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All Journal Indonesian Journal of Chemistry Jurnal Inovasi Teknik Kimia Equilibrium Journal of Chemical Engineering International Journal of Engineering, Science and Information Technology SAINSMAT: Journal of Applied Sciences, Mathematics, and Its Education Aptekmas : Jurnal Pengabdian Kepada Masyarakat Journal of Renewable Energy, Electrical, and Computer Engineering Chemical Engineering Journal Storage (CEJS) Jurnal Teknologi Kimia Unimal CHEMTAG Journal of Chemical Engineering Jurnal Solusi Masyarakat (JSM) Sasambo: Jurnal Abdimas (Journal of Community Service) Proceedings of Malikussaleh International Conference on Multidisciplinary Studies (MICoMS)
Rizka Mulyawan
Chemical Engineering Department Engineering Faculty Malikussaleh University
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Methyl Orange Absorption Using Chitosan from Shrimp Skin as an Adsorbent Meriatna Meriatna; Sanda Mulia Utari; Rizka Mulyawan; Muhammad Muhammad; Zulmiardi Zulmiardi
International Journal of Engineering, Science and Information Technology Vol 3, No 2 (2023)
Publisher : Department of Information Technology, Universitas Malikussaleh, Aceh Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v3i2.431

Abstract

In the coloring process, the textile industry generally uses synthetic (artificial) dyes, methyl orange (MO). In this study, the adsorption of methyl orange (MO) dye with chitosan was investigated in a series of batch laboratory studies. The adsorption equilibrium study used a MO solution with a concentration of 10 to 50 mg/L with an adsorbent weight of 3 g put into an Erlenmeyer and shaken until the adsorption reached an equilibrium condition. Meanwhile, the adsorption kinetics used a MO solution with an initial concentration of 10 and 20 mg/L with a volume of 100 mL with an adsorbent weight of 3 g and the solution was adjusted to pH 2. Effective operating parameters such as pH, initial concentration of dye (C0) and contact time at adsorption has been investigated. The results showed that the adsorption capacity of methyl orange (MO) dye from chitosan increased with an increasing acid content, and it was found that a solution of pH 2 was the optimal pH value for MO adsorption. The adsorption parameters for the Langmuir and Freundlich isotherms were determined by nonlinear regression and the equilibrium data were best explained by the Langmuir isotherm model, this was indicated by the high value of the correlation coefficient (R2), which was 0.9595. The maximum adsorption capacity was 0.1297 mg/g. Adsorption kinetics can be successfully applied to pseudo second-order kinetic models. The pseudo second-order model results show that the adsorption process is controlled by chemical sorption (chemisorption).
Synthesis and Characterization of Chitosan-Pectin-Citric Acid-Based Hydrogels for Biomedical Applications (Primary Wound Dressings) Suryati Suryati; Rizka Mulyawan; Sulhatun Sulhatun; Muhammad Muhammad; Nikmat Wanda
International Journal of Engineering, Science and Information Technology Vol 3, No 2 (2023)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v3i2.447

Abstract

This study aims to analyze the processing of chitosan-pectin biocomposite hydrogel with the addition of citric acid to improve the quality of the biocomposite for primary wound dressing applications. The method is printing the biopolymer solution in a glass mold, then drying at 50oC. Chitosan 90.2% DD and pectin dissolved in 1% acetic acid with a ratio (w/w) of 50:50. The two ingredients were mixed using a magnetic stirrer at room temperature for 30 minutes until completely dissolved, then added citric acid crosslinking agent with various concentrations of 2,4, 6,8,10 (%). The test results for the characteristics of the chitosan-pectin-acid biocomposite Citrate obtained the best thickness in the composition variation (50:50:8) of 0.31 mm. The analysis results of the best absorption of the chitosan-pectin-citric acid biocomposite on the composition variation (50:50:6) were 185%. In the swelling analysis of the chitosan-pectin-citric acid biocomposite, the variation in composition (50:50:10) was 403%. The tensile strength test results of the chitosan-pectin-citric acid biocomposite decreased with the addition of citric acid, the best obtained was 20.76 MPa, and the best elongation was 76.0%. Test results for the functional group of the chitosan-pectin-CaCl2 biocomposite for the presence of O-H, C-H, N-H bonds in the fact of O-H, C-H, N-H bonds at a wavelength of 4000-2500 cm-1, C=O, C=N, C=C at a wavelength of 2000 -1500, and the specific absorption of the chitosan-pectin-citric acid biocomposite 400-1400 cm-1 indicates that the resulting membrane tends to be polar, hydrophilic and environmentally friendly because it can be degraded. Based on the expected test results, it was shown that the chitosan-pectin-CaCl2 biocomposite has the potential to be applied as an ideal primary wound dressing for wound healing and protection.
Pengaruh Variasi Jenis dan Volume Perekat (Tepung Tapioka dan Air Tebu) Terhadap Kualitas Briket dari Pelepah Kelapa Sawit (Elaeis guenensis Jacq) Agam Muarif; Nurhabiah Nurhabiah; Muhammad Muhammad; Lukman Hakim; Zainuddin Ginting; Rizka Mulyawan
Jurnal Inovasi Teknik Kimia Vol 9, No 2 (2024)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v9i2.10777

