This study investigated the feasibility of utilizing composite septic tank to reduce cost, save space and prevent faecal related diseases. Survey research methodology was adopted based on people’s experience with septic tank, water use, soil properties, land space, user numbers and user satisfaction. The study also provides procedure in the design of a two-compartment septic tank with soil absorption field for three composite houses of thirty residents. Calculation utilizing Brazilian code was employed in the sizing of a two-compartment septic tank, which considers the tank in four zones; the scum zone, the sedimentation zone, the sludge digestion zone and the sludge storage zone. It was found that majority of the residents in the study area connected with septic tanks are not only willing to share composite septic tanks but are also financially capable of constructing and maintaining it. Shared septic tank coupled with suitable conditions is cost effective for households.
Key words: Shared septic tank, households, sanitation, septic tank design, cost effective.
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