Inventor

YUSHINA YOSHINORI

JP3 patents

Patents

3 patents

US4454038AJun 12, 1984

Apparatus for biological treatment of waste water in downflow operation

CHIYODA CHEM ENG CONSTRUCT CO42 citations89

US4256573AMar 17, 1981

Process for biological treatment of waste water in downflow operation

CHIYODA CHEM ENG CONSTRUCT CO41 citations89

US4957868ASep 18, 1990

Cylindrical hollow carriers for microorganisms made of nonwoven fabric

CHIYODA CHEM ENG CONSTRUCT CO7 citations68