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All Journal Reaktor Jurnal Sains dan Teknologi Jurnal Teknik Kimia USU Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Journal of Engineering and Technological Sciences JURNAL INTEGRASI PROSES Konversi KURVATEK Jurnal UNITEK Narra J Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Jurnal Teknik Kimia USU Bhakti Nagori (Jurnal Pengabdian kepada Masyarakat) Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi Jurnal Offshore: Oil, Production Facilities, and Renewable Energy LAVOISIER: Chemistry Education Journal Heca Journal of Applied Sciences Malacca Pharmaceutics Leuser Journal of Environmental Studies Infolitika Journal of Data Science LAVOISIER: Chemistry Education Journal JURNAL REKAYASA KIMIA & LINGKUNGAN

Zuchra Helwani

Universitas Riau

Author-ID : 520759

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Veterinary Other

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Optimasi Pembuatan Tricalcium Phospate (TCP) Berpori Dengan Metode Protein Foaming-Starch Consolidation Menggunakan Analisa Response Surface Methodology (RSM) Adi Maulana Putra; Ahmad Fadli; Zuchra Helwani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Porous Tricalcium phosphate is a material that can be used as bone substitute. Protein foaming-starch consolidation method is a technique to produce Porous Tricalcium Phosphate (TCP) using yolk as an agent to form pore. This research aims to know the influence of slurry composition and temperature rising rate of sintering on physical, chemical and mechanical properties of porous TCP and to conduct characterization porous TCP in accordance with standard as synthetic bone graft. This research was begun with mixing the TCP powder, starch, Darvan 821A and yolk. Slurry was stirred mechanically in speed of 150 rpm for 3 hours. Slurry was poured in mold and heated in oven with the temperature of 180°C for an hour. Then sample was released from mold and burnt at 600°C ended by sintering at 1100°C for an hour. The result was porous TCP with porousity of 73,7-79,30%, density of 0,65-0,83 g/cm3 and compressive strength of 1,88-2,4 Mpa. Significance level between variables can be seen from pvalue < 0,05 and lack of fit > 0,05 which show that model was corresponding toward the result. R2 obtained were Y1 = 89,68%, Y2 = 89,69%, Y3 = 89,06%. The most affecting factor significantly towards all the responses was dispersant addition that followed by starch addition and temperature rising rate of sintering. In optimum condition (dispersant addition of 8,09 gr with starch addition of 9 gr and temperature rising rate of sintering of 1°C/minute) was obtained the optimum value of response for porosity by 75,7378%, density by 0,76gr/cm3 and compressive strength 2,16 Mpa.Keywords : tricalcium phophate, yolk, porosity, density, compressive strength

Sintesis Kulit Telur Ayam/Serbuk Besi Menjadi Katalis Cao/Serbuk Besi Untuk Reaksi Transesterifikasi Minyak Sawit Off Grade Menjadi Biodiesel Gusti Ayu Nurjanah; Zuchra Helwani; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Heterogeneous solid base catalyst by modificated Eggshells through calcination, hydration, dehydration methods with iron powder through impregnation method to load calcium oxide with eggshells as precursor. The catalyst with the highest activity is obtained when the calcination temperature of 900°C and the calcination time of 2 hours under transesterification reaction conditions of a molar ratio of methanol/oil 10:1, catalyst dosage of 1% by weight, temperature of 70 °C for 2 hours with yield biodiesel results reached 91,72%.Keyword: biodiesel, calcination, calcium oxide, catalysts, iron powder.

Pembuatan Briket Dari Produk Torefaksi Pelepah Sawit Ramdhani Asywal; Zuchra Helwani; Warman Fatra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Palm frond is biomass that has not been widely used as a renewable energy source. Torrefaction is a pretreatment process to improve the quality of the biomass as solid fuel. The aims of this research was to made briquette from palm frond which appropriate with SNI, and then to determined the effects of particle size, pressure and filler composition on response toward calorific value and pressure using Responce Surface Methodology (RSM). Palm frond uses sieve 60, 80 and 100 mesh. Pressure 100, 110 and 120 kg/cm2, and tapioca adhesive composition 10, 20 and 30%-wt. The highest calorific value was 3989,05 cal/g which obtained at 100 mesh of particle size, pressure 120 kg/cm2, and filler compostion 10%-wt. The highest pressure was 8,92759 kg/cm2 which obtained at 100 mesh of particle size, pressure 120 kg/cm2 and filler composition 30%-wt. Process conditions is very influence significantly on the calorific value and compressive strength is the composition of the adhesive and the pressing pressure. Keywords : Briquette, Torrefaction, Responce Surface Methodology, Calorific Value, Renewable Energy

