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Syahrir, Muallim
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Computer Science & IT Engineering

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Pengolahan Limbah Tongkol Jagung Menjadi Asap Cair dengan Metode Pirolisis Lambat Syahrir, Muallim; Mahyati, Mahyati
INTEK: Jurnal Penelitian Vol 6 No 1 (2019): April 2019
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (313.429 KB) | DOI: 10.31963/intek.v6i1.1209

Abstract

The purpose of this study was to determine the temperature, time and the optimum size of the pyrolysis process to yield liquid smoke, and to know the grade of liquid smoke. Pyrolysis process were done by varying the temperature 350oC, 400oC, 450oC, 500oC, the time variation of 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes, 180 minutes and a variety of fine size (3/8 inch), medium (1 inch), coarse (1.5 inches), after the analysis of pH, specific gravity, acid tertitrasi and total phenol content analysis. Liquid smoke that optimum results are calculated to determine whether the economic feasibility of this research can be continued at the industrial stage. The research showed the optimum temperature of 400oC at a yield of 45.5%, the optimum time of 120 minutes resulted in a yield of 46% and smoother optimum size at a yield of 47%. Total acid is between 6.8054% - 7.2746%, pH between 1.8 to 1.9 with phenol levels between 3.4456% - 4% in 1569 to produce liquid smoke to grade 4.
Utilization of Green Betel Leaf as Adsorbent of Lead and Copper Metals in Artificial Wastewater Syahrir, Muallim; Yasser, M; Rosalin, Rosalin
INTEK: Jurnal Penelitian Vol 10 No 1 (2023): April 2023
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v10i1.4348

Abstract

Green betel leaf contains phenolic compounds that can bind metal ions. The purpose of this study was to determine the effect of variations in the mass of green betel leaf and stirring time based on the efficiency and adsorption capacity of lead and copper metals in artificial wastewater. Adsorption process using the stirring with a magnetic stirrer. The variation used is the stirring time of 30 and 60 minutes and the mass of the adsorbent is 25,30,35, 40 grams. Artificial wastewater is made from 1 gram of each Pb(NO3)2 and CuCl2.2H20 in 500 ml of aquadest. Analysis of the metal using the AAS (Atomic Absorption Spectrophotometry). The results of the analysis showed that the optimum adsorption of lead metal was at a mass of 30 grams of betel leaf and a stirring time of 1 hour, where green betel leaves were able to adsorb 99.96% of lead metal, from a Pb level of 6435 ppm to 2.48 ppm. While the optimum results for adsorption of copper metal were 35 grams of betel leaf mass and 30 minutes of stirring time, where green betel leaves were able to adsorb 49.83% copper metal, from 158 ppm Cu level to 79.27 ppm.
Co-Authors Mahyati, Mahyati Rosalin, Rosalin Yasser, M