Investigation of lipid production characteristics of thraustochytrids and application for accelerating transformation of food waste to eco-feed

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K12398
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 64030:Environmental materials and recycle technology-related
• Research Institution: Hiroshima University
• Principal Investigator: Nakai Satoshi 広島大学, 先進理工系科学研究科(工), 教授 (80313295)
• Co-Investigator(Kenkyū-buntansha): 西嶋 渉 広島大学, 環境安全センター, 教授 (20243602) ; 新居 隆浩 広島大学, 統合生命科学研究科(生), 助教 (90804873)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: スラウストキトリッド / DHA / EPA / 食品残渣 / エコフィード / 家禽製品

Outline of Final Research Achievements

The objectives of this study was to establish methodologies to cultivate thraustochytrids that produce docosahexaenoic and eicosapentaenoic acids (DHA and EPA) using food residues and to use the resultant mixture of thraustochytrid biomass and food residues as a functional eco-feed giving high values to poultry products via strengthening DHA and EPA contents. First, the lipid production characteristics of the thraustochytrids were investigated. Next, the thraustochytrids were cultivated using the food residues to obtain a mixture of food residues and thraustochytrid biomass, and the mixture was fed to poultry. The results confirmed that feeding of the biomass mixture increased the DHA and EPA content in chicken eggs and the DHA content in thighs and breast meat.

Free Research Field

環境化学工学

Academic Significance and Societal Importance of the Research Achievements

本研究では、DHAやEPAを生産するスラウストキトリッドという微生物を食品残渣を用いて培養し、結果として得られるバイオマス混合物を、鶏卵や鶏肉といった家禽製品に含まれるDHAやEPAの含有量を増加させられる、家禽飼料のサプリメントとして利用する手法について検討した。実際にバイオマス混合物を産卵鶏に与えた結果、鶏卵中のDHAやEPA、もも肉やむね肉といった鶏肉中のDHAが増加することを確認した。このように、本研究では食品残渣の再利用促進と価値の高い家禽製品の生産を両立させられる成果を得た。