A5031732918- Carbon Nanotubes in Composites
- Wastewater Treatment and Nitrogen Removal
- Graphene research and applications
- Fiber-reinforced polymer composites
- Advanced Sensor and Energy Harvesting Materials
- Mechanical Behavior of Composites
- Water Quality Monitoring and Analysis
- Conducting polymers and applications
- Ammonia Synthesis and Nitrogen Reduction
- Textile materials and evaluations
- Water Quality Monitoring Technologies
- Membrane-based Ion Separation Techniques
- Membrane Separation Technologies
- Material Properties and Processing
- Adhesion, Friction, and Surface Interactions
- Muscle activation and electromyography studies
Pusan National University
2004-2024
The information on the incoming load to wastewater treatment plants is not often available apply modelling for evaluating effect of control actions a full-scale plant. In this paper, time series model was developed forecast flow rate, COD, NH+4-N and PO3-4-P in influent by using 250 days data field plant operation data. 150 100 were used development validation, respectively. missing interpolated spline method model. Three different methods proposed development: one one-step seven-step ahead...
A full-cyclic automatic control strategy for sequencing batch reactors (SBR) was proposed using only common sensors such as ORP, DO and pH. The main objective to develop a generally applicable robust strategy. To accomplish this, various schemes found in the literature or suggested by authors were examined at diverse ammonia loads SCOD/NH4+-N ratios. Advantages constraints of each scheme discussed compared. Ammonia load estimated with lag time during aerobic stage, then influent pump...
Treatment of swine wastewater containing strong nitrogen was attempted in a full-scale SBR. The strongest discharged from slurry-type barn and called swine-slurry (SSW). Slightly weaker produced scraper-type swine-urine (SUW). TCOD, NH4+-N TSS raw SSW were 23,000-72,000 mg/L, 3,500-6,000 mg/L 17,000-50,000 respectively. A whole cycle SBR consists 4 sub-cycles with anoxic period 1 hr aerobic 3 hr. maximum loading rates both digested-SSW SUW similar to 0.22 kg NH4+-N/m3/day whereas the up 0.35...
Surfactant-based wet spinning is a promising route toward the eco-friendly production of carbon nanotube fibers (CNTFs). However, currently, properties surfactant-based wet-spun CNTFs lag behind those produced by other methods, indicating need for further understanding and research. Here, we explored surface characteristics nanotubes (CNTs) that are advantageous spinning, using sodium cholate as surfactant. Our finding indicates appropriate thermal oxidation CNTs enhances fiber properties,...
Effective method for feeding an external carbon source (ECS) in SBR was investigated to enhance denitrification based on modifying the anoxic/aerobic sub-cycle swine wastewater treatment. The discharged from scraper-type barns contains relatively low readily biodegradable organic. Therefore NOx-N accumulated during repeating operation. When acetic acid fed as ECS final sub-cycle, maximum nitrogen removal rate 0.22 kg N/m3/d. This due both less period and inhibition of by pH drop cycle....
We analyzed the dispersion state of carbon nanotubes (CNTs) in m-cresol using stability analysis, optical microscopy, and UV-vis spectroscopy. The high CNT/m-cresol was observed when it sufficiently treated with ultrasonication. Despite stability, microscopy spectroscopy analysis various dispersions revealed that CNT bundles were not dispersed into individual CNTs. also propose blue-shift G peak CNTs Raman spectrum, which had been reported as evidence formation charge-transfer complex...
We have developed a carbon nanotube (CNT) pad to replace black, which is essential for electric muscle stimulation (EMS) suits that can provide efficient exercise effects in short time. The optimized CNT had 10 times lower concentration but showed 20 resistance than the black pad. In case of peak voltage indicating EMS performance, it was confirmed (4.0 wt%) 25.9 V and (40 6.5 V, about 4 better. added increased from 4.0 wt% 10.0 wt%, 26.8 output not significantly improved compared amount...
The SBR(Sequencing Batch Reactor) process is ideally suited to treat high loading wastewater due its dilution rate. SBR operates by a cycle of periods consisting filling, reacting, settling, decanting and idling. react phases such as aeration or non-aeration, organic oxidation, nitrification, denitrification other bio-logical reactions can be achieved in reactor. Although the whole with time distributing, it hard manage normal condition without recognizing present state. state observed...
For the commercialization of macroscopic fibers carbon nanotubes (CNTs), it is important to achieve solution processing using inexpensive commercial multi-walled (MWCNTs). However, so far, CNTs has been limited single-walled (SWCNTs). Here, we report wet spinning MWCNT a high-concentration MWCNT/surfactant dispersion in water for first time. We established phase diagram by varying mass ratio surfactants and MWCNTs. The successfully accounts behavior based on balance between depletion-induced...