Efficiency of a locally designed pilot-scale trickling biofilter (TBF) system in natural environment for the treatment of domestic wastewater

Environmental Technology
Tabassum RasoolSafia Ahmed

Abstract

In the present study, a cost-effective and simple stone media pilot-scale trickling biofilter (TBF) was designed, constructed and operated in a continuous recirculation mode for wastewater treatment with a hydraulic flow rate of 1.2 L/min (Q = 0.072 m3/h) and hydraulic loading (Q/A) of 0.147 m3/day for 15 weeks at a temperature range of 14.5-36°C. A substantial reduction in the average concentration of different pollution indicators, such as chemical oxygen demand (COD) (85.6%), biochemical oxygen demand (BOD5) (85.6%), total dissolved solid (TDS) (62.8%), total suspended solid (TSS) (99.9%), electrical conductivity (EC) (15.1%), phosphates (63.22%), sulfates (28.5%) and total nitrogen (TN) (34.4%), was observed during 15 weeks of operational period. Whereas a considerable average increase in the levels of dissolved oxygen (DO) (63.2%) was found after treatment of wastewater by the TBF system. No significant reduction in most probable number (MPN) index of fecal coliforms was observed in the effluent in first 9 weeks of operation. However, a significant reduction in the MPN of fecal coliforms was observed, i.e. 80-90% in the last few weeks of treatment. Thus, overall results suggest that pilot-scale TBF has a great potential to...Continue Reading

References

Sep 1, 1997·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·A A SzögiP G Hunt
Nov 10, 2011·East African Journal of Public Health·Chika Lawson ChukuLouis Chukwuemeka Ajonuma

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Citations

Jul 3, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Athanasios BezirgiannidisParaschos Melidis
Jan 22, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Rana Muhammad Asif KanwarHafiz Umar Farid

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