DOMESTIC WASTE WATER PURIFICATION BY BIO-FILITERS

In the present study, a cost-effective and simple stone media was a pilot-scale trickling biofilter (TBF).Designed, constructed and operated in continuous recirculation mode to treat wastewater, With a hydraulic flow rate of 1.2 L/min (Q = 0.072 m3 /h) and hydraulic loading (Q / A) 0.147 m 3/day, 9 weeks at a temperature range of 14.5 – 36°C. A significant drop in the average Concentration of various pollution indicators like Chemical Oxygen Demand (COD) (202 mg/l), Biochemical oxygen demand (BOD) (90mg/l), total dissolved solids (TDS) (386 mg/l), total suspended Solids (TSS) (142 mg/l), Turbidity (NTU) (920.4), was observed during 15 weeks of operational period. So significant increase in dissolved oxygen (DO) level (1.4 mg/l) was then observed. Treatment of waste water through TBF system. Most likely there is no significant decrease in numbers. An index of faecal coliforms (MPN) was detected in the effluent during the first 9 weeks of operation. However, a significant reduction in MPN of faecal coliforms was observed, i.e. The last few weeks of treatment. Thus, the overall results indicate that pilot -scale TBF excels Potential for transfer to field scale for wastewater treatment for developing small community’s country, to produce good quality wastewater, which can be safely used for irrigation as well as for ornamental purposes.