水環境国際招聘賞（いであ招聘賞）（JSWE‑IDEA Water Environment International
Exchange Award）授賞に関して
本会では，水環境分野の国際交流・国際協力の促進を目的として，いであ株式会社からのご出捐により，水環境国際招聘賞と水環境国際活動賞を設けております。水環境国際招聘賞は本会年会で研究発表を行う海外在住外国人会員に対して，来日費用等の助成を行う制度です。第 53 回年会には中国から 3 名，韓国から 1 名を招聘し，研究発表を行っていただきました。発表を終えて帰国された受賞者に参加報告を書いていただきましたので，ご紹介します。
なお，今年度の水環境国際招聘賞の募集案内は夏頃に本誌会告に掲載する予定です。
（水環境国際活動賞・招聘賞選考委員会）

JSWE-IDEA Water Environment International
Exchange Award
Associate Professor, Department of Civil and Environmental Engineering,
Korea Advanced Institute of Science and Technology（韓國科學技術院，副教授）

Seoktae KANG（姜錫泰）First of all, I would like to express my special thanks
to JSWE-IDEA committee for awarding me this greathonor in 53rd annual conference held in Yamanashi
from March 7‒9, 2019. It was a great memory to meetmany colleagues and discuss on mutual interests.
I completed my Ph.D. at KAIST（Korea Advanced
Institute of Science and Technology） in the department of Civil and Environmental Engineering. Then, I
continued the study on nanomaterials and membrane
ﬁltration at Yale University as a post-doctoral associate. Since I joined KAIST, I have been on expandingknowledge in the area of separation processes
including adsorption and membrane ﬁltration for thesafe and sustainable water production. My research islargely concerned with overcoming economic and technological barriers of existing adsorption and membrane
separation technologies with the aid of state-of-art
analytical and modeling tools. I has also tried to merge
emerging nanotechnologies with separation processes,
and ﬁrstly proved the antibacterial activity of carbon
nanotubes （CNTs） in the aquatic environment. My
recent research topics are the hybrid ceramic nanoﬁltration membrane for water and wastewater treatment, novel electrochemical systems for CO2 conversion, environmental applications and implications ofnanomaterials, colloidal and microbial interactions withsolid surfaces for biofouling control of membraneprocesses.
In this conference, I talked about the application of
conductive hollow-ﬁber membrane（CHM）made withmulti-walled carbon nanotubes（MWNTs）for the novel
Vol. 42（A） No. 6（2019）

electrochemical oxidation system. During the typicalelectrochemical oxidation process, the diﬀusive transport of contaminants are signiﬁcantly limited due tothe very small concentration gradient of emerging
contaminants （ECs） between bulk solution and electrode surfaces. Here, I tried to overcome the diﬀusional
limitation of ECs to anodic electrode by the convective
transport using permeation ﬂow into pores of CHM for
rapid and eﬃcient electrochemical oxidation of ECs.
The CHM prepared by typical phase inversion andtemplate elimination methods was highly porous（39 5LMH/bar）and electrically conductive（57 5 S cm-1）. In
the typical electrochemical operation, three ECs（bisphenol A, dichlofenac, sulfamethoxazole） werecompletely oxidized regardless of hydraulic retention
times from 2 5 minutes to 40 minutes in convective
ﬂow operation using CHM, while conventional operation showed less than 50％ of removal at short HRTs.
Overall, the novel CHM process enabled a higher
energy eﬃciency （>60％） than conventional electrochemical oxidation（<20％）. As for the future study, I
will try to scale up the CHM reactor for the ﬁeldapplication.
I really enjoyed several presentations including
UV-LED for biocidal applications, novel treatment technologies of ECS, and environmental educations fordeveloping countries. I believe that JSWE continue tocontribute to future collaboration, and thank professors
and students of JSWE again for their dedication on theresearch and organizing the conference.

