OH Kai Siang
Assistant Professor Dr.
SDGs Focus
About Me
Ir. Dr. Oh Kai Siang is an Assistant Professor at the School of Energy and Chemical Engineering, Xiamen University Malaysia. He is a Chartered Engineer (CEng, IChemE, UK) and Professional Engineer (PE, BEM, Malaysia). He received his Bachelor degree and Ph.D. in Chemical Engineering from Monash University Malaysia. Dr. Oh’s research focuses on sustainable water and wastewater treatment, membrane technology, biopolymers, and process engineering. His expertise covers various innovative solutions, including decentralized sewage treatment vessels (DSTV), polyelectrolyte chitosan–alginate membranes for greywater filtration, anaerobic digestion packing, sustainable urban drainage system (SuDS).
PhD (Chemical Engineering), School of Engineering, Monash University Malaysia, Malaysia (2017)
BEng (Chemical Engineering), Monash University Malaysia (2012)
BEM Professional Engineer (Ir.)
IChemE Chartered Engineer (CEng)
Editor of IOP Journal of Physics: Conference Series (JPCS) for 15th EURECA Conference
Research Interest
Dr. Oh’s research focuses on advancing sustainable water and wastewater treatment through the integration of various technologies and process engineering. He explores a wide spectrum of innovative solutions to address water challenges. His expertise includes the development of decentralized sewage treatment vessels (DSTVs) for adaptable on-site treatment, the design of polyelectrolyte chitosan–alginate membranes for efficient greywater filtration, and the application of biological treatment systems to enhance pollutant removal. In addition, he investigated sustainable urban drainage systems (SuDS) to improve climate resilience and urban water management. His work contributes to building practical, scalable, and environmentally responsible water treatment strategies.
Research Project(s)
Current Courses Taught
BSC 112 Engineering Mathematics I
CME330 Chemical Engineering Laboratory III
Local Grant(s)
Development of chitosan/alginate membrane module for decentralized greywater recycling system, 2017 – 2020, Principal Investigator, Taylor’s Research Grant (ERFS)
International Grant(s)
Effect of sewage physicochemical properties and quantity on the treatment performance of a decentralized modular sewage treatment vessel (DMSTV) for rural community, 2022 – 2023, Kurita Water and Research Foundation (KWEF)
Journal
Kai Siang Oh, Phaik Eong Poh*, Meng Nan Chong, Eng Seng Chan, Ee Von Lau, Christopher Saint (2016) Bathroom Greywater Recycling using Polyelectrolyte-Complex Bilayer Membrane: Advanced study of membrane structure and treatment efficiency. Carbohydrate Polymers
Kai Siang Oh, Phaik Eong Poh*, Meng Nan Chong, Darwin Gouwanda, Weng Hoong Lam (2015) Optimizing the In-line Ozone Injection and Delivery Strategy in a Multistage Pilot- Scale Greywater Treatment System: System validation and cost-benefit analysis. Journal of Environmental Chemical Engineering
Janet Leong, Kai Siang Oh, Poh Phaik Eong, Meng Nan Chong* (2017) Prospects of hybrid rainwater-greywater decentralised system for water recycling and reuse: A review. Journal of Cleaner Production
Kai Siang Oh, Janet Yip Cheng Leong, Phaik Eong Poh*, Meng Nan Chong, Ee Von Lau (2018) A review of greywater recycling related issues: Challenges and future prospects in Malaysia, Journal of Cleaner Production, Volume 171, Pages 17-29, ISSN 0959-6526, https://doi.org/10.1016/j.jclepro.2017.09.267.
