Article Per Year (5 Year)
p-Index From 2021 - 2026
3.069
P-Index
This Author published in this journals
All Journal Jurnal Sains dan Teknologi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains REKAYASA WAKTU: Jurnal Teknik UNIPA Al-Ard: Jurnal Teknik Lingkungan Jurnal Abdi Masyarakat Indonesia Heca Journal of Applied Sciences Leuser Journal of Environmental Studies greeners: journal of green engineering for sustainability JURNAL REKAYASA KIMIA & LINGKUNGAN Journal of Green Engineering for Sustainability
Jecky Asmura
Program Studi Teknik Lingkungan Fakultas Teknik, Universitas Riau Kampus Binawidya Km 12,5 Simpang Baru Panam, Pekanbaru 28293
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Other

Published : 85 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 85 Documents
Search

 5   6   7   8   9 
Palm Frond Waste as a Carbon Source in the Synthesis of CaO/Biochar Catalysts for the Biodiesel Production Process Helwani, Zuchra; Amraini, Said Zul; Asmura, Jecky; Siregar, Thasya Nurfadillah; Triwahyuni, Vanny Efia; Abd , Ammar Ali
Heca Journal of Applied Sciences Vol. 1 No. 1 (2023): June 2023
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/hjas.v1i1.9

Abstract

This study aims to synthesize and determine the characterization of activated CaO/Biochar and identify the effect of the mass ratio of CaO/Biochar and KOH concentration on the activity of CaO/Biochar catalysts for the synthesis of CPO-based biodiesel. CaO was obtained from eggshell waste. Biochar is obtained from palm fronds through a torrefaction process. CaO/Biochar catalyst was synthesized by impregnation process using KOH solution. The biodiesel transesterification process using CaO/Biochar catalysts. XRD analysis results obtained CaO and Ca(OH)2 compounds in the catalyst, and the basicity value of the catalyst was >9.3. The best catalytic activity of the CaO/biochar catalyst was obtained at a mass ratio of 12:10 and a concentration of 20% KOH catalyst, with a biodiesel yield of 75.1%.
Eco-Friendly Approach to Palm Oil Biodiesel Production: Torrefied Palm Frond Carbon as a Source for CaO/C/NaOH Catalysts Helwani, Zuchra; Amraini, Said Zul; Asmura, Jecky; Othman, Mohd. Roslee; Peliciamanuela, Samantha; Anggriani, Rara Dewi
Leuser Journal of Environmental Studies Vol. 2 No. 1 (2024): April 2024
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/ljes.v2i1.171

Abstract

Biomass-based sources for energy generation have attracted much attention recently due to its environmental benefits. These days, using edible oils and alkali catalysts, such as CaO, is standard practice for the transesterification step of the biodiesel synthesis process. Glycerine and methanol will form hydrogen bonds with the oxygen ions on the CaO surface, increasing the viscosity of the glycerine and causing CaO to suspend. Even though CaO was utilized directly as a catalyst in the transesterification process, extracting the CaO and glycerine from the final product will be challenging. To solve this issue, any extra metal oxides or catalyst supports ought to be impregnated into the CaO. This work has investigated the possible use of eggshells and palm fronds in developing bifunctional catalysts for biodiesel production. A series makes the processes' catalyst, including impregnation, calcination, and torrefaction. To assess the catalyst's performance, the esterification and transesterification of palm oil with a 2.9% free fatty acid content were investigated at a methanol/oil ratio of 6:1, catalyst concentration of 1-3% by weight, reaction temperature of 70 °C, and duration of 3 hours. The catalyst was found to have a specific surface area of 8.266 m2/g. There was an 89.4% yield of biodiesel produced. A viable, economical, and ecologically friendly method of producing biodiesel is to use eggshells and palm fronds in catalyst synthesis.
Analisis Beban Kerja Fisik Pekerja Pabrik Kelapa Sawit di PT X Menggunakan Metode Cardiovascular Load (CVL) Priyambada, Gunadi; Asmura, Jecky; Reza, Muhammad; Safriyana, Anggi; Aryanti, Widya
Greeners: Journal of Green Engineering for Sustainability Vol 1 No 1 (2023): Journal of Green Engineering for Sustainability
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Universal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63643/jges.v1i1.155

Abstract

The palm oil industry is developing very rapidly in Indonesia, so the absorption of labor in palm oil factories has also increased. The demand to be able to produce Crude Palm Oil (CPO) optimally pushes the risk of physical work, especially at the sorting station. This study aimed to determine the effect of age, gender, and cigarette consumption on increasing workload using the Cardiovascular Load (CVL) method. This research was carried out by collecting pulse data for 8 workers using a pulse oximeter which was carried out before work (DNI) and while working (DNK). The results showing the level of physical workload on sorting workers using the CVL method found that 4 employees had a CVL percentage between 30% - 60%, namely having a moderate physical workload that required improvement. In comparison, the other 4 employees had a CVL percentage <30%, namely no significant loading occurs. The energy consumption expended by sorting workers is ±107 Kcal/hour.
Penyisihan Fenol, H2S Dan COD Limbah Cair Lumpur Bor Dengan Proses Oksidasi Lanjut Berbasis Ozon Asmura, Jecky; Adrio, David; Suwarno, Wanda
Jurnal Rekayasa Kimia & Lingkungan Vol 12, No 2 (2017): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v12i2.8010

