Miriam Cleide Cavalcante De Amorim,Janaína de Moraes Peres,Jaqueline Belém,Glaucia Suêrda Gomes do Nascimento,Viviane Siqueira Lima Silva, UNIVERSIDADE FEDERAL DO VALE DO SÃO FRANCISCO, COLEGIADO DE ENGENHARIA QUIMICA, miriam.cleide@uol.com.br
ABSTRACT
Water is an important and indispensable element for life. The use of water for different purposes, growing every day, is making its quality decreases in water bodies due to lack of treatment or inadequate treatment of water used. The São Francisco River is of fundamental importance for the development of the regions it crosses. Therefore, the objective was to examine, for a period of six months, water from the Rio Sao Francisco in two main points (point release of treated wastewater and a of wastewater without treatment from the city of Petrolina-PE) and more seven help-points with the intention of obtaining a diagnosis of current situation. Were analyzed the parameters temperature, turbidity, conductivity, pH, Total Solids, Dissolved Oxygen, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Phosphorous, Total Nitrogen, Chlorophyll-a and fecal coliform. Were also calculated the trophic state index. It was observed that the point of release wastewater without treatment made the result more problematic with regard to water quality. The remaining points were few parameters out of standards, emphasizing the importance of wastewater treatment. Analysis of the Trophic State Index showed characteristics of environments ultraoligotrophic, oligotrophic and mesotrophic.
Key-Words: Water quality, São Francisco river, sanitation.