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  • Environmental Impact Assessment 

  • Acoustics Engineering 

  • Building Sustainability and Green Building Assessment 

  • Building Energy Efficiency cum Carbon Emission 

  • Air Pollution and Noise Control 

  • Noise and Vibration Control 

  • Environmental Engineering 

  • Advanced Engineering Mathematics 

  • Numerical Methods for Analysis 

  • Calculus 


2004 PhD in Environmental Engineering, The Hong Kong Polytechnic University
1999 BEng(Hons) in Environmental Engineering, The Hong Kong Polytechnic University


2017 - Present Faculty of Science and Technology, the Technological and Higher Education Institute of Hong Kong
2007 - 2015 Department of Civil Engineering, Chu Hai College of Higher Education
2005 - 2007 Acoustics and Air Testing Laboratory Company Limited
2004 - 2005 Antonio Precise Products Manufactory Limited
2003 - 2004 Hong Kong Institute of Vocational Education (Shatin)


2011 - present HOKLAS Technical Expert
2010 - 2012 Committee Member, Community & Construction Professionals' Development Centre (CCPDC)


  • Experimental Investigation into the effect of Gurney flaps on the aerodynamic and acoustic performance of micro air vehicle rotor blade. THEi-Seed Grant 2020-2021 (HKD 80,000) Co-investigator: Edith Ngai
  • A study on the traffic-related contamination of water gathering grounds and its impact on the impounding reservoirs in Hong Kong. THEi-Seed Grant 2019-2020 (HKD 79,900) Principal Investigator: Edith Ngai
  • Development of a high-efficiency and low-cost UV-LED/chlorine process for removal of antibiotic resistant bacteria and their resistance genes in municipal wastewater disinfection. (RGC/FDS) 2017-2020 (HKD 815,485) Principal Investigator: Edith Ngai


  • Municipal wastewater disinfection
  • Noise and Vibration Study
  • Heavy metal study
  • Indoor Air Quality


  • KW Ngai, MW Mak, HS Ko and KL Pun “Seasonal Variation of Heavy Metal Contents in Road Dust from Residential, Industrial and Rural Areas of Hong Kong” HKIE Transactions. Volume 29, Number 3, pp. 191 199 (2022). 

  • Oriana Jovanovic, Carlos F. Amabile Cuevas, Chii Shang, Chao Wang and King Wah Ngai “What Water Professionals Should Know about Antibiotics and Antibiotic Resistance: An Overview” ACS ES&T Water. 1(6), 1334 1351 (2021). 

  • KW Ngai, MW Mak and KL Pun “Assessment of the Potential Environmental and Ecological Risks Associated with Traffic Induced Heavy Metal Contamination in Country Parks of Hon g Kong” IOP Conference Series: Earth and Environmental Science, volume 858, The 7th International Conference on Agricultural and Biological Sciences (2021). 

  • K.W. Ngai and C.F. Ng “Correlation of Structure-borne Noise and Vibration along Rail Viaduct”, proceeding of Inter-noise (2000). 

  • K.W. Ngai, C.F. Ng, W.Y. Poon and Y.Y. Lee “Structure-borne Noise and Vibration along Rail Viaduct in Hong Kong” International Conference on Construction, pp.126-139, July (2001). 

  • K.W. Ngai, C.F. Ng and Y.Y. Lee “Noise and Vibration Spectrum of Structure-borne of Rail Viaduct” The 2nd International Conference on Structural Stability and Dynamics (2002). 

  • K.W. Ngai, C.F. Ng and Y.Y. Lee “Noise and Vibration Spectrum of Structure-borne Noise from Railway System”. The Hong Kong Institution of Engineers Transactions, 9(2), pp. 12-17 (2002). 

  • K.W. Ngai and C.F. Ng “Structure-borne Noise and Vibration of Concrete Box Structure and Rail Viaduct”. Journal of Sound and Vibration, 255(2), pp. 281-297 (2002) 

  • Zhihong Wang, C.F. Ng and Edith Ngai “Ventilated Window Design with Multiple Resonators and Panel Absorbers”. Inter-Noise 2012, August 19-22, New York City, USA (2012)