Abstract

Limbah cair lumpur pengeboran minyak bumi termasuk limbah B3 yang mengandung konsentrasi fenol, H2S (sulfida terlarut) dan COD berurutan sebesar 43,4 mg/L; 7,332 mg/L dan 3400 mg/L. Pada penelitian ini dilakukan penyisihan parameter tersebut menggunakan proses oksidasi lanjut berbasis ozon dengan nilai potensial oksidasi 2,08 eV. Teknik Ozonasi dilakukan dengan cara menginjeksikan ozon pada reaktor sistem kontinyu. Gas ozon yang digunakan berasal dari ozonizer WS88011i dengan produktivitas ozon kisaran 0,239-0,264 gr/jam. Penelitian ini bertujuan untuk mengetahui pengaruh pH dan waktu kontak terbaik dengan variasi masing-masing pH alami; 8; 10; 12 dan 60; 80; 100; 120 menit. Dari hasil penelitian ini menunjukkan persentase penurunan fenol sebesar 88,02% dengan waktu kontak 100 menit, H2S sebesar 79,51% dengan waktu kontak 120 menit, COD sebesar 60,46% dengan waktu kontak 100 menit. Kondisi terbaik dari penurunan konsentrasi parameter-parameter tersebut berada pada pH 12.
Pengaruh Hujan Terhadap Dosis Terbaik Koagulan PAC Untuk Menyisihkan Kekeruhan Air Baku di Pekanbaru Fitria, Dewi; Putri, Anggi Safriyana; Asmura, Jecky
Al-Ard: Jurnal Teknik Lingkungan Vol. 11 No. 2 (2026): Maret
Publisher : Department of Environmental engineering, Faculty of Science and Technology, Islamic State University Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/alard.v11i2.2136

Abstract

The Siak River is a source of raw water for drinking water in Riau. The water quality of the Siak River is influenced by the season. In the rainy season, turbidity usually increases so that it can affect the drinking water treatment process at the Drinking Water Treatment Plant (IPAM). The main treatment process at IPAM to reduce turbidity that is widely used is coagulation and flocculation. The level of water turbidity will affect the coagulant dose in the coagulation flocculation process. This study aims to determine the effect of rainfall on the dose and efficiency of PAC (Poly Aluminum Chloride) coagulant in the coagulation flocculation process, in addition to providing recommendations for a comparison of PAC coagulant doses before and after rain to IPAMs that take the Siak River as a source of raw water. River water samples were taken for a week in a row before and after rain. The method used to determine the best dose in this study was the trial and error method with a fast stirring speed of 120 rpm for 1 minute and a slow stirring speed of 40 rpm for 20 minutes and sedimentation for 15 minutes with water pH conditioning of 7. The results showed that the increase in river water turbidity after rain caused the need for PAC doses to increase. Before the rain, the turbidity of the Siak River water was 36.29 - 63.4 NTU and a dose of 50 mg/L was obtained as the best dose to reduce turbidity with an efficiency of 99.17%. While after the rain, the turbidity of the river water reached 129.8 - 165.7 NTU. The best dose obtained was 60 mg/L with a turbidity removal efficiency of 99.38%.
Co-Authors Abd , Ammar Ali Adrio, David Ahmad Fuadi Alfi Aulia Rahman Ambarwati, Nandia Rian Anggi Safriyana Anggriani, Rara Dewi Annisa Nur’alifa Anza, Nuri Aryo Sasmita Ayu Juwita Piani Basopi, Hasbi Daniel Ilham Wahyudi David Adrio David Andrio Devi Indra Nengsih DEWI FITRIA, DEWI Elvi Yenie, Elvi Febri Maharani Putri Ferdi Wranda Handayani, Devi Tri Hasdania, Annisa Meidiany Hasmad Setyadi Hiqma Aulia Husnil Fitri Ikhwanul Ikhsan Imam Suprayogi Ivnaini Andesgur Jordi Rifaldi Laksono Trisnantoro Leri Priadinanta Lita Darmayanti M Caesar Grendi Marzona Erlita Sari Mashitah, Siti Maulidya, Syukri Medio Novindra Putra Bayu Michael Slamat Muhamad Gifari Muhammad Al- Hafizd Muhammad Reza Muhammad Reza Muhammad Reza Mutiara Zikron Nabil Abidin Nandia Rian Ambarwati Natalina, Riani Nathaniel, Tiekpho Ivander Nia Ramadhani Haryadi Novalina Annisa Yudistira Novermen Novermen Nurmaida, Betharia Nurul Annisa Nurul Falah Okthasia Indra Othman, Mohd. Roslee Peliciamanuela, Samantha Praja, Silvany Mutiara Prayoga Wiguna Priyambada, Gunadi Putri, Anggi Safriyana Rangga Mahardika Retno Dwi Pangastuti Revi Lasmita Rezka Rahayu Febri Ribka Yunila Rifad Andrian Saragih Rikhatul A’ini Riki Ablan Yusandre Rio Novi Awan Rio Patrianov Nugroho Rizka Agnestianova Rosdinar Hasibuan Rosyanti, Vasella Dwi Safira Ulyani Safriyana, Anggi Septya Ardiani Septya Ardiani Shinta Elystia Siahaan, Jessica Silvi Nora Siregar, Thasya Nurfadillah Sri Febria Suci Hartina Fani Putri Suci Sukmawati Suryafit, Sagit Suwarno, Wanda Syarfi Daud Syarfi Syarfi Syarfi Syarfi Triwahyuni, Vanny Efia Wanda Lestari, Wanda Wanda Suwarno Widya Aryanti Widya Aryanti, Widya Wulandari Wulandari Yawaritsa Yawaritsa Yogi Septian Malik Yohanes Yohanes Yudhi Hanafi Syadli, Yudhi Hanafi Zuchra Helwani, Zuchra