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vol.66 issue2FEEDING AND ALIMENTARY BEHAVIOR OF FRESHWATER MUSSEL DIPLODON CHILENSIS (BIVALVIA: HYRIIDAE)BRYOZOA FRON SHALLOW WATER IN BAHIA SOUTH, DOUMER ISLAND, ANTARCTIC PENINSULA author indexsubject indexarticles search
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Gayana (Concepción)

Print version ISSN 0717-652XOn-line version ISSN 0717-6538

Abstract

LARA, Gladys; CONTRERAS, Angel  and  ENCINA, Francisco. THE FRESHWATER MUSSEL DIPLODON CHILENSIS  (BIVALVIA:HYRIIDAE) POTENTIAL BIOFILTER TO DIMINISHCOLIFORM  LEVELS OF WATER WELLS: LABORATORY EXPERIMENT. Gayana (Concepc.) [online]. 2002, vol.66, n.2, pp.113-118. ISSN 0717-652X.  http://dx.doi.org/10.4067/S0717-65382002000200005.

Previous studies carried out in rural communities in the IX Region, Chile, have detected up to 5.400 fecal coliforms by 100 ml in drinking water from wells mainly in shallow wells. Considering the pumping and water filtration capacity of the freshwater mussel Diplodon chilensis, a laboratory experiment was carried out to evaluate the capacity of the mussels to decrease coliform levels and to digest them. The experimental results showed that 15 to 25 specimens in 30 litres of water were able to diminish the water turbidity and the coliforms load in a 6 hour-period being able also to digest them

Keywords : freshwater mussel; Diplodon chilensis; biofilter; total coliforms; fecal coliforms; RAM; well waters.

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