Proper treatment of domestic wastewater is essential before irrigation can be considered. Several treatment options are available including stabilization ponds or sand or commercially available bioreactors followed by disinfection. For public access sites a CBOD5 of less than 25 mg/L and fecal coliform bacteria count of less than 20 organisms/100 ml is recommended.
The first step in designing a system that will meet these requirements is to determine wastewater volume. This is done by identifying the number of bedrooms in the house and assuming 120 gallons of wastewater per bedroom per day. Table 1 shows the gallons per day of wastewater generated for one to five bedroom homes.
Home has three bedrooms.
3 x 120 gals = 360 gallons
Wastewater volume = 360 gallons per day| Bedrooms | Gallons |
|---|---|
| 1 | 120 |
| 2 | 240 |
| 3 | 360 |
| 4 | 480 |
| 5 | 600 |
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