Abstract

Briket didefinisikan sebagai energi alternatif pengganti bahan bakar fosil berwujud padat dan berasal dari limbah biomassa yang telah mengalami proses pemampatan dengan daya tekan tertentu. Salah satu limbah biomassa yang belum dimanfaatkan secara maksimal dan berpotensi dijadikan sebagai bahan bakar alternatif adalah limbah pelepah kelapa sawit. Penelitian ini bertujuan untuk menentukan pengaruh variasi jenis dan volume perekat terhadap kualitas briket dari limbah pelepah kelapa sawit berdasarkan analisis nilai kadar air, kadar abu, laju pembakaran, nilai kalor dan Scanning Electron Microscopy (SEM). Jenis perekat yang digunakan pada penelitian ini adalah tepung tapioka dan air tebu dengan variasi volume masing-masing sebesar 35, 40, 45, 50 dan 55 ml.  Hasil terbaik yang diperoleh pada penelitian ini adalah dengan penambahan volume perekat sebanyak 45 ml. Hasil karakterisasi briket dari limbah pelepah kelapa sawit menggunakan perekat tepung tapioka dan air tebu secara berurutan yaitu kadar air sebesar 7,342% dan 7,361%, kadar abu 7,477% dan 7,905%, laju pembakaran 0,1004 dan 0,1140 gram/menit serta nilai kalor sebesar 5107,95 cal/gr dan 5038,69 cal/gr. Hasil pengujian dengan menggunakan SEM dengan perbesaran 2000x dengan ukuran partikel 20µm menunjukkan  morfologi permukaan briket dengan susunan rongga yang teratur. Hasil penelitian ini menunjukkan bahwa briket yang dihasilkan sudah memenuhi SNI No.1/6235/2000 briket arang.
Penyuluhan Pemanfaatan Minyak Jelantah dan Ampas Kopi Menjadi Sabun Cuci Piring di Kabupaten Bener Meriah Rizka Mulyawan; Agam Muarif; Khairul Anshar; Ahmad Fikri; Nurwardina Sofiyani; Nur Aisyah; Maulana Heru Mulya; Melianda Putri Wulandari
Sasambo: Jurnal Abdimas (Journal of Community Service) Vol. 6 No. 1 (2024): February
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat (LITPAM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/sasambo.v6i1.1586

