PhD in Civil Engineering
Adjunct Assistant Professor
Research Area
Research Interests
Saline wastewater treatment
Development and application of granular sludge (anaerobic, anoxic, and aerobic) for wastewater treatment
Modelling of biological wastewater treatment
Acid Mine Drainage (AMD) treatment and metal recovery

PhD , The Hong Kong University of Science and Technology

Selected Publications

Guo, G., Wu, D.*, Hao, TW.*, Mackey, HR., Wei, L., Lu, H., Chen, GH. (2016). Granulation of susceptible sludge under carbon deficient conditions: A case of denitrifying sulfur conversion-associated EBPR process. Water Research. 103: 444-452.

Tsui, TH., Chen, L., Hao, TW.*, Chen, GH.* (2016). A super high-rate sulfidogenic system for saline sewage treatment. Water Research. 104: 147-155.

Tsui, TH., Hao, TW.*, Chen, GH. (2016). Gas-enhanced operation and stepwise organic stressing as a new alternative in realizing successful sludge granulation in high-rate anaerobic bioreactor for wastewater treatment. HKIE Transactions Hong Kong Institution of Engineers, 23: 222-229.

Hao, TW., Luo, JH., Mackey, HR., Guo, G., Liu, RL., Chen, GH*. (2016). Impacts of short-term changes in temperature, pH, oxygen, nitrite and free nitrous acid on sulfate reducing granular sludge. Applied Microbiology and Biotechnology. 100: 8563-72.

Zan, FX., Hao, TW.*, Chi, K., Ekama, G.A., Chen, GH.* (2016). Using sulfite pretreatment to improve the biodegradability of waste activated sludge. RSC advances. 6, 71875-71881.

Hao, TW., Luo, JH., Su, KZ., Wei, L., Mackey, HR., Chi, K., Chen, GH*. (2016). An example study for granular bioreactor stratification: Three dimensional evaluation of a sulfate reducing granular bioreactor. Scientific Report. 6: 31718.

Wu, D., Ekama, G., Chui, HK., Wang, B., Cui, YX., Hao, TW., van Loosdrecht, MCM., Chen, GH*. Large-scale Demonstration of the Sulfate reduction Autotrophic denitrification Nitrification Integrated (SANI®) Process in Saline Sewage Treatment. Water Research. 100: 496–507.

Guo, G., Wu, D.*, Hao, TW., Mackey, HR., Wei, L., Wang, HG., Chen, GH*. (2016) Functional bacteria and process metabolism of the Denitrifying Sulfur conversion-associated Enhanced Biological Phosphorus Removal (DS-EBPR) system: An investigation by operating the system from deterioration to restoration. Water Research. 95: 289–299.

Mackey, HR.*, Morito, GR., Hao, TW., Chen, GH. (2016). Pursuit of nitrifying granular sludge for urine stabilization. Chemical Engineering Journal. 289:17−27.

Luo, JH., Wei, L., Hao, TW.*,  Xue, WQ., Mackey, HR., Chen, GH*. (2015). Effect of L-tyrosine on aerobic sludge granulation and its stability. RSC advances. 12:10056–10065.

Hao, TW., Luo, JH., Wei, L., Mackey, HR., Liu, RL., Morito, GR., Chen, GH*. (2015). Physicochemical and biological characterization of long-term operated sulfate reducing granular sludge in the SANI® process. Water Research. 71: 74−84.

Hao, TW., Xiang, PY., Mackey, HR., Chi, K., Lu, H., Chui, HK., van Loosdrecht, MCM., Chen, GH*. (2014). A Review of Biological Sulfate Conversions in Wastewater Treatment. Water Research. 65: 1−21.

Luo, JH., Hao, TW., Wei, L., Machey, HR., Lin, Z., Chen, GH*. (2014). Impact of influent COD/N ratio on disintegration of aerobic granular sludge. Water Research. 62: 127−135.

Hao, TW., Wei, L., Lu, H., Chui, HK., Mackey, H., van Loosdrecht, MCM., Chen, GH*. (2013). Characterization of sulfate-reducing granular sludge in the SANI® process. Water Research. 47: 7042−7052.

Hao, TW., Lu, H., Chui, HK., van Loosdrecht, MCM., Chen, GH*. (2013). Granulation of anaerobic sludge in the sulfate-reducing up-flow sludge bed (SRUSB) of SANI® process. Water Science & Technology. 68: 560−566.