Biological treatment of dissolved organic matter by antarctic psychrophilic yeast cells

1995 Fiscal Year Final Research Report Summary

• Project/Area Number: 06650603
• Research Category: Grant-in-Aid for General Scientific Research (C)
• Allocation Type: Single-year Grants
• Research Field: Civil and environmental engineering
• Research Institution: Yamanashi Univ.
• Principal Investigator: KATAYAMA Keiko Yamanashi Univ., Faculty of Eng., Research associate, 工学部, 助手 (40111778)
• Co-Investigator(Kenkyū-buntansha): HIRAYAMA Kimiaki Yamanashi Univ., Faculty of Eng., Associate professor, 工学部, 助教授 (40107214) ; NISHIKAWA Jiro Science Univ. of Tokyo, Faculty of Science and Technology., Research associate, 理工学部, 助手 (80120202)
• Project Period (FY): 1994 – 1995
• Keywords: Antarctica / Biochemical treatment / Psychrophilic / Wastewater / Yeast

Research Abstract

Eight yeast strains were isolated from water samples as a depth of 5.0m in Lake Vanda in Antarctica and their identification and application for low temperature treatment of organic matter were investigated. These strains are obligate psychrophilic and fermentable for many sugars such as glucose and sucrose. It was concluded that the eight strains were classified into the same and a new species in the genus Candida from the view points of their morphological and physiological characteristics, coenzyme Q system (Q8) and G+C content (53%). The strain successfully degraded synthetic wastewater at 0 and 5ﾟC.The reduction of TOC,Kj-N and Total-P after 3 days of incubation was 71.5-79,73.2-79.9 and 95.8-100%, respectively. Removal of Total-P was efficiently observed. Production of biomass per TOC was about 0.9 and the biomass contained about 42% of crude protein.