable resource recovery and environmental conservation.
Optimization of co-firing briquette fuel from coal waste and palm kernel shells: Enhancing energy efficiency and waste valorization Aji, Salomo Pranata; Afifah, Dian Ayu; Silmi, Fadian Farisan; Cendekia, Devy; Wulandari, Yeni Ria; Ramandani, Adityas Agung; Shintawati
Jurnal Rekayasa Proses Vol 19 No 2 (2025): Volume 19, Number 2, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.16419

Abstract

The low-rank coal is increasing every year but still slightly exploited by the industry, due to it being caused by the low-calorie value of the low-rank coal waste. Therefore, the mixture of other biomass is expected to raise the calorie value. This approach could potentially make the low-rank coal more economically viable for use in various industries, especially as a source of energy. Additionally, further research and development in this area could lead to more efficient and sustainable energy production methods. The study uses the Central Composite Design with ratio of low-rank coal waste and palm kernel shells of 40%: 60%, 60%: 40%, and 80%: 20% and variations of the glue starch (5 to 7%), which have been optimized and validated using the Response Surface Method approach. The results of the study showed volatile matter, fixed carbon, and calorie values of 61.43% to 71.69%, 16.56% to 26.98%, and 5190.44 to 6330.40 kcal/g, respectively. The results also demonstrated that the glue with 6% variation showed the highest fixed carbon content and calorie value in comparison to the other variations. The optimum of concentration of low-rank coal and palm kernel shell for co-firing of 80: 20% with 5% glue addition resulting in a volatile matter, fixed carbon, calorie value, flame capacity, flammability, of 54.41%, 33.39%, 6192.123 kcal/g, 14.12 min, and 0.052 g/min, respectively. The validation process also met the requirements for SNI 01-6235-2000 and SNI 8675-2018. Overall, the study concluded that the co-firing of low-rank coal waste and palm kernel shell with glue starch can result in an optimized fuel mixture with high performance characteristics. These findings are significant for industries looking to improve their energy efficiency and reduce emissions.
Advanced oxidation processes technology using the Fenton method in Bakung landfill leachate treatment Teguh, Dedi; Cendekia, Devy; Wulandari, Yeni Ria; Putri, Cynthia Eka; Ramandani, Adityas Agung
Journal of Natural Sciences and Mathematics Research Vol. 10 No. 2 (2024): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.v10i2.20987

Abstract

The primary issue at the Bakung final processing location was the high organic and inorganic material concentration. Toxicity, high chemical oxygen demand (COD), a black hue, and an unpleasant smell can usually identify landfill leachate; it can be hazardous if spilled directly into a body of water. Consequently, the implementation of an efficient leachate treatment was necessary. One use of this cutting-edge oxidation process technology consists of the Fenton method for treating leachate. The goals of this study involve implementing the Fenton technique to leachate treatment and ascertaining the impact of reaction time (30, 60, 90, or 120 min) and Fenton molar ratio (1:150, 1:200, or 1:250) on color degradation and chemical oxygen demand (COD). A Fenton molar ratio of 1:150 and a 120-min reaction period were ideal, resulting in maximum color and COD degradation percentages of 91.4% and 92.4%, respectively. The study's findings demonstrate how well the Fenton approach works to reduce COD and color in leachate while also meeting leachate water quality requirements for enterprises and/or ultimate waste processing operations.
Heating Rate Behaviour Pyrolysis of Empty Fruit Bunches : Kissinger Kinetic Analysis Rezki, Amelia Sri; Wulandari, Yeni Ria; Hanifah, Windia; Oktaviani , Lahara
Indonesian Journal of Chemical Analysis (IJCA) Vol. 8 No. 2 (2025): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol8.iss2.art5

Abstract

Biomass waste such as Empty Fruit Bunches (EFB), a byproduct of palm oil production in Indonesia, represents a promising renewable energy resource. Pyrolysis, a thermochemical conversion process, transforms this waste into valuable products and energy sources. This study uses the Kissinger kinetic model to investigate how a stepwise heating rate analysis, under both catalytic and non-catalytic conditions, influences the pyrolysis behaviour of EFB. Pyrolysis experiments were conducted in a batch reactor at 300 °C, 350 °C, and 400 °C, with and without adding a catalyst (aluminium white) at a 1:2 catalyst-to-feedstock ratio. Heating rates were calculated at 10 °C intervals, and the activation energy (Ea) was determined using the Kissinger kinetic model. The results indicate that, with the presence of a catalyst, the heating rate increases with temperature, while without a catalyst, the rate tends to decrease. Moreover, the catalyst substantially reduces the activation energy, from 12.046 kJ/mol (non-catalytic) to 10.957 kJ/mol (catalytic), indicating its effectiveness in enhancing thermal decomposition and facilitating pyrolysis with lower energy requirements.
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.
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.
Pemanfaatan Limbah Cangkang Kemiri Menjadi Briket Ramah Lingkungan melalui Pelatihan kepada KWT Makmur Lestari dan Dharma Wanita KPH Pematang Neba Yeni Ria Wulandari; Amelia Sri Rezki; Fadian Farisan Silmi; Yeni Variyana; Dedi Teguh; Windia Hanifah; Sri Rahayu Widyaningrum; 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.
ANALISIS KARAKTERISTIK BRIKET DARI LIMBAH BIOMASSA MESOCARP FIBER DAN CANGKANG KEMIRI SEBAGAI BAHAN BAKAR ALTERNATIF Amelia Sri Rezki; Yeni Ria Wulandari; Shitawati Shintawati; Luth Hamam; Endang Palupi Suryaningtyas
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.v4i2.1103