Abstract

Ampas kopi dari kedai kopi selama ini pada umumnya tidak dimanfaatkan secara maksimal. Selain itu, minyak jelantah juga pada umumya dibuang ketika tidak dimanfaatkan dan dapat mencemari lingkungan. Minyak jelantah yang diolah dapat digunakan sebagai bahan baku pembuatan sabun. Dari fakta tersebut, limbah minyak jelantah berpotensi untuk dimanfaatkan sebagai sabun cuci piring. Ampas kopi juga dapat digunakan sebagai karbon aktif yang dapat digunakan untuk menyerap kotoran. Pada umumnya, minyak jelantah dari rumah tangga di Desa Kenine Kabupaten Bener Meriah, dimana angka pervalensi stunting cukup tinggi, dibuang atau digunakan kembali yang berdampak negatif bagi kesehatan tanpa dijadikan produk yang lebih berguna seperti sabun cuci piring. Berdasarkan permasalahan tersebut, kegiatan pengabdian kepada kepada masyarakat di Desa Kenine Kabupaten Bener Meriah melalui kegiatan penyuluhan kepada masyarakat khususnya ibu-ibu yang berjumlah dua puluh delapan orang di desa tersebut untuk memanfaatkan limbah ampas kopi dan minyak jelantah sebagai bahan utama pembuatan sabun cuci piring sebagai solusi alternatif dari sabun cuci piring komersil yang lebih ekonomis. Hasil dari kegiatan penyuluhan ini adalah berubahnya cara pandang dan sikap dari peserta untuk menggunakan limbah minyak jelantah dan amps kopi yang dapat merusak lingkungan menjadi bahan yang lebih berguna yaitu sabun cuci piring serta keterampilan dan pemahaman terkait cara pembuatannya. Used Cooking Oil and Coffee Grinds Utilization for Dish Soap Production Counselling in Bener Meriah District Coffee grinds from coffee cafes should currently be used properly. Additionally, cooking oil can contaminate the environment because it is typically thrown away after use. Soap can be made using processed frying oil as a raw ingredient. These data suggest that leftover cooking oil may have a purpose as dishwashing soap. Additionally, coffee grinds can be utilized as activated carbon to draw dirt to the surface. Used cooking oil from homes in Kenine Village, Bener Meriah Regency, where stunting prevalence is rather high, is typically thrown out or reused without being converted into a more beneficial product like dishwashing soap, which is harmful to health. Based on these challenges, the Bener Meriah Regency's community service projects in Kenine Village involve reaching out to the locals to use leftover coffee grounds and cooking oil as the primary ingredients for dishwashing soap, which is a more affordable alternative to commercial dishwashing soap. As a result of this outreach program, participants' attitudes and perspectives regarding recycling waste that could harm the environment into more valuable commodities have changed.  
Preparation of Bioethanol from Pineapple Peel (ananas comosus L. Mer) Waste with the Addition of Hydrochloric Acid and Citric Acid Catalysts Nur Khairani; Rizka Mulyawan; Meriatna; Agam Muarif; Syamsul Bahri; Iqbal Kamar
Proceedings of Malikussaleh International Conference on Multidisciplinary Studies (MICoMS) Vol. 4 (2024): Proceedings of Malikussaleh International Conference on Multidisciplinary Studies (MI
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/micoms.v4i.948

Abstract

Bioethanol is ethanol derived from biological sources. Bioethanol can be produced from plants that contain many starch and cellulose compounds using the help of yeast activity. One of them is pineapple peel which can add a variety of basic materials for bioethanol production which is economical and easy to obtain. This study aims to analyze the effect of acid hydrolysis on glucose content, analyze the effect of fermentation time and the effect of yeast weight on bioethanol characteristics. This research has been done before and only focused on one catalyst. What has never been done is comparing the two catalysts. The research was conducted using hydrolysis fermentation and distillation using hydrochloric acid and citric acid catalysts with yeast weight variation of 12, 15, and 17 grams, fermentation time variation of 2, 3, 4, and 5 days. In this research, glucose test, density analysis, yield analysis, and GC-MS were conducted. The results of this study showed that the best results in the treatment of hydrochloric acid catalyst at a yeast weight of 15 grams, and obtained glucose levels of 6.90% for hydrochloric acid and 5.10% for citric acid, density test obtained the highest results at a yeast weight of 15 grams 4 days 0.8288 gr / ml for hydrochloric acid catalyst and the lowest density obtained at a yeast weight of 17 grams 5 days 0, 8168 gr/ml, yield analysis obtained at the amount of 15 grams of yeast with a fermentation time of 14 days of 4.3536% in the treatment of hydrochloric acid catalyst and 3.8557% in the treatment of citric acid catalyst fermentation time of 3 days, GC-MS test showed that ethanol contained in the test sample.
OPTIMASI ENERGI PADA PRODUKSI ETILEN GLIKOL DENGAN PROSES STERILISASI: STUDI SIMULASI MENGGUNAKAN ASPEN HYSYS DENGAN METODE RESPONSE SURFACE METHODOLOGY (RSM) Yus Mita; Nasrul ZA; Rizka Mulyawan; Leni Maulinda; Azhari Azhari; Ferri Safriwardy
Chemical Engineering Journal Storage (CEJS) Vol. 6 No. 03 (2026): Chemical Engineering Journal Storage (CEJS)-Juni 2026
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v6i03.20353

