Household rainwater harvesting system – pilot scale gravity driven membrane-based filtration system

摘要: This paper presents the results of a pilot scale study consisting pre-treatment with granular activated carbon (GAC) filter followed by membrane filtration. Detailed characterisation rainwater tanks has highlighted that turbidity, dissolved organic (DOC) and heavy metals, in particular lead, were not compliant 2004 Australian Drinking Water Guidelines (ADWG). Further, matter present water causes fouling leads to carcinogenic compounds upon chlorination. A GAC was used as first step remove (measured terms DOC) also reduce concentration, turbidity lead. Membrane filtration can any remaining solids reducing concentrations microorganisms. In this treatment system gravity fed (Ultra Flo) operated for period 120 days. The performance assessed flux improvement quality measured against Guidelines. Determination especially later stages operation important be able size filters manner meets expected demand. effective DOC metals. reduced levels 0.3–0.4 NTU, below ADWG limit 1 NTU. concentration 0.2 mg/L. lead less than 0.005 mg/L, ADWD 0.01 all other metals well within limits. removed majority substances from raw collected roof. After initial decline, stable achieved 0.47 L/m 2 /h consistently over final 60 days experiment.