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Contact Prof. Takahiro Fujioka

Potential research topics

Water reuse

• (Materials & Process) Fabrication of high rejection reverse osmosis membranes for contaminants and pathogens

• (Analysis) Online water quality monitoring technologies for contaminants and pathogens

• (Process) Chemical pretreatment techniques for mitigating membrane fouling

• (Process) Direct nanofiltration using novel tubluer ceramic or polymeric nanofiltration membranes

• (Process) Reverse osmosis concentrate treatment for high water recovery or zero liquid discharge

• (Materials & Process) Advanced oxidation process using UV/VUV lamps and catalysts/chemicals 

Energy

• (Process) Forward osmosis or nanofiltration treatment for wastewater concentration

• (Process) Anabolic digester for concentrated municipal wastewater 

Drinking water

• (Materials & Process) Natural coagulant (Moringa Oleifera) for mitigating membrane fouling

• (Analysis) Algae auto-counting method for eutrophicated lakes

• (Analysis) Monitoring organis in water using online three-dimensional fluorescence spectroscopy.

• (Process) Removal of contaminants by ion exchange resins  

MEXT scholarship program (three positions available under University's recommendation for the Water and Environment Science Program)

PhD positions in membrane separation and online water quality analysis

The Water Treatment Laboratory led by Prof. Takahiro Fujioka at the Graduate School of Integrated Science and Technology, Nagasaki University is seeking applicants for PhD program (Water and Environment Science Program) starting in October 2026. We particularly focus on high pressure membrane separation technologies and online water quality analysis technologies in drinking water and water reuse. The scholarship covers all expenditures including travel, enrolment & tuition fees, and living expenses (>$1000 USD/month) for 3 years. 

Applicants are expected to have the knowledge/experiences associated with (a) Water Treatment using membrane separation technologies, (b) Microbiological analysis, or (c) Material Engineering for membrane fabrication/modification. Two or more year job experiences in the industry are preferable.

The applicants need to have a grade equal to or more than the B2 equivalent of the European Common Language Reference Frame (e.g., IELTS = 5.5) by end-December. They also need to have a GPA (MEXT calculation) of 2.3 or higher. 

Interested candidates should contact Prof. Takahiro Fujioka (tfujioka <a> nagasaki-u.ac.jp) along with a CV and motivation letter. If your background and ability meet our criteria, they will receive a full application guideline. The application deadline is December 19, 2025.