Abstract

Penelitian ini bertujuan untuk mengoptimalkan produksi etilen glikol dari limbah etilen oksida hasil proses sterilisasi menggunakan simulasi Aspen Hysys dan metode Response Surface Methodology (RSM). Etilen glikol merupakan produk kimia penting yang banyak digunakan di berbagai industri, seperti otomotif, tekstil, dan plastik. Namun, proses produksi tradisional sering kali memiliki tantangan terkait konsumsi energi yang tinggi dan pembentukan produk sampingan yang tidak diinginkan. Dalam penelitian ini, limbah etilen oksida dari proses sterilisasi diolah kembali untuk menghasilkan etilen glikol dengan pendekatan yang lebih efisien secara energi. Simulasi dilakukan menggunakan perangkat lunak Aspen Hysys untuk memodelkan berbagai skenario operasional, termasuk variasi suhu, tekanan, dan fraksi uap. Optimasi dilakukan menggunakan metode Response Surface Methodology (RSM) dengan desain eksperimen Central Composite Design (CCD) untuk mengevaluasi interaksi antar variabel. Berdasarkan hasil prediksi RSM, kondisi optimal tercapai pada suhu 196°C, tekanan 14 atm, dan fraksi uap 0,6, yang menghasilkan kemurnian produk sebesar 99,85%, penghematan energi mencapai 55,869%, dan kapasitas produksi sebesar 15.176,596 kg/jam. Hasil simulasi aktual menunjukkan sedikit perbedaan dengan hasil prediksi, di mana penghematan energi tercatat sebesar 62,09%, kapasitas produksi 14.318,3067 kg/jam, dan kemurnian produk tetap berada pada angka 99,85%. Analisis varians (ANOVA) menunjukkan bahwa suhu dan fraksi uap memiliki pengaruh yang signifikan terhadap efisiensi energi dan kapasitas produksi. Hasil penelitian ini membuktikan bahwa pendekatan kombinasi simulasi Aspen Hysys dan optimasi RSM efektif dalam meningkatkan efisiensi energi dan memaksimalkan hasil produksi etilen glikol.
Pelatihan Komunikasi Efektif Kader Posyandu dan Opinion Leader dalam Upaya Penanganan Stunting di Gampong Paloh Punti Kota Lhokseumawe Cut Andyna; Muhammad Fazil; Muchlis; Rizka Mulyawan
Jurnal Solusi Masyarakat (JSM) Vol. 4 No. 1 (2026)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jsm.v4i1.25537

Abstract

Posyandu cadres are at the forefront of handling stunting due to their direct involvement in the community. In addition to driving participation in environmental prevention and empowerment efforts, Posyandu Cadres also provide assistance, education and early detection in stunting cases. This then positions the Cadre to have a strategic role in monitoring maternal and child health. For this great responsibility, Posyandu Cadres need to have skills in communication. This will be the foundation for cadres to conduct health education, build trust and correct misinformation. With good communication, cadres can have a greater impact on maternal and child health, including reducing the number of stunting cases. Therefore, this communication training activity was carried out to answer the anxiety of Posyandu Cadres who felt unconfident in carrying out their duties and roles. This activity was initiated by PT PHE NSO as a form of social responsibility, especially in its operational area by collaborating with the Oil and Gas Center. This program is part of the assistance to the Paloh Punti Village Posyandu which has previously supported the Supplementary Feeding (PMT) to the vulnerable target groups, namely pregnant women who experience Chronic Energy Deficiency (KEK) and toddlers who are malnourished or do not gain weight. This training will not only equip cadres technically but also conceptually in designing educational strategies that are communicative and empathetic to the needs of the community so as to encourage the achievement of active family involvement in dealing with stunting.
The Effects of Fermentation Extent and Acid Concentration on Bioethanol from HVS Paper Waste Rizka Mulyawan; Rizka Nurlaila; Tsa Tsa Anindya Rakhim Ahmadi; Muhammad Muhammad; Novi Sylvia; Agam Muarif
Equilibrium Journal of Chemical Engineering Vol 7, No 1 (2023): Volume 7, No 1 July 2023
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i1.72732

Abstract

Abstract. Bioethanol is an alternative energy sourced from environmentally friendly raw materials from wastes that contain a lot of lignocellulosic such as HVS paper. Paper contains about 85% cellulose, 8% hemicellulose, 5% lignin and the rest is in the form of ash compounds. Bioethanol is ethanol produced from the fermentation of glucose (sugar) followed by a distillation process. This study aims to analyze the effect of a combination of fermentation time and concentration of sulfuric acid on bioethanol. The highest yield of beathanol was obtained at a hydrolysis concentration of 6.5% with a 7-day fermentation time of 3.45%. Bioethanol density that was close to standard was 3.5% acid concentration with 3 and 5 days fermentation. Moreover, at 3.5% acid concentration showed the closest bioethanol viscosity to the standard value with all conditions synthesized acidic bioethanol with pH ranged from 6 to 6.5Keywords:Bioethanol, Fermentation, HVS paper, Sulfuric acid
Thermal and Physical Properties of Patchouli Essential Oil Industry Residue as Renewable Feedstock for Bioenergy Zainuddin Ginting; Adi Setiawan; Rizka Mulyawan; Wika Armadani; Yuda Hermawan; Ashish Shrestha
Journal of Renewable Energy, Electrical, and Computer Engineering Vol. 2 No. 1 (2022): March 2022
Publisher : Institute for Research and Community Service (LPPM), Universitas Malikussaleh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jreece.v2i1.6644

