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All Journal Al-Ard: Jurnal Teknik Lingkungan Lingkar : Journal of Environmental Engineering Journal of Engineering Science and Technology Management Jurnal Ilmiah Multidisiplin Indonesia
Darojat, Khumaidah
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Physics

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PERFORMANCE EVALUATION OF SEWAGE TREATMENT PLANT USING BIOCHIP MEDIA IN MBBR TECHNOLOGY : CASE STUDY “X GARMENT, CENTRAL JAVA Yusrina, Afifah; Ardhianto, Rachmad; Darojat, Khumaidah; Rahman, Arief
Lingkar: Journal of Environmental Engineering Vol. 5 No. 2 (2024): LINGKAR : Journal of Environmental Engineering
Publisher : Department of Environmental Engineering (Prodi Teknik Lingkungan), Fakultas Sains dan Teknologi, UIN Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ljee.v5i2.5583

Abstract

“X” garment industry’s Sewage Treatment Plant (STP) was built to treat domestic wastewater with an inflow capacity of 500 m3/day. The main principle of the STP technology is an attached growth process with Moving Bed Biofilm Reactor (MBBR) technology using biochip media. Wastewater treated at the STP must meet the water quality standards of Ministry of Environment and Forestry Regulation 68 of 2016 before being discharged into water bodies. Therefore, this research aimed to evaluate the “X” garment industry’s STP performance. Wastewater sampling was carried out at the inlet and outlet of STP. Water quality parameters analyzed included pH, BOD, COD, TSS, oil and grease, ammonia, and total coliforms. The removal efficiency value is obtained from the calculation of sampling results. The analysis showed that all treated water parameters met the water quality standards throughout the research period. Hence, the average removal efficiency value at the STP for each parameter was above 90%.
Pengaruh Proses Biodrying dalam Pemanfaatan Biomasa menjadi Solid Recovery Fuel (SRF) Darojat, Khumaidah; Yusrina, Afifah; Ardhianto, Rachmad; Hendri
Al-Ard: Jurnal Teknik Lingkungan Vol. 10 No. 1 (2024): September
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.v10i1.2187

Abstract

In developing countries, municipal solid waste remains a major unresolved problem. One way to manage municipal solid waste is to produce biomass. Biomass management from solid waste involves a natural or mechanically assisted biological drying process using bulking agents. This study employed natural and mechanical biodrying systems with blower assistance and corn starch industrial wastewater bulking agents. A blower expedites the process of reducing waste weight. The reactor with the blower exhibited the largest decrease in water content under the bulking agent addition conditions when the water content fell below 15%. Using a blower in the biodrying process reduces the drying time of biomass raw material by 50% compared to the non-blower method, which takes up to 12 days. 1 L of the bulking agent is the most effective biodrying dose. The percentage carbon value in the biodrying process was 42.02% higher when a bulking agent was used than a non-bulking agent (35.98%) and a blower was not used (40.82%). Including a bulking agent during biodrying enhances the composition's elemental value and speeds up the reduction and evaporation or drying of waste.
Quantification of CO₂ Emission Reductions from Biomass Co-firing at a Coal-Fired Power Plant Using the IPCC 2006 Tier 2 Methodology Darmana, Tasdik; Darojat, Khumaidah; Kesuma, Dyah Ayu; Ariman, Ariman; Hadi, Veriah
Jurnal Ilmiah Multidisiplin Indonesia (JIM-ID) Vol. 5 No. 01 (2026): Jurnal Ilmiah Multidisplin Indonesia (JIM-ID), January 2026
Publisher : Sean Institute

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Abstract

Coal-fired power plants are the dominant source of electricity in Indonesia but also a major contributor to greenhouse gas (GHG) emissions, posing challenges to the country’s net-zero emission commitment by 2060. This study aims to quantify the impact of biomass co-firing on emission reduction and carbon credit potential in Pangkalan Susu, Kabupaten Langkat, North Sumatra Power Plant using the 2006 IPCC Guidelines (Tier 2). Operational data from 2022 (100% coal) and 2024 (coal–biomass mix) were analyzed through a mass and energy balance approach. Results indicate that integrating 41,324 tons of solid biomass and 3,798 kiloliters of liquid biomass in 2024 reduced coal consumption by 24,379 tons and cut CO₂ emissions by 38,419 tons compared to the 2022 baseline. Although the substitution rate was only 1.72% of the fuel mix, the reduction was measurable and economically significant, providing potential carbon credit value. These findings highlight biomass co-firing as a viable strategy to reduce GHG emissions and support Indonesia’s energy transition, while emphasizing the need for advanced methodologies (Tier 3, LCA) and sustainable biomass supply chains to ensure long-term implementation.
Analysis of Air Pollution Trajectory Using the HYSPLIT Model Tarif, Eqiu Alkahfi; Budhicahyanto, Moehammad; Darojat, Khumaidah
Journal of Engineering Science and Technology Management (JES-TM) Vol. 5 No. 2 (2025): September 2025
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v5i2.424

Abstract

The growth of industrial activities has contributed significantly to the increase in air pollutant emissions, adversely affecting human health and environmental quality. Understanding the direction and potential dispersion of air pollutants is therefore a crucial aspect of air pollution control efforts, particularly for mitigating transboundary and transregional impacts. This study aims to analyze the movement trajectories of air pollutants released from industrial stacks using the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model. Forward trajectory simulations were conducted for a duration of 240 hours (10 days) using meteorological data from the Global Forecast System (GFS). The emission source was assumed to be located in the Perawang industrial area, with a stack height of 100 meters above ground level. The simulation results indicate that during the dry season (East Monsoon), the dominant direction of air mass movement tends to be northward to northeastward, crossing the Malacca Strait and potentially reaching regions of Malaysia, Thailand, Vietnam, and southern China. These findings suggest a significant potential for long-range and transboundary transport of air pollutants, highlighting the need for strengthened industrial emission control and enhanced regional cooperation in air pollution management.
Co-Authors Arief Rahman ariman, ariman Budhicahyanto, Moehammad Darmana, Tasdik ENDRI ENDRI Hadi, Veriah Kesuma, Dyah Ayu Rachmad Ardhianto Ganjar Samudro Yusrina, Afifah