Onsite domestic wastewater treatment using a modified septic tank – effect of hydraulic mixing on pollutant removal
Student name: Mr Rajesh Ramamoorthy
Guide: Dr Vinay Kumar Tyagi
Year of completion: 2016
Host Organisation: Clearford Water Systems Inc.
Supervisor (Host Organisation): Mr Alex Loiselle
Abstract: Onsite domestic wastewater systems have a significant role to play in addressing India’s sanitation crisis with large parts of the country yet to be covered by sewerage networks. Wastewater treatment at source when properly managed can not only be effective but also reduce costs for downstream secondary treatment. This study examines the performance of an onsite domestic wastewater treatment system for three households in the city of Agra, India. The onsite system features a modified septic tank with a hydraulic mixer and a flow attenuator installed. The effect of hydraulic mixing resulted in improved BOD and TSS removal efficiency of 62.4% and 66.7% respectively than conventional septic tanks. With further research, the septic tank with hydraulic mixer can be considered a viable alternative to conventional septic tanks as part of a larger decentralized wastewater management system.
Keywords: Decentralized, Onsite treatment, Sanitation, Septic tank, Wastewater
