As a reminder, in aspiring to complete the Living Building Challenge, we are working on a strategy to reach Net Zero Water requirements for the project and site. As such, all water used on site has to come exclusively from Collected Rainwater or Treated Wastewater.
· The rain water is assumed to be treated with the grey water treatment because the rain water may be acidic or may carry air pollutants so it needs the same level of treatment as the grey water.
· One grey water treatment system for the two residences (Family House and Guard House) located in the basement of the family house.
· One black water treatment system; the resulting water would be used for drip irrigation or possibly sent into pond.
· Pond water is treated by the grey water treatment system.
· Water circulation of the two ponds is maintained through a canal channelling the water from the upper pond to the lower one and simultaneously oxygenating the water. Water is pumped back to the upper pond. Solar pumps to be taken into consideration.
· In this option, grey water of the guard house is diverted to the sewage treatment system. (A small grey water treatment system may be used for toilet flushing.) Rain water would be channelled through gutters for irrigation. So no water pumping to the lower pool would occur form the guard house.