Jaewook Myung

Jaewook Myung
Korea Advanced Institute of Science and Technology | KAIST · Department of Civil and Environmental Engineering

Doctor of Philosophy

About

20
Publications
3,955
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450
Citations

Publications

Publications (20)
Article
The Coupled Aerobic-anoxic Nitrous Decomposition Operation (CANDO) is a new process for wastewater treatment that removes nitrogen from wastewater and recovers energy from the nitrogen in three steps: (1) NH4+ oxidation to NO2-, (2) NO2- reduction to N2O, and (3) N2O conversion to N2 with energy production. Here we demonstrate that Type II methanot...
Article
Obligate methanotrophs capable of producing polyhydroxyalkanoates (PHAs), a sustainable alternative to non-biodegradable petroleum-based plastics, under nutrient-limited conditions are currently limited to synthesis of poly(3-hydroxybutyrate) (P3HB). Diversifying monomers would greatly expand the range of applications. Here we report the first pure...
Article
Wastewater treatment plants (WWTPs) have long been recognized as point sources of N2O, a potent greenhouse gas and ozone-depleting agent. Multiple mechanisms, both biotic and abiotic, have been suggested to be responsible for N2O production from WWTPs, with basis on extrapolation from laboratory results and statistical analyses of metadata collecte...
Article
Full-text available
In the wake of plastic pollution increasing around the world, biodegradable plastics are one of the fastest-growing segments within the global plastics market. The biodegradation of these plastics depends on diverse factors including, but not limited to, the physicochemical structure of the materials, environmental conditions, and the microbial pop...
Article
Full-text available
Thermoplastic blends are applied for three-dimensional (3D) printing to obtain improved functionality. While thermal, chemical, and mechanical properties of 3D-printed blends are typically examined, biodegradability of the 3D-printed plastics has rarely been the focus of research. In this study, we evaluated the biodegradation behavior of 3D-printe...
Raw Data
Appendix A. Supplementary data The following is the Supplementary data to this article: Calculations and figures showing the correction for the ohmic drop in abiotic and biotic tests, one figure showing the impact of the separator and the air flow at the bottom of the air chamber on the electrochemical performance of the cathode. Four figures show...
Article
To scale up microbial fuel cells (MFCs), larger cathodes need to be developed that can use air directly, rather than dissolved oxygen, and have good electrochemical performance. A new type of cathode was examined here that uses a “window-pane” approach with fifteen smaller cathodes welded to a single conductive metal sheet to maintain good electric...
Article
Methane is an abundant and inexpensive feedstock that is available as natural gas and renewable biogas. However, methane has not been regarded as a good substrate for microbial fuel cells (MFCs) due to low power densities. To increase power, a two-step strategy was used based on conversion of methane into methanol, followed by electricity generatio...
Preprint
Full-text available
Under conditions of nutrient-limited growth, Type II obligate methanotrophs oxidize C 1 compounds, such as methane or methanol and accumulate intracellular granules of poly(3-hydroxybutyrate) (P3HB). Here, we report that, under same nutrient-limited conditions, the Type II obligate methanotroph Methylocystis parvus OBBP can use ethane as its sole c...
Article
Long-term operation of wastewater-fed, microbial fuel cells (MFCs) with cathodes made of activated carbon and stainless steel (SS) current collectors can result in decreased performance due to cathode fouling. Copper has good antimicrobial properties, and it is more electrically conductive than SS. To demonstrate that a copper current collector cou...
Article
Full-text available
The first methanotrophic syntheses of polyhydroxyalkanoates (PHAs) that contain repeating units beyond 3-hydroxybutyrate and 3-hydroxyvalerate are reported. New PHAs synthesized by methanotrophs include poly(3-hydroxybutyrate-co-4-hydroxybutyrate) (P(3HB-co-4HB)), poly(3-hydroxybutyrate-co-5-hydroxyvalerate-co-3-hydroxyvalerate) (P(3HB-co-5HV-co-3H...
Article
The synthesis of polyhydroxyalkanoates (PHAs) utilizing methane and alkenoates derived from recycled PHAs is reported. Medium-chain length (C6 – C9) and short-chain length (C4 – C5) polyhydroxyalkanoates were catalytically pyrolyzed to generate a range of 2-alkenoates. The microbial copolymerization of the recovered alkenoates with methane in the p...
Article
Methane is a low-cost feedstock for the production of polyhydroxyalkanoate biopolymers, but methanotroph fermentations are limited by the low solubility of methane in water. To enhance mass transfer of methane to water, vigorous mixing or agitation is typically used, which inevitably increases power demand and operational costs. This work presents...
Article
Methane (CH4) is a readily available feedstock for production of polyhydroxyalkanoates (PHAs). The structure and PHA production capacity of a Methylocystis-dominated methanotrophic enrichment was stable in long-term operation (>175days) when grown exponentially under non-aseptic conditions in fill-and-draw batch cultures with ammonium as nitrogen s...
Conference Paper
Many synthetic plastics are recycled through thermal processes that lead to their downcycling to lower level applications. Microbial reassembly of monomers could potentially enable recycling without downcycling poly-3-hydroxybutyrate (PHB), a bioplastic that is functionally similar to many synthetic plastics, is readily depolymerized to hydroxybuty...
Conference Paper
Many bacteria synthesize intracellular PHB granules, which can further be processed to produce biodegradable plastics, under nutrient-limiting conditions. Although many studies have explored various factors that influence the performance of PHB-accumulating bioreactors, there is limited information on how availability of phosphorus impacts these bi...
Conference Paper
Many synthetic plastics are recycled through thermal processes that lead to their downcycling to lower level applications. Microbial reassembly of monomers could potentially enable recycling without downcycling. PHB, a bioplastic that is functionally similar to many synthetic plastics, is readily depolymerized to hydroxybutyrate (3HB). In this work...

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