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All Journal Jurnal Teknik Kimia Konversi Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Penamas Adi Buana Jurnal Medika Malahayati Industri Inovatif : Jurnal Teknik Industri G-Tech : Jurnal Teknologi Terapan Journal of Sustainable Technology and Applied Science Equilibrium Journal of Chemical Engineering Prosiding SNAST Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri Eduvest - Journal of Universal Studies JASTEN (Jurnal Aplikasi Sains Teknologi Nasional Jurnal Teknik Kimia dan Lingkungan Jurnal ATMOSPHERE

Rini Kartika Dewi

Institut Teknologi Nasional Malang

Author-ID : 296149

Aerospace Engineering Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Other

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Biogas Waste Vegetable Green (Brassica Chinensis Var. Parachinensis) As Alternative Energy Sources Dewi, Rini Kartika; Minah, Faidliyah Nilna; Jimmy, Jimmy; Handraratri, Anitarakhmi
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : CV. Ridwan Publisher

Green mustard (Brassica chinensis var. parachinensis) waste has not been used optimally so it requires proper handling. The solution that can be done is to utilize the waste into biogas. Biogas is energy that can be used by vegetable farmers as lighting, a substitute for kerosene or LPG stoves and the rest of the biogas process can be used as fertilizer to fertilize plants. This research was conducted to determine the effect of the waste mass of Brassica chinensis var. parachinensis (0.5, 1, 1.5 and 2)kg and the length of fermentation time (0,5,10,15, 20) days on the pH and temperature values in biogas production and the mass ratio of vegetable waste and cow dung (1:0, 1: 0.5, 1:1 and 1:1.5)w/w to the volume of biogas produced. From the results obtained from each treatment for the pH value ranging from pH 6-7 and for the resulting temperature ranging from 25 C - 40 C. While the highest volume of gas produced was obtained from the mass of vegetable waste as much as 2 kg with a ratio of vegetable waste and cow dung 1:1.5 with a volume of biogas produced as much as 620 ml.

Making Briquettes From Orange Skin Waste and Sugarcane Bagass using Pyrolysis Method Rini Kartika Dewi; Islami Linda Wibawanti; Heni Rahayu Rahmawati; Nihara Mian Intan Sari Pardede; Tetuko Sigit Hanitanoyo
Eduvest - Journal of Universal Studies Vol. 2 No. 3 (2022): Journal Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

The availability of domestic raw materials is gradually decreasing, while the need for energy sources is increasing. Therefore, it is necessary to have the availability of renewable energy sources, one of which is biomass. In this study, researchers will discuss the waste of sugarcane bagasse and orange peel which can be used as briquettes. Usually, these wastes are only used as animal feed, sometimes they are just thrown away. The goals and benefits expected by the author in this study are, to provide information that the manufacture of briquettes from bagasse and Pacitan orange peel can be used as an alternative fuel. So, it can be implemented to reduce fossil fuels, whose availability is getting less and less. In the study, the best results were on the adhesive variable 20% ratio 1:2 with a calorific value of 5,949,114 cal/gram, 9% moisture content, 9% ash content.

PEMBERDAYAAN MASYARAKAT RT 03 RW 14 SAWOJAJAR KELURAHAN SEKARPURO KECAMATAN PAKIS MELALUI PROGRAM KAMPUNG PRODUKTIF BUAH TIN Rini Kartika Dewi; Srililiani Surbakti; Faidliyah Nilna Minah; M. Istnaeny Hudha; Siswi Astuti
JASTEN (Jurnal Aplikasi Sains Teknologi Nasional) Vol. 1 No. 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Institut Teknologi Nasional Malang

The creative industry is a business activity that focuses on creation and innovation which must always be improved and developed in all regions in Indonesia, because it is rich in culture and natural resources. One example is RT 03 RW 14 Sawojajar Sekarpuro Village, Pakis Subdistrict, which has creative activities, where each resident is required to plant figs and process them. So far, residents still do not know the products that can be produced from tin fruit and the processing stages, all that has been done is making tea bags, but the results obtained are not as expected. The aim of this service is to provide assistance and training for residents of Sawojajar RT 03 RW 14 in processing various foods from fruit and drinks from Tin leaves and transfer of appropriate technology in the process to produce superior products from commercial Tin fruit. The implementation method that will be used is assistance in making products for PKK groups of women who are divided into 5 (five) small groups, mentoring and training for processing into products, assistance in the use of drying equipment, packaging and marketing. From the mentoring and training that has been carried out by the ITN Malang Community Service Team, it has had a significant impact, namely that residents gain knowledge and practice directly the processing of Tin fruit into various processed products and operating equipment in making Tin leaf tea and increasing economic value because residents have produce products and sell them to the public.

