Prof X.Y. Li

Professor (Water and Environmental Engineering)

Professor X. Y. LI

BSc (Eng), Tsinghua University, Beijing, China
MS (Eng), Tsinghua Unviersity, Beijing, China
PhD, the University of Arizona, Tucson, U.S.A.

Office: HW 6-01
Phone: +852 28592659
Fax: +852 25595337


Teaching Activities

  •   CIVL2001 Engineering Design and Communication
  •   CIVL3011 Municipal and Industrial Wastewater Treatment
  •   CIVL3021 Water Resources Engineering
  •   CIVL6034 Municipal Wastewater Treatment
  •   CIVL6051 Water Quality Modelling


Research Interests

  •   Particle phenomena: coagulation
  •   Sedimentation and pollutant-sediment interactions
  •   Advanced Oxidation Processes (AOP) in water and wastewater treatment and disinfection
  •   Membrane technology in water and wastewater treatment


Representative Research / Consultancy Projects

  •   Coagulation of screened sewage particulates from marine outfall discharges
  •   Electrochemical disinfection of saline sewage effluent: mechanisms and pilot study
  •   Nutrient transformation during the decay of settled algae in the ephemeral sediment after algal blooms
  •   Sludge granulation in biological wastewater treatment: technology, mechanisms and characterization
  •   Characterisation of wastewater organic pollutants as the disinfection by-product precursors in surface water


Representative Publications

  • Li, X.Y., and Yang, S.F. (2006). "Influence of loosely bound extracellular polymeric substances (EPS) on the flocculation, sedimentation and dewaterability of activated sludge." Water Research, 41, 1022-1030.
  • Li, X.Y., and Wang, X.M. (2006). "Modelling of membrane fouling in a submerged membrane bioreactor." J. Membrane Science, 278, 151-161.
  • Wang, Y.H., Chan, K.Y., Li, X.Y., and So, S.K. (2006). "Electrochemical degradation of 4-chlorophenol at nickel-antimony doped tin oxide electrode." Chemosphere, 65, 1087-1093.
  • Li, X.Y., and Leung, R.P.C. (2005). "Determination of the fractal dimension of microbial flocs from the change in their size distribution after breakage." Environmental Science & Technology, 39, 2731-2735.
  • Chu, H.P., and Li, X.Y. (2005). "Membrane fouling in a membrane bioreactor (MBR): sludge cake formation and fouling characteristics." Biotechnology & Bioengineering, 90, 323-331.
  • Li, X.Y., Diao, H.F., Fan, X.J., Gu, J.D., Ding, F., and Tong, A.S.F. (2004). "Electrochemical wastewater disinfection: identification of its principal germicidal actions." J. Environmental Engineering , ASCE, 130, 1217-1221.
  • Li, X.Y., Zhang, J.J., and Lee, J.H.W. (2004). "Modelling particle size distribution dynamics in marine waters." Water Research, 38, 1305-1317.
  • Zhang, J.J., and Li, X.Y. (2003). "Modeling particle size distribution dynamics in a flocculation system." AIChE J., 49, 1870-1882.
  • Li, X.Y., Yuan, Y., and Wang, H.W. (2003). "The hydrodynamics of biological aggregates of different sludge ages: An insight into the mass transport mechanisms of bio-aggregates." Environmental Science & Technology, 37, 292-299.
  • Li, X.Y., and Yuan, Y. (2002). "Collision frequencies of microbial aggregates with small particles by differential sedimentation." Environmental Science & Technology, 36, 387-393.



      For more information of Ir Professor X.Y. Li, please visit and HKU Scholars Hub