Chua Guan Xuan, Kai Siang Oh*, Li Wan Yoon, Lee Hong Tee (2020) Lake Water Treatment Using Green Wall System: Effects of Filter Media Ratio and Lake Water Flow Rate on Treatment Performance, Water Conservation Science and Engineering 5(3-4), doi:10.1007/s41101-020-00091-9
Sathishkumar Nalatambi, Kai Siang Oh*, Li Wan Yoon, Lee Hong Tee (2023), Evaluation of antibacterial property and greywater treatment performance using composite chitosan/graphene oxide membrane, Materials Chemistry and Physics, Volume 295, 2023, ISSN 0254-0584, https://doi.org/10.1016/j.matchemphys.2022.127160
Febriana, R., Hor, L. J., Zahidi, I*., & Oh K.S . (2025). Designing climate-resilient sustainable drainage system (SuDS) for mass rapid transit (MRT) development: A hydrodynamic modelling approach. Journal of Hydrology, 648, 132366. https://doi.org/https://doi.org/10.1016/j.jhydrol.2024.132366
Xiaoqin Meng, Sathishkumar Nalatambi, Adityanindran Mahaindran, Lee Hong Tee, Bee Lin Chua, Kai Siang Oh, Weng Hoong Lam. Characterization of choline chloride-based deep eutectic solvent for anthocyanin extraction via aqueous two-phase system: Physicochemical properties and liquid–liquid equilibrium phase diagram (2023). Asia-Pac J Chem Eng. 2023; 18(6):e2990. doi:10.1002/apj.2990
Chan, N.Y.X., Tee, L. H.*, Oh, K.S., Lam, W.H., Yoon, L.W., Phang, E.S.W. (2023), The effects of different plant species in greenwall filtration system on lakewater treatment, Journal of Physics: Conference Series, 2523 (2023) 012013
Conference
Nadia Falihah Ahmad Yani, Nurhazwani Ismail* and Kai Siang Oh (2019) Potential of using Hibiscus Sabdariffa in treating greywater, AIP Conference Proceedings 2137, 020017 (2019); https://doi.org/10.1063/1.5120993
Guo Zheng Benjamin Woon, Kai Siang Oh and Lee Hong Tee* (2020) Identification and optimization of anthocyanin extracted from Dacryodes rostrata peel, AIP Conference Proceedings 2233, 040007, https://doi.org/10.1063/5.0001923
Priya B Satheesh, Kai Siang Oh* and Lee Hong Tee (2021) Life Cycle Assessment of Various Filtering Media for Greywater Treatment Using Greenwall Filtration System, MATEC Web Conf., Volume 335, https://doi.org/10.1051/matecconf/202133501001
Sathishkumar Nalatambi, Kai Siang Oh*, Li Wan Yoon (2021), Fabrication technique of composite chitosan/alginate membrane module for greywater treatment, Journal of Physics: Conference Series Vol. 2120, 012037
Mahaindran, A., Meng, X., Tee, L. H.*, Chua, B.L., Oh, K.S. (2023), A new green solvent: Synthesis and Characterization of Natural-Deep-Eutectic-Solvent (NADES) for application Aqueous-Two-Phase system (ATPS) for extraction of anthocyanin, The 11th Asia Conference on Mechanical and Material Engineering, Sapporo, Japan, June 8-11, 2023
Completed Supervision
Sathishkumar A/L Nalatambi, Master of Science in Engineering
Development of Composite Chitosan/Alginate/Graphene
Oxide Membrane for Greywater Recycling
2021 – 2023
Taylor’s University
Rosidha Febriana Tjoe, Doctor of Philosophy in Engineering
Climate-Adapted Drainage Design for Mass Rapid Transit
(MRT) Development: Mitigating Urban Flooding and Sedimentation
2022 -2025
Taylor’s University
Sustainable Development Goals International Innovation Awards (OUTSTANDING innovation award medalists), Universiti Teknikal Malaysia Melaka (UTEM), 2021
Sustainable Development Goals International Innovation Awards (Gold Medalist), Universiti Teknikal Malaysia Melaka (UTEM), 2021
Sustainable Development Goals International Innovation Awards, Universiti Teknika l Malaysia Melaka (UTEM) (Silver Medalist), 2021
International Conference and Exhibitions on Inventions (PECIPTA 2017) (Bronze), Ministry of Higher Education, 2017
Patent
Poh, P.E., Oh, K.S., Chong, M.N. TEEIP:2016/UI/P2.18/OP: "A System for Treatment of Greywater”, Application number: UI 2016703927. (Application filed in Intellectual Property Corporation of Malaysia on 26 October 2016, Date of Grant: 23 September 2020)