A5050164921- Biofuel production and bioconversion
- Anaerobic Digestion and Biogas Production
- Microbial Fuel Cells and Bioremediation
- Microbial Metabolic Engineering and Bioproduction
- Wastewater Treatment and Nitrogen Removal
- Methane Hydrates and Related Phenomena
- Nanoparticles: synthesis and applications
- Microbial Community Ecology and Physiology
- Advanced Nanomaterials in Catalysis
- Electrochemical sensors and biosensors
- CO2 Reduction Techniques and Catalysts
- Microbial metabolism and enzyme function
- Graphene and Nanomaterials Applications
- Biochemical and biochemical processes
- Catalysis for Biomass Conversion
- Supercapacitor Materials and Fabrication
- Enzyme Catalysis and Immobilization
- Microplastics and Plastic Pollution
- Advanced Cellulose Research Studies
- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Diatoms and Algae Research
- Algal biology and biofuel production
- Microbial Metabolism and Applications
- Hybrid Renewable Energy Systems
SK Group (South Korea)
2023-2024
Anyang University
2016-2024
Hanyang University
2015-2024
Korea Institute of Science and Technology
2011-2015
University of Missouri
2008-2010
The intrinsic slow growth of nitrifying bacteria and their high sensitivity to environmental perturbations often result in cell inhibition by toxicants. Nanoparticles are great concern the environment because small size catalytic properties. This work sought determine size-dependent Ag nanoparticles evaluate relationship between reactive oxygen species (ROS). with an average range 9−21 nm were synthesized varying molar ratios BH4− /Ag+in solution. resulting ROS generation was quantified...
Although microbes directly accepting electrons from a cathode have been applied for CO2 reduction to produce multicarbon-compounds, high electron demand and low product concentration are critical limitations. Alternatively, the utilization of as co-reducing power during fermentation has attempted, but there must be exogenous mediators due lack an electroactive heterotroph. Here, we show that Clostridium pasteurianum DSM 525 simultaneously utilizes both substrate donors through direct...
Electron mediators and electron supply through a cathode were examined to enhance the reducing power for butyrate production by an acidogenic clostridium strain, Clostridium tyrobutyricum BAS 7. Among tested mediators, methyl viologen (MV)-amended cultures showed increase of productivity (1.3 times), final concentration (1.4 yield times). The flow altered MV addition from ferredoxin pool NADH was shown one model, implying that more available increased production. In compartment poised at...
Nitrification inhibition by silver nanoparticles (nanosilver) was evaluated extant respirometry using enriched nitrifying bacteria isolated from wastewater treatment plants. Silver were more toxic than ions or chloride colloids, all of which did not disrupt cell membrane integrity at 1 mg/L Ag. The toxicity reduced in the presence various anions, especially sulfide. results suggest that have same behaviour surface complexation as ions, and nanosilver may be removed reaction with soluble...
Nitrifying bacteria, cyanobacteria, and algae are important microorganisms in open pond wastewater treatment systems. Nitrification involving the sequential oxidation of ammonia to nitrite nitrate, mainly due autotrophic nitrifying is essential biological nitrogen removal global cycling. A continuous flow bioreactor was initially designed for bacterial growth only. In presence cyanobacteria algae, we monitored both microbial activity by measuring specific oxygen production rate (SOPR)...
C5-C8 medium-chain carboxylic acids are valuable chemicals as the precursors of various and transport fuels. However, only a few strict anaerobes have been discovered to produce them their production is limited low concentrations because product toxicity. Therefore, bacterial strain capable producing high-titer was strategically isolated characterized for medium chain length acids.Hexanoic acid-producing were from inner surface cattle rumen sample. One isolates, displaying highest hexanoic...
The toxicity of several metallic/oxide nanoparticles (TiO2, CuO, ZnO, and Ag) to nitrifying bacteria was evaluated individually or in combination batch studies. Except for the mixture ZnO Ag, inhibition roughly sum individual among studied. Although there no inhibitory effect TiO2 under ambient light dark conditions, nitrification significantly increased when were exposed ultraviolet (UV) 30 min. Under UV exposure, both (anatase) bulk amorphous generated same amount reactive oxygen species...
Hydrogenotrophic methanogens can use gaseous substrates, such as H2 and CO2, in CH4 production. gas is used to reduce CO2. We have successfully operated a hollow-fiber membrane biofilm reactor (Hf-MBfR) for stable continuous production from CO2 H2. were diffused into the culture medium through without bubble formation Hf-MBfR, which was at pH 4.5–5.5 over 70 days. Focusing on presence of hydrogenotrophic methanogens, we analyzed structure microbial community reactor. Denaturing gradient gel...
Extractive fermentation with the removal of carboxylic acid requires low pH conditions because acids are better partitioned into solvent phase at values. However, this requirement conflicts optimal near-neutral for microbial growth. CO2 pressurization was used, instead addition chemicals, to decrease extraction butyric acid, a product Clostridium tyrobutyricum, and butyl butyrate selected as an extractant. (50 bar) improved efficiency from solution 6, yielding distribution coefficient (D)...