Proceedings of the Korean Institute of Information and Commucation Sciences Conference (한국정보통신학회:학술대회논문집)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Effect of Hydroxyl Radicals on Photosynthesis Pigments of Phytoplankton in Ship's Ballast Water of 20t/h

  • Bai, Xiyao (Environmental Engineering Institute, Dalian Maritime University) ;
  • Bai, Mindong (Environmental Engineering Institute, Dalian Maritime University) ;
  • Zhang, Zhitao (Environmental Engineering Institute, Dalian Maritime University) ;
  • Bai, Mindi (Environmental Engineering Institute, Dalian Maritime University) ;
  • Yang, Bo (Environmental Engineering Institute, Dalian Maritime University)
  • Published : 2004.05.01
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Abstract

A pilot-scale system of 20t/h for the treatment of ship's ballast water and the setup of dissolved hydroxyl radical was introduced in this paper. With this experimental system, the kill efficiencies of bacteria, mono-algae, protozoan reach 100% within 2.67s when dissolved OHㆍconcentration is 0.6mg/L. At the same time, the effect of hydroxyl radicals on the photosynthesis pigments of phytoplankton was done. The results indicate that the contents of chi-a, chl-b, chl-c and carotenoid are decreased to 35~64% within 8.0s further to the lowest limit of test after 5 minutes. When dissolved OHㆍratio concentration is 0.68mg/L, the attenuation efficiencies of photosynthesis pigment are 100%. Therefore the invasive marine species can be killed in the process of the inputting and discharge ship's ballast water.

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