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Modeling the Dispersion of Air Pollution Due to Volcanic Eruptions Sufitri, Yumita; Bachtiar, Vera Surtia; Putra, Alqadri Asri; Nugroho, Sugeng
International Journal of Disaster Management Vol 7, No 3 (2024)
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v7i3.40546

The eruption of Mount Marapi has caused damage to agricultural land and the temporary closure of Minangkabau International Airport. Simulations were conducted using HYSPLIT to detect the initial direction of volcanic ash dispersion. The trajectory analysis from HYSPLIT indicated that the volcanic ash dispersion on December 3, 2023, and January 5, 2024, extended beyond 100 km, while on December 22, 2023, January 19, February 4, and February 23, 2024, the dispersion was less than 100 km. HYSPLIT models indicated that the ash dispersion was directed towards Minangkabau Airport during the closure period. As a result, HYSPLIT can be considered a suitable software for simulating volcanic ash dispersion. Concentration evaluations based on Government Regulation No. 22 of 2022 revealed that several areas exceeded the applicable air quality standards. Validation using data from the HIMAWARI satellite and NASA WorldView indicated similar dispersion direction patterns in the simulation results. However, the Mann-Whitney test revealed significant differences when comparing the concentration outputs from HYSPLIT to PM2.5 levels before and during the eruption, based on PM2.5 monitoring documents from GAW Kototabang. Recommended mitigation measures include prioritizing the volcanic ash hazard zone within a 0-10 km radius from the crater by restricting activities and planning evacuation routes and safe areas away from volcanic ash exposure.

The Effectiveness of Gambir Leaves (Uncaria gambir roxb) as A Biocoagulant in Reducing Pollutant in Palm Oil Mill Effluent Massaid, Andre; Putra, Syawal Andika; Anandhito, Muhammad Varrel; Habibullah, Ahmad Zaki; Maharjan, Namita; Putra, Alqadri Asri
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 3 (2024): November 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i3.163

Crude Palm Oil (CPO) production increased to 46.82 tons in 2022 (BPS), and this manufacturing process produces wastewaste that is harmful to the environment. The quality standards for palm oil mill effluent (POME) include BOD 100 mg/L, COD 350 mg/L, TSS 250 mg/L, oil and grease 25 mg/L, and total nitrogen 50 mg/L. POME with high organic content can cause eutrophication, siltation, and death of aquatic organisms. One method of treating this wastewater can be carried out through coagulation. In water treatment, chemical coagulants are typically used to remove impurities, but biocoagulants from Gambir leaves offer a natural and environmentally friendly alternative. These biocoagulants can effectively treat water while reducing the need for synthetic chemicals, presenting a sustainable solution. Gambir leaves contain polyphenolic compounds that are effective as biocoagulants. This study examines the effectiveness of Gambir leaves as a biocoagulant in reducing palm oil effluent pollutants, including TSS, BOD, COD, oil and grease, and total nitrogen. This study includes the initial steps in making biocoaglant until examining POME wastewater. Based on the results of the study, it was found that Gambir leaves extract has the potential to reduce pH and remove TSS, BOD, COD, oil and grease, and total nitrogen contained in POME with a concentration variation of 1000 mg/L, 2000 mg/L, 3000 mg/L, and 4000 mg/L.

The Effectiveness of Gambir Leaves (Uncaria gambir roxb) as A Biocoagulant in Reducing Pollutant in Palm Oil Mill Effluent Massaid, Andre; Putra, Syawal Andika; Anandhito, Muhammad Varrel; Habibullah, Ahmad Zaki; Maharjan, Namita; Putra, Alqadri Asri
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 3 (2024): November 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i3.163

Crude Palm Oil (CPO) production increased to 46.82 tons in 2022 (BPS), and this manufacturing process produces wastewaste that is harmful to the environment. The quality standards for palm oil mill effluent (POME) include BOD 100 mg/L, COD 350 mg/L, TSS 250 mg/L, oil and grease 25 mg/L, and total nitrogen 50 mg/L. POME with high organic content can cause eutrophication, siltation, and death of aquatic organisms. One method of treating this wastewater can be carried out through coagulation. In water treatment, chemical coagulants are typically used to remove impurities, but biocoagulants from Gambir leaves offer a natural and environmentally friendly alternative. These biocoagulants can effectively treat water while reducing the need for synthetic chemicals, presenting a sustainable solution. Gambir leaves contain polyphenolic compounds that are effective as biocoagulants. This study examines the effectiveness of Gambir leaves as a biocoagulant in reducing palm oil effluent pollutants, including TSS, BOD, COD, oil and grease, and total nitrogen. This study includes the initial steps in making biocoaglant until examining POME wastewater. Based on the results of the study, it was found that Gambir leaves extract has the potential to reduce pH and remove TSS, BOD, COD, oil and grease, and total nitrogen contained in POME with a concentration variation of 1000 mg/L, 2000 mg/L, 3000 mg/L, and 4000 mg/L.

