Our project is harvesting and reusing rainwater for flushing. rainwater that falls on the roof is collected in a 10cubic meter sump. during a heavy rain the sump is allowed to over flow and the excess rainwater would flow through the drainage system. how should we calculate the following.
1) Percent site treated by implementing rainwater harvesting
2) TSS removal efficiency of the system
Thanks
Amy Rider
Sustainability ManagerKEMA Services
161 thumbs up
February 22, 2012 - 5:33 pm
1. The percent of site treated via rainwater harvesting (for the roof alone, you'll need to account for the rest of the site separately) will be a result of the storage volume compared to the anticipated rainfall across the roof area.
2. The captured rainfall that is reused for toilet flushing has a TSS Removal rate of 100%.