DEWATS-for-Food involves treating domestic wastewater and grey water in decentralised wastewater treatment systems and subsequent application as irrigation water for