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All Journal Jurnal Teknik Kimia USU Eksergi: Chemical Engineering Journal JURNAL INTEGRASI PROSES Jurnal Ilmiah Pangabdhi Konversi Jurnal Penelitian Karet Jurnal Tekno Insentif Jurnal Teknik Kimia USU Journal of Industrial Community Empowerment Communication in Food Science and Technology TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Jurnal Rekayasa Proses Jurnal Bioteknologi & Biosains Indonesia (JBBI) Jurnal Bioteknologi & Biosains Indonesia
Reni Yuniarti
Institut Teknologi Sumatera
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences Other

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Pengaruh Perlakuan Awal terhadap Karakteristik Bioetanol dari Limbah Kulit Singkong Karet (Manihot glaziovii) Yuniarti, Reni; Satria, Arysca Wisnu; Wiandini, Wandha; Zaezarini, Nabhila; Achmad, Feerzet; Yusupandi, Fauzi
Jurnal Teknik Kimia USU Vol. 13 No. 1 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i1.13174

Abstract

Rubber cassava peel waste (Manihot glaziovii) has a high carbohydrate content, so it is feasible to convert it into bioethanol. In general, bioethanol production consists of four steps, pretreatment, hydrolysis, fermentation, and purification. The purpose of this study was to determine the suitable treatment for obtaining bioethanol with the finest characteristics from rubber cassava peel using three treatment variations, the pretreatment process with variations in the dissolving ratio of sodium hydroxide (NaOH) 0.5 M of 1:10; 1:12.5; and 1:15 (w/v), the hydrolysis process with various concentrations of sulfuric acid (H2SO4) of 0.15 N; 0.30 N; and 0.45 N, and the fermentation process with variations in the fermentation time for 3 days, 7 days, and 9 days. Based on the research results, the highest glucose content was 0.91%, with variations in dissolving NaOH 0.5 M 1:15 (w/v) in the pretreatment process and variations in the concentration of 0.30 N H2SO4 in the hydrolysis process, while the highest ethanol content was 68.05% at a fermentation time of 7 days.
Pengaruh Kenaikan Laju Alir Fluida Panas dan Arah Aliran terhadap Kinerja Plate and Frame Heat Exchanger Achmad, Feerzet; Naldi, Roy; Uzlifah Janah, Dikri; Sufra, Rifqi; Yuniarti, Reni
Jurnal Teknik Kimia USU Vol. 13 No. 1 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i1.14321

Abstract

Plate and Frame Heat Exchanger (PFHE) is a plate and frame type heat exchanger that is efficient and effective in improving energy efficiency. Research using PFHE aims to determine the effect of increasing the flow rate of hot fluid on heat exchanger performance. This research was conducted at a flow rate variation of 0.7 L/min, 0.9 L/min, 1.1 L/min, 1.3 L/min, 1.5 L/min, 1.7 L/min, and 1.8 L/min with 180 seconds of testing each variation and recording data every 2 seconds. The cold fluid used is tap water and the hot fluid used is distilled water. The results showed that with the increase in hot fluid flow rate, the performance of PFHE also increased because the effectiveness of NTU (Ɛ-NTU) increased. The Ɛ-NTU value of unidirectional flow is 25.37% - 44.87% and in the opposite direction 37% - 68.39%. The largest Ɛ-NTU value in the countercurrent flow indicates that the countercurrent flow is more effective than the unidirectional flow. In addition, increasing the flow rate increases the Reynold's number (Nre) and Nusselt's number (Nu) which indicates the greatest convection heat transfer occurs at the highest flow rate.
MICROWAVE-ASSISTED EXTRACTION OF TANNIN FROM PAPAYA LEAVES (CARICA PAPAYA LINN): THE EFFECT OF SOLVENT RATIO AND MICROWAVE POWER Glen Bower Vebrianto Siregar; Early Akhalisty Inge Abigail Br Simanjuntak; Desi Riana Saputri; Yunita Fahni; Mustafa Mustafa; Rifqi Sufra; Reni Yuniarti; Fauzi Yusupandi; Faalih Pandu Wicaksono Hadi; Diana Catur Pratiwi; Putri Jesika Adelia; Vania Nur Wahdani; Angeline Nauli; Khofifah Anggitiya Ningrum; Misbahudin Alhanif
JURNAL INTEGRASI PROSES Vol 13, No 1 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i1.24363

