Environmental Quality Evaluation Sub-department

Evaluation and improvement of the environmental quality, and prevention and remediation of environmental pollution


We do research on the fate of environmental pollutants which are emitted due to a human activity and their effects toward the life of human being and aquatic ecosystem. We also study the biological assay, the management technology of pollutants, and the establishment of recycle system of urban water.

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  photo : Hiroaki Tanaka
Professor : Hiroaki Tanaka
Research Topics
In order to improve the quality of the environment, I do research on the fate of environmental stress, impact on the ecology, and management technology. I am working on the fate of estrogenic compounds in wastewater treatment plants and waters discharged from treatment plant and their effects to aquatic organisms, with the use of chemical analysis, bioassay, and survey at waters. I also investigate the pollution of pharmaceuticals in the environment.
Contact / Office

Research Center for Environmental Quality Management
TEL +81-77-527-6222 / FAX +81-77-524-9869

  photo : Naoyuki Yamashita
Lecturer: Naoyuki Yamashita
Research Topics
My research topic is estimation of the fate of micropollutants in the environment, the bioaccumulation, and impact on the ecosystem. Recently, I am focusing on the fate of pharmaceuticals and the effects on aquatic or aquatic organism such as algae and water flea. I am also studying on toxic substances of water-bloom occurring in lakes.
Contact / Office

Research Center for Environmental Quality Management
TEL +81-77-527-6223 / FAX +81-77-524-9869

  photo : Shuhei Tanaka
Assistant Professor : Shuhei Tanaka
Research Topics
We investigate a structure of ecosystem scientifically and aim at accumulation of the knowledge that can apply to the real field of engineering. 1) Development of restoration / reproduction technologies for reed communities around Lake Biwa 2) Development of technologies for removing an artificially organic fluorine compound in natural environment 3) Development of watershed management systems by a distributed model, I push forward these studies.
Contact / Office

Research Center for Environmental Quality Management
TEL +81-77-527-6220 / FAX +81-77-524-9869

  Research Topics

Water Quality Management for Healthy Aquatic Ecosystem


Pollutants emitted through our daily life can cause an adverse effect on not only human, but also on aquatic ecosystem. For example, estrogenic and its mimic compounds can cause a femalization of fish, and pharmaceuticals can cause an adverse effect on algae and bacteria and can produce antibiotic-resistant bacteria. In this research, we try to improve the water management by utilizing chemical analysis with LC/MS/MS and bioassay technology of bacteria, algae, crustacean and survey in the watershed.


Risk Assessment and Reduction of New Pollutants in Water Recycle System


In a watershed, surface water is reclaimed and utilized in many ways such as drinking water, agriculture, or industry. In order to maintain the value of water as a resource, not only water quantity but risk assessment of water quality is required. In our research, we focus on the fate and treatment of new pollutants, especially pharmaceuticals, for better water resource management. We conduct monitoring of rivers and wastewater treatment plants, and develop methods to reduce the pollutants by biological and physiochemical treatment technology. We also implement a comparative research with Britain and China.


Reclamation of Treated Wastewater in Agriculture


Treated wastewater is valuable as a water resource, and it is important to use treated wastewater and sewage sludge in agricultural and urban area from the aspect of resource effective utilization. The objective of this research is to evaluate the availability of treated water utilization for irrigation in Okinawa. This Okinawa project is the maximum scale in Japan and we investigate the impacts of nitrate-nitrogen and micropollutants on the soil and groundwater quality in agricultural and urban area. In addition, we also evaluate the removal efficiency and risk of pathogenic organism with membrane treatment and some kinds of disinfection methods. The technology used in this research can be applied in developing countries and can contribute to the UNfs gMillennium Development Goals for Drinking Water and Sanitationh.


Strategic Control of Combined Sewer System


Combined sewer system (CSS), which is one of sewer systems and collects wastewater and storm water in same pipelines, is adopted in urban area. In this sewer system, untreated wastewater, so-called combined sewer overflow (CSO), is directly discharged into rivers and lakes in rainy events, so water pollution caused by CSS in aquatic environment has been realized serious in Japan. The objective of this research is to suggest the strategic CSO control to prevent water pollution in drinking water resources and closed water bodies. We conduct water quality survey of influent into the wastewater treatment plant in rainy events, experiment of biological treatment of stormwater, development of water quality monitoring system with biosensor and treatment control system using mathematical models.