ABSTRACT
ABSTRACT: Example results are presented from a five year study of combined grey water and rainwater reuse for lavatory flushing (40 population student hall). Treatment (75 litres/hr) was a sequence of balancing, bioreactor and filtration. The project also included metering of all water using appliances and the data shows increased showering compared to domestic households but otherwise similar use and peaking factors. There was always surplus reclaimed water but washing machine effluent was added during year 2 to challenge the treatment plant. Average treated water qualities were BOD 3 mg/L turbidity 2NTU and faecal coliforms 40 cfu/L. UV disinfection was added and eliminated the indicator bacteria.
