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All Journal International Journal of Social Service and Research Makara Journal of Technology Aceh International Journal of Science and Technology
Asri Gani
Department of Chemical Engineering, Faculty of Engineering, University of Syiah Kuala, Banda Aceh 23111, Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Physical Characterization and Desulfurization of Biobriquette Using Calcium-Based Adsorbent Mahidin, Mahidin; Gani, Asri; Khairil, Khairil
Makara Journal of Technology Vol. 15, No. 2
Publisher : UI Scholars Hub

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Abstract

Combustion of coal and co-combustion of their co-fuel contribute to gas emissions. Among the gas emissions are SOx, NOx, CO and CO2. Introduction of calcium based adsorbent is addressed to absorb SO2 that release to the atmosphere during the combustion process. Objective of the research is at first to observe the physical characteristics of biobriquettes as a function of briquette compositions (coal to palm kernel shell ratios) and Ca/S ratios (Ca in adsorbent and S in briquette) using a natural adsorbent (shellfish waste). The second objective is to investigate desulfurization characteristics as a function of Ca/S ratios and desulfurization temperatures at coal to palm kernel shell ratio of 90:10 (wt %). Ratios of coal to palm kernel shell in this study are 90:10, 80:20, 70:30, 60:40 and 50:50; and Ca/S ratios are 1:1, 1.25:1, 1.5:1, 1.75:1 and 2:1. Binding agent used is the mixture of Jatropha curcas seeds and starch as much as 10% (wt). It was found that introducing the palm kernel shell and adsorbents in the coal briquette affect the water resistant and compressive strength. The highest water resistance and compressive strength were 5,165 second and 34 kg/cm2, respectively. The lowest SO2 level found in this study was 1 ppm for all Ca/S ratios, except for 1:1.
Use of Green Mussel Shell as a Desulfurizer in the Blending of Low Rank Coal-Biomass Briquette Combustion Mahidin, Mahidin; Gani, Asri; Hani, M. Reza; Syukur, Muhammad; Hamdani, Hamdani; Khairil, Khairil; Rizal, Samsul; Hadi, Abdul; Mahlia, T.M.I.
Makara Journal of Technology Vol. 20, No. 2
Publisher : UI Scholars Hub

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Calcium oxide-based material is available abundantly and naturally. A potential resource of that material comes from marine mollusk shell such as clams, scallops, mussels, oysters, winkles and nerites. The CaO-based material has exhibited a good performance as the desulfurizer or adsorbent in coal combustion in order to reduce SO2 emission. In this study, pulverized green mussel shell, without calcination, was utilized as the desulfurizer in the briquette produced from a mixture of low rank coal and palm kernel shell (PKS), also known as bio-briquette. The ratio of coal to PKS in the briquette was 90:10 (wt/wt). The influence of green mussel shell contents and combustion temperature were examined to prove the possible use of that material as a desulfurizer. The ratio of Ca to S (Ca = calcium content in desulfurizer; S = sulfur content in briquette) were fixed at 1:1, 1.25:1, 1.5:1, 1.75:1, and 2:1 (mole/mole). The burning (or desulfurization) temperature range was 300-500 °C; the reaction time was 720 seconds and the air flow rate was 1.2 L/min. The results showed that green mussel shell can be introduced as a desulfurizer in coal briquette or bio-briquette combustions. The desulfurization process using that desulfurizer exhibited the first order reaction and the highest average efficiency of 84.5%.
Public Perception Of Noise (Case Study: Malikussaleh University Aksi Adb Project Adella, Faradya; Gani, Asri; Deli, Anwar
International Journal of Social Service and Research Vol. 4 No. 05 (2024): International Journal of Social Service and Research (IJSSR)
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/ijssr.v4i05.837

Abstract

Malikussaleh University (Unimal) is one of the four universities selected to get a loan from the Asian Development Bank (ADB) related to the Advanced Knowledge and Skills for Sustainable Growth in Indonesia (AKSI) project. In the construction process, such as installation activities and building infrastructure from equipment, it can trigger unexpected noise, so it can have an impact on people's health and comfort. This research was conducted in five new building construction locations on the Bukit Indah campus of Malikussaleh University. The purpose of this study is to see the perception and attitude of the community around the construction project activities. The research method used was the distribution of questionnaires and using the Likert scale to measure the attitudes, opinions, and perceptions of the research respondents. The results of the questionnaire will be processed using SPSS software. The results showed that the overall average value of the respondents' perception of noise was 2.35. This figure shows that the current place of work/study/living does not feel noisy due to ongoing construction work.
Analysis Of Physical And Chemical Impact On The Krueng Montala River, Aceh Besar Regency: Sand And Stone Mining Activity Effect Muhibbuddin, Muhibbuddin; Gani, Asri; Aulia, M Prayogie; Arahman*, Nasrul
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.31526

Abstract

Rivers are important for human survival providing raw water for the community's clean water needs. Rivers also provide sand, gravel, and rocks commonly used for construction. However, improper exploitation of the river without considering environmental sustainability may cause future damage to it. The damage is usually caused by mining activities violating environmental regulations. The main point of this study is to evaluate the changes in the riverbank and riverbed of Krueng Montala River, Aceh, Indonesia, due to the mining activity around that place. The method used to analyze the changes was measuring the river's topographical contours at the end of mining activities and comparing the results with the initial licensing data based on the Mining License Number 540/DPMPTSP/414/IUP-OP/2020. Some of the equipment used in evaluating the condition of the river includes a Nikon Total Station, standard measuring tanks, Garmin 62Csx, and GPS. The measured data was also compared to the Technical Recommendation Number SA.02.03/BWS1/1542 from the River Basin Office of Sumatera 1. Based on the technical recommendation, the sufficient excavation volume is 10,201.44 m3 . The field data for lost and excavated materials at the research location was 40,861.4 m3 , and the total riverbank material loss at the study location was 7,566.33 m3 . The impact of mining activities on chemical parameters in the Krueng Montala River is still within the standard limits permitted by the government, such as TDS, TSS, COD, and BOD parameters. The influence of mining activities on chemical parameters in the Krueng Montala River did not show results that exceeded the standard limits permitted by the government, such as TDS, TSS, COD, and BOD parameters.
Co-Authors Abdul Hadi Adella, Faradya Arahman*, Nasrul Aulia, M Prayogie Deli, Anwar Hamdani Hamdani Hani, M. Reza Ketut Tirtayasa Khairil Khairil Mahidin Mahidin Muhammad Syukur Muhibbuddin Muhibbuddin T.M.I. Mahlia