Esterifikasi Gliserol Sebagai Produk Samping Biodiesel Menjadi Triacetin Dengan Menggunakan Katalis Zeolit Alam Pada Variasi Suhu Reaksi Dan Konsentrasi Katalis Dedi Meier Silaban; Zuchra Helwani; Silvia Reni Yenti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Glycerol is by-product of biodiesel. Production of biodiesel will produce glycerol about 10% of total biodiesel. The excess glycerol able to treatment to a more expensive product, such as triacetin. Triacetin is a triester from glycerol and acetic acid. It is used as good additive and also soluble in biodiesel. Triacetin was produced by esterification of glycerol and acetic acid. The aim of this research was to know the influence of the concentration of catalyst and esterification temperature reaction toward glycerol conversion. Esterification of glycerol was done by activated natural zeolite catalyst. The molar ratio of glycerol and acetic acid was 1:7. The temperature that used was 90oC, 100oC, and 110oC, than the concentration of zeolite catalyst was 2%, 4%, and 6% of acetic acid mass. The highest glycerol conversion was 85,21% that reached in reaction temperature 110oC and catalyst concentration 4% of acetic acid mass. The temperature and catalyst concentration of esterification was directly proportional of the glycerol conversion.Key words: Biodiesel, esterification, glycerol, triacetin, zeolite.

Torefaksi Pelepah Sawit : Pengaruh Kondisi Proses Terhadap Nilai Kalor Produk Torefaksi Wenny Susanty; Zuchra Helwani; Zulfansyah Zulfansyah
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Palm frond is biomass that has not been widely used as a renewable energy source. Torrefaction is a pretreatment process to improve the quality of the biomass as solid fuel. The aim of this research was to determine the condition of the process to the increase in calorific value torrefaction product. Results of the research is the calorific value and the proximate analysis torrefaction products such as moisture content, ash content, volatile content, and the content of fixed carbon. Torrefaction product calorific value in the range 17.700-19.800 kJ/kg.Key words: biomass, oil palm frond, renewable energy, solid fuel, torrefaction,

Upgrading Karakteristik Biopelet Tandan Kosong Sawit Dengan Penambahan Oil Sludge Sebagai Co-Firing Tengku Mukhlis; Idral Amri; Zuchra Helwani
Journal of Bioprocess, Chemical and Environmental Engineering Science Vol 2 No 1 (2021): Journal of Bioprocess, Chemical, and Environmental Engineering
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, UNRI

Biopelet is one of the alternative fuels converted from biomass. Biomass which has great potential to be converted into biopelet is Empty Fruit Bunches (EFB). Such considerations make researchers interested in conducting a study on the use of EFB as an alternative fuel in the form of biopelets. In this research, we used torefaction and densification processes and the addition of oil sludge as a co-firing to increase the mass and energy density which had been a problem with the nature of EFB. The research procedure started from the raw material preparation stage, the EFB and oil sludge torefaction process and the bioepelet manufacturing stage. For fixed variables, the raw material size (EFB) is ± 15 mm , the raw material ratio is 70:30 (EFB: Oil Sludge), the torefaction temperature is 275 °C, the size of the biopelet diameter is 20 mm (ISO 17225). For 20 mesh particles, the N2 flow rate was 50 ml / minute, for the changing variables were the torefaction detention time of 30, 45 and 60 minutes, the pressing pressure was 30, 40 and 50 bar.The results showed that there was an effect of torefaction detention time which was directly proportional to the increase in proximate characteristics and calorific value of biopelets with the best results of 3.35% moisture content, 8.66% ash content, 9.50% volatile content, 78.49 %, fixed carbon content, and the calorific value of 4597.76 cal / g under the conditions of 60 minutes of torefaction detention time. There is an effect of pressing pressure which is directly proportional to the increase in the mechanical properties of the biopelet with the best results of density 1.148 gr / cm3, compressive strength 16.86 bar, and porosity of biopelet 13.33% under pressure conditions of 50 bar. The effect of adding oil Sludge as co-firing resulted in the calorific value of the biopelet being lower than the calorific value of EFB. This is because the calorific value of oil sludge is lower than the calorific value of EFB.