Kualitas Biobriket Cangkang Kemiri Melalui Proses Karbonisasi Microwave dengan Bahan Perekat Tepung Gembili (Dioscorea esculenta L) dan Tepung Mbote (Colocasia esculenta) Rini Kartika Dewi; M. Istnaeny Hudha
Jurnal Teknik Kimia dan Lingkungan Vol. 6 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Malang

Biobriket merupakan bahan bakar padat berbasis biomassa yang perlu dikembangkan dan ditingkatkan, mengingat kebutuhan energi pada era sekarang terjadi peningkatan yang signifikan dan diperlukan bahan yang ramah lingkungan sebagai pengganti bahan baku yang tidak dapat diperbaharui. Cangkang kemiri merupakan salah satu bahan yang berpotensi untuk digunakan sebagai bahan bakar padat. Proses pembuatan biobriket pada penelitian ini menggunakan proses karbonisasi microwave pada daya 440 watt, dengan bahan perekat dari tepung gembili (Dioscorea esculenta L.) dan tepung mbote (Colocasia esculenta). Tujuan penelitian ini adalah untuk mengetahui kualitas biobriket cangkang kemiri dengan variasi rasio bahan arang dan perekat sebesar 100:0, 90:10, 80:20, 70:30 dan 60:40% (b/b). Dari penelitian ini, hasil terbaik adalah biobriket dengan perekat tepung gembili pada rasio 70:30% (b/b) dengan nilai kadar air sebesar 4,39%; kadar abu sebesar 4,01%; kadar zat menguap sebesar 9,12%; kadar karbon terikat sebesar 72,78% dan nilai kalor didapatkan sebesar 6875,259 kal/g. Berdasarkan hasil analisa, hampir semuanya masuk dalam Standar Nasional Indonesia (SNI) kecuali karbon terikat yang seharusnya minimal 77%. Biobriquette is a biomass based solid fuel that needs to be developed and improved, considering the energy needs in the current era there is a significant increase and environmentally friendly materials are needed as a substitute for non-renewable raw materials. Candlenut shell is one of the materials that have the potential to be used as solid fuel. The process of making biobriquettes in this study uses a microwave carbonization process at a power of 440 watts, with adhesive materials from gembili flour (Dioscorea esculenta L.) and mbote flour (Colocasia esculenta). The purpose of this study was to determine the quality of candlenut shell biobriquettes with variations in the ratio of charcoal and adhesives of 100:0, 90:10, 80:20, 70:30 and 60:40% (w/w). From this research, the best results were bio briquettes with gembili flour adhesive at a ratio of 70:30% (w/w) with a water content value of 4.39%; ash content of 4.01%, volatile matter content of 9.12%, fixed carbon content of 72.78% and the calorific value of 6875.259 cal/g. Based on the analysis results, almost of them are included in the Indonesian National Standard except for fixed carbon which should be at least 77%.

GANGGUAN PENDENGARAN SENSORINEURAL MENDADAK (SSNHL) PADA PASIEN COVID-19 : TINJAUAN PUSTAKA Krisvalentina, Rossy; Dewi, Rini Kartika
Jurnal Medika Malahayati Vol 8, No 2 (2024): Volume 8 Nomor 2
Publisher : Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jmm.v8i2.14189

COVID-19 adalah penyakit pandemic yang disebabkan oleh virus corona yang berdampak pada saluran pernapasan atas dengan gejala ringan, sedang hingga berat. Virus ini tidak hanya menyerang saluran pernapasan. Namun, dalam kasus tertentu dapat mempengaruhi sistem lain, yakni kardiovaskular, ginjal, gastrointestinal, neurologis, dan pendengaran. Pada organ pendengaran suplai mikrosirkulasi ke telinga bagian dalam dapat terhambat sehingga menimbulkan gejala audiovestibular. Karena telinga bagian dalam rentan terhadap virus. Gangguan pendengaran sensorineural mendadak (SSNHL) dilaporkan terjadi pada orang yang terinfeksi SARSCoV-2, yang mengakibatkan morbiditas jangka panjang dan memperburuk kualitas hidup. Metode penelitian ini dilakukan dengan melakukan penelusuran artikel di Pubmed dan Google Scholar dalam rentang tahun yang telah ditentukan oleh peneliti. Hasil penelitian ini menemukan bahwa untuk mendiagnosa SSNHL dilakukan dengan anamnesis, pemeriksaan fisik dan pemeriksaan penunjang. Selain itu ditemukan bahwa COVID-19 dapat menyebabkan terjadinya SSNHL. Tatalaksana yang cepat dan tepat pada SSNHL diperlukan untuk mendapatkan hasil pemulihan yang optimal.

