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Table 5

Energy consumption of grey water treatment

Intended useTreatment processEnergy consumption kWh/m3
Service water (e.g. toilet flushing) Activated sludge process, disinfection, distribution 0.6a 
Membrane biological reactor, disinfection, distribution 1.2a 
Multistage RBC, disinfection, distribution <1.5b 
Membrane biological reactor, disinfection, distribution 1.5c 
Treatment, disinfection, distribution 1.5–3.0d 
Intended useTreatment processEnergy consumption kWh/m3
Service water (e.g. toilet flushing) Activated sludge process, disinfection, distribution 0.6a 
Membrane biological reactor, disinfection, distribution 1.2a 
Multistage RBC, disinfection, distribution <1.5b 
Membrane biological reactor, disinfection, distribution 1.5c 
Treatment, disinfection, distribution 1.5–3.0d 

aBieker et al. (2010), semi-centralized approach for approximately 30,000–50,000 C, grey water: 40 L/(C·d).

bNolde (2000), multi-storey building.

cFriedler & Hadari (2006), multi-storey building.

dfbr (2005).

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