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All Journal Jurnal Teknologi Prosiding Semnastek JURNAL KONVERSI Journal of Applied Sciences and Advanced Technology
Athiek Sri Redjeki
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Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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Journal : Journal of Applied Sciences and Advanced Technology

 1 
SIMULATION OF FIRE AND EXPLOSION RISK ASSESSMENT MODELING ON CARBON DISULFIDE (CS2) WASTE GAS RECOVERY PLANT ADSORBER TANK Nasta Ina Robayasa; Tri Yuni Hendrawati; Athiek Sri Redjeki
Journal of Applied Sciences and Advanced Technology Vol. 8 No. 2 (2025): Journal of Applied Science and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

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Abstract

Carbon Disulfide (CS2) is a colorless liquid that is flammable and toxic. In this study, a process safety analysis was conducted at a factory (Carbon Adsorption Plant) with the aim of determining the severity of the impact in the event of a fire, explosion, and environmental pollution or exposure to toxic gases as a result of explosions or system failures from the Adsorber tank in a plant. In this discussion, process safety analysis methods in a plant will be carried out, including QRA (Quantitative Risk Assessment), namely FERA (Fire and Explosion Risk Assessment). The simulation results of the Fire and Explosion modeling on the Adsorber tank (Carbon Adsorption Plant) obtained the fire radiation energy (Radiation Level kW/m2) with the highest value, which is SEP = 46.98 kW/m2. The maximum distance of the fire effect (FireBall) is R = 132.7 m, and the radial range of the fire effect (FireBall) that can cause immediate fatality to humans is Radius = 0 – 24.3 m. The Side-On Blast Overpressure due to the explosion (Bar) has a maximum value of Ps = 19.71 Bar. The maximum distance of the Side-On Blast Overpressure effect is Radius = 324.8 m. The distance range of the explosion effect (Side-On Blast Overpressure) that can cause immediate fatality to humans and potential fatal damage to assets/buildings (Damage Rupture) is Radius = 219.3 – 349.2 m with Ps = 0.5 – 19.71 Bar. The concentration of toxic gas and the exposure distance of toxic gas from CS2 gas (Dose Concentration and Distance) have a maximum value of C = 984,201.2 ppm. The range of the radius from the effects of Fire, Explosion and Toxic Gas Exposure (Toxic Gas Dispersion) that safe for operations activity is Radius > 611.9 m (west side) and > 99.5 m (east side).
SYNTHESIS OF ECOENZYMES FROM ORANGE AND PINEAPPLE PEEL WASTE WITH VARIABLE FERMENTATION TIME TO YIELD AS ORGANIC FERTILIZER Winarni; Athiek Sri Redjeki; Tri Yuni Hendrawati
Journal of Applied Sciences and Advanced Technology Vol. 8 No. 2 (2025): Journal of Applied Science and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

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Abstract

Most of the waste currently available is organic waste originating from household activities in the form of food scraps, seed shells from fruit and vegetables, and fruit waste. The accumulation of organic waste triggers natural decomposition, releasing methane (CH4) gas. This gas not only contributes to increased greenhouse gas levels in the atmosphere, but its accumulation under landfills also has the potential to cause explosions. Organic waste from fruit and vegetables can be processed into ecoenzymes through a fermentation process. Ecoenzymes have many uses, including fertilizer, pest control, antiseptic soap, and household cleaners. The purpose of this research was to determine the effect of time. The resulting ecoenzymes will be used as organic fertilizer. A quantity of orange peel and pineapple peel of 150 grams, respectively, was added to 100 grams of finely ground palm sugar and 1000 ml of water, then fermented for 0, 7, 14, 21, 28, 35, 42, 49, and 56 days. The fermentation results were then measured for pH and organoleptic tests were carried out in the form of visual color and aroma and tested for nitrogen (N), diphosphorus pentoxide (P2Os) and dipotassium oxide (K2O) content. The ecoenzyme obtained was then added with ash to increase the levels of N, P2O5, K2O. Based on the research results, the best time was 56 days and the best raw material ratio was 1:3:10 producing an ecoenzyme that was cloudy brown in color and had a sour aroma and a pH of 3.11. The total N, P2O5, and K2O content of the ecoenzyme produced from the fermentation process was 0.13%. The liquid organic fertilizer produced from the ecoenzyme with the addition of ash had a pH of 6,3. After adding ash, the N, P2O5, K2O content increased to 1.6%. This result still does not meet the standards of the Minister of Agriculture of the Republic of Indonesia which requires a minimum N, P2O5, and K2O content of 2%.
Co-Authors Alvika Meta Sari Heni Pujiastuti Nasta Ina Robayasa Nurul Hidayati Fithriyah Suratmin Utomo Tri Yuni Hendrawati Winarni