Welcome to the website of the Water Treatment Lab in the Water & Environmental Engineering Program at Nagasaki University.
The Water Treatment Lab focuses on the development of membrane-based water treatment technologies and analytical techniques to produce high-quality and reliable recycled water for Non-Potable and Potable Water Reuse.

Update & News

16th January 2020 (New)
- Our new article "Dialysis as a new pre-treatment technique for online bacterial counting" in  Science of the Total Environment has been accepted.
https://doi.org/10.1016/j.scitotenv.2020.136768

6th December 2019 (New)
- Our new article "Fouling substances causing variable rejection of a small and uncharged trace organic chemical by reverse osmosis membranes" in Environmental Technology & Innovation has been accepted.

16th October 2019 (New)
- Our new article "Assessing the passage of small pesticides through reverse osmosis membranes" in Journal of Membrane Science has been accepted.

7th October 2019 (New)
- Our new article "Simultaneous nitrification-denitrification using baffled osmotic membrane bioreactor-microfiltration hybrid system at different oxic-anoxic conditions for wastewater treatment" in Journal of Environmental Management has been accepted.

28th September 2019 (New)
- Taka received the Kurita Water and Environment Foundation's Awards for Excellence in Research and gave a presentation titled "Passage of trace organic chemicals through reverse osmosis membranes" in Tokyo on 30th Oct 2019.
Kurita Water and Environment Foundation: http://www.kwef.or.jp/en/en_info.html

27th September 2019
- Our new article "N-nitrosodimethylamine (NDMA) Formation From Treatment of Seasonally and Spatially Varying Source Water" in Water has been accepted.

21st September 2019
- We completed the program of three-year Sakura Science Plan with Ho Chi Minh City University of Technology with A/Prof. Thanh Bui Xuan.
Group photo below:


AWWA Water Science will be launching in January 2019!
Taka is a member of the AWWA Water Science Editorial Board.
We encourage you to share your research through AWWA Water Science!
Your publication will appear on Wiley site and shared with water professionals including over 27,000 AWWA subscribers.

MAK: Mascot of the Water Treatment Lab

21st September 2019
- Our new article "Application of stabilized hypobromite for controlling membrane fouling and N-nitrosodimethylamine formation" in Chemosphere has been accepted.

19th August 2019
- Our new article "A surrogate-based approach for trace organic chemical removal by a high-rejection reverse osmosis membrane" in Science of the Total Environment has been accepted.

25th May 2019
- Our new article "Assessing the passage of particles through polyamide reverse osmosis membranes" in Separation and Purification Technology is available online.

25th April 2019
- Our new article "Online assessment of sand filter performance for bacterial removal in a full-scale drinking water treatment plant" in Chemosphere is available online.

22nd February  2019
- Our new article "Assessment of online bacterial particle counts for monitoring the performance of reverse osmosis membrane process in potable reuse" in Science of the Total Environment is available online.


21st December  2018
- Our new article "Transport of N-nitrosamines through reverse osmosis membrane: Role of the molecular size and nitrogen atoms" in Environmental Science & Technology Letters is available online.

13th December  2018
- Our new article "Integrity of reverse osmosis membrane for removing bacteria: New insight into bacterial passage" in Environmental Science: Water Research & Technology is available online.

12th December  2018
AWWA Water Science will be launching in January 2019!
Taka is a member of the AWWA Water Science Editorial Board.
We encourage you to share your research through AWWA Water Science!
Your publication will appear on Wiley site and shared with water professionals including over 27,000 AWWA subscribers.

30th November  2018
- Taka stays at the Nanyang Environment & Water Research Institute of Nanyang Technological University, Singapore as a guest scholar until 20th March 2019.

16th November  2018
- Our new article "Effect of Ciprofloxacin dosages on the performance of sponge membrane bioreactor treating hospital wastewater" in Bioresource Technology is available online.

10th November  2018
- Our book has been published and it is available on the website below.
Chapter 9: Removal of N-nitrosodimethylamine for Potable Reuse: Reverse Osmosis Treatment and Monitoring Technologies

1st November  2018
- Prof. Ho Kyong Shon from University of Technology Sydney, Australia (President of Membrane Society of Australasia) gave a seminar entitled "Osmotically driven processes for water purification, resource recovery and energy production" at Nagasaki University. Many companies working on FO or PRO membranes joined his presentation.

24th September 2018
- Our new article "Biofouling Mitigation by Chloramination during Forward Osmosis Filtration of Wastewater" in International Journal of Environmental Research and Public Health is available online.

10th September 2018
- Our new article "Online monitoring of N-nitrosodimethylamine for the removal assurance of 1,4-dioxane and other trace organic compounds by reverse osmosis" in Environmental Science: Water Research & Technology is available online.

8th August 2018
- Our article titled "Emerging investigator series A steric pore-flow model to predict the transport of small and uncharged solutes through a reverse osmosis membrane" has been featured as one of the journal content highlights in the latest Environmental Science: Water Research & Technology promotional flyer.

3rd August 2018
- Our new article "Moringa oleifera coagulation as pretreatment prior to microfiltration for membrane fouling mitigation" in Environmental Science: Water Research & Technology is available online.

