Challenges in Filtration & Separation – Clean Environment
Professor Chung-Hak Lee
School of Chemical & Biological Engineering, Seoul National University, Korea
Title: Origin and Evolution of Quorum Quenching Technology for Biofouling Control in Membrane Bioreactor for Wastewater Treatment
Professor Lee received PhD from INSA de Toulouse, France in 1980. He was a chairman at Membrane Technology Specialist Group (2010~2013) and now a fellow in International Water Association (IWA). He devoted himself to the development of membrane-based innovative water/wastewater technologies. Particularly, he champions the field of Quorum Quenching that links molecular biology and engineering sciences to control a chronic problem of biofouling in the operation of membrane bioreactor (MBR). Since 2010, the so-called ‘QQ-MBR’ has been propagating worldwide in academic and industrial sectors as well. He received ‘The 4th Membrane Technology Award’ in 2017 by IWA for his outstanding and innovative contribution to membrane biofouling control using quorum sensing.
Biofouling has been conceived as one of the main obstacles in the development of membrane processes for water & wastewater treatments. Many researchers have made efforts to mitigate biofouling in various ways, for example, through the change in membrane material, addition of additives or media, changes in system design or operation mode, etc. However, such physico-chemical or engineering approaches to biofouling problem might not be fundamental solutions. It is because biofouling is an intrinsic natural phenomenon taking place in a ‘complex microbial living community’. In 2008, a revolutionary anti-fouling strategy for the control of membrane biofouling was proposed by applying the quorum quenching (QQ), i.e., stopping chatter or the disruption of quorum sensing (QS) between microorganisms, which regulates their group behaviors including biofilm formation via the secretion of extracellular polymeric substances (EPS). Since then, QQ-Technology for biofouling control has made progress continuously in terms of QQ-Microorganisms (Bacteria or Fungi), QQ-Enzyme (Endo or Exo-enzyme), QS-Signal molecules (AHLs or AI-2) and QQ-Media. In this presentation, behind stories during the evolution of QQ-Technology for biofouling control will be disclosed from its birth to present status.
Dr. Tao Zhang
Director, Gas Turbine Research Institute
Guodian Science and Technology Research Institute, Nanjing, Jiangsu, China
Title: Water endurance test for air filter elements used in the inlet system of gas turbine
The operating environment of rotating machinery including gas turbine and air intake filtration unit is complicated and challenging. Water endurance performance of air filter elements shall be considered besides assessing the performance of initial pressure drop, filtration efficiency and dust-holding capacity, especially the air filter elements are used in high-humidity environments or intake air contains a large quantity of liquid droplets. At present, ISO/NP 29461-7：Water endurance test for air filter elements have been initiated by GUODIAN testing laboratory of China since 2015. The standard would provide a water endurance test method for filter elements and can be used for evaluating performance variation trend of filter elements when encounter water and fog. The current research results of the standard will be shown in the KFS International Conference.
Professor Feng Xin
Air Cleaning Technique Center, China Academy of Building Research
Title: Challenges and efforts against indoor PM contamination in China
Particulate Matter (PM) pollution of the environmental air is now a critical issue in China and other developing countries. This leads to enormous demands on all kinds of air cleaning equipments. Thus a more scientific standardized method on performance evaluation of such instruments should be developed. Gaps between the measurement results based on new published ISO standards and the real PM remove performance and life cycle energy consumption for air cleaners and filters still exist. The IPA conditioning test would limit rather than properly guide the development of the industry. In China, monitoring on indoor/outdoor atmospheric particle number size distribution from 10nm to 10μm under different PM2.5 concentration levels was conducted from 2015 to 2017. Research effort on new challenge aerosol and filter test method was then started. Novel technology and equipment improving the real life performance of charged filer media are developed and applied. All the works would be the first step on the right direction to improve the international standards.
Dr. Khuong Trung Thuy
Deputy CEO, Orient Oil & Gas Joint Stock Company
Hung Phu 2A IP, Can Tho City, Vietnam
Title: New technology filtration and separation systems at the first Sorbitol production plant in Vietnam
Filtration and separation systems play an importance role in the sorbitol plant. Filtration and separation technology in the sorbitol production plant was used to separate liquid/solids phase. In the sorbitol production plant glucose clarification is a combination of two filtration types permitting to remove all the suspended solids/high molecular weight molecules from the products.
The first filtration is done by press filters (frontal filtration) and the second one is done by ceramic membrane (tangential filtration).The press filters treat the product coming from saccharification unit mixed with the retentate from tangential filtration. After being processed through press filters, the syrup is processed through tangential filtration unit. The tangential filtration unit was the first use in the sorbitol plant by ceramic membrane. This module has been recognized by the industry for their quality and robustness for decades. Their optimized design ensures high cleanability and excellent performance in operations.
