Análisis del proceso de remoción de sulfuro por distintos métodos en aguas residuales de la planta de tratamiento Mollepamba de la EP-EMAPA-A

Abstract

The Mollepamba wastewater treatment plant (WWTP) of the Public Company EMAPAA presents problems regarding the amount of sulfides contained in the water that is discharged into the Pachanlica river. When analyzing the physicochemical parameters required by the TULSMA regulation, I know that the treatment maintained by the WWTP is not enough because it increases the sulfide load, exceeding the allowed limit (0.5mg / L). As a solution, three different methodologies were analyzed: aeration, advanced oxidation (H2O2) and coagulation (PAC). Each methodology was applied considering different mixing times, concentrations and speed. As results of the experimentation, it is concluded that the aeration technique achieves a sulfide elimination of 12%; oxidation 33% and coagulation 91%. The best option involves the use of the coagulant with a dosage of 150 mg / L and a mixing speed of 300 rpm, conditions that favor the attraction of loads to give rise to sedimentation and removal of the contaminant. The application of the aforementioned treatment reduced the sulfide load from 0.337 to 0.03mg / L, adjusting to the regulations. Finally, the research shows that the applied methodologies do not have a considerable effect on temperature and pH since their variation is minimal.