Abstract

Papaya leaves (Carica papaya Linn) have many health benefits, such as antibacterial, anti-inflammatory, antidiarrhea, and others. Papaya leaves contain tannins, saponins, alkaloids, triterpenoids, steroids, and flavonoids. The common characteristic of papaya leaves is the green color, which indicates the presence of tannins. The study aims to discover the characteristics of papaya leaf extract, the effect of the solvent ratio, and the microwave power (MP) on the extraction of tannins from the papaya leaves. Papaya leaves are extracted using the microwave-assisted extraction (MAE) method at 100, 140, and 180 W for 30 minutes, with variations in the material to the solvent ratios 1:10, 1:20, 1:30, 1:40, and 1:50. Qualitative tannin testing was carried out through color observation and FeCl3 tests. UV-Vis spectrophotometry was also used to determine the tannin levels obtained during extraction. The FeCl3 test showed that papaya leaf extract contains tannins. The optimal concentration of tannins is produced at a ratio of 1:20, with a 180 W MP of 8.06 mg TAE/g and a yield of 0.81%. MAE can potentially increase the yield of tannins, which is potentially beneficial to health.
Producing chitosan from shellfish waste and its application as a natural coagulant in water purifiers Achmad, Feerzet; Azizah, Rifka Noor; Daulay, Yuliana; Yuniarti, Reni; Suharto, Suharto; Suhartono, Suhartono; Noorsaly, Siti Rizkyna
Konversi Vol 13, No 2 (2024): OKTOBER 2024
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v13i2.19882

Abstract

Waste from simping shellfish (Amusium pleuronectes) shells can pose environmental hazards if waste levels exceed the threshold. This research aims to produce chitosan from shellfish, specifically simping shells, for the purification of raw water. The optimal dosage for both chitosan and alum coagulants in water samples with bay river turbidity (49.5 NTU) is 1 ppm, resulting in a turbidity removal percentage of 99%. The optimum pH for chitosan coagulant (1 ppm) is 6.32, and for alum coagulant (1 ppm) is 8. For bay river water with an initial turbidity of 49.5 NTU, the optimal dose of chitosan coagulant is 1 ppm, achieving a turbidity removal percentage of 99%. Producing chitosan from shellfish waste as a natural coagulant for water purification offers an eco-friendly, cost-effective solution that enhances water quality, reduces seafood industry waste, and provides a safe alternative to chemical coagulants, with potential applications in various fields.
UTILIZATION OF PINEAPPLE PROCESSING LIQUID WASTE IN BIODEGRADATION OF DISPOSABLE FACE MASK BY BACTERIA FROM LAMPUNG BAY Deviany, Deviany; Zhofiroh, Nawrah Meisyah Muthi'ah; Febrina, Yane Fita; Yusuf, Reggina Aulia; Achmad, Feerzet; Yuniarti, Reni; Istiadi, Khaerunissa Anbar
Jurnal Bioteknologi & Biosains Indonesia (JBBI) Vol. 11 No. 2 (2024)
Publisher : BRIN - Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jbbi.2024.8192

Abstract

The designation of COVID-19 as a global pandemic led to an increased use of single-use face masks, which result in waste that is difficult to degrade and has the potential to release microplastic fibers into the environment. This study aims to examine the im-pact of adding pineapple peel liquid waste (LCN) as a growth medium for the biodeg-radation of single-use face masks by bacterial isolates obtained from the waters of the Lampung Bay. The study investigates how LCN affects the efficiency of mask degra-dation by microorganisms, as well as how the ratio of LCN mixed with other growth media, such as Nutrient Broth (NB), influences the degradation process. The biodeg-radation process was carried out using a biostimulation technique, where bacterial iso-lates were incubated in media containing LCN at a 1:1 ratio. The degradation process lasted for 15 days, with the results being analyzed using gravimetry and Fourier-Transform Infrared Spectroscopy (FTIR). Gravimetric results showed a greater weight reduction in treated masks compared to the control masks. FTIR analysis also indicat-ed changes in the intensity of functional groups in the degraded layers of the masks, as well as the emergence of C≡C functional groups in the second and third layers. This study demonstrates that the addition of LCN can accelerate the biodegradation of sin-gle-use face masks, offering a new approach for managing mask waste.
Perbedaan struktur molekul karet alam dengan proses termal koagulan berdasarkan analisis FTIR Achmad, Feerzet; Simbolon, Yusril Mahendra; Sinaga, Kristomi Yahya; Az-Zahra, Syifa; Yuniarti, Reni; Bindar, Yazid
Jurnal Rekayasa Proses Vol 19 No 1 (2025): Volume 19, Number 1, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.11875

