Inactivation of microalgae in ballast water with pulse intense light treatment

Daolun Feng; Jidong Shi; Dan Sun

doi:10.1016/j.marpolbul.2014.09.006

Inactivation of microalgae in ballast water with pulse intense light treatment

Mar Pollut Bull. 2015 Jan 15;90(1-2):299-303. doi: 10.1016/j.marpolbul.2014.09.006. Epub 2014 Nov 18.

Authors

Daolun Feng¹, Jidong Shi², Dan Sun²

Affiliations

¹ College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, PR China. Electronic address: fengdaolun@aliyun.com.
² College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, PR China.

PMID: 25440896
DOI: 10.1016/j.marpolbul.2014.09.006

Abstract

The exotic emission of ballast water has threatened the coastal ecological environment and people's health in many countries. This paper firstly introduces pulse intense light to treat ballast water. 99.9 ± 0.09% inactivation of Heterosigma akashiwo and 99.9 ± 0.16% inactivation of Pyramimonas sp. are observed under treatment conditions of 350 V pulse peak voltage, 15 Hz pulse frequency, 5 ms pulse width and 1.78 L/min flow rate. The energy consumption of the self-designed pulse intense light treatment system is about 2.90-5.14 times higher than that of the typical commercial UV ballast water treatment system. The results indicate that pulse intense light is an effective technique for ballast water treatment, while it is only a competitive one when drastic decreasing in energy consumption is accomplished.

Keywords: Ballast water; Energy consumption; Microalgae; Pulse intense light.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Humans
Introduced Species
Light*
Microalgae / radiation effects*
Ships*
Sterilization / methods
Water
Water Purification / methods*

Substances

Water