Pengaruh Variasi Dosis Adsorben terhadap Penyisihan COD Buangan Akhir Palm Oil Mill Effluent (Pome) menggunakan Magnetic Biochar Kesni Savitri; David Andrio; Zuchra Helwani; Topan Herianto
Jurnal Offshore: Oil, Production Facilities and Renewable Energy Vol 6, No 1 (2022): Jurnal Offshore: Oil, Production Facilities and Renewable Energy
Publisher : Proklamasi 45 University

Penelitian ini bertujuan untuk mengetahui pengaruh variasi dosis adsorben terhadap penyisihan COD buangan akhir POME menggunakan magnetic biochar. Magnetic biochar merupakan modifikasi biochar dengan penempelan ion logam. Magnetic biocharberbahan baku limbah pelepah sawit dibuat dengan cara impregnasi pelepah sawit dengan FeCl3.6H2O. Proses selanjutnya adalah proses pirolisis menggunakan reaktor fixed bed horizontal dengan temperatur 550oC dan dialiri dengan gas N2 selama 20 menit. Uji adsorpsi dilakukan dengan sistem batch dengan variasi dosis adsorben 1,25; 3,15; 5; 6,8; 8,55 g/L. Hasil supernatan diambil dan dianalsis dengan paramater uji COD total. Berdasarkan hasil penelitian, didapatkan bahwa semakin besar dosis magnetic biochar yang diberikan maka semakin besar % penyisihan COD buangan akhir POME. Penyisihan sebesar 72.72%. diperoleh dari penggunaan 8,55 g/L magnetic biochar dan terendah diperoleh sebesar 50,3 % dengan penggunaan 1,25 g/L. Sementara hasil penyisihan COD buangan akhir POME menggunakan biochar tanpa modifikasi hanya sebesar 31.77%. Sehingga penggunaan biochar yang dimodifikasi dinilai lebih baik dalam penghilangan COD buangan akhir POME.

Manufacturing of Crystal Palm Sugar and Digital Product Marketing in Lubuk Bendahara Timur Village Said Zul Amraini; Zuchra Helwani; Muhammad Mardhiansyah; Warman Fatra; Reno Susanto
ABDIKAN: Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi Vol. 1 No. 3 (2022): Agustus 2022
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/abdikan.v1i3.810

Palm sugar agro-industry in Rokan Hulu Regency has obstacles in its development, namely technological capabilities, and limited supporting infrastructure for agro-industry, marketing and distribution that are less developed. The purpose of this service is to design a tool to make crystal sugar so that it can convert solid palm sugar which is usually produced by the community so that the price of palm sugar is higher than ordinary solid palm sugar and assist in digital marketing. This community service method is carried out in several stages, namely: observation, problem identification, problem formulation and finding the best solution. Through this service program, this service, the University of Riau implementation team has succeeded in designing and manufacturing palm sugar crystallization tools, socializing the use of the tool, counseling about digital marketing, and counseling efforts to change people's mindsets in the behavior of using sap water as an ingredient for making palm sugar.

Study Experimental of Diesel Engines Performance by Using Variations of Mesh Filter and Biodiesel B40, B50 as Fuel Romy Romy; Zuchra Helwani; Asal Felix Mandrofa
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 66 No 3 (2022): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v66i3.291

Biodiesel is an alternative fuel, which can be used as a substitute for fossil fuels. Biodiesel has different characteristics than fossil fuels, so need study to improve engine performance. One way to improve engine performance by vary the fuel filter mesh. In this study by varied the size of the filter mesh with sizes of 2, 10, and 30 microns. This study used B40 (a ratio 60% diesel and 40% biodiesel) and B50 (a ratio 50% diesel and 50% biodiesel) as fuel. Then, an engine rpm was varied by brake pressure load of 2500 kg/m2, 5000 kg/m2, 7500 kg/m2, 10000 kg/m2, and 12500 kg/m2. As results, the optimal mesh size used for B40 was 2 microns and 30 microns for B50 fuel. From the comparison of engine performance results, the fuel filter mesh used in B40 fuel has better engine performance results compared to B50.

