Dr Kezhen Ying


Former PhD student in Chemical and Biological Engineering

Email: Kezhen.y@outlook.com

Tel: +44 -(0) 114 222 7500

Department of Chemical & Process Engineering
University of Sheffield
Sir Robert Hadfield Building
Mappin Street
S1 3JD

Links: University Profile



Nowadays, microalgae have been realized by governments as a sustainable and cost-competitive resource with considerable potential for biofuel production and CO2 reduction. Therefore a lot of algal projects are underway around the world, however, only a few of them are achieving an advanced stage of development due to many challenges such as insufficient CO2 supply, O2 inhibition, mixing/circulation, illumination problem and contamination, etc. My research is focus on the direction of improving CO2 supply for microalgal biomass production. The way is to introduce a novel microbubble dosing technique to the ALB, which supposedly provides  a desirable living environment for algae, such as sufficient CO2, free O2, and appropriate mixing etc., consequently improving algal productivity and CO2 uptake efficiency.

I did my Bachelor degree in Environmental Engineering and then an Msc in Environmental Energy Engineering. Now I'm a 4th year PhD student, working on 'microbubble mediated airlift bioreactor for algae culture and CO2 sequestration'.


Professor Will Zimmerman

Dr Jim Gilmour


  1. Zimmerman WB, Zandi M, Bandulasena H.C.H, Tesar V, Gilmour JD, Ying K., 2011. Design of an airlift loop bioreactor and pilot scales studies with fluidic oscillator induced microbubbles for growth of a microalgae Dunaliella salina. Applied Energy, 88, 3357-3369.
  2. Zandi M, Zimmerman WB, Gilmour JD, Woolass S, Adderley B, Ying K, Bandulasena H, Schofield N, Hanotu J., 2011. Steel plant CO2 sequestration using high efficiency micro-algal bioreactor. New and alternative technologies, section 15.
  3. K Ying, WB Zimmerman, DJ Gilmour, Y Shi. (2013) Growth enhancement of Dunaliella salina by microbubble induced airlift loop bioreactor (ALB) – the relation between mass transfer and growth rate. Biomaterials and nanobiotechnology. In press.