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Author
Rodríguez Martin, Sergio
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Abstract
In this thesis, the emissions of suspended solids (SS) and the chemical oxygen demand (COD) of a PVC producer, located in Martorell, are reduced to meet the future limits given by the European administration.
This fact has led to a study of the current water treatment, which consists of a coagulation-flocculation and decantation to eliminate SS and COD. All variables of the process that can probably affect these parameters have been studied, because the current water treatment does not reach the legal values of SS and COD expected for next year. For this reason, a different oxidation test is carried out for the removal of dissolved COD and, flocculation – coagulation (Jar test) to find the optimum concentration of the coagulant and flocculant. In addition, field tests are carried out to work with different possible such as the location of the supply of the flocculant or its increase.
Finally, after analyzing the results of the study and identifying possible inefficiencies in the water treatment process, through different suppliers, different proposals for improvement have been studied. It has been decided to incorporate the best resolution of the inefficiencies identified to achieve the legal values of the two critical parameters (COD and SS), which consists of a double decanter to divide the hydraulic load among other modifications.
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