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。COVID-19 の影響でオンライン開催となった第 55 回年会では，中国から 2 名，インドネシアから 1 名，アイルランドから 1 名を招聘し，オンラインにて研究発表を行っていただきました。そこで，受賞者に研究内容や抱負等についてご執筆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秋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
Professor, School of Environmental and Municipal Engineering,
Xi’an University of Architecture and Technology（西安建筑科技大学，教授）

Pengkang Jin（金鵬康）

Firstly, I would like to give my gratitude to theCommittee on Overseas Member Invitation Programand Awards Committee of Japan Society on Water
Environment for awarding me the JSWE-IDEA Water
Environment International Exchange Award for the55th JSWE Annual Conference. I am also honored to be
invited to attend the 55th JSWE Annual Conference
held online from March 10 – 12, 2021.
I obtained my doctoral degree of Environmental
Engineering from Xi’an University of Architecture andTechnology in June, 2005. Then, I continued my workin Xi’an University of Architecture and Technology. Ihave been engaged in wastewater treatment and reclamation for more than 20 years. My research focused onenhanced coagulation, sewer networks, advanced
biological treatment and catalytic ozonation. I havedeveloped the prediction methods for sediments andhazardous gas accumulation, enhanced biologicalnitrogen removal processes, and dissolved ozone flotation techniques. These developed techniques have been
applied in many projects including oil and gas field
wastewater treatment and reclamation, printing anddyeing wastewater treatment and recycling, andmunicipal wastewater treatment and reuse.
For this conference, I submitted my recent research
work related to printing and dyeing wastewater treatment and recycling titled “How can accumulatedorganics and salts deteriorate the biological treatment
unit in the printing and dyeing wastewater recyclingsystem?”. This work was based on an actual project in180

a printing and dyeing enterprise in Zhejiang province,
China, who wanted to increase the wastewater recycling rate to obtain decreased pollutant discharge.
However, wastewater recycling will inevitably lead tothe accumulation of inorganic ions and organic pollutants, which will result in the deterioration of upstream
wastewater treatment and reclamation systems and inturn restrict the further increase in the recycling rate.
In this study, a closed-loop printing and dyeing wastewater （PDWW） recycling system was establishedaiming at investigating the mechanism of biologicaltreatment system deterioration due to pollutant accumulation and giving strategies for removal of the accumulated pollutants. It was found that organic matteraccumulation especially intermediate products of added
dyes and auxiliaries was crucial for the biological treatment unit deterioration during the beginning ofPDWW recycling. In addition, inorganic salt accumulation can make it even worse afterwards. The proposed
dissolved ozone flotation process together with reverse
osmosis can mitigate the accumulation of organic andinorganic pollutants, respectively.
Again, it is very grateful for me to attend the 55th
JSWE Annual Conference, and share my works withother scholars. As the JSWE international associate
member, I hope the conference could obtain greaterachievements in the future, and I am really looking
forward to attending the 56th JSWE Annual Conferencein Japan.

水環境学会誌

Journal of Japan Society on Water Environment

JSWE-IDEA Water Environment International
Exchange Award
Assistant Professor, Department of Environmental Engineering
Universitas Pertamina

First of all, I would like to convey my sincere gratitude to the Japan Society on Water Environment（JSWE） for awarding me the JSWE-IDEA
International Exchange Award. It is my great honor toreceive this award at the 55th Annual Conference ofJSWE, held online on March 10-12, 2021. I would like tothank you for all your attention and support from theJSWE organizing committee.
I earned my doctoral degree（Doctor of Engineering）
from the Department of Environmental Solution
Technology, Ryukoku University, in 2015. I wassupported by Monbukagakusho Scholarship tocomplete my master’s and doctoral course at Ryukoku
University. I have been focusing on developing an integrated pollution treatment system to counter theproblem of colored wastewater and sludge treatment
from textile industry activity. I have tried to conduct acomprehensive analysis on how to proposed an alternative treatment system framework for the textile waste
problem through the recycling concept approach.
Since joining the Department of Environmental
Engineering, Universitas Pertamina in 2016, I havebeen involved in various studies related to pollution
treatment systems, especially in energy and the environment. My recent research topics are related towaste to energy, decolorization through ozonation, andother environmental engineering topics.
In the 55th Annual Conference of JSWE, I submitted
paperwork entitled “Preparation of textile sludge-based
activated carbon using physical activation with carbon