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JSWE-IDEA Water Environment International
Exchange AwardProfessor, School of Ecological and Environmental Sciences,
East China Normal University（華東師範大学，教授）

Xueqin Lu（陆雪琴）I am very pleased to be invited to attend the 53rd
Annual Conference of Japan Society on Water
Environment（JSWE）held from March 07‑09, 2019 in
Yamanashi, Japan. I would like to thank JSWE
committee for providing me this great opportunity toattend this wonderful conference, to visit such beautiful city, Kofu, and to meet so many researchers in
diﬀerent research areas, from diﬀerent countries. I also
want to say thank you to the award committee toaward me the JSWE-IDEA Water Environment
International Exchange Award, and it is indeed a greathonor to win this Award.
I got my Ph.D. in Tohoku University. My deepest
gratitude goes ﬁrst and foremost to my supervisor,
Prof. Yu-You LI, for guidance through my graduate
program and career. I would also like to thank Prof.
Kaiqin Xu and Dr. Takuro Kobayashi for supporting
my research in National Institute for Environmental
Studies. I think what I have learned from Prof. LI,
Prof. Xu and Dr. Kobayashi is not only about my study
but also include how to propose and solve problems
during my further study and life. In Jul. 2016, I wasawarded “JSPS Postdoctoral Fellowship for ForeignResearchers” by the Japan Society for the Promotionof Sciences （JSPS）, and worked as the Postdoctoral
research fellow in Tohoku University for
Environmental Studies, Japan till Sep. 2018. After
Finished JSPS program, I joined in East China NormalUniversity in 2018.
In the conference, I gave a presentation regrading“Development and spatial microstructure variation ofmembrane foulants in a Hollow Fiber Anaerobic

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Membrane Bioreactor for milk waste and sewage
sludge co-treatment”. As we know, the continuous
consumption of fossil fuels has caused energy crisis.
And this issues thus promotes research into the development of new technologies for renewable energy
recovery from diﬀerent kinds of bio-wastes, likesewage sludge and milk waste. Anaerobic membranebioreactor（AnMBR）has been given much attention
by researchers due to its highly eﬃcient degradationof organics and its direct use the permeate with highnitrogen and phosphorus for irrigation. Up to now,
most of the studies related to AnMBR have focused on
diﬀerent kind of wastewater, while a few are related tohigh-strength milk waste and sewage sludge.
Therefore, a hollow ﬁber type submerged AnMBR（HF-AnMBR）was set up for the methanogenic degradation of milk waste and sewage sludge. The results
showed that milk waste and sewage sludge‒fed
HF-AnMBR could operate stably for around 120 dwith the biogas production rate approaching 2 5 ± 0 3
L L-1 d-1 at optimal OLR 6 g-COD L-1 d-1 and membrane
operation performance analysis through membrane
fouling revealed that cake layer fouling was the main
contribution to the total fouling（70 4％）.
Finally, I want to thank JSWE committee once again
for oﬀering me this chance to introduce my new
research results, and to communicate with Japaneseexperts. I am very sure that the amazing experience
will make great contributions to the future researchcollaboration and building more solid friendshipbetween Japan and China. I am looking forward toattend JSWEʼs future conferences.

水環境学会誌

Journal of Japan Society on Water Environment

JSWE-IDEA Water Environment International
Exchange Award
Associate Research Fellow, School of Environment,
Tsinghua University（清华大学，副研究員）

WU Yin-Hu（巫寅虎）I am WU Yin-Hu from School of Environment,
Tsinghua University. With the recommendation of theChinese Society for Environmental Sciences, I wasdelighted to attend the 53rd Annual Conference ofJSWE that was held in Kofu from March 07‑09, 2019.
First of all, I would like to thank the Japan Society onWater Environment（JSWE）． It is my great honor toreceive the （JSWE-IDEA） Water Environment
International Exchange Award. I was delighted toattend this conference and to introduce my new
research results to the Japanese experts.
I got my doctoral degree in the ﬁeld of Environmental
Science and Technology from Tsinghua University inJuly 2014. I continued my post-doctoral research in
Department of Engineering Science, University ofOxford. In February 2018, I came back to China andgot the position as an associate research fellow in
School of Environment, Tsinghua University.
My research mainly focuses on the biological risk
control of reclaimed water, including the risk of water
bloom during landscape usage of reclaimed water andmicrobial risks during industrial usage of reclaimedwater. Biofouling is the main problem during the operation of reverse osmosis（RO）process for wastewater
reclamation. Chlorine disinfection is the most commonly-used process to inactivate microorganism in thepretreatment for RO process. Although chlorine disinfection inactivates most bacteria in wastewater, somechlorine-resistant bacteria could still survive and themicrobial community structure changes signiﬁcantly
after chlorine disinfection.

