Enhancing of duckweed biomass productivity by plant growth-promoting bacteria (PGPB) for high efficient biorefinary and CO2 reduction

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H02861
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Design and evaluation of sustainable and environmental conscious system
• Research Institution: University of Yamanashi
• Principal Investigator: TOYAMA Tadashi 山梨大学, 大学院総合研究部, 准教授 (60431392)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: バイオマス利活用 / バイオリファイナリー / ウキクサ / デンプンバイオマス

Outline of Final Research Achievements

Duckweed is recognized as alternative feedstock for production of biofuels. In this study, many types of plant growth-promoting bacteria (PGPB) which can increase duckweed growth rate were isolated, and their mechanisms involved in duckweed growth promotion were clarified. PGPB-duckweed cultivation reactors using effluent of a sewage treatment plant produced efficiently duckweed biomass. The biomass production rate was 2-3 times higher than that of normal duckweed cultivation without PGPB. The duckweed biomass showed high ethanol and methane production potentials. The results demonstrate that the use of PGPB in duckweed cultivation can improve the efficiency of duckweed biomass refinery to produce biofuels (ethanol and methane).

Free Research Field

環境工学