Article Per Year (5 Year)
p-Index From 2020 - 2025
3.313
P-Index
This Author published in this journals
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

Published : 23 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 23 Documents
Search

 1   2   3 
STUDI KINETIKA EKSTRAKSI MINYAK GAHARU DENGAN KOMBINASI FERMENTASI Dyra Raihan Fauziah; Arysca Wisnu Satria; Reni Yuniarti
JURNAL INTEGRASI PROSES Vol 11, No 2 (2022)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jip.v11i2.14640

Abstract

Gaharu adalah salah satu tanaman penghasil minyak atsiri yang banyak dijumpai di berbagai wilayah dan tipe hutan di Indonesia. Pemilihan gaharu sebagai bahan penelitian karena gaharu memiliki nilai komersial yang tinggi dan untuk memperoleh minyaknya cukup sulit. Penelitian ini bertujuan untuk mengetahui pengaruh perlakuan fermentasi terhadap hasil rendemen (yield) minyak gaharu. Percobaan ini didahului dengan persiapan bahan yaitu: pencacahan, penghalusan, dan pengeringan. Selanjutnya dilakukan proses ekstraksi dengan metode sokletasi menggunakan pelarut n-heksana. Data hasil rendemen dan kandungan asam lemak bebasnya dianalisis guna mengetahui kondisi proses yang direkomendasikan. Proses perlakuan awal fermentasi dilakukan selama 2, 3, 4, dan 5 hari dan proses ekstraksi dilakukan sebanyak 3, 6, 9, 12, 15, dan 18 siklus. Hasil proses fermentasi terbaik diperoleh dari perlakuan fermentasi selama 5 hari selama 12 siklus sebesar 0,3376 g minyak gaharu/g gaharu dan pada kondisi tersebut asam lemak bebas yang dihasilkan sebesar 6 mg NaOH/g sampel. Hasil bilangan asam yang digunakan masih memenuhi SNI dari minyak gaharu. Hasil analisis studi kinetika ekstraksi didapatkan model yang paling sesuai untuk substrat minyak gaharu, yaitu power law dengan nilai koefisien determinasi (R2) sebesar 0,95.
PENGARUH TEMPERATUR DAN ARAH ALIRAN TERHADAP EFEKTIVITAS PENUKAR PANAS NTU (Ɛ -NTU) PADA ALAT PENUKAR PANAS TIPE PLATE AND FRAME Reni Yuniarti; Feerzet Achmad; Yuniar Luthfia Listyadevi; Lisa Angraini; Muhammad Alfarizi Tazkia; Suhartono Suhartono; Suharto Suharto
JURNAL INTEGRASI PROSES VOLUME 11 NOMOR 1 JUNI 2022
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jip.v11i1.13989

Abstract

Alat penukar panas merupakan salah satu alat yang digunakan sebagai perpindahan panas antara dua fluida yang memiliki temperatur yang berbeda. Alat penukar panas memiliki tipe dan desain struktur yang berbeda, salah satu alat yang digunakan yaitu Plate and Frame Heat Exchanger (PFHE). Tujuan penelitian PFHE ini adalah untuk mengetahui pengaruh kenaikan temperatur fluida panas masuk dengan perbedaan arah aliran fluida terhadap efektivitas penukar panas NTU (ɛ-NTU). Penelitian ini dilakukan pada temperatur fluida panas 39-52°C pada arah aliran searah dan arah aliran berlawanan arah. Fluida panas dan fluida dingin yang digunakan pada penelitian ini yaitu air karena proses perpindahan panas yang baik dan tidak berbahaya. Dari penelitian ini disimpulkan bahwa meningkatnya temperatur fluida panas masuk diperoleh kenaikan efektivitas penukar panas NTU (ɛ-NTU) pada arah aliran searah maupun pada arah aliran berlawanan arah. Nilai ɛ-NTU pada arah aliran berlawanan arah adalah 31,97-38,80% dan nilai ɛ- NTU pada arah aliran searah adalah 24,13-27,95%. Nilai ɛ-NTU pada arah aliran berlawanan arah lebih besar dari pada arah aliran searah. Ini menunjukan bahwa arah aliran berlawanan arah lebih efektif melakukan proses perpindahan panas dari pada arah aliran searah.
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

