Removal of fecal coliforms in stabilization lagoons

The treatment of residual waters by means of stabilization lagoons, it has been a method very used due to their low costs of operation and maintenance, as well as to their efficiency in the removal of organic matter and of microorganisms pathogens. The pathogens removal, measure in terms of fecal coliforms, CF, is one of the objectives of the design and of the control of the operation of plants of treatment of residual waters. In this article summary the main results of the experimental evaluation of the removal of fecal coliforms, In a treatment system for stabilization lagoons. In 1987 the plant of treatment of Chia 1 the main components of the treatment system are an entrance structure, composed by a mitigation tank, to which he receives a 24 diameter pipe with a slope of 0.98% that transports the residual water of a sector of the Chia municipality. The average concentration of fecal coliforms is not affected notably by the hour of sampling. The value of the coliforms concentration in the tributary is of 1.0*106 NMP/100 mL, the concentration in the final tributary is bigger than the one demanded for the watering water without restrictions 3.4*104 NMP/100 mL. The removal average in the system is acceptable during the sampling period, keeping in mind that this compound for two lagoons in series, under anaerobic conditions