In present study, an electric field was newly adopted as a pretreatment method for inoculum prepa... more In present study, an electric field was newly adopted as a pretreatment method for inoculum preparation in dark fermentative hydrogen production. Various voltages (5-20 V for 10 min) were applied, and the feasibility and efficiency of this method were compared with those of heat pretreatment (90°C for 20 min). Both the highest H2 yield, 1.43 mol H2/mol hexoseadded, and the highest production rate, 101.4 mL H2/L/h, were observed at 10 V. While RNA concentration of above 100mg/L was maintained up to 10 V, it was decreased at an applied voltage of 20 V, where the worst performance was observed. Microbial analysis results confirmed that only H2 producing bacteria were detected with electric pretreatment, while non-H2 producing bacteria coexist with heat and electric (5 V) pretreatment. The results suggested that application of an electric field has reasonable potential as an alternative method for preparing inoculums for hydrogen production.
Journal of Korean Society of Environmental Engineers, 2013
In this study, the performance and microbial community of anaerobic digestion fed by food waste l... more In this study, the performance and microbial community of anaerobic digestion fed by food waste leachate at low organic loading rate were investigated with and without internal pH control. Experimental results show that similar biogas yield was achieved in both reactors regardless of increase in pH, the concentrations of free ammonia and volatile fatty acids in case of without internal pH controlled one. The results of a methanogenic community analysis by Polymerase Chain Reaction and Denaturing Gradient Gel Electrophoresis revealed that the apparent preponderance of Methanosarcina sp. could be one of reasons for the maintenance of reactor stability.
In present study, an electric field was newly adopted as a pretreatment method for inoculum prepa... more In present study, an electric field was newly adopted as a pretreatment method for inoculum preparation in dark fermentative hydrogen production. Various voltages (5-20 V for 10 min) were applied, and the feasibility and efficiency of this method were compared with those of heat pretreatment (90°C for 20 min). Both the highest H2 yield, 1.43 mol H2/mol hexoseadded, and the highest production rate, 101.4 mL H2/L/h, were observed at 10 V. While RNA concentration of above 100mg/L was maintained up to 10 V, it was decreased at an applied voltage of 20 V, where the worst performance was observed. Microbial analysis results confirmed that only H2 producing bacteria were detected with electric pretreatment, while non-H2 producing bacteria coexist with heat and electric (5 V) pretreatment. The results suggested that application of an electric field has reasonable potential as an alternative method for preparing inoculums for hydrogen production.
Journal of Korean Society of Environmental Engineers, 2013
In this study, the performance and microbial community of anaerobic digestion fed by food waste l... more In this study, the performance and microbial community of anaerobic digestion fed by food waste leachate at low organic loading rate were investigated with and without internal pH control. Experimental results show that similar biogas yield was achieved in both reactors regardless of increase in pH, the concentrations of free ammonia and volatile fatty acids in case of without internal pH controlled one. The results of a methanogenic community analysis by Polymerase Chain Reaction and Denaturing Gradient Gel Electrophoresis revealed that the apparent preponderance of Methanosarcina sp. could be one of reasons for the maintenance of reactor stability.
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Papers by Da-Young Jeong