A5101454313- Membrane Separation Technologies
- Wastewater Treatment and Reuse
- Membrane-based Ion Separation Techniques
- Water Treatment and Disinfection
- Constructed Wetlands for Wastewater Treatment
- Phosphorus and nutrient management
- Wastewater Treatment and Nitrogen Removal
- Environmental Chemistry and Analysis
- Urban Stormwater Management Solutions
- Parasitic Infections and Diagnostics
- Extraction and Separation Processes
- Child Nutrition and Water Access
Yonsei University
2004-2024
University of Seoul
2006
Abstract Various types of gravity-driven membrane (GDM) systems have been developed to solve household water treatment problems. A free-end (E-GDM) system was mitigate the deposition cake on more effectively than other commercialized GDM systems. The E-GDM manually operated with permeability 12.94 and 1.75 L/m2/h/kPa for a kaolin suspension wastewater plant influent sample, respectively, showing highest average flow rate among all tested in this study met daily minimum requirement...
In Korea, the current water resources will fall short by 2.6 billion tons to meet 38 ton demand in year 2020. To overcome future shortage, it is desirable minimize consumption and reuse treated wastewater. There are a total of 99 on-site water-recycling systems country. The potential capacity 429 thousands tons/day, which 3.6% service water. Compared other industrialized countries, number recycling Korea extremely small. This mainly due following reasons. First, any building with more than...
This study monitored changes in the level of heterotrophic bacteria filtrate and investigated effect stagnant water on it, using a batch-operated, gravity-driven membrane system for household treatment. The filtration test was carried out presence absence line. results showed that accelerated levels, measured by plate count, even though count finally increased up to 105 CFU/mL regardless water. When change batch over time, rapidly decreased within 5 min each filtration. Biofilm formation...
Abstract Manual cleaning protocols were developed for a gravity‐driven membrane (GDM) module. Such module is promising solution household water treatment in low‐ and middle‐income countries. A filtration system equipped with the GDM was tested batchwise manner using three different feed solutions. Two types of manual performed to delay permeability decrease, namely between batches long‐term (every 15 batches). The optimized protocol consisted 3 twisting 10 vertical shaking movements; 70...
Abstract Membrane filtration process has been developed to overcome the weakness of conventional water treatment for removal particulates and some pathogens such as cryptosporidium giardia. Although suspended particulate, including bacteria, can be effectively removed by membrane, trace organics soluble matters are hard remove. To this limitation, membrane is required associated with other technologies adsorption oxidation. PAC retrofitting (PMR) one new processes removing not only...
Appropriate cleaning methods are essential to ensure the continuous use of membranes, however, research on suitable for Gravity-driven membrane (GDMs) remains insufficient. To remove contaminants accumulated surface GDM modules, open slot and non-slot modules were designed manufactured. These compared their filtration performance contaminant removal efficiency through computational fluid dynamics simulations experiments using influent from wastewater treatment plants (WWTP). While flow...
ABSTRACT Recently, global climate change has led to more frequent droughts and torrential rains. It could be reason of unexpected bad effects for water treatment such as taste odor problems decreasing removal efficiencies. In case membrane process, the inflow high turbid raw due heavy rains may bring sudden increase in fouling caused by thick dense cake formation on surface. Therefore, preparing proper operation methods is necessary preventing system shutdown fouling, when turbidity...
The characterization of particle behavior in addition to the measurement turbidity is becoming more important performance evaluation as well operation water treatment system, order provide supporting information on small-sized microorganisms such Cryptosporidium. Accordingly, counter has been introduced and system. However, research results relation among turbidity, counts and/or protozoa have not concurrent with each other. Therefore, this study investigated improve sand filter so that risk...
Treatment of piggery wastewater by MBR with acidogenic fermentationIn general, has some trouble in conventional biological treatment because it includes high concentrations nitrogen and organics. It is difficult to maintain the constant effluent quality activated sludge process, since fraction organic solids non-biodegradable organics are high. Additionally, nitrification was frequently inhibited concentration of...Author(s)J.-H. ShinS.-M. LeeY.-C. ChungS.-H. NohSourceProceedings Water...