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Department of Construction Technology and Engineering

Academic Staff


  • Environmental Impact Assessment
  • Air Pollution and Noise Control
  • Noise and Vibration Control
  • Environment Development Sustainability
  • Environmental Engineering
  • 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


  • Zhihong Wang, C.F. Ng and K.W. Ngai “Ventilated Window Design with Multiple Resonators and Panel Absorbers”. Inter-Noise 2012, August 19-22, New York City, USA (2012)
  • 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)
  • 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, 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, 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, and C.F. Ng “Correlation of Structure-borne Noise and Vibration along Rail Viaduct”, proceeding of Inter-noise (2000).