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Quantification of the energy required for the destruction of Balanus amphitrite larva by ultrasonic treatment

Published online by Cambridge University Press:  05 October 2010

Nishant Seth
Affiliation:
Birla Institute of Technology and Science, Pilani, Rajasthan, India
Piyul Chakravarty
Affiliation:
Birla Institute of Technology and Science, Pilani, Rajasthan, India
Lidita Khandeparker
Affiliation:
Birla Institute of Technology and Science, Pilani, Rajasthan, India
Arga Chandrashekar Anil*
Affiliation:
National Institute of Oceanography, Council of Scientific and Industrial Research, Dona Paula, Goa-403 004, India
Aniruddha B. Pandit
Affiliation:
Institute of Chemical Technology, N. P. Marg, Mumbai-400 019, India
*
Correspondence should be addressed to: A.C. Anil, National Institute of Oceanography, Council of Scientific and Industrial Research, Dona Paula, Goa-403 004, India email: acanil@nio.org

Abstract

Ultrasonic treatment, a relatively less explored technology in water disinfection, was used to quantify the energy required for the destruction of larvae of barnacle Balanus amphitrite, which is a major marine fouling and a potential invasive organism. Since the power used and treatment time for disinfection are economically, and practically, the most important parameters, the energy required to pulverize the larvae into pieces ≤30 µm was determined as a function of the acoustic power density. The present investigation suggests that an ultrasonic system operating at 20 kHz and 0.0975 W/cm3 can effectively pulverize barnacle larvae having length (~440 µm) and breadth (~350 µm) within 45 seconds using 0.1 mJ/larva of pulverization energy. It was also observed that following pulverization of the larvae, the bacterial abundance increased and the rate of release of bacteria was dependent on power level and treatment time, which in turn decided the pulverization rate and hence the rate of release of bacteria.

Information

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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