Article Per Year (5 Year)
p-Index From 2021 - 2026
1.879
P-Index
This Author published in this journals
All Journal Jurnal Dinamika Penelitian Industri Science and Technology Indonesia IJEMS (Indonesian Journal of Environmental Management and Sustainability) Agroindustrial Technology Journal CHEESA: Chemical Engineering Research Articles Jurnal Teknik Kimia JURNAL TEKNIK PATRA AKADEMIKA Jurnal Teknologi Lingkungan
Rizka Wulandari Putri
Jurusan Teknik Kimia Fakultas Teknik Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Public Health

Published : 17 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 17 Documents
Search

 1   2 
Pemanfaatan sekam padi untuk produksi biobriket dengan variasi binder tepung tapioka dan tepung biji durian Rizka Wulandari Putri; Rahmatullah .; Budi Santoso; Selpiana .; Mutiara Aiko Habsyari; Shafira T Aliyah; Alek Al Hadi; Alieftiyani P Gobel
Jurnal Teknik Kimia Vol 29 No 1 (2023): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jtk.v29i1.1240

Abstract

Keterbatasan pasokan bahan bakar untuk kebutuhan domestik seperti LPG saat ini mendorong banyak peneliti mencari sumber energi alternatif yang dapat digunakan sebagai bahan bakar, salah satunya adalah bahan bakar padat biobriket. Penelitian ini bertujuan untuk mengetahui pengaruh perekat (binder) dan rasio bahan baku pada pembuatan biobriket dari sekam padi. Limbah pertanian berupa sekam padi dikumpulkan dan dipreparasi untuk penghilangan pengotor dan air sebelum dilakukan karbonisasi. Proses karbonisasi dilakukan pada suhu 300 ºC selama 30 menit. Penelitian ini menggunakan variasi perekat (binder) tepung tapioka dan tepung biji durian, dengan rasio bahan baku: binder yaitu 1 : 3; 1 : 1; dan 3 : 1. Biobriket yang dihasilkan diujji sifat fisika dan kimianya dengan analisa proksimat kemudian dilanjutkan dengan perendaman briket didalam minyak jelantah selama 10 menit . Hasil briket dianalisa dengan uji proksimat dan mendapatkan hasil kadar air (4,63% - 11,86%), kadar abu (21,05% - 41,03%), kadar zat mudah menguap (39, 08% - 53,88%), kadar karbon terikat (9,46% - 19,90%), untuk nilai kalor biobriket tanpa perendaman (2633 – 3502 kal/g) dan meningkat signifikan menjadi (3500 – 5671 kal/g) setelah perendaman minyak jelantah. Dari hasil tersebut, beberapa parameter telah memenuhi standar briket Jepang, Eropa dan Indonesia
Evaluation of Heat Loss Effect on Package Boiler Performance (5007-U) in the Utility Unit of Urea Fertilizer Industry Putri, Rizka Wulandari; Merdeka, M. Fabian; Alisya, Rona; Rahmatullah, Rahmatullah; Haviz, Muhammad
CHEESA: Chemical Engineering Research Articles Vol. 7 No. 2 (2024): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v7i2.19292.67-74

Abstract

Package boiler (PB) is a utility unit essential for producing steam by heating Boiler Feed Water (BFW) through the combustion of natural gas with air. Therefore, this study aimed to investigate the effect of heat loss on PB efficiency. To achieve this, direct and indirect methods were adopted, with data collected between 4 July and 29 August 2023. The results showed that PB efficiency in the fertilizer industry during this period ranged from 76.06% to 80.71%. On August 29, 2023, under optimal conditions, an efficiency of 80.71% was achieved, while a significant drop to 65.44% occurred during the 6th week on August 8, 2023, due to low oxygen (O2) levels. Flue gas analysis on August 29, 2023, obtained 3.64% excess O2, 11.17% carbon dioxide (CO2), and 0.04% carbon monoxide (CO). PB performance was influenced by heat loss from the dry flue gas, hydrogen (H2) content on flue gas, moisture in air and fuel, incomplete combustion, as well as radiation and convection phenomena.
The Effect of H-Factor on Kappa Number and Viscosity in Continuous Digester Putri, Rizka Wulandari; Rahmatullah, Rahmatullah; Siagian, Faisal
CHEESA: Chemical Engineering Research Articles Vol. 6 No. 1 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i1.15681.26-33