Abstract

Rubber is one of the most potential and abundant biological natural resources in Indonesia. This research was conducted to determine the content of compounds contained in rubber after coagulation by means of thermal coagulants. There are 2 (two) thermal coagulants used, traditional using firewood and modern using a laboratory oven. Variations in the weight of the latex used were 0.5 kg, 0.75 kg, 1 kg, 1.25 kg and 1.5 kg. Then the results of the thermal coagulant were subjected to the Fourier Transform Infrared (FTIR) test to see the compound content contained in the rubber. The results of the FTIR test on traditional thermal coagulants at high and medium heat and modern thermal coagulants in the oven showed the typical functional groups of rubber, namely the presence of C-H, C=C and C-C carbon bonds.
Analysis of Vitamin A Content and Antioxidant Test in Super and Bulk Olein Saputri, Desi Riana; Listyadevi, Yuniar Luthfia; Putra, Muhammad Alparidi Pamungkas; Adiwibowo, Muhammad Triyogo; Sanjaya, Andri; Damayanti, Damayanti; Auriyani, Wika Atro; Fahni, Yunita; Yusupandi, Fauzi; Yuniarti, Reni; Safitra, Edwin Rizki
Communication in Food Science and Technology Vol. 3 No. 2 (2024): Communication in Food Science and Technology, November Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Sumatera

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/cfst.v3i2.1980

Abstract

Cooking oil is the essential food for bodies. Cooking oil should be enriched with vitamin A because this substance plays a critical role in maintaining health. Cooking oil contains antioxidant compounds, which inhibit or slow down oxidation reactions. This study aimed to determine the amount of vitamin A in super olein and bulk olein before fortification and the amount of antioxidant content in super olein and bulk olein before fortification. The amount of vitamin A content was obtained using the High-Performance Liquid Chromatography (HPLC) method of <0.005 IU/gram, while the antioxidant test results were carried out by the 2,2-Diphenyl-1-picrylhydrazyl (DPPH) method using UltraViolet-Visible Spectrophotometry (UV-Vis). The resulting antioxidant activity has an inhibition value of 23% and 10% in bulk and super olein, respectively. Cooking oil is the essential food for bodies. Cooking oil should be enriched with vitamin A because this substance plays a critical role in maintaining health. Cooking oil contains antioxidant compounds, which inhibit or slow down oxidation reactions. This study aimed to determine the amount of vitamin A in super olein and bulk olein before fortification and the amount of antioxidant content in super olein and bulk olein before fortification. The amount of vitamin A content was obtained using the High-Performance Liquid Chromatography (HPLC) method of <0.005 IU/gram, while the antioxidant test results were carried out by the 2,2-Diphenyl-1-picrylhydrazyl (DPPH) method using UltraViolet-Visible Spectrophotometry (UV-Vis). The resulting antioxidant activity has an inhibition value of 23% and 10% in bulk and super olein, respectively.
KAJIAN PROSES KOAGULASI LATEKS KARET ALAM SECARA TERMAL MEMBENTUK PRODUK PADAT CACAHAN Achmad, Feerzet; Simbolon, Yusril Mahendra; Sinaga, Kristomi Yahya; Yuniarti, Reni; Bindar, Yazid
Jurnal Penelitian Karet JPK : Volume 43, Nomor 1, Tahun 2025
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v43i1.945

Abstract

Karet alam adalah salah satu komoditi perkebunan yang memiliki peranan penting dalam hal perekonomian negara. Karet merupakan salah satu sumber daya alam hayati yang sangat potensial dan berlimpah di Indonesia. Penelitian ini bertujuan untuk mengetahui pengaruh termal koagulan terhadap proses koagulasi, waktu koagulasi, laju kalor yang digunakan untuk termal koagulan, dan analisis termal koagulan. Terdapat 2 termal koagulan yang digunakan yaitu termal koagulan secara tradisional (TKT) dengan menggunakan kayu bakar dan termal koagulan secara modern (TKM) dengan menggunakan oven laboratorium. Termal koagulan dilakukan dengan variasi berat lateks 0,5 kg, 0,75 kg, 1 kg, 1,25 kg, dan 1,5 kg pada temperatur TKT api sedang 600C – 1000C, temperatur api besar 1100C–1500C dan temperatur TKM 1450C. Hasil penelitian diperoleh termal koagulan dapat menggumpalkan lateks. Termal koagulan diperoleh waktu termal TKT lebih cepat dibandingkan dengan TKM. Kalor yang dihasilkan untuk TKM lebih besar dari kalor yang dihasilkan oleh TKT, dan semakin besar variasi berat lateks, semakin banyak kalor yang dihasilkan untuk koagulan termal. Laju kalor TKM lebih tinggi dibandingkan dengan laju kalor TKT, dan semakin besar nilai variasi berat lateks maka semakin rendah pemanasan yang dihasilkan. Koagulasi termal ini dapat membantu masyarakat petani karet untuk menggumpalkan lateks secara lebih ekonomis dan efisien, dan bahwa termal koagulan ini mengarah pada produksi karet sebagai bahan baku yang disimpan dalam bentuk padat untuk proses depolimerisasi dengan pirolisis menjadi bentuk hidrokarbon terbarukan.
Production of Fragrance Tag (Paper-Based Air Fresheners) from Agarwood Powder Waste (Aquilaria malaccensis) Yuniarti, Reni; Wardani Putri, Elfira; Sida Mubin, Abror; Achmad, Feerzet
Eksergi Vol 22 No 3 (2025)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v22i3.15114

