Study on Inactivation of Microalgae in Ship Ballast Water by Pulsed Electric Field and Heat Treatment

Abstract:

Invasive aquatic species discharged through ship ballast water is one of the most serious problems posed nowadays in the marine environment. Inactivation effect on microalgae by combined PEF and engine waste heat pretreatment was studied. Effect factors such as pulsed peak voltage, pulsed frequency, electrode gap and heating temperature were explored, and its mechanism of inactivate the microalgae was analyzed. The results show that at the same experimental parameters, the inlet temperature of PEF treatment stage keeps at 24°C, the inactivation percentage is difficult to achieve 90% unless the electric field strength rises to 22 kV/cm. Once the PEF treatment sample is preheated to 48°C, the inactivation percentage will be up to 99% as the electric field strenth is just 10 kV/cm.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 3163-3166
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.3163
• Online since: December 2012
• Authors: Jun Feng Zhou, Le Ping Xu, Dao Lun Feng, An Bang Hu, Ting Fei Xie
• Keywords: Ballast Water Treatment (BWT), Inactivation Mechanism, Pulsed Electric Field (PEF), Thermal Pretreatment

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