Time Series Analysis of the TSS, TDS, BOD, COD, and Turbidity of Waste Water in a Pre-filtration Chambers of Enhanced Household Septic Tank

Abstract

Beyond copious production of biogas, household septic tanks present largely untapped potentials for waste water recycling, especially in area with difficulty in getting sustainable supply of water and energy. The black water (the faeces and urine from the toilets) and grey water (the waste water from the bathrooms, kitchen and laundry) in the septic tank can be harnessed for biogas production and could be recycled for use in irrigation and other domestic uses. In this work, an enhanced septic tank system was designed and implemented in the preliminary treatment of domestic waste water. From the results obtained the system has the ability to significantly reduce the TDS, turbidity, and BOD of a given sample prior to filtration. The COD and TDS of the sample decreased and increased with time due to pressure buildup. This informs the timing for fluid transfer into the next phase of the recycling – sand filtration. Optimization of the design and operations of the new enhanced septic tank system is important in the actualization of the goal of having efficient bio-waste recycling and conversion.