Dr. Dilhara Sethunga successfully defended the PhD Viva-Voce Presentation titled “Hollow fiber membrane contactors for dissolved methane recovery from anaerobic reactor effluents” on 13th February 2020 at Nanyang Technological University, Republic of Singapore. The Degree of Doctor of Philosophy (Sustainable Earth) was conferred on 31st March 2020 by Nanyang Technological University at Singapore.