The Material and Energy Conversion Potential from Municipal Waste in Padang City: Business Chance and Future Prospective Putra, Alqadri Asri; Rasyidin, Azwar
Andalas Journal of Electrical and Electronic Engineering Technology Vol. 4 No. 1 (2024): May 2024
Publisher : Electrical Engineering Dept, Engineering Faculty, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/ajeeet.v4i1.104

Padang City, the capital city of West Sumatra Province, is expected to grow and reach a population of 1 million by 2035. However, this growth also means an increase in municipal solid waste, projected to be about 256,000 tons annually. At the same time, there is potential for waste-to-energy conversion in Padang City due to the demand for renewable energy and business opportunities. This study is based on existing literature and data, which were analyzed using a statistical approach and municipal solid waste management calculations. The study conducted scenarios that show potential energy conversions. The first scenario involves converting solid waste to gas and using it directly as biogas. The second scenario involves converting biogas from solid waste to electricity and distributing it for household use. The last scenario consists of using small and medium-sized biodigesters to convert gas into electricity, which will then be used as a charging station for electric vehicles (EVs). The first scenario can generate the most significant profit, while the third scenario suits small and medium businesses. However, each scenario has its pros and cons. Still, it's crucial to consider regulation issues, government support, and public awareness of the environmental problems to implement these waste-to-energy conversion practices on-site successfully.

Performance of Membrane Bioreactor in Nitrogen Removal using Anammox Bacteria Cultivated from Lake Koto Baru Zulkarnaini, Zulkarnaini; Amanda, Tiffany Azhra; Putra, Alqadri Asri; Komala, Puti Sri; Nilawati, Dewi; Widyarani, Widyarani; Sembiring, Tarzan; Mawarda, Panji Cahya; Septevani, Athanasia Amanda; Rustama, Mia Miranti; Andriyani, Rina
Makara Journal of Science Vol. 30, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Anaerobic ammonium oxidation (anammox) is the biological conversion of ammonium to nitrogen gas (N2) using nitrite as an electron acceptor. This study evaluated the performance of a membrane bioreactor (MBR) in nitrogen removal at room temperature using Candidatus Brocadia fulgida, an anammox bacterium previously cultivated from Lake Koto Baru, Tanah Datar, Indonesia. The MBR was operated for 48 days with a hydraulic retention time of 24 h under a continuous supply of ammonium and nitrite, with both substrates provided at influent concentrations of 70, 150, and 250 mg-N/L. Samples were collected twice a week and analyzed via UV–Vis spectrophotometry. The stoichiometric ratios of ∆NO2−-N/∆NH4+-N and ∆NO3−-N/∆NH4+-N were 1.13 and 0.15, respectively, which were consistent with the anammox reaction. The maximum nitrogen removal performance, including nitrogen removal rate, ammonium conversion efficiency, and nitrogen removal efficiency (NRE), reached 0.515 kg-N/m³∙d, 92.76%, and 91.27%, respectively, at a nitrogen loading rate of 0.566 kg-N/m³∙d. Anammox bacteria from Koto Baru Lake showed high NRE at room temperature using MBR.

Comparative Study of Physical Components and Degradability of Natural Fibers as Alternative Biofilm Media for Wastewater Treatment Systems Massaid, Andre; Putra , Syawal Andika; Putri , Dewi Yusnisa; Zulkarnaini, Zulkarnaini; Putra, Alqadri Asri
Indonesian Journal of Environmental Management and Sustainability Vol. 10 No. 4 (2026): December
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.2026.10.4.290-299

This study supports the Sustainable Development Goals (SDGs) on clean water and sustainable production by evaluating the potential of natural fibers as biofilm media for wastewater treatment. Seven types of media were assessed, including polyurethane sponge as a control, straw, coconut fiber, sugar palm fiber, sphagnum moss, oil palm empty fruit bunch (EFB), and tree fern board. The evaluation was conducted over a 30-day period based on physical characteristics (pore size and porosity) and water quality parameters (pH, TDS, TSS, and COD), complemented by organoleptic observations. Media performance was ranked using the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). The results indicated that tree fern board (TOPSIS score 0.833) and sugar palm fiber (TOPSIS score 0.778) were the most promising natural biofilm media, exhibiting porous structures, good physical stability, and consistent biofilm formation, with performance approaching that of the polyurethane sponge. In contrast, straw, EFB, coconut fiber, and sphagnum moss showed lower performance due to rapid degradation or insufficient structural stability, which adversely affected water quality. Overall, this study confirms that tree fern board and sugar palm fiber are viable and sustainable alternatives to synthetic biofilm media, with strong potential for long-term application in environmentally friendly wastewater treatment systems.

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