Clearance rate of faecal coliforms by netropical freshwater clam

Acta Agronómica

Guzmán Alvis, Angela Inés¹  Mallama Leyton, Juan René¹ 

[1] Universidad Nacional de Colombia, Palmira, Colombia

关键词: Anodontites tortolis;    biofilter;    bivalves;    clams;    clearance rate;    coliforms;    Escherichia coli;   

DOI  :  

学科分类：农业科学（综合）

来源: Universidad Nacional de Colombia * Facultad de Ciencias Agropecuarias Palmira

【 摘 要 】

Under laboratory conditions the efficiency of the freshwater clam Anodontites tortolis to diminish the quantity of faecal coliforms, determined by the membrane filtration method during eight hours was evaluated. The experiment was design with two treatments (two densities of six (T1) and eight clams (T2) and a control) and three replications. Statistical significant differences (P<0.05) according to the Kruskal-Wallis test for the clearance rates were found. The highest levels of remotion of E. coli belonged to the treatment in which there was the highest number of individuals. The clearance rate of the clams varied between 0.47 and 3.80 l.h-1.ind-1 which is reported in the literature. Removal levels showing A. tortolis suggest that this clam can be used as a biological resource for the treatment of the tertiary waters contaminated with faecal coliform bacteria.

【 授权许可】

CC BY-NC-SA