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All Journal Seminar Nasional Teknik Kimia Kejuangan Makara Journal of Technology Journal of Engineering and Technological Sciences
Tedi Hudaya
Program Studi Teknik Kimia, FTI, UNPAR, Jalan Ciumbuleuit 94, Bandung
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering

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Activated Carbon Fixed-Bed Adsorber Design for Treating Chromium Hexavalent Wastewater Hudaya, Tedi; Rachmat, Velicia
Makara Journal of Technology Vol. 22, No. 3
Publisher : UI Scholars Hub

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Abstract

Pollution caused by industrial wastewater containing heavy metals is a major issue, primarily due to its toxic nature. A cheap yet effective method to deal with such wastewater is activated carbon adsorption. The purpose of this research is to evaluate and design a fixed bed adsorber with granular activated carbon as an adsorbent to process wastewater-containing chromium hexavalent (Cr 6+). Experiments show that the Langmuir isotherm fits the equilibrium data as effectively as the Freundlich isotherm. Activated carbon used in this research is Jacobi 2000® derived from bituminous coal. The lab scale inlet volumetric flow is 100 mL/h with different Cr6+ concentration for each run, 20 and 35 ppm respectively. Based on scale-up calculation with Length of Unused Bed (LUB) method, for superficial flow of 400 L.m-2.min-1 and service time of six months, the column dimensions for inlet concentration of 20 ppm are 0.62 m diameter and 2.33 m height with 1.87 m carbon bed depth. Concurrently, a slightly bigger column (0.63 m diameter and 2.37 m height column with 1.89 m carbon bed) is necessary for treating inlet concentration of 35 ppm.
Pengolahan Limbah Warna DYA Industri Pencelupan Tekstil dengan Teknologi UV / H2O2/ TiO2 Hudaya, Tedi; Tunardi, Stephen Reinaldo; Octaviany, Octaviany
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Textile wastewater often contains non-biodegradable as well as toxic dyes, for example Dianix Yellow Ace (DYA). One possible destructive method of treating such waste treatment is the Advance Oxidation Processes (AOPs), in which the oxidation of organic compounds by potent hydroxyl radicals (● OH) occurs. This research had a novelty of combining UV / H2O2 with UV / TiO2 to study the effect of treatment process’ variables, i.e. [H2O2], [TiO2] and initial pH on the rate of degradation as well as the ratio of BOD / COD until biodegradability threshold was reached.  This research employed a Central Composite Design (CCD) experimental design technique that used factorial design and included center points as well as axial points for better accuracy and understanding of the process. CCD helped create a response surface model for optimization and prediction. The variations were the concentration of H2O2 between 0.01 - 1.00 %w, TiO2 concentrations ranging from 0.80 to 3.00 g.L-1 and initial pH between 1 - 11.  The order and reaction rate constants were also determined by measuring the DYA concentrations using a spectrophotometer.  The optimum condition for DYA degradation was found at pH 3, 0.2% H2O2 and [TiO2] 3 g.L-1 with a pseudo first-order rate constant of 0.0524 min-1.  UV irradiation around 75 minutes resulted in DYA removal of 99%.  The wastewater fell into the biodegradable limit after 60 minutes treatment, with a value of BOD / COD ratio was 0.1029 so that the wastewater became biodegradable to be further treated by much cheaper biological method.
Exploration of Biomimetic Metal-Organic Catalysts for Splitting Glucose into Dihydroxyacetone and Glyceraldehyde Sumargo, Margaretha; Audreylia, Vanessa; Luivan, Samuel; Susanti, Maria Patrycia Della; Soerawidjaja, Tatang Hernas; Hudaya, Tedi
Journal of Engineering and Technological Sciences Vol. 57 No. 2 (2025): Vol. 57 No. 2 (2025): April
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2025.57.2.1

Abstract

Lactic acid is a metabolite produced during glucose glycolysis, typically generated industrially through the fermentation of glucose using microorganisms. However, the high production cost of this fermentation process makes lactic acid relatively expensive, rendering biodegradable plastics made from polylactic acid less competitive. This research focuses on the initial stages of glucose glycolysis process, in which glucose is split into dihydroxyacetone and glyceraldehyde, both of which are isomers of lactic acid. Biomimetic metal-organic catalysts composed of Mg-Zn tripolyphosphate, imidazole, and monosodium or monoammonium glutamate were tested in a water–acetonitrile reaction medium. Prior to catalyst testing, either water–acetonitrile or water–acetonitrile–acetone solutions were chosen as the reaction medium based on their effectiveness in producing phase separation. The study investigated the effects of catalyst concentrations, catalyst types, and reaction temperatures on glucose conversion, as well as the yield and selectivity of dihydroxyacetone and glyceraldehyde within 6 hours reaction time at pH 8. The results showed that these biomimetic metal-organic catalysts effectively facilitated the splitting of glucose in a water–acetonitrile solution, achieving the best glucose conversion of 57.16% at a temperature of 90°C with a catalyst concentration of 0.8%-mol.
Pengolahan Limbah Warna DYA Industri Pencelupan Tekstil dengan Teknologi UV / H2O2/ TiO2 Hudaya, Tedi; Tunardi, Stephen Reinaldo; Octaviany, Octaviany
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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

Abstract

Textile wastewater often contains non-biodegradable as well as toxic dyes, for example Dianix Yellow Ace (DYA). One possible destructive method of treating such waste treatment is the Advance Oxidation Processes (AOPs), in which the oxidation of organic compounds by potent hydroxyl radicals (● OH) occurs. This research had a novelty of combining UV / H2O2 with UV / TiO2 to study the effect of treatment process’ variables, i.e. [H2O2], [TiO2] and initial pH on the rate of degradation as well as the ratio of BOD / COD until biodegradability threshold was reached.  This research employed a Central Composite Design (CCD) experimental design technique that used factorial design and included center points as well as axial points for better accuracy and understanding of the process. CCD helped create a response surface model for optimization and prediction. The variations were the concentration of H2O2 between 0.01 - 1.00 %w, TiO2 concentrations ranging from 0.80 to 3.00 g.L-1 and initial pH between 1 - 11.  The order and reaction rate constants were also determined by measuring the DYA concentrations using a spectrophotometer.  The optimum condition for DYA degradation was found at pH 3, 0.2% H2O2 and [TiO2] 3 g.L-1 with a pseudo first-order rate constant of 0.0524 min-1.  UV irradiation around 75 minutes resulted in DYA removal of 99%.  The wastewater fell into the biodegradable limit after 60 minutes treatment, with a value of BOD / COD ratio was 0.1029 so that the wastewater became biodegradable to be further treated by much cheaper biological method.
Co-Authors Audreylia, Vanessa Luivan, Samuel Octaviany, Octaviany Rachmat, Velicia Sumargo, Margaretha Susanti, Maria Patrycia Della Tatang Hernas Soerawidjaja Tunardi, Stephen Reinaldo