Development of New Wastewater Treatment Systems Applied Biotechnology

In 1985, the Ministry of Construction of the Government of Japan initiated a five year research project named Biofocus W. T. which intends to develop new wastewater treatment systems through the use of biotechnology. This paper describes the outlines of the studies in Biofocus W. T. and three new wastewater treatment processes utilizing immobilized microorganisms for organics and/or nitrogen removal developed in Biofocus W.T.