Water, Waste & Environment

Wastewater Treatment by Membrane Aerated Biofilm Reactor (MABR)
Speaker: Buddhima Siriweera
Registration Fee: 50 US$ / Person
Language: English
Time Length: ~60 Min
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Description: Membrane Aerated Biofilm Reactor (MABR), is a recently developed biofilm technology which provides simultaneous nitrification and denitrification in a single unit. Membrane acts as a carrier to immobilize the bacteria as well as the means of oxygen supply to the bacteria in the biofilm formed on the membrane surface. Due to the air diffusion mechanism used in MABR, it provides higher savings of the energy with compared to the activated sludge process. One of the major hindrances for upgrading MABR is the low total nitrogen removal efficiencies reported at low hydraulic retention times. According to a bench scale MABR study, it is possible to enhance total nitrogen removal from synthetically prepared wastewater via the immobilization of de-nitrifiers in polyvinyl alcohol (PVA) gel bio-carriers. Efforts have been taken for the application of this modification for pilot scale MABR systems in real life applications.

Performance Evaluation of Membrane-Aerated Biofilm Reactor for Acetonitrile Wastewater Treatment
Speaker: Patthranit Kunlasubpreedee
Registration Fee: 50 US$ / Person
Language: English
Time Length: ~60 Min
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Description: The membrane-aerated biofilm reactor (MABR) is considered a promising alternative owing to its obvious advantages. Because of the bubbleless aeration mechanism in the MABR, volatile organic compounds contaminated in the wastewater are retained in the MABR without stripping to the atmosphere. The removal of both organic carbon and nitrogen compounds can be achieved in a single reactor. Because oxygen and the substrate in the MABR are supplied to the biofilm on opposite sides, the aerobic zone for the growth of nitrifiers and anoxic zone for the growth of denitrifiers can occur simultaneously. The MABR can be operated at higher biomass concentration with a more compact plant area in comparison with a conventional activated sludge process. This study provides a better understanding of how the MABR can be employed for a treatment plant where industrial wastewater is required to be treated for xenobiotic compounds with smaller reactor volume without releasing any air pollutants into the atmosphere.

Policy Interventions for the Establishment of a Stormwater-Integrated Dewatering System in Malé City, Maldives
Speaker: Fathmath Shafa-Ath Ibrahim Nasih
Registration Fee: 50 US$ / Person
Language: English
Time Length: ~60 Min
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Description: The high water table of Malé City requires dewatering of construction sites in order to allow for foundation works. Additionally, Malé City is vulnerable to excessive and extended flooding especially during monsoon season. The research aimed to provide long-term solutions to issues in stormwater and dewatering effluent management within Malé City. Results of a hydrologic model of Malé City including existing stormwater management system created using PCSWMM showed 27 points of flooding with magnitudes between 10-40 ML, out of which 16 fell within flood prone areas highlighted in a public survey of 40 samples. The results made clear that an individual system that combines both stormwater and dewatering effluent is applicable for Malé City, agreed on by 87.5% of survey participants. An economic analysis of water supply tariff of Malé City showed a significantly high average cost of 4.04 USD/m3, while Singapore and Hong Kong had average tariff rates 38% and 23% of this value respectively, highlighting need to incorporate cheaper, energy efficient and sustainable water and wastewater management practices. Based on the findings, the research provided holistic policy recommendations to improve the current situation within stormwater and dewatering effluent management works of Malé City as well as plumbing aspects of the overall water and wastewater sector.
Speaker: Assistant Director, Waste Management and Pollution Control Department, Ministry of Environment, Government of the Republic of Maldives