Vol. 44（A）  No. 6（2021）

Ari Rahman

dioxide for textile dyes adsorption.” In this research,
we used textile sludge as a raw material for the activated carbon production, which was carbonized before.
Physical activation by carbon dioxide was performed toimprove the surface area of carbonized sludge. BET
analysis showed an increased surface area from 97.6
m2 g-1 in raw carbonized sludge to 179.9 m2 g-1 for the
producing activated carbon. Furthermore, we did thebatch adsorption test to investigate potential adsorbent
feasibility for color removal treatment. We used twotypes of dyes. Methylene Blue Trihydrate（C.I. BasicBlue 9 Trihydrate） represented cationic dye andProcion Brilliant Red H-EXGL（C.I. Reactive Red 231）of anionic dye. The adsorption test showed that activated carbon’s adsorption capacity was 47.4 mg g-1 formethylene blue and 24.2 mg g-1 for brilliant red removal.
The result showed that the recycling of textile sludge
could be proposed as an alternative adsorbent to solve
colored wastewater problems that indirectly provide abenefit by reducing the sludge disposal problem.
The JSWE conference was a special event for
research dissemination, exchanging ideas, andexpanding the network. Again, I really appreciate tothis opportunity and very grateful to all those whohave supported me. I hope my participation in thisevent can advance Indonesia and Japan’s cooperation,
especially in the water and environment sector. Finally,
I am looking forward to contributing to future conference activities.

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JSWE-IDEA Water Environment International
Exchange AwardProfessor, Civil Engineering, School of Engineering,
National University of Ireland Galway, Ireland

Xinmin Zhan（占新民）

It is a great honour to be awarded with the JSWEIDEA Water Environmental International ExchangeAward and to be invited to participate in the 55th
JSWE annual conference in 2021. First, I want to thankthe selection committee. Even though this annualconference was held online, it was a great conference.
My presentation is NEO-GREEN concept: towards
next-generation wastewater treatment. Municipal wastewater treatment is currently facing three big challenges:（1）high material and energy inputs;（2）large
amounts of waste sludge generation; and（3）increasingly stringent treatment standards （for examplenutrients） and lack of recovery of resources （forexample phosphorus）. To address these challenges,
future wastewater treatment must adopt revolutionary
approaches to harness the energy embedded in wastewater, incorporate nutrients recovery, and minimize
waste sludge production while meeting increasingly
stringent criteria of effluent quality.
Anaerobic digestion（AD）has been widely regarded
as an essential part of sustainable wastewater treatment, due to its capacity in recovering bioenergy fromwastewater and minimizing sludge generation. To
harness its benefits, efficient and cost-effective removalor recovery of nutrients （nitrogen and phosphorus）
from AD effluent must be taken into account due tothe reduced organic matter concentrations.
Autotrophic denitrification processes（hydrogen-based;sulphur-based; anammox） appear to be the mostnatural option to couple AD for sustainable wastewater treatment, owing to their intrinsic features such182