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.
Pembuatan Briket Tongkol Jagung sebagai Sumber Energi Alternatif oleh Kelompok Tani Desa Titiwangi Lampung Selatan Achmad, Feerzet; Setiawan, Darma; Hukama, Ikhwan; Lisnurani, Lisnurani; Yuniarti, Reni; Suhartono, Suhartono; Suharto, Suharto
Jurnal Ilmiah Pangabdhi Vol 9, No 2: Oktober 2023
Publisher : LPPM Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/pangabdhi.v9i2.19442

Abstract

Corn cob waste continues to increase every year. The corn cobs become waste, which is seen as having no significant economic value by the people of Titiwangi Village, so they are only used as animal feed. Efforts are being made to overcome this problem through the processing of corncob waste into briquettes. Briquettes are an alternative energy source produced from carbon-containing materials by heating them at high temperatures. The purpose of utilizing corncob waste is to reduce waste and help the economy of the people of Titiwangi Village. The implementation method used is training in making briquettes from corn cobs. The output achieved is corncob briquettes. The advantages of the resulting briquettes are that they save energy, are environmentally friendly, do not smell, do not cause new waste, and have a distinctive natural aroma.
Sosialisasi Peningkatan Produksi dan Pengembangan Diversifikasi Produk Turunan Gaharu Yuniarti, Reni
TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Vol 3 No 2 (2023): TEKNOKREATIF : Jurnal Pengabdian Kepada Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LP2M), Institut Teknologi Sumatera, Lampung, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/teknokreatif.v3i2.1134

Abstract

Gaharu merupakan salah satu jenis tanaman hutan yang memiliki mutu sangat baik dengan nilai ekonomis yang tinggi. Perkembangan budidaya pohon gaharu di Provinsi Lampung berkembang pesat seperti halnya yang telah dilakukan oleh Kelompok Tani Gaharu Lampung dalam melakukan pengembangan dan pengolahan gaharu. Namun, permasalahan yang sedang dihadapi adalah produksi minyak gaharu yang masih rendah serta kurangnya pengetahuan dan keterampilan SDM dalam menginovasi produk. Potensi gaharu yang tinggi membuat peneliti tertarik melakukan kerjasama dengan Kelompok Tani Gaharu untuk bergerak bersama melakukan pengembangan dan pengolahan gaharu dalam bentuk program kemitraan masyarakat. Kegiatan ini dilakukan dengan dua pendekatan, yaitu peningkatan produksi dan mutu produk turunan gaharu serta pengembangan diversifikati produk turunan gaharu. Kedua pendekatan ini dilaksanakan dalam bentuk sosialisasi peningkatan produksi dan pelatihan mengenai inovasi produk turunan gaharu akan menjadi bagian dari kegiatan pengambdian kepada masyarakat. Setelah dilakukannya kegiatan ini, terdapat peningkatan pemahaman dan ketertarikan warga terhadap produk inovasi gaharu dengan signifikan yaitu mencapai 100%.
Characteristics of PB 260 clone rubber coagulated with natural coagulants: type of Averrhoa Achmad, Feerzet; Deviany, Deviany; Yuniarti, Reni; Fikrah, Faizatul; Az-Zahra, Syifa; Qarimah, Akhlatul; Marlina, Titi; Tambunan, Yonathan Marasi; Rahmadini, Gustia; Damayanti, Damayanti; Suhartono, Suhartono; Suharto, Suharto
Konversi Vol 13, No 1 (2024): April 2024
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v13i1.18724