5th July 2018
- Taka gave an invited talk at the AMS 11 conference in Brisbane: https://www.ams11.com.au/

11th May 2018

11th May 2018
- Our research collaborator - Orange County Water District - has won a honor award "2018 Excellence in Environmental Engineering and Science™ Awards Competition" for their project "A Simple, Cost-Effective Method for NDMA Analysis in Drinking Water and Recycled Water to Improve Public Health Protection".
http://www.aaees.org/e3scompetition/2018honor-research.php

8th May 2018
- Taka will be presenting his research outcome titled "Online monitoring for N-nitrosodimethylamine and bacteria removal by reverse osmosis" at the 33rd Annual WateReuse Symposium in Austin, USA on 10th September 2018.

27th April 2018
- Our new article "Real-time Online Monitoring for Assessing Bacteria Removal by Reverse Osmosis" in Environmental Science & Technology Letters is available online.
https://pubs.acs.org/doi/10.1021/acs.estlett.8b00200 (Open access)

19th April 2018
- Our new article "Water reclamation using a ceramic nanofiltration membrane and surface flushing with ozonated water" in International Journal of Environmental Research and Public Health - Environmental Science and Engineering is available online.
http://www.mdpi.com/1660-4601/15/4/799 (Open access)

12th April 2018
- Our new article "An inline ion-exchange system in a chemiluminescence-based analyzer for direct analysis of N-nitrosamines in treated wastewater" in Journal of Chromatography A. is available online.
https://www.sciencedirect.com/science/article/pii/S0021967318304631
https://authors.elsevier.com/c/1WzSg4-ggD4Tt (free download until 19th June)

1st March 2018
- Our new article "Transport of small and neutral solutes through reverse osmosis membranes: Role of skin layer conformation of the polyamide film" in Journal of Membrane Science is available online.
https://www.sciencedirect.com/science/article/pii/S0376738817328508
https://authors.elsevier.com/a/1WltT1LgHNOKLy (free download until 11th May)

17th February 2018
- Our new article "Online monitoring of N‐nitrosodimethylamine rejection as a performance indicator of trace organic chemical removal by reverse osmosis" in Chemosphere is available online.
https://www.sciencedirect.com/science/article/pii/S0045653518303072

3rd February 2018
- Taka's interview in Emerging Investigators Series of Environmental Science: Water Research & Technology blog.
http://blogs.rsc.org/ew/2018/02/02/emerging-investigators-series-takahiro-fujioka

2nd February 2018
- International Journal of Environmental Research and Public Health - Special Issue "Membrane Technologies for Water and Wastewater Treatment" is now open for submission.
15th January 2018
- Our new article "A steric pore-flow model to predict the transport of small and uncharged solutes through a reverse osmosis membrane" in Environmental Science: Water Research & Technology has been accepted and is available online.

12th December 2017
- Our new article "High rejection reverse osmosis membrane for removal of N-nitrosamines and their precursors" in Water Research is available online.

September - October 2017
Taka stayed in the University of Arizona as a short-term scholar for 2 months in 2017 and 4 months in 2018.

14th September 2017
- Our new article "Near real-time N-nitrosodimethylamine monitoring in potable water reuse via online high-performance liquid chromatography-photochemical reaction-chemiluminescence" in Environmental Science: Water Research & Technology is available on line.

1st August 2017
- Our new article "Membrane fouling, chemical cleaning and separation performance assessment of a chlorine-resistant nanofiltration membrane for water recycling applications" in Separation and Purification Technology is available on line.
http://www.sciencedirect.com/science/article/pii/S1383586617313345

19th April 2017
- Our new article "Role of membrane fouling substances on the rejection of N-nitrosamines by reverse osmosis" in Water Research is available on line.
http://www.sciencedirect.com/science/article/pii/S0043135417302518

14th March 2017
- Our new article "Degradation of N-Nitrosodimethylamine by UV-Based Advanced Oxidation Processes for Potable Reuse: a Short Review" in Current Pollution Reports is available on line.
http://rdcu.be/p2sAhttp://rdcu.be/p2sA
http://link.springer.com/article/10.1007%2Fs40726-017-0052-x

13th March 2017
- Taka gave an invited presentation titled "Transport of trace organic chemicals through RO membranes for potable water reuse / 下水飲用再利用における微量物質の膜透過" at the Maku Salon organised by Kobe University. http://maftech-kobe.or.jp/home/salon/

20th December 2016
- Taka visited in Ho Chi Minh City University of Technology, Vietnam for future collaboration with A/Prof. Bui Xuan Thanh. www.buixuanthanh.com

5th December 2016
- Taka gave an invited presentation titled "Prediction of transport of trace organic chemicals through RO membranes  / 下水再生における微量物質の膜透過予測" in Kitakyushu. http://committees.jsce.or.jp/eec/

27th October 2016
- Taka gave an invited presentation at the 33th New Membrane Technology Symposium 2016 in Tokyo. https://school.jma.or.jp/membrane/index.html

20th September 2016
- Taka gave an invited presentation titled "Role of membrane technologies in potable water reuse and their R&D topics / 下水飲用再利用における膜処理の役割と今後の開発課題" at the Maku Salon organised by Kobe University. http://maftech-kobe.or.jp/home/salon/