STUDY OF KINETICS AND ADSORPTION ISOTHERM MODELLING OF POME FINAL DISCHARGE USING MAGNETIC BIOCHAR AS ADSORBENT Kesni savitri; David Andrio; Zuchra Helwani
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3210

Penelitian tentang pemodelan kinetika dan isoterm adsorpsi pelepasan akhir POME menggunakan biochar magnetik dari pelepah sawit untuk menghilangkan COD, TSS dan warna telah dilakukan. Sintesis, karakterisasi dan uji adsorpsi magnetik biochar telah berhasil dilakukan. Magnetic biochar dibuat dengan cara impregnasi pelepah sawit menggunakan FeCl3.6H2O selama 3 jam dan pirolisis menggunakan reaktor fixed bed horizontal dengan laju alir N2 0,2 l/menit pada suhu 550oC selama 20 menit. Data adsorpsi COD, TSS dan Warna dideskripsikan dengan baik oleh isoterm Langmuir dengan nilai R2 sebesar 0,9869; 0,9795; 0,9972. Model kinetika digambarkan dengan model orde dua semu dengan nilai R2 0,9789; 0,9942; 0,9550. Berdasarkan hasil model isoterm dan kinetika COD, TSS dan warna, adsorpsi terjadi karena adanya ikatan kimia dengan adanya monolayer adsorbat pada permukaan magnetic biochar.