Vol. 42（A） No. 6（2019）

In our research, it was found that chlorine disinfection could signiﬁcantly inactivate the bacteria in wastewater. However, the microbial community structure
analysis revealed that the abundance and species
number of chlorine-resistant bacteria increased signiﬁcantly with the increase of chlorine dosage. These
remaining bacteria were found to produce more EPS
with higher molecular weight, which could be the maincause of severe RO membrane fouling. These ﬁndings
are contrary to the common sense that chlorine disinfection should be used to prevent the biofouling of ROsystem. This work could provide novel insight for thedesign and operation of RO system for wastewater
reclamation.
This is my ﬁrst time to attend the JSWE annualconference. During the conference, I met many distinguished researchers, engineers and students. Their
presentations are very interesting and inspiring. We
had good communication on speciﬁc research studies
as well as on cultural exchanges. Kofu is a beautiful
and historical city. It is a wonderful place to hold theconference. I think this kind of activities are very
import and valuable. The amazing experience will
make great contributions to the future research collaboration and build more solid friendship between Japanand China.
I am looking forward to contribute to future activities
and communications between Chinese and Japanesesocieties.

199

JSWE-IDEA Water Environment International
Exchange Award
Associate Professor，School of Environment, Beijing Normal University（北京師範大学，副教授）

Yu Yang（楊禹）It is a great honor to be invited to attend the 53th
Annual Conference of Japan Society on Water
Environment （JSWE） held in Yamanashi University
from March 7 to 9, 2019. First of all, I would like tothank the organization committee of the conference forits gracious invitation and support.
I got a doctorate from the University of Tokyo andmy supervisor professor is Prof. Takizawa. After that,I back to China and working in Beijing NormalUniversity. My research area mainly targeted in water
treatment technologies, especially at membrane related
process and membrane fouling control. In this conference, I met many old friends and new friends. We havethe opportunity to deeply discuss the related researcharea.
I introduced our latest research results, entitled
Impact of biofouling on pharmaceutically activecompounds retention by nanoﬁltration and reverse
osmosis membranes. As we know, pharmaceuticallyactive compounds （PhACs） pose signiﬁcant environmental health threats because they are physiologicallyactive even at trace concentrations（ng L‑1 to µg L‑1）.
Nanofiltration （NF） and reverse osmosis （RO）
membrane have been proposed as promising technologies in the removal of PhACs. However, biofouling as
most sever fouling changed membrane surface properties and then may inﬂuence the rejections. Therefore,
investigations of eﬀects of biofouling on permeate ﬂux
and PhACs rejections, and mechanisms underlying

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these eﬀects were important for improving theremoval eﬃciency of membranes. In this study, weclarify the eﬀects of both dead cells and live cells on
the biofouling formation process and on the rejectionsof PhACs. As the increasing degree of PhAC rejection
improved with biofouling of NF membrane, eﬀect oflive cells on the PhAC rejection became severer
through steric exclusion. Dead cells mainly decreased
the rejections in the early biofouling stage with higher
ﬂux for NF membrane. Then, in the later stage, PhAC
rejection declined less or even increased with reduced
ﬂux. Therefore, BEOP mechanism was dominant in theearly stage whereas the steric exclusion graduallyimproved in the later stage of biofouling with deadcells. Hence, we conclude that dead cells were found topromote cell regrowth in feed water and increase thetotal cells and bioﬁlm thickness on membrane surfaces,
which led to enhanced BEOP mechanism.
Now, there are many water pollution problems in
China require international cooperation to solve. Our
research team also cooperated with many institutionsin Japan, such as the University of Tokyo, National
Institute for Environmental Studies and Kanazawa
University and so on. I hope China and Japan can keep
the long-term cooperation and communication on the
research area, and working together to solve international environmental problem. I also want to contributeto further activities between China and Japan.

水環境学会誌

Journal of Japan Society on Water Environment