Revista Brasileira de Engenharia Agrícola e Ambiental
versão impressa ISSN 1415-4366
MORAES, Maria J. de; OLIVEIRA FILHO, Delly; MARTINS, José H. e SANTOS, Luiz C.. Electric signals for separation of earthworms (Eudrilus eugeniÃ¦). Rev. bras. eng. agríc. ambient. [online]. 2012, vol.16, n.10, pp. 1137-1142. ISSN 1415-4366. http://dx.doi.org/10.1590/S1415-43662012001000015.
The worm Eudrilus eugeniÃ¦ is a species adapted to tropical climates and is highly demanded as fishing bait, therefore possessing high economic value. Separation of worms from humus is typically performed by manual, mechanical, behavioral and electric methods. The objective of this study was to characterize electric pulses for separation of worms (Eudrilus eugeniÃ¦) from humus. To determine separation efficiency of worms from humus, a controlled pulse generator was used with frequencies of 1 and 5 Hz, voltages of 100 and 200Â V, peak widths of 2, 3 and 4 x 10-3 s and exposure times of 15 and 30 min. The electrical pulse characteristics which resulted in greatest separation efficiency were: 1 Hz, 2 x 10-3 s and 200Â V; and the maximum displacement index was 80% which occurred under these conditions. The survival index was 100% for the pulses which resulted in the greatest separation indices.
Palavras-chave : vermiculture; vermicomposting; electric stimulation.