Abstract

One of the most important steps in pulping is the cooking process, which serves to separate the cellulose and hemicellulose from lignin and other by-products. During the cooking process in the digester, various factors must be considered to create high-quality pulp. Among these factors, the H-Factor plays a significant role due to its impact on the kappa number and viscosity in the pulping process. A high H-Factor can also damage the strength of the pulp. Therefore, this research aims to investigate the effect of the H-Factor and active alkali on pulp yield and quality. The active alkali used was in line with the desired production objectives, as insufficient levels of active alkali can lead to a low yield of pulp. Meanwhile, pulp quality standards in the Pulp and Paper Industry included kappa number of 12-18 in the digester process, an approximate viscosity of 23 mPa.s, and the selection of H-Factor based on the desired production target.
Catalyst Lifetime Analysis for High-Temperature Shift Converter (104-D1) at Urea Factory Rahmatullah, Rahmatullah; Putri, Rizka Wulandari; Mahendra, Bobi; Arofi, Hegar Tifal; Hadi, Cecep Sumiratna
CHEESA: Chemical Engineering Research Articles Vol. 6 No. 2 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i2.15986.76-84

Abstract

High Temperature Shift (HTS) Converter (104-D1) have a function to convert CO gas into CO2 in the ammonia unit. The presence of CO could be poisoning the catalyst in the ammonia converter. The performance of HTS (104-D1) was ideal if the percentage of CO outlet is above 3.41 mol % dry basis. The performance of HTS (104-D) was influenced by operating conditions (pressure and temperature) and the ratio of steam to carbon. The increase in temperature in HTS (104-D1) can increase in the reaction rate and a decrease in CO conversion due to a decrease in catalyst performance. The research aims to find out how the performance of HTS (104-D1) after Turn Around process (catalyst replacement) that reviewed based on the operating conditions and the resulting CO conversion. The analysis was carried out by comparing the CO conversion from the actual data with the CO conversion from the design data by using the regression equation method to predict the lifetime of the catalyst. CO conversion obtained from the design data is 69.42 %. Conversion of actual data in June, July, August, September and October was 67.43 %; 78.32 %; 77.93 %; 77.75 %; and 77.40 %. The lifetime of the HTS catalyst (104-D1) PUSRI-IIB was estimated to be used up to 5 years after Turn Around process.
Manufacturing Biodegradable Bioplastics from A Mixture of Starch and Kapok Fibers with Variations of Chitosan and Glycerol Rahmatullah Rahmatullah; Rizka Wulandari Putri; Enggal Nurisman; Yandriyani Yandriyani; Alek Al Hadi; Muhammad Anwar Raihan
Agroindustrial Technology Journal Vol. 8 No. 1 (2024): Agroindustrial Technology Journal
Publisher : Universitas Darussalam Gontor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21111/atj.v8i1.11086

Abstract

Biodegradable bioplastics are the latest solution to the problem of conventional plastics which hurt the environment. Types of biodegradable bioplastics, namely starch-based plastics and cellulose-based plastics, have been developed in many studies. Cellulose can be made into biodegradable bioplastics by adding starch, plasticizers, and strengthening materials with certain variations. This research aims to determine the effect of mixing glycerol plasticizer and the concentration of chitosan on the biodegradable bioplastics produced. The variables observed started from elongation, Young's modulus, density, tensile strength, biodegradability, and water resistance. The best biodegradable bioplastics results for density, tensile strength, and percent elongation values were obtained with variations of 60% glycerol and 3 gram chitosan of 5.62 g / mL, 163.5 KPa and 4.26 KPa; Young's modulus for variations of 20% glycerol and 3-gram chitosan is 45.17 KPa; the water absorption capacity of variations of 20% glycerol and 0.5-gram chitosan is 81.5%; and the bioplastic mass degraded at a variation of 40% glycerol and 3-gram chitosan at 49.21%.
Karakterisasi Perbandingan Bahan Baku Sekam Padi dan Campuran Sekam Padi-Ampas Tebu terhadap Kualitas Briket Putri, Rizka Wulandari; Rahmatullah; Susanti, Susi; Habsyari, Mutiara Aiko; Aliyah, Shafira Tasya; Wijayanti, Meta
Jurnal Teknologi Lingkungan Vol. 25 No. 2 (2024)
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jtl.2024.2018

