Development of inactivation method on zooplankton and bacterium in water using micro bubbles generated by pulsed power

2017 Fiscal Year Final Research Report

• Project/Area Number: 26289079
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Niigata Institute of Technology
• Principal Investigator: IMADA Go 新潟工科大学, 工学部, 教授 (60262466)
• Co-Investigator(Renkei-kenkyūsha): TAKESONO Satoshi 新潟工科大学, 工学部, 教授 (20288252)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: パルスパワー / 水中微生物 / 菌 / 不活化

Outline of Final Research Achievements

Inactivation method on zooplankton and bacterium in water has been developed. Micro bubbles and shock wave to inactivate the microorganisms are generated by pulsed power technology. The diameter and number density of the micro bubble are estimated to be 50 um and 0.065 mm2, respectively. The velocity of the shock wave decreases to Mach number 1 if it propagates in 200 us. We found that 98 % of the larva of Artemia as a zooplankton is successfully inactivated by firing 800 injections of the pulsed power into water. The energy efficiency for inactivation reaches 0.25 million larvae a kWh. Bacillus subtilis as a bacterium are also inactivated by firing 100 injections. The inactivation rate and energy efficiency are 97 % and 4 trillion cells a kWh, respectively.

Free Research Field

電力工学