Co-Authors Abd , Ammar Ali Abd Rahman, Sunarti Abdullah Syafi’i Adi Maulana Putra Adrianto Ahmad Afriyenti, Mia Agustiyanti, Rini Dwi Agustiyanti, Rini Dwi Ahmad Fadli Ahmad Fadli Ahmad, Khairunnas Ahmudi, Ali Al Qohyum Fernando Amir Awaluddin Amun Amri Andi Mulya Adha Andreas Sahat Parsaulian Andry Sutanto Anggraini, Diva Putri Anggriani, Rara Dewi Anna Apryana Anuar, Kaspul Ari Wibowo Harahap Arief Maulana Ilham Arini Puspita Ramadhanti Arya Wiranata Asal Felix Mandrofa Asep Rusyana Aswie, Viqha Ayu Naluri Bahruddin Bahruddin Bettry Rifani Boy M Bachtiar Boy M. Bachtiar Damayanti, Elok David Andrio Dedi Meier Silaban Delvi Yolanda Desi Ivo Andri Ari Desly Fadilla Simbolon Dhani Nur Miftahudin Diana S. Ningsih Dizikri, Dizikri Drastinawati Drastinawati Drastinawati Drastinawati, Drastinawati Dwi Septiana Dwi Yuni Ernawati Edi Susanto Edy Saputra Eferius Mendrofa Eko Suhartono Emran, Talha Bin Evionitra, Azzahra Uthami Fachry Abda El Rahman Febrian Adhitya Febrina Dwi Putri Febrina Dwi Putri, Febrina Dwi Febrina, Wetri Febryanto Febryanto Fernando, Rivo Firman Tampubolon Fitra Annisa Ganis Kharisma Wiranti Ghazi M. Idroes Ghazi Mauer Idroes Gusti Ayu Nurjanah Hafiz, Fadlillahi Hamsar Hamsar Hanafi, Muhammad Rifter Hari Rionaldo Hari Rionaldo Hari Rionaldo Hasrul Hasrul Hawa, Karfika Ainil Hawa, Karfika Ainil Heni Sugesti Heriza Saputri Heru Kristianto Holyness Nurdin Singadimedja Hutagaol, Martiandes I. K. Shamsudin I. K. Shamsudin Ida Zahrina Idral Amri Idroes, Ghazi M. Idroes, Ghifari Maulana Indarty, Rozanna Sri Irfan Sarhadi Akbar Jecky Asmura Jhon Fery Marihot Tua S Jimmy Anderson Julhijah, Noni Karfika Ainil Hawa Karina Octaria Putri Kemala, Pati Kesni savitri Kesni Savitri Khairan Khairan Khairan Khairan Khairat Khairat Khairat Komalasari Komalasari Komalasari Komalasari Komang, Hendri Kusumo, Fitranto Lala, Andi Lita Darmayanti Lubis, Vanizra F. Lukman Arifin M. R. Othman M. R. Othman M. Wahyu Nugraha Martunus Martunus Martunus Martunus Maulana, Aga Maulydia, Nur B. Mery Christina Mia Afriyenti Miftahudin, Dhani Nur Miftahudin, Dhani Nur Mohd Fajri Amrullah Monika Shecilia Muh. Fadlan Alfuadi Muhammad Dian Rizky Muhammad Gus Iqbal Al-Pakningi Muhammad Mardhiansyah Muhammad Rahman Muhammad Rifki Aulia Rahman Muhammad Zen, Muhammad Muliadi Ramli Mulya, Dynna Ardilla Putri Muslim Abdurrahman, Muslim Mustapa Ardi N. Aziz N. Aziz Nabela, Tasya Nasution, Muhammad Hatta Nazaris, Nazsha Nayyazsha Neonufa, Godlief Frederick Ni putu Vidya Primarista Ningsih, Diana S. Nirmala Sari Nur B. Maulydia Nur Khairiati Nurfatihayati Nurwijayanti Oktriyono, Febri Dwi Olsy, Fradilla Othman, Mohd. Roslee Pati Kemala Peliciamanuela, Samantha Prasetyo Arva S, Prasetyo Arva Pratama, Teddy Pratama, Yudistira Putra Zelly Nugraha, Putra Zelly Putra, Bayu Eldino Putra, Yogi Lesmana Putri Anjani Putri, Karina Octaria Putri, Karina Octaria Qalbi, Tiffani Qurotullaili Qurotullaili Rafi, M Khaidiz Rahayu, Ricky Puji Rahman, Sunarti Abd Raja Heru Nur Alam Ichsan, Raja Heru Nur Alam Ramdhani Asywal Randi Sanjaya Randi Sanjaya, Randi Rendy Putra Perdana Reno Susanto Reski, M. Ricfan Anggriawan Rina Maryenti Rinaldi Idroes Rio Nanda Novendra Rivo Fernando Rizki, Juliana Romie Jhonnerie Romy Romy Romy Romy Rozanna Sri Irianty Saparullah, Zulkarnaen Sari ' Ulfayana Saryono Saryono Setiadi, Fydel Sherly Oktarizona, Shinta Anggraini Silvia Reni Yenti Simbolon, Kristin Madelin Siregar, Thasya Nurfadillah Sitorus, Mesakh Fridolin Sri Helianty Sri Helianty Sri Rezeki Muria Sugesti, Heni Suhendrayatna Suhendrayatna Sukatin, Sukatin Sunarno Sunarno Surya, Andry Pratama Susanty, Wenny Susilowati Susilowati Syafi’i, Abdullah Syafrima Wahyu Syahputra, Dede Syaiful ' Bahri SYAIFUL BAHRI Syamsiar, Syamsiar Tengku Mukhlis Teuku Rizky Noviandy Topan Herianto Trina E. Tallei Trina E. Tallei, Trina E. TRINA EKAWATI TALLEI Trisuciati Syahwardini Trisuciati Syahwardini Triwahyuni, Vanny Efia Triyana Defi Ulfaa, Suci Mas’ama Ulima, Riris Vandhe Melsa Sembiring Viqrie Wahyudi Vito Oktariandi Walter Valentino Sinaga Warman Fatra, Warman Wenny Susanty Wenny Susanty Widya Yoesepha Yelmida Azis Yemita, Sylvia Yogi Chandra Yudha, Ricky Satria Z Zulfansyah Zahriah, Zahriah Zohera Zohera Zul Amraini, Said Zulfansyah Zulfansyah Zultiniar Zultiniar Zultiniar, Zultiniar

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