CHEMICAL DELIGNIFICATION OF MALANG ARABICA COFFEE HUSK WASTE FOR ALTERNATIVE ENERGY Anggorowati, Dwi Anna; Setyawati, Harimbi; Handaratri, Anitarakhmi; Dewi, Rini Kartika; Surbakti, Sriliani
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 6 No. 1 (2025): Journal of Sustainable Technology and Applied Science, May 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v6i1.8131

Malang Regency is an area that has the potential to be the largest coffee producer in Indonesia. The coffee processing in Malang Regency will yield approximately 65% coffee beans and 35% coffee husk waste, resulting in an estimated production of about 3,235 tons of coffee husk waste from a total coffee productivity of 9,245 tons. The coffee husk, a by-product of coffee processing, is a waste that has not been utilized to its full potential. Generally, people only use it for fodder and compost. The coffee husk waste contains a lignin content of 29%, hemicellulose at 24%, and the highest cellulose at 33%. Adequate cellulose content of the material for the manufacture of bioethanol is more than 30%; from the composition of Arabica coffee husk, the cellulose content is more than 30%. So it can be used as an alternative fuel, like bioethanol. This research aimed to reduce the lignin content and increase the cellulose content in coffee husk waste through chemical treatment with NaOH. The research stages involved placing 5 grams of coffee husk powder, sized at 80 mesh, into a glass beaker. Next, 50 ml of NaOH solution with concentrations of 5.0%, 5.5%, 6.0%, 6.5%, and 7.0% (v/v) was added. The sample was put in an autoclave at 121°C for 15, 30, 45, and 60 minutes. The best time was 30 minutes with an NaOH concentration of 7%, with the highest cellulose content obtained; it was 55%.

Optimizing Temperature and Time for Producing Coconut Shell Activated Charcoal to Reduce Free Fatty Acids in Used Cooking Oil Dio Ajeng Oktavian; Rini Kartika Dewi
G-Tech: Jurnal Teknologi Terapan Vol 9 No 1 (2025): G-Tech, Vol. 9 No. 1 January 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/gtech.v9i1.6201

Activated charcoal is a type of carbon that has a high capacity to absorb anions, cations, and molecules in both organic and inorganic compounds, whether in solutions or gases. This research aims to determine the effect of temperature variation and carbonization time on optimizing the production of activated charcoal from coconut shells as an environmentally friendly solution to reduce the acid value in used cooking oil. The activated charcoal production process in this study uses carbonization with temperature variations of 200°C, 250°C, 300°C, and 350°C, and carbonization times of 1 hour, 1.5 hours, 2 hours, 2.5 hours, and 3 hours. The best results for activated charcoal are obtained at 350°C and 3 hours, with moisture content of 0.811%, volatile matter of 5.926%, ash content of 1%, and other parameters that meet the Indonesian National Standard (SNI) for activated charcoal, such as fixed carbon content, iodine absorption capacity in accordance with SNI-06-3730-1995, and an acid value that also meets the standard (SNI 01-3741-2013).

PERSIAPAN DAN KARAKTERISASI PALLADIUM BERBASIS ELEKTROLISIS UNTUK SEL BAHAN BAKAR Chiou, Yuh Jing; Stefandra, Praisela Ivane; Dewi, Rini Kartika
jurnal ATMOSPHERE Vol. 5 No. 2 (2024): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v5i2.13313

This research presents the results of research regarding the preparation and characterization of palladium (Pd)-based electrolytes for applications in fuel cells. In the context of utilizing efficient and environmentally friendly energy sources, Fuel Cells offer an innovative solution by converting chemical energy into electrical energy without a combustion process. This research aims to develop an electrolyte that has high performance, with a focus on analyzing the physical and chemical properties of the resulting electrolyte. The methods used include synthesis of a Pd-based electrolyte and characterization using advanced analytical techniques such as X-ray diffraction (XRD) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The research results show that Pd-based electrolytes have better ionic conductivity and higher stability compared with conventional electrolytes. In addition, variations in operating conditions have a significant effect on fuel cell performance, with the finding that increasing the electrode surface area can effectively increase hydrogen production.