Abstract

Agarwood is a non-timber forest product known for its distinctive fragrance. Its processing generates powder waste that is often undervalued and underutilized, despite containing aromatic compounds with potential for value-added products such as fragrance tags. This study aimed to determine the optimal composition of agarwood powder and waste paper, assess the effects of NaOH treatment on product characteristics, and evaluate economic feasibility. The process involved preparing agarwood and HVS paper waste, treating with or without NaOH, producing pulp at ratios of 75:25, 50:50, and 25:75 (% w/w), and adding essential oil. Results showed that NaOH treatment significantly improved physical and sensory properties such as color brightness, grammage, and tensile strength but reduced thickness, absorbency, and aroma retention. Material ratio also influenced performance: 25:75 (% w/w) with NaOH yielded the best color and tensile strength, while 75:25 without NaOH showed the highest thickness, absorbency, and aroma stability up to day 5. Economic analysis indicated feasibility, with a break-even point of 181 units, a return cost ratio (RCR) of 1.44, and a payback period of 2.27 months.
Pengolahan Kelapa Menjadi Virgin Coconut Oil (VCO) dengan Metode Fermentasi Sederhana Nury, Dennis Farina; Fahni, Yunita; Yuniarti, Reni; Achmad, Feerzet; Deviany; Variyana, Yeni
Journal of Industrial Community Empowerment Vol. 2 No. 2 (2023)
Publisher : Politeknik ATI Padang

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

Abstract

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 AA Sudharmawan, AA Aldillah Herlambang Amelia, Devita Andri Sanjaya Angeline Nauli Auriani, Wika Atro Auriyani, Wika Atro Ayu Pratiwi, Ayu Az-zahra, Syifa Azizah, Rifka Noor Damayanti Damayanti Daulay, Yuliana Dennis Farina Nury Desi Riana Saputri Deviany Deviany Deviany, Deviany Diana Catur Pratiwi Dyra Raihan Fauziah Early Akhalisty Inge Abigail Br Simanjuntak Faalih Pandu Wicaksono Hadi Fahni, Yunita Fauzi Yusupandi Febrina, Yane Fita Feerzet Achmad Fikrah, Faizatul Glen Bower Vebrianto Siregar Hukama, Ikhwan Ikhlas, Fikri Rahmatul Jabosar Ronggur Hamonangan Panjaitan Jayawarsa, A.A. Ketut Khaerunissa Anbar Istiadi Khofifah Anggitiya Ningrum Lisa Angraini Lisnurani, Lisnurani Listyadevi, Yuniar Luthfia Marlina, Titi Misbahudin Alhanif Muhammad Alfarizi Tazkia Muhammad Triyogo Adiwibowo Mustafa Mustafa Naldi, Roy Napitupulu, Lukas Fernando Noorsaly, Siti Rizkyna Putra, Muhammad Alparidi Pamungkas Putri Jesika Adelia Qarimah, Akhlatul Rahmadini, Gustia Rifqi Sufra Safitra, Edwin Rizki Saputri, Desi Riana Satria, Arysca Wisnu setiawan, Darma Sida Mubin, Abror Simanjuntak, Tiurmaida Gebryela Simbolon, Yusril Mahendra Sinaga, Kristomi Yahya SUHARTO Suharto Suharto Suharto Suharto Suhartono Suhartono Tambunan, Yonathan Marasi Uzlifah Janah, Dikri Vania Nur Wahdani Variyana, Yeni Wahyu Saputri, Laila Wardani Putri, Elfira Wiandini, Wandha Yazid Bindar Yuniar Luthfia Listyadevi Yunita Fahni Yusuf, Reggina Aulia Yusupandi, Fauzi Zaezarini, Nabhila Zega, Fidel Abdiman Zhofiroh, Nawrah Meisyah Muthi'ah