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Papers by nur zen

Drinking water industries in Indonesia generally use the ozonation method as a disinfection proce... more Drinking water industries in Indonesia generally use the ozonation method as a disinfection process (more than 90%). However, it has a negative effect in oxidizing bromide (Br–) into bromate, which is a carcinogenic compound associated with several clinical symptoms, such as nausea, vomit and even kidney failure. Meanwhile, bromide anion is thermodynamically easy to be oxidized into bromine (Eo: 1.074 V), resulting in an effective removal of bromide. A double-chamber electrocatalytic reactor with a working volume of 100 L was made with platinum-doped carbon cloth, copper, and proton exchange membrane as anode, cathode, and separator, respectively. The reactor was designed as a horizontal rotating drum electrocatalytic reactor which will accelerate the oxidation of Br/Br2 and enhance the transfer rate of Br2 from liquid to gas phase. Potential, flowrate, anode rotation speed and salt concentration were chosen as evaluated parameters. Bromide concentration of 0.3858 mg/L was significa...

Jurnal Riset Teknologi Pencegahan Pencemaran Industri, 2020

This study aimed to identify the effect of substrate concentration on the performance of A Three ... more This study aimed to identify the effect of substrate concentration on the performance of A Three chambers Microbial Salinity Cell (a three chambers MSC). In this study, 3 three chambers MSC was made of plexy glass with total volume of 200 ml. Alumunium wrapped with with platinum on vulcan carbon cloth were used as electrodes,with each working area 63 cm2. The results showed that a Three chambers Microbial Salinity Cell was able to generate electricity and at the same time removed salinity. The degree of electricity deneration and salinity removal were influenced by initial substrate concentration in the anode chamber. The higher substrate concentration, the better performance of MSC. The best performance of MSC achieved when COD was 2034 mg/L, resulted in maximum voltage of 0. 44 V, and maximum current density of 0.29 mA/m2. With % CE was 5.4%. The maximum conductivity increase in salinity chamber was from 11.2 µS/cm to 1027 µS/cm (salinity 0.57% ppt).

Journal of Ecological Engineering, 2020

Microbial Salinity Cell (MSC) can simultaneously desalinate water and generate electricity from t... more Microbial Salinity Cell (MSC) can simultaneously desalinate water and generate electricity from the biodegradation of organic compound in wastewater. Utilization of a three-chambers configuration system along with electrolyte recirculation, creates a desalination process which occurs when the salt ions from the anode and cathode chambers are accumulated into the middle chamber, driven by the electrical energy generated from the organic compound biodegradation. The performance of three-chambers electrolyte recirculation MSC was investigated using three different NaCl concentrations of 2.0 g/L, 4.0 g/L, and 8.0 g/L, with the acetate concentration of 0.82 g/L. At 2.0 g/L NaCl, the maximum power density production was 42.76 mW/m2, increasing conductivity in the middle chamber from 15.09 μS/cm to 0.74 mS/cm. At 4.0 g/L, the maximum power density reached was 53.37 mW/m2, and conductivity in the middle chamber was raised from 60.08 μS/cm to 2.74 mS/cm. At 8.0 g/L, the power density was 29....

Separation and Purification Technology

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

Microbial fuel cell (MFC) is a new proposed technology reported to generate renewable energy whil... more Microbial fuel cell (MFC) is a new proposed technology reported to generate renewable energy while simultaneously treating wastewater. Membraneless microbial fuel cell (ML-MFC) system was developed to eliminate the requirement of membrane which is expensive and prone to clogging while enhancing electricity generation and wastewater treatment efficiency. For this purpose, a reactor was designed in two chambers and connected via three pipes (1 cm in diameter) to enhance fluid diffusion. Influent flowrate was maintained by adjusting peristaltic pump at the base of anaerobic chamber. Carbon cloth (235 cm2) was used as anode and paired with gas diffusion layer (GDL) carbon-Pt as cathode. Anaerobic sludge was filtered and used as starter feed for the anaerobic chamber. The experiment was carried out by feeding synthetic wastewater to anaerobic chamber; while current response and potential were recorded. Performance of reactor was evaluated in terms of chemical oxygen demand (COD). Electro...

