如何计算Gray Water
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Gray water reuse captures wastewater from sinks, showers, laundry for non-potable uses (irrigation, toilet flushing). Reduces freshwater demand.
分步指南
- 1Typical household: 50-80% of wastewater is gray water
- 2Treatment options: simple settling, biofilter, or UV disinfection
- 3Using gray water reduces freshwater demand 30-50%
例题解析
输入
Household 200 L gray water daily, uses 100 L for toilet/irrigation
结果
Freshwater reduction: 36,500 L/year
Equivalent to 1-2 months supply
常见错误注意事项
- ✕Mixing gray water with black water (toilet)
- ✕Over-storing gray water without treatment (odor and contamination)
常见问题
What's safe to include in gray water?
Sink, shower, laundry water. Exclude toilet (black water), which requires separate treatment.
How long can gray water be stored?
Without treatment: 24-48 hours (anaerobic bacteria grow). With UV/chemical: up to 1 week.
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