KARAKTERISTIK BIOMASSA DAUN BUNGA SEPATU MENJADI BAHAN BAKAR STERNO GEL Dewi, Rini Kartika; Muyassaroh; Jimmy
jurnal ATMOSPHERE Vol. 2 No. 2 (2021): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v2i2.4301

Sterno gel of hibiscus leaves (Hibiscus rosa-sinensis L.) is an alternative energy source that can be used as fuel because it has non-volatile characteristics, during the combustion process it does not smoke, does not have soot and does not produce harmful and carcinogenic gas emissions and does not have any harmful gases. the impact of emissions on the environment, Inside the hibiscus leaf contains saponins, -sitosterol, stigmasterol, taraxeryl acetate and 3-cyclopropane and their derivatives which will dissolve in both water and ethanol and will form colloids in water. With this composition, the researchers used hibiscus leaf biomass as fuel for sterno gel, where in this study the variables were filtrate mass of hibiscus leaf :10,1 20, 30, 40,50,60 and 70 grams and mass of carbopol :1, 1.5, 2 and 2.5 grams. From the research, it was found that the best burning time was 60 grams of hibiscus filtrate mass and 2.5 grams of carbopol mass, which was 25.02 minutes with the resulting gas emission values of NOx: 4 ppm, SO2: 3 ppm and H2S: 2 ppm. While the calorific value is 3500 calories.

OPTIMALISASI ECENG GONDOK (EICCHORNIA CRASSIPES) SEBAGAI PUPUK ORGANIK CAIR UNTUK PERTANIAN BERKELANJUTAN DAN RAMAH LINGKUNGAN Retnowati, Dewi; Dewi, Rini Kartika
jurnal ATMOSPHERE Vol. 6 No. 1 (2025): ATMOSPHERE
Publisher : Teknik Kimia ITN Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/atmosphere.v6i1.14675

Fertilizer is one of the commodities that can increase plant productivity by adding macro and micro element supplements so that agricultural and plantation products have good quality and quantity. Water hyacinth (Eichornia Crassipes) is a plant that is very adaptable to poor environmental conditions, water hyacinth is easy to find and grows quickly even in waters with low nutrient levels. The implementation of this research is in the Basic Chemistry Laboratory of Chemical Engineering, Faculty of Industrial Technology, Malang National Institute of Technology. This research covers a series of processes starting from the preparation of tools and materials, including the collection of main raw materials such as water hyacinth and nutrients including bean sprouts, banana peels, rice washing water and coconut water, variables, processing stages, fermentation. the variables used are the control variables of 1500 grams of water hyacinth. EM4 bioactivator 250 ml, molasses 500 ml, water 2250 ml, pH 4-9, Temperature 38-45 oC and variable changes fermentation time 14 days, 21 days, 28 days, 35 days, Nutrients rice washing water 500 ml, banana peel 500 grams, coconut water 500 ml, bean sprouts 500 grams. The pH produced an average of 4.0 and a temperature of 27-28 oC NPK nutrients with nutrients Coconut water produces the highest nitrogen of 0.36% on the 35th day, rice washing water produces the highest phosphorus of 0.1239% on the 28th day and banana peel produces the highest potassium of 0.3764% on the 21st day

Co-Authors ., Muyassaroh Anggorowati, Dwi Anna Anitarakhmi Handaratri Chiou, Yuh Jing Dendy Wono Prasetyo Dio Ajeng Oktavian Dwi Ana Anggorowati Elvianto Dwi Daryono Faidliyah Nilna Minah Ferry Darmawan Harimbi Setyawati Heni Rahayu Rahmawati Islami Linda Wibawanti Jimmy Jimmy Jimmy Krisvalentina, Rossy Mohammad Istnaeny Hudha MUYASSAROH Muyassaroh Nanik Astuti Rahman Nihara Mian Intan Sari Pardede Retnowati, Dewi Siswi Astuti Sriliani Surbakti Srililiani Surbakti Stefandra, Praisela Ivane Tetuko Sigit Hanitanoyo

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