Separation and Purification Technology

Journal of Environmental Chemical Engineering

Journal of Water Process Engineering

Indonesian Journal of Chemistry

Electrodes, as well as microorganisms, are key materials for the development of bioelectrosynthes... more Electrodes, as well as microorganisms, are key materials for the development of bioelectrosynthesis cell reactor. Materials used as electrodes should be inert, crystalline in structure with high surface area and porous morphology, enhancing their electroactive and adsorptive properties. Carbon material derived from coconut shell was modified by simultaneous sintering-activation methods, FeCl3 and ZnCl2 were supplemented at temperature 900 °C at the non-atmospheric condition. The modified carbon was then molded with polyvinyl alcohol as a binder and the temperature was maintained at 80 °C and 10 ton of pressure. Molded carbon was then installed in bioelectrosynthesis cell with a working volume of 200 mL, as a cathode. XRD, BET, and SEM measurements showed the transformation of carbon surface from amorphous into the crystalline, increased surface area (11 times higher) and higher porosity (up to 500 nm). This cathode modification was able to increase current density up to 4 times and ...

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

The remaining reagent from the sample analysis process become a significant source of hazardous w... more The remaining reagent from the sample analysis process become a significant source of hazardous waste of laboratory tasting activities. Methylene blue, phenol and oil are pollutants common in the remaining reagent waste. The electrocatalytic reactor is effective oxidation units for these organic pollutants. The reactor was made for a 50 L capacity with cylindrical metal oxide as the anode. The three anode which 6 cm in diameter and 50 cm in length were paired stainless cathode with the distance of 2.5 cm. The reactor was also equipped with a stirrer that is connected to the motor so that the mass transfer and oxidizing agents is more effective. The reactor application was carried out by feeding the remaining reagent waste into the electrocatalytic unit and giving DC potential 5 Volt. Each COD content for reagent waste of detergent: 2864 mg/L, phenol: 838 mg/L and oil: 708 mg/L. The reactor has reduced COD to 2157 mg/L (detergent), 399 mg/L (phenol) and 506 mg/L (oil) for 120 minute...

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

Jurnal Riset Teknologi Pencegahan Pencemaran Industri, 2016

Chemical Engineering Journal, 2015

ABSTRACT

Drinking water industries in Indonesia generally use the ozonation method as a disinfection proce... more Drinking water industries in Indonesia generally use the ozonation method as a disinfection process (more than 90%). However, it has a negative effect in oxidizing bromide (Br–) into bromate, which is a carcinogenic compound associated with several clinical symptoms, such as nausea, vomit and even kidney failure. Meanwhile, bromide anion is thermodynamically easy to be oxidized into bromine (Eo: 1.074 V), resulting in an effective removal of bromide. A double-chamber electrocatalytic reactor with a working volume of 100 L was made with platinum-doped carbon cloth, copper, and proton exchange membrane as anode, cathode, and separator, respectively. The reactor was designed as a horizontal rotating drum electrocatalytic reactor which will accelerate the oxidation of Br/Br2 and enhance the transfer rate of Br2 from liquid to gas phase. Potential, flowrate, anode rotation speed and salt concentration were chosen as evaluated parameters. Bromide concentration of 0.3858 mg/L was significa...

Jurnal Riset Teknologi Pencegahan Pencemaran Industri, 2020

This study aimed to identify the effect of substrate concentration on the performance of A Three ... more This study aimed to identify the effect of substrate concentration on the performance of A Three chambers Microbial Salinity Cell (a three chambers MSC). In this study, 3 three chambers MSC was made of plexy glass with total volume of 200 ml. Alumunium wrapped with with platinum on vulcan carbon cloth were used as electrodes,with each working area 63 cm2. The results showed that a Three chambers Microbial Salinity Cell was able to generate electricity and at the same time removed salinity. The degree of electricity deneration and salinity removal were influenced by initial substrate concentration in the anode chamber. The higher substrate concentration, the better performance of MSC. The best performance of MSC achieved when COD was 2034 mg/L, resulted in maximum voltage of 0. 44 V, and maximum current density of 0.29 mA/m2. With % CE was 5.4%. The maximum conductivity increase in salinity chamber was from 11.2 µS/cm to 1027 µS/cm (salinity 0.57% ppt).