as eliminating the need for organic-carbon, and very
little sludge production. Iron sulphides（FexSy）, mainlyin the form of pyrrhotite（Fe1-XS, 0 < x < 0.125）andpyrite （FeS2）, are nontoxic, earth-abundant sulphideminerals. In recent years, iron-sulphides-driven autotrophic denitrification has emerged as a promising alternative for nitrogen removal from organics-deficientwater and wastewater streams. Furthermore, the reaction product Fe3+ can act as an efficient phosphatescavenger via adsorption and precipitation （formingFePO4）. My team has developed and studied a naturaliron sulphide （pyrrhotite） based biofilter （PADB）
technology as a polishing unit for urban WWTPs. This
simple, cost-effective technology ensures efficient
total-nitrogen removal, indicating its immense potential
in advanced wastewater purification. Therefore, we
propose a NEO-GREEN（Natural iron sulphidEs based
biOtechnoloGy towaRds nExt generatioN wastewatertreatment）concept for future sustainable wastewater
treatment towards energy and P recovery, nitrogen
removal, and minimized sludge production.
In the NEO-GREEN concept, organic matter isconverted into biogas with AD technology, which canpotentially allow net energy recovery. Then, the anaerobic effluent is nitrified in a nitrifying biofilter so that
NH4+ is oxidized to NO2-/NO3- before being removed as
N2 in the iron sulphides bioreactor. PO43- is precipitatedor adsorbed in the bioreactor and then recovered.
Finally, thank JSWE again! I wish that there will be
more and more active research collaborations in thewater area between Ireland and Japan.

水環境学会誌

Journal of Japan Society on Water Environment

Annual Conference of JSWE:
A Window into Research Frontiers ofEnvironmental Science and Technology in Japan
School of Environmental Science and Engineering
Southern University of Science and Technology（南方科技大学）

Yu Xiaolong（余暁龍）

It is a great honor to be invited to attend the 55th
Annual Conference of JSWE. I appreciate all the JSWE
members and the Committees on Overseas Member
Invitation Program for awarding me the JSWE-IDEA
Water Environment International Exchange Award.
I got my M.S. in Bioresource Science from Ehime
University and Ph.D. in Environmental Engineeringfrom Kyoto University. When I studied in Japan, mysupervisors supported me to give presentations at theJSWE conferences. It was a wonderful chance to share
new ideas and gain inspiration. This year, due to theCOVID-19, the conference was held online. Thanks tothe JSWE staff and members, because of their dedication to the organization, we can exchange insights on
research works under serious epidemic situations.
During the conference, I joined several sessions andgot familiar feelings. The presenters reported the latest
experimental results and the audiences provided
constructive comments. Although the online meeting
made it convenient for us to talk through the microphone and shift sessions by clicking the mouse, I preferface-to-face communication and expect to visit Japan inthe future.
I returned to China in 2018 and worked as a doctoral
researcher at the Southern University of Science andTechnology. My research interests focus on removing
pollutants via biological processes, whereas microbial
treatment alone sometimes cannot efficiently solve theproblems. I, therefore, devote to research on developing methods that can enhance the performance of
microbial treatment. At this conference, I reported myresearch work entitled “Zirconium-loaded chitosanVol. 44（A）  No. 6（2021）

beads for enhanced removal of perchlorate”. I considered combining the adsorption and biodegradation totreat perchlorate, which is a toxic and mobile contaminant in waters. In the first place, I developed the gelsorbents based on using the biopolymer of chitosan.
After surficial modification by zirconium, the sorbents’adsorption capacities and efficiencies to perchlorate
were significantly improved, outperforming most of thereported materials. The further goal for this researchis to use the low-cost biomaterials both as sorbents toconcentrate the pollutants like perchlorate from waters
and as carriers for supporting the growth of specificmicroorganisms that biodegrade the adsorbed pollutants.
Facing the increasingly complex environmental problems, the close cooperation between researchers fromdifferent countries is more demanding than everbefore. I hope that JSWE will continue to improve its
international influence and contribute to promotinginternational cooperation. I think the JSWE annual
conference has become a window into research frontiers of environmental science and technology in Japan.
Everyone who attends this meeting can get valuable
information. As a former student member and now aninternational associate member of JSWE, I would liketo keep on participating in the activities organized by
JSWE and dedicating to advancing the communicationand cooperation between China and Japan. Finally, I
express my sincere thanks to my supervisors, professors Shinsuke HARUTA and Fumitake NISHIMURA,
for their kind and continuous support.

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