In the hydrogenation glucose to sorbitol unit, the second filtration process was used to separate catalyst and sorbitol.
Dr. Kyung-Ju Choi
Chair of KFS
Clean & Science Co. Ltd.
Rolling Meadows, IL 60008, USA
Title: Filter Media Design and Dynamic Viscosity Measurement
The multi-layer combination provides a very narrow pore size distribution in a specific pore size range. By utilizing the multi-layer design equations developed for each individual layer of known pore properties, it is possible to design the multi-layer filtration media (micro/ultra) precisely to a tailor pore size distribution. Dynamic viscosity measurement is very important to understand the internal resistance of fluid/gas in shearing motion. Viscosity is from the cohesive forces between the molecules in liquids, and from the molecular collisions in gases.
Taiwan Passal Co., Ltd., Taiwan
Title: Understanding and Application of Solid-Liquid Separation System through the innovation technology of Filter Press
Filter press, which is commonly used as a solid-liquid separator, has a number of problems to be solved so far, including the limits of moisture content control. We are going to study and publish a new concept solid-liquid separation system that goes beyond the limits of traditional filter presses used so far. In this presentation will introduce a new solid-liquid separation system and mechanism, including the control of moisture content that the traditional filterpress has not solved and furthermore the drying process.
Dr. Phule Azit D.
Gyeongsang National University
Jinju 52828, Korea
Title: Performance improvement of V2O5-WO3/TiO2 catalyst supported ceramic sheet filter for the reduction of NOX with NH3
Recently, the intensive interests have been focused on the catalytic filter that can control the particulate and NOX simultaneously owing to it provides a simple and economical process to control the emission gases at moderately high temperature. Babcock & Wilcox reported that the SNRB process has been successfully demonstrated to control the SOX, NOX, and particulate from the coal combustion gas. This process consists of an upstream injecting SOX absorbent and ammonia and the high temperature catalytic bag filter as the down-stream for the selective catalytic reduction (SCR) of NOX. The most important point in this system is to increase the catalytic activity in order to reduce the reaction system.
Professor Suk-Ho Kang,
Title: Filtration technology: Past and future
In the early 195/60s, the literature survey showed that most of the research topics on filtration were referred to wine filtration for clarifying wine. During that period, when slurry filtration experiment has been carried out, the difficulties aroused not in the filter medium made of cloths, but in the slurry tank, where the homogeneous concentration of slurry for feeding was hardly maintained. From 1980s through the present days, the popular topics on filtration have migrated to the dust control by air filtration, because of the increasing demand in the air pollution control and dust contamination control in the semiconductor manufacturing industries. During those periods, several societies were established, for example in the field of powder industries, in the air pollution control, and in the semiconductor manufacturing industries. In the near future, the research trends will be focused on nano-particles, aerosol treatment for various fields of application with mathematical modeling techniques.
Dr. Jong-Kil Kim
AM Nanotech Co. Ltd.
Institute of Engineering and Technology, Hanyang University, Korea
Title: Effect and Optimization on the Separation Method of Nonporous materials in Solid-Liquid Separation Process
Recently, due to the application of nonporous materials and the functionality of nonporous materials, attempts have been made by many scientists to manufacture the final product while retaining the possible nano pore structure. Although the properties of basic nanostructures are determined by the synthetic process of materials, they are also known to be affected by the process of solid-liquid separation and drying. So in this presentation, we're going to show you how nonporous materials are being changed in the solid-liquid separation process after the synthesis of the materials. It also studied the possibility of solid-liquid separation while maintaining nanostructure. In the Solid-liquid separation system, the properties of the final nanoporous materials made through drying were evaluated after solid-liquid separation of the nanoporous silica prepared using several centrifuges, filter press, drum filter, belt press, etc.
Professor Seung Han Woo
Department of Chemical and Biological Engineering, Hanbat National University,
Title: How to consider volume when developing hydrogel based adsorbent: Evaluation of batch and column adsorption with chitosan hydrogel bead for the removal of anionic dye
Chitosan hydrogel capsules (HCs) were formed by anionic surfactant gelation approach and the SDS was extracted by surfactant exchange method. Parameters such as the concentration of chitosan (CS) and SDS that affect the physical properties of the HC was varied and its effect on the adsorption capacity of the HC for Reactive black 5 (RB5) removal in batch and column applications was analyzed. The bulk volume was more correlated to the adsorptive capacity of the HCs. The volume based adsorptive capacity was more effective means of assessing the capacity of the HC compared to the conventional mass-based adsorptive capacity. The column studies showed that, not only did the HC formed with 1.0 wt. % CS (10 g/L SDS) have higher adsorptive capacity (123 mg/g) compared to FS400 (9.43 mg/g), it was also better suited for prolonged column operation. HC may thus be considered as a fitting alternative adsorbent in water treatment.