Abstract

Patchouli plant is one of main agricultural commodities in Indonesia with an area of 64.67 ha. The solid waste produced from the distillation industry is around 98% of total feedstock. The aim of this research is to disclose the characteristics of solid waste biomass from patchouli essential oil industry harvested from Lhokseumawe, Indonesia. The properties of patchouli biomass before and after distillation was analyzed by using a number of techniques including proximate, bomb calorimeter, TGA-DTG, DSC and lignocellulosic analyses. Five kilograms of biomass was collected after patchouli harvesting then sorted into four categories i.e. leaves, branches and trunk. and mixture of all. Another set of biomass residue was collected after distillation process and grouped similar to those collected before distillation. All samples were then dried, ground and sieved to 50 mesh size. The analysis results showed that the highest heating value was observed from the sample of patchouli leaves collected before distillation process with a value of 15.65 MJ/kg where its volatile matter content was 81.26%. Compositional analysis of lignocellulosic suggested that 27% in pre-distilled branches. Mixture of all parts was found to contain 35% cellulose that was the highest. Lignin content with 42% value was found in after distilled trunk.
Utilization of Molasses Waste as Activated Carbon for Adsorption of Rhodamine B from Synthetic Waste Ali Nur Muhammad Zaidin Balatif; Muhammad Muhammad; Rizka Mulyawan
Journal of Renewable Energy, Electrical, and Computer Engineering Vol. 4 No. 1 (2024): March 2024
Publisher : Institute for Research and Community Service (LPPM), Universitas Malikussaleh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jreece.v4i1.14673

Abstract

The utilization of molasses waste as Rhodamine B adsorbent has been investigated by studying adsorption isotherm and adsorption kinetics. The sample used is a variation of the concentration of Rhodamine B 10, 25, and 50 mg/L for kinetics adsorption and 50 mg/L, 100 mg/L, 150 mg/L, 200 mg/L, and 250 mg/L for isotherm adsorption. Kinetic analysis adsorption being tested by pseudo-first-order and pseudo-second-order rate equation, as for the equilibrium equation being tested by Langmuir and Freundlich adsorption isotherms. Study shows that Langmuir equation model and pseudo-second-order are the most suitable to be applied. The adsorption constant is obtained of 1.1664 L/g and qmax of 221.8279 mg/g in Langmuir Equation. Whereas for pseudo second order equations obtained values of qe, exp and qe, cal which are slightly different. The qe, cal values obtained were 8.142 mg/g, 23.141 mg/g, and 53.895 mg/g for various concentrations.  K value is obtained with a range of 0.001754-0.000294 and a value of R2 with a range of 0.8249-0.995 for various concentration. Intraparticle diffusion in this study is not the only rate control measure due to the plot linear at each concentration does not cross the origin.
Co-Authors Abrar Muslim Adi Setiawan Agam Muarif Ahmad Fikri Ali Nur Muhammad Zaidin Balatif Andyna, Cut Angga Tri Agusna PA Anugrah Yunika Tambunan Ashish Shrestha Azhari Azhari Bakhtiar Bakhtiar Cut Khairunnisa Cut Rika Saffira Eddy Kurniawan Farid Yoanda Ferri Safriwardy Fikri Hasfita Fitriani Fitriani Husni Husin Iqbal Kamar Khairul Anshar Leni Maulinda Lukman Hakim Marisa Fitria Maulana Heru Mulya Melianda Putri Wulandari Meriatna Meriatna Muchlis Muhammad Fazil, Muhammad Muhammad Muhammad Mutia Reza Nasrul ZA Nia Afriani Nikmat Wanda Novi Sylvia Nur Aisyah Nur Khairani Nurhabiah Nurhabiah Nurwardina Sofiyani Purwoko, Agus Rizka Nurlaila Rozanna Dewi S, Syarifuddin Sanda Mulia Utari Subhan A Gani Sulhatun Sulhatun Suryati Suryati Syamsul Bahri Wika Armadani Wika Armadani Yuda Hermawan Yunardi, Y Yus Mita Zainuddin Ginting Zulmiardi, Zulmiardi