On April 13, 2026, upon the invitation of the School of Chemistry and Materials Science, Ms. Le Thi Kim Oanh, Member of the Board of Trustees and Dean of the School of Environment at Van Lang University (Vietnam), and Mr. Huynh Tan Loi visited the school. They delivered academic lectures entitled Wastewater Treatment in Vietnam and Greenhouse Gas Emissions from Blackwater Septic Tanks to teachers and students of our school. This lecture was hosted by the Environmental Chemical Engineering Research Group of the School of Chemistry and Materials Science.

Le Thi Kim Oanh is a member of the Board of Trustees, Dean and Professor of the School of Environment at Van Lang University, Vietnam, and a senior expert in environmental engineering and urban sustainable development in Vietnam. She has long been devoted to research on integrated municipal solid waste management, environmental economics and green growth.
Huynh Tan Loi is a Professor at the School of Environment, Van Lang University, Vietnam, an outstanding young scholar in environmental science and an expert on carbon neutrality policies. His research focuses on greenhouse gas quantification and monitoring, urban sanitation infrastructure assessment, and climate resilience.
During the lecture, the two professors first introduced Van Lang University and their research teams to the teachers and students present. The lecture focused on Greenhouse Gas Emissions from Blackwater Septic Tanks. Based on field monitoring of 25 blackwater septic tanks in Hanoi, the study found a methane emission rate of 14.96 grams per capita per day, while methane emissions per unit COD removal were eight times the default value recommended by the IPCC. The research identified a strong correlation between methane emission rates and desludging intervals, with insignificant seasonal effects, and accordingly developed a model for estimating greenhouse gas emissions from sanitation facilities.
In the Q&A session, the two professors further discussed with the teachers and students the feasibility of methane recovery technologies for septic tanks, systemic differences between septic tanks in different countries, the underlying mechanisms behind the insignificant impact of temperature on emissions, and the potential for sludge resource utilization.

After the lecture, the Vietnamese experts visited the laboratories affiliated with the research group.

Subsequently, teachers of relevant majors from our college held discussions with the two experts on China-Vietnam international cooperative research projects.

Finally, the Vietnamese experts visited the college leaders and held talks centered on international scientific research cooperation and exchanges.