Diseño e implementación a escala de un biofiltro Tohá en la ESPOCH para la depuración de aguas residuales domésticas procedentes de la comunidad Langos La Nube

Abstract

It was implemented in the Superior Polytechnic School of Chimborazo one pilot-scale Tohá biofilter (dynamic aerobic biofilter) for the treatment of domestic waste water from the Community of Langos La Nube. The biofilter consisted of a homogenizing drum, a propulsion system, a sprinkler system, a biofiltration tank, worms trap and storage tank and disinfection of treated water. Tank biofiltration was filled with layers of stone ball and taxed at 30%, sawdust shavings and humus 70% for the introduction of humus stratum was made the adaptation of Eisenia foetida (Californian red worm) water domestic wastewater in the period of seven days and the filtering capacity is 12 liters per day , three treatments were performed in the period of three week obtaining greater efficiency in the removal of Biochemical Oxygen Demand (BOD 5) in the treatment of week 1 however treatment 3 is the one that presented greater stability, applied a hydraulic retention time of 12 hours the control parameters used by analysis before and after treatment were pH, conductivity, turbidity, ammonia, BDO5, Chemical Oxygen Demand (COD), nitrates, phosphates and Total Dissolved Solids (TDS) in the bioremediation of wastewater, removal percentages was obtained in 77.69% turbidity parameters, ammonium 68.24%, 51.69% COD, BOD 5 84.38% 80.00 % nitrates , phosphates TDS 73.47% and 22.96%, was obtained, an increase pH 0.06 Und. and reduction in conductivity of 480 µSiems/cm, biofiltration system does not cause unstable sludge is easy to use but it is recommended implementing a layer with activated charcoal to reduce TDS, improve the color parameter using pine or poplar sawdust.