The endeavor to the sustainable cooperation in the environment
filed between China and Japan promoted by JSWE
Graduate School at Shenzhen, Tsinghua University（清华大学深圳研究生院）

Guangxue Wu（吴 光学）

With the recommendation from the Chinese
Society for Environmental Sciences and the supportof the JSWE-IDEA International Exchange Award,
I attended the 49 th Annual Conference of JSWE heldin Kanazawa from March 16- 18, 2015. It is my greathonor to be awarded and I thanks for all the supportand help from both China and Japan sides.
My research filed is mainly focusing on biologicalnitrogen and phosphorus removal from wastewater,
with consideration of the sustainable development ofenvironmental technologies such as from the viewpointof greenhouse gas emission. I joined the Graduate
School at Shenzhen, Tsinghua University since May,
2010, and have been focusing on the above filed all thetime. At present, water pollution control is still a toughtask in China, and what we do is really important tohelp to improve water quality in both urban and ruralareas.
During the annual conference, I gave thepresentation about nitrous oxide emission during
biological wastewater treatment, entitled“Sustainablebiological nutrient removal from wastewater:
mechanisms of nitrous oxide emission”. With thedevelopment of society and urbanization, we arefacing more and more serious environmental problems,such as global warming, water pollution and so on.
Therefore, we have to deal with environment problems
from an integrated viewpoint of sustainability. In thewastewater treatment, this means that we cannot
transfer pollutants in the wastewater to anotherpollutant（such as nitrogen in the liquid to nitrous
oxide in the atmosphere）. During the study, we
found that the aeration rate was an important factor
controlling nitrous oxide emission during wastewater
treatment in the multiple anoxic and aerobic process.
In addition, possible mechanisms of nitrous oxideVol. 38（A） No. 6（2015）

emission were proposed. Wastewater treatment
processes such as the multiple anoxic and aerobicmode, have been widely applied both in Japan andChina. Our study could contribute to the further
understanding this process from the sustainable
viewpoint.
During the conference, I met lots of older friends
and also make lots of new friends. Since I have workedin Shenzhen, I have made lots of Japanese friends bothfrom universities and companies, especially throughthe symposium between environmental societies
from China and Japan, and also through the Kyoto
University-Tsinghua University Cooperative Researchand Education Center for Environmental Technology.
Several aspects have impressed me deeply during thetravelling. The first is from the students. They areso kind and open-minded to explain their research
results, which is really a good characteristic forscientific work. The second is the humor of Japanese.
Most of the time, the serious attitude had been deeply
implanted in my heart. However, this travelling
has changed my impression about Japanese deeply.
The last one is the culture spreading. In the cityof Kanazawa, such as the architecture and also theriver rehabilitation, every details can be a culture
spreading media. This is really a sustainable approachto spreading our culture richness from one generation
to another.
I am happy that I have known that lots of people
have endeavored to advance the relationship between
China and Japan. Many thanks for your effort all thetime. I hope that both now and in future, I can joinin this team and contribute myself to advance thecommunication and cooperation between China andJapan, especially in the environmental field.

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