Green Oxidation Processes for Wastewater, Biomass and Industrial Applications
Speaker: Dr. Kun-Lin Yang
Registration Fee: FREE for First 100 Participants
Registration Fee : 50 US$/Person
Language: English
Time Length: ~60 Min
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Description: Hydrogen peroxide (H2O2) is a powerful oxidizer and is considered “green” because it only releases water and oxygen after decomposition. Therefore, hydrogen peroxide becomes increasingly important in wastewater treatments and manufacturing processes. However, reaction rate with H2O2 under ambient conditions is too slow. To accelerate the reaction, ferrous ions can be used as a catalyst to break down H2O2 into hydroxyl free radicals (ˑOH) under a narrow pH range (2.8-3.2). Unlike H2O2, hydroxyl radical react with organic molecules quickly and nonspecifically under ambient conditions. The so-called Fenton’s reaction is widely used for wastewater treatments, but it has many issues such as excessive sludge formation. Recently, we developed a number of enzyme mimetic catalysts which can be used to replace ferrous ions for advanced oxidation processes. The catalysts are metal-oligopeptide complexes, similar to the structure of biological enzymes, but they can be tailored-made and produced in a large scale. The metal center of the catalysts can be oxidized by H2O2 or hypochlorite readily to form high-valence metal species, which then oxidize aromatic or unsaturated compounds with high specificity and molecular efficiency. Under neutral or alkaline pH, they also catalyze the polymerization of aromatic compounds such as phenol. These reactions are highly specific as they do not involve free radical reactions as classic Fenton reactions. They can work at an extremely low concentration even at 0.01 parts-per-million (ppm) level over a wide pH range. Interestingly, the catalysts also show an inverse dosage dependent behavior, i.e. the reaction rate increases with decreasing H2O2 concentration. At present, the novel catalysts have found many industrial applications in wastewater treatment, bleaching edible oil and pretreatment of biomass, due to their unique reaction mechanisms and green nature. Several trials and pilot-scale studies of the above applications will be discussed in the presentation. Due to growing awareness of environmental protection and sustainability, we foresee the numbers of potential applications for the enzyme mimetic catalysts will increase steadily in the near future.
Speaker: Dr Kun-Lin Yang is an associate professor in the Department of Chemical and Biomolecular Engineering at the National University of Singapore (NUS). Before joining NUS, he was a post-doctoral researcher in the Chemical and Biomolecular Department at the University of Wisconsin - Madison. He received his PhD degree from Georgia Institute of Technology in 2002. His present research interests include green catalysts, microfluidics, sensors and wastewater treatments.

PYRO ASIA 2020 (Day 1) - International Symposium on Analytical & Applied Pyrolysis
Speaker:
Registration Fee: 50 US$ / Person
Language: English
Time Length: ~360 Min
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Description: 1. Plenary Lecture: Analytical Pyrolysis for Environmental Microplastic Analysis: Challenges and Solutions (Prof Hajime OHTANI, Professor of Chemistry, Nagoya Institute of Technology, Japan); 2. Keynote Lecture: The effective use of tandem micro reactor on the catalytic conversion of wastes to energy (Prof Young-Min Kim, Department of Environmental Engineering, Daegu University, Korea); 3. Invited Lecture: Rapid evaluation of acido‐basic properties of solid catalysts using automated pulse reactor (Dr Arun Kumar, Senior Manager, Analytical Separation Science and Technology, SABIC Technology Centre, Bangalore); 4. Short Oral Presentation: Application of Py GC/MS to ancient lacquer ware (Dr Noriyasu Niimura, JEOL Ltd, Japan); 5. Short Oral Presentation: Development of Micro-ultraviolet irradiation approach with Pyrolysis–GC/MS for rapid evaluation of photo and thermal degradation of polymers (Dr Sudha Tantry, SABIC Technology Centre, Bangalore, India); 6. Key Lecture: Development of biomass pyrolysis polygeneration and the high value utilization (Prof Haiping Yang, Huazhong University, China); 7. Invited Lecture: Microwave Pyrolysis of Waste Palm Shell to Value-Added Products (Prof Farid Nazir Ani, University Technology Malaysia, Johor, Malaysia); 8. Invited Lecture: Co-pyrolysis of waste biomass and plastics into renewable fuel (Prof K Mohanty, Indian Institute of Technology, Guwahati, India); 9. Invited Lecture: Recent Advancement of Pyrolysis Gas Chromatograph System for Analysis of Microplastics (Dr Atsushi Watanabe, Frontier Laboratories, Koriyama, Japan); 10. Methodology for using chloride molten salts in a tandem micro reactor during pyrolysis of lignocellulosic biomass (Adriana Estrada); 11. Evaluation of Pyrolysis Behavior, Pyrolysis Kinetics and Product Analysis of Thermal Protection System (TPS) Materials (Bhurada Shravani); 12. Pyrolysis of Salicornia bigelovii: product characterization and apparent kinetic analysis (Jinan Aljaziri); 13. Product Presentation by JEOL (GCMS) (Mr Jun Tamura); 14. Panel Discussion: Analytical Pyrolysis: Challenges and Future Directions ( Prof Shogo Kumagai- Moderator, Prof. Hajime OHTANI, Dr Atsushi Watanabe, Prof. Young-Min Lim, Dr Miao Wang)

PYRO ASIA 2020 (Day 2) - International Symposium on Analytical & Applied Pyrolysis
Speaker:
Registration Fee: 50 US$ / Person
Language: English
Time Length: ~360 Min
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Description: Please see detailed technical program at www.pyroasia.org.

PYRO ASIA 2020 (Day 3) - International Symposium on Analytical & Applied Pyrolysis
Speaker:
Registration Fee: 50 US$ / Person
Language: English
Time Length: ~360 Min
To Register: Registration Form
[More]
Description: Please see detailed technical program at www.pyroasia.org.