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In the last decades, artificial systems have been built to simulate the effect of natural areas. Built Flooded areas are now being used to treat punctual and diffuse sources of pollution water. This research was accomplished to evaluate the efficiency of built flooded areas of Surface of Free Water (SFW) in the purification of polluted superficial drainage generated in areas where Kraft or Eucalyptus cellulose residues are being composted. The experiment consisted of four free surface beds. Two were planted with Thypha dominguensis Pers. (Thyphaceae) and two were left without vegetation. The four beds presented 30 cm of water. An aliquot of effluent was directed to the system with flow of 9.92 ml/ second in each bed for a time of residence of 7 days. The project was monitored, weekly from February to October 2008, and the following parameters were measured in situ:. Temperature, pH, Dissolved Oxygen, Oxygen Saturation, Redox Potential, and in the laboratory the variables: COD, BOD5, Total Suspended Solids, Total Nitrogen Kjeldahl in the form of N, Total Phosphorus and Turbidity according to the Standard Methods. The results suggest a significant improvement in the quality of the effluent. There were significant differences in the removal efficiencies among the tanks with macrophytes, compared to the tanks without vegetation. The system of built areas of free surface planted with Typha Dominguensis, for treatment of the superficial effluent of composting areas presented the following removal efficiencies:: 26.9% of COD 42.4% of BOD5, 80.6% of Total Suspended Solids, 35.6% of Total Kjeldahl Nitrogen, 56.5% of total phosphorus and 71.9% of turbidity. There was a significant although small increment in the dissolved oxygen values in the effluent of the tanks vegetated by the transfer of oxygen to the bed. Thus, this biotechnology is recommended for the treatment of effluent in areas where there are Kraft residues. Based on what was presented above, the use of that bioAvaliação do Uso de Áreas Construídas de Superfície Alagada (SAL) para Tratamento de Efluentes Superficiais de Pátios de Compostagem da Indústria de Celulose 142 technology is recommended for treatment of effluent from areas where there is residue of Kraft Eucalyptus pulp.

rbrh

Avaliação do Uso de Áreas Construídas de Superfície Alagada Livre (SAL) para Tratamento de Efluentes Superficiais de Pátios de Compostagem da Indústria de Celulose