Journal of Ecological Engineering, 2020

Microbial Salinity Cell (MSC) can simultaneously desalinate water and generate electricity from t... more Microbial Salinity Cell (MSC) can simultaneously desalinate water and generate electricity from the biodegradation of organic compound in wastewater. Utilization of a three-chambers configuration system along with electrolyte recirculation, creates a desalination process which occurs when the salt ions from the anode and cathode chambers are accumulated into the middle chamber, driven by the electrical energy generated from the organic compound biodegradation. The performance of three-chambers electrolyte recirculation MSC was investigated using three different NaCl concentrations of 2.0 g/L, 4.0 g/L, and 8.0 g/L, with the acetate concentration of 0.82 g/L. At 2.0 g/L NaCl, the maximum power density production was 42.76 mW/m2, increasing conductivity in the middle chamber from 15.09 μS/cm to 0.74 mS/cm. At 4.0 g/L, the maximum power density reached was 53.37 mW/m2, and conductivity in the middle chamber was raised from 60.08 μS/cm to 2.74 mS/cm. At 8.0 g/L, the power density was 29....

Separation and Purification Technology

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

Microbial fuel cell (MFC) is a new proposed technology reported to generate renewable energy whil... more Microbial fuel cell (MFC) is a new proposed technology reported to generate renewable energy while simultaneously treating wastewater. Membraneless microbial fuel cell (ML-MFC) system was developed to eliminate the requirement of membrane which is expensive and prone to clogging while enhancing electricity generation and wastewater treatment efficiency. For this purpose, a reactor was designed in two chambers and connected via three pipes (1 cm in diameter) to enhance fluid diffusion. Influent flowrate was maintained by adjusting peristaltic pump at the base of anaerobic chamber. Carbon cloth (235 cm2) was used as anode and paired with gas diffusion layer (GDL) carbon-Pt as cathode. Anaerobic sludge was filtered and used as starter feed for the anaerobic chamber. The experiment was carried out by feeding synthetic wastewater to anaerobic chamber; while current response and potential were recorded. Performance of reactor was evaluated in terms of chemical oxygen demand (COD). Electro...

Separation and Purification Technology

Journal of Environmental Chemical Engineering

Journal of Water Process Engineering

Indonesian Journal of Chemistry

Electrodes, as well as microorganisms, are key materials for the development of bioelectrosynthes... more Electrodes, as well as microorganisms, are key materials for the development of bioelectrosynthesis cell reactor. Materials used as electrodes should be inert, crystalline in structure with high surface area and porous morphology, enhancing their electroactive and adsorptive properties. Carbon material derived from coconut shell was modified by simultaneous sintering-activation methods, FeCl3 and ZnCl2 were supplemented at temperature 900 °C at the non-atmospheric condition. The modified carbon was then molded with polyvinyl alcohol as a binder and the temperature was maintained at 80 °C and 10 ton of pressure. Molded carbon was then installed in bioelectrosynthesis cell with a working volume of 200 mL, as a cathode. XRD, BET, and SEM measurements showed the transformation of carbon surface from amorphous into the crystalline, increased surface area (11 times higher) and higher porosity (up to 500 nm). This cathode modification was able to increase current density up to 4 times and ...

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

The remaining reagent from the sample analysis process become a significant source of hazardous w... more The remaining reagent from the sample analysis process become a significant source of hazardous waste of laboratory tasting activities. Methylene blue, phenol and oil are pollutants common in the remaining reagent waste. The electrocatalytic reactor is effective oxidation units for these organic pollutants. The reactor was made for a 50 L capacity with cylindrical metal oxide as the anode. The three anode which 6 cm in diameter and 50 cm in length were paired stainless cathode with the distance of 2.5 cm. The reactor was also equipped with a stirrer that is connected to the motor so that the mass transfer and oxidizing agents is more effective. The reactor application was carried out by feeding the remaining reagent waste into the electrocatalytic unit and giving DC potential 5 Volt. Each COD content for reagent waste of detergent: 2864 mg/L, phenol: 838 mg/L and oil: 708 mg/L. The reactor has reduced COD to 2157 mg/L (detergent), 399 mg/L (phenol) and 506 mg/L (oil) for 120 minute...

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

Jurnal Riset Teknologi Pencegahan Pencemaran Industri

Jurnal Riset Teknologi Pencegahan Pencemaran Industri, 2016

Chemical Engineering Journal, 2015

ABSTRACT