FY: 2015

------------------------------------

Evaluation of biofouling on reverse osmosis membranes and its control

Biofouling is considered to be the main contributor in fouling accumulated over reverse osmosis (RO) membranes used for water desalination. The use of chlorine is effective against biofouling. However, RO membranes most commonly used are made of polyamides that can be degraded by hypochlorous acid. The objectives of this research are to study the effect of ions in water on the enhancement of membrane degradation by chlorine and to understand the effect of different water sources (water that differ in composition) and different membrane materials on the tendency of biofouling formation. The final goal is to determine the conditions under which hypochlorous acid can be used as an antifoulant. An additional aim is to propose new fouling standards (indices or methods) that could better account the effect of biofouling, unlike the current standards that are in use.

 ------------------------------------

Contaminants Analysis in Water Environments – dissolved organic matter (DOM) -

 ------------------------------------

Treatment of Organic Waste discharged from SA/PA on the expressway using Ozone Nanobubbles for Zero Emissions

 ------------------------------------

Suitable Nutrient Status for Healthy and Highly Productive Ecosystems in Each Sub-region of Enclosed Coastal Region of the Seto Inland Sea, Japan

 ------------------------------------

Oil-producing algal cultivation using an anaerobic digestion effluent.

As culture media for lipid-producing algae, wastewaters have been tested. Among them, secondarily treated sewage (STS) has been intensively investigated; however its nutrient concentrations are sometimes low as compared to that of synthetic culture media. In this study, we focused on use of anaerobic digestion effluents (ADE) because of its high nitrogen and phosphorus concentrations.