Abstract

Fossil fuels cause several problems, such as energy scarcity and air pollution. Charcoal briquettes are sought by People around the world as an alternative to fossil fuels due to the high calorific value of briquettes. This phenomenon brings the briquettes prospect that is applied as solid fuel. This research aims to determine the effect of biomass feeds on the quality of briquettes. The research stages: carbonization at the temperature of 300 ºC for 1 hour with raw materials such as pure rice husk (RH) and a mixture of rice husk and sugarcane bagasse (RH:SB) with ratios of 1, 1.5 and 2. In the casting process, charcoal  RH and RH:SB were varied with durian seed flour adhesive (20% weight of feed). The results of the raw material values for pure RH and RH:SB mixture are (3,505; 3,043; 2,733 cal/gr) and (5,094; 4,161; 4,283 cal/gr),  which meet the regulation ESDM (4000-5000 kal/gr) for all RH: SB samples. The improvements in briquette quality are also found in the water content parameters of the briquettes, the water content of pure RH and RH: SB mixture is (10.44%, 10.15%, 6.6%) and (5.59%, 5.57%, 5.2%), where all RH:SB briquette samples comply with SNI (<8%). The content of ash, volatile matter and bound carbon still do not meet standards. It is recommended to vary the temperature to achieve the optimal temperature in order to obtain ash content, volatile matter and fixed carbon, which can meet the standards. ABSTRAK Bahan bakar fosil menimbulkan beberapa permasalahan seperti kelangkaan energi dan polusi udara. Briket arang mulai diminati oleh masyarakat di dunia sebagai alternatif pengganti bahan bakar fosil dikarenakan nilai kalor briket yang tinggi. Karena itu briket memiliki prospek untuk diaplikasikan sebagai bahan bakar padat. Tujuan dari penelitian ini adalah mengetahui pengaruh bahan baku biomassa terhadap kualitas briket. Tahapan penelitian mencakup perlakuan karbonisasi pada suhu 300 ºC selama 1 jam pada bahan baku pure sekam padi (SP) dan campuran sekam padi dan ampas tebu (SP:AT) dengan rasio 1; 1,5; dan 2. Pada proses pencetakan, masing-masing arang divariasikan terhadap perekat tepung biji durian (20% berat dari feed). Hasil nilai bahan baku SP dan campuran SP:AT adalah (3.505; 3.043; 2.733 kal/gr) dan (5.094; 4.161; 4.283 kal/gr) yang telah memenuhi Permen ESDM (4000-5000 kal/gr) pada sampel SP:AT. Perbaikan kualitas briket juga terdapat pada parameter kandungan air pada briket, kadar air pure SP adalah 10,44%; 10,15%; 6,6 %, sedangkan campuran SP:AT adalah 5,59%; 5,57%; 5,2%, di mana seluruh sampel briket SP:AT telah sesuai dengan SNI (<8%). Parameter kadar abu, zat terbang, dan karbon terikat masih belum memenuhi standar sehingga direkomendasikan untuk melakukan variasi temperatur agar mendapatkan temperatur optimal agar kadar abu, zat terbang, dan karbon terikat dapat memenuhi standar.
Exploration of Weak Acid Solvent Usage in the Separation of Aluminum (Al) from Multilayer Plastic Waste Selpiana, Selpiana; Haryani, Nina; Putri, Rizka Wulandari
Indonesian Journal of Environmental Management and Sustainability Vol. 9 No. 3 (2025): September
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2025.9.3.98-104

Abstract

Multilayer plastic waste is difficult to biodegrade, causing environmental problems. An alternative to processing multilayer plastic waste is to separate aluminum from the polymer using a delamination process with acid solvents. In this study, a combination of chemical (acid solvents), thermal (90oC), and mechanical (stirring at 300 rpm) methods was employed to evaluate the efficiency of delamination of multilayer plastic packaging. Several weak acid solvents, including acetic acid, citric acid, and formic acid, were tested at a concentration of 30% and a reaction time of 10 minutes. The method involved immersing cut multilayer plastic samples into acid solutions under controlled conditions, followed by filtration and drying to recover the aluminum layer. The best result was obtained using 30% formic acid, which successfully separated and recovered 0.940 g or 87% of aluminum from a 1.08 g multilayer sample. This process demonstrates an effective, relatively low-cost approach to enhance the recyclability of multilayer plastic waste, contributing to a more sustainable plastic waste management strategy.
Co-Authors Adhe Muhammad Rainadi Al Azhar Al Azhar Alek Al Hadi Alieftiyani P Gobel Alisya, Rona Aliyah, Shafira Tasya Arofi, Hegar Tifal Ayu Permatasari Budi Santoso Cundari, Lia Dedek Oktari Enggal Nurisman Enggal Nurisman Habsyari, Mutiara Aiko Hadi, Cecep Sumiratna Haryani, Nina M Daffa Umar Syauqi M. Galli Markasiwi M. Haviz Mahendra, Bobi Melati Ireng Sari Merdeka, M. Fabian Muhammad Anwar Raihan Muhammad Rendana Muhammad Yori Pratama Mutiara Aiko Habsyari Ningsih, RR. Yunita Bayu Nur Hidayatullah Omar Ibrahim R. M. Yusuf Agustria R. M. Yusuf Agustria Rahmatullah Rahmatullah Rahmatullah Rahmatullah Rahmatullah Rahmatullah Rahmatullah Rahmatullah Selpiana . Selpiana Selpiana Selpiana, Selpiana Selpiana, Selpiana Shafira T Aliyah Siagian, Faisal Sri Haryati Susi Susanti Susmanto, Prahady Tedi Andrianto Untung Waluyo Wijayanti, Meta Yandriyani Yandriyani