Abstract

Pengembangan penggunaan sumber energi terbarukan yang berkelanjutan dan ramah lingkungan dari biomassa menjanjikan potensi untuk diversifikasi energi. Briket menghasilkan salah satu teknologi konversi limbah biomassa menjadi energi padat, dengan menggunakan berbagai material seperti limbah pertanian dan perkebunan. Mesocarp fiber (MF) dan cangkang kemiri adalah limbah industri yang belum dimanfaatkan secara optimal. Tujuan penelitian ini adalah memanfaatkan limbah MF dan cangkang kemiri sebagai sumber bahan baku produk briket sebagai bahan bakar alternatif dengan analisis karakteristik yaitu kadar air, nilai kalori, laju pembakaran, dan lama penyalaan. Pembuatan briket dilakukan dengan 3 tahapan yaitu proses pengarangan melalui metode pirolisis, pencampuran arang dengan perekat tapioka pada rasio 2:1 (b/v), dan pencetakan briket. Hasil analisis karakteristik briket MF menunjukkan nilai kadar air 3,5%, nilai kalori 6624,9 kal/g, laju pembakaran 2,578 g/detik. Sedangkan briket cangkang kemiri menunjukkan nilai kadar air 2,63%, nilai kalori 4131,33 kal/g, laju pembakaran 5,85 g/detik. Karakteristik briket yang memenuhi mutu SNI 01-6235-2000 adalah nilai kadar air dan nilai kalori pada briket MF, serta kadar air pada briket cangkang kemiri. Limbah biomassa MF memiliki potensi sumber energi terbarukan sebagai bahan bakar alternatif dibandingkan cangkang kemiri. Oleh karena itu untuk meningkatkan kualitas briket diperlukan studi lanjut dalam modifikasi proses pirolisis seperti variasi suhu dan waktu pirolisis.
Pengendalian Proses Pada Katalitik Pirolisis Serabut Kelapa Sawit Dengan Menggunakan Reaktor Batch Yeni Ria Wulandari; Amelia Sri Rezki; Dian Ayu Afifah; Rafiqul Hamdi
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 2 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.158

Abstract

Indonesia is the largest producer of palm oil in the world. The palm oil industry always produces solid waste, one of which is palm fiber. Palm fiber can be processed into chemicals or renewable fuels. Catalytic pyrolysis is a pyrolysis process using a catalyst, the purpose of pyrolysis using a catalyst is to upgrade the product. In this study, the pyrolysis process was carried out in a batch reactor with controlled temperature. Catalytic pyrolysis was carried out at a temperature of 400oC with a catalyst to oil palm fiber ratio of 1:2. The control system uses a feedback controller system. Pyrolysis of palm fiber with Al white and NiCl (II) catalysts produces bio-oil products with the highest yield. Pyrolysis with Al2O3 catalyst produces higher Bio-char products. The density of the water phase bio-oil is close to the density of water, and the viscosity of the bio-oil with the oil phase is more than 10 Cp. Based on GC-MS analysis, the largest component in bio-oil is acetic acid. Bio-oil and Bio-char pyrolysis products have the potential as new chemicals, renewable energy and adsorbents.
Co-Authors Afifah, Dian Ayu Aji, Salomo Pranata Alvita, Livia Rhea Amelia Sri Rezki Amelia Sri Rezki Andika Wahyu Purnama Arief, Febrina Cendekia, Devy Dahlan, Astryd Viandila Damayanti Damayanti Dedi Teguh Dewi Agustina Iryani Dewi Ermaya Dewi Ermaya Dewi Ermaya Dian Ayu Afifah Efendi, Dimas Amirul Mukminin Nur Endang Palupi Suryaningtyas Fadian Farisan Silmi Fernando, Riki Gelegar, Iyappateya Hamdi, Rafiqul Hanifah, Windia Herlambang, M. Julian Ho-Shing Wu Kurniawan, Dodi Luth Hamam Nirmagusitna, Dwi Eva Nita Pita Sari Nurwijayanti Oktaviani , Lahara Purnani, Mawar Siti Putri Andini, Mutia Merry Putri, Cynthia Eka Rafiqul Hamdi Ramandani, Adityas Agung Rezki, Amelia Sri Ricky Fernando Sari, Nita Pita Shintawati Shintawati Shintawati Shintawati Shintawati shintawati, shintawati Shitawati Shintawati Sri Rahayu Widyaningrum Sudibyo Sudibyo Sukma, Vinda Avri Teguh, Dedi Teguh, Dedi Variyana, Yeni Windia Hanifah Yana Sukaryana