Abstract

The aim of this research was to determine the properties of the PB 260 clone rubber using the Averrhoa type coagulant. The natural coagulants used in this study were Averrhoa bilimbi and Averrhoa carambola. The latex used was 150 ml of PB 260 clone rubber with a concentration of 100% natural coagulant of 75 ml and 2% formic acid. The rubber properties that were tested were Po, PRI, DRC, ash content, dirt content, volatile matter content and Mooney viscosity. This research also uses a special treatment in the form of centrifugation speed. The higher the centrifugation speed, the higher the pH value of the natural coagulant and the lower the H+ ion value, which accelerates the coagulation time of the latex. In natural coagulant extract, the highest values of Po, PRI, DRC, ash content, dirt content and Mooney viscosity were obtained at 0 rpm for Averrhoa bilimbi extract with values of 40%, 94.17%, 32.83%, 0, 32%, 0.038% and 77 MU. Meanwhile, in the test for volatile matter content, the highest value was found in Averrhoa carambola at 5000 rpm with a value of 0.23%.
Pengaruh Konsentrasi Ekstrak Buah Belimbing Wuluh (Averrhoa bilimbi) sebagai Koagulan Alami terhadap Karakteristik Karet Klon PB 260 Achmad, Feerzet; Amelia, Devita; Pratiwi, Ayu; Wahyu Saputri, Laila; Deviany; Yuniarti, Reni; Suhartono; Suharto
Jurnal Teknik Kimia USU Vol. 11 No. 1 (2022): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v11i1.8418

Abstract

Averrhoa bilimbi is a plant rich in benefits, one of which as natural coagulant. The aim of this research is to increase the potential of Averrhoa bilimbi as an environmentally friendly natural coagulant for the coagulation of rubber clone PB 260. The concentrations of Averrhoa bilimbi used were 45%, 55%, 65%, 75% and 85%. The characteristics of the rubber tested were dry rubber content (DRC), initial plasticity (Po) and Plasticity Retention Index (PRI). Based on the results of this study, the optimum concentration of Averrhoa bilimbi is 85% for latex coagulation time of 11 minutes with 33% DRC, 41% Po and 97% PRI. The highest the concentration of Averrhoa bilimbi used, the faster the coagulation process occurred. 2% formic acid was used as a chemical coagulant for comparison. From the results of this study, it can be concluded that Averrhoa bilimbi can be used as a natural coagulant producing rubber characteristics equal in quality as the ones using formic acid as a chemical coagulant and meets Indonesian Rubber Standard SNI 06-1903-2000.
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.
Pengaruh Konsentrasi Ekstrak Buah Belimbing Wuluh (Averrhoa bilimbi) sebagai Koagulan Alami terhadap Karakteristik Karet Klon PB 260 Achmad, Feerzet; Amelia, Devita; Pratiwi, Ayu; Wahyu Saputri, Laila; Deviany; Yuniarti, Reni; Suhartono; Suharto
Jurnal Teknik Kimia USU Vol. 11 No. 1 (2022): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.308 KB) | DOI: 10.32734/jtk.v11i1.8418

Abstract

Averrhoa bilimbi is a plant rich in benefits, one of which as natural coagulant. The aim of this research is to increase the potential of Averrhoa bilimbi as an environmentally friendly natural coagulant for the coagulation of rubber clone PB 260. The concentrations of Averrhoa bilimbi used were 45%, 55%, 65%, 75% and 85%. The characteristics of the rubber tested were dry rubber content (DRC), initial plasticity (Po) and Plasticity Retention Index (PRI). Based on the results of this study, the optimum concentration of Averrhoa bilimbi is 85% for latex coagulation time of 11 minutes with 33% DRC, 41% Po and 97% PRI. The highest the concentration of Averrhoa bilimbi used, the faster the coagulation process occurred. 2% formic acid was used as a chemical coagulant for comparison. From the results of this study, it can be concluded that Averrhoa bilimbi can be used as a natural coagulant producing rubber characteristics equal in quality as the ones using formic acid as a chemical coagulant and meets Indonesian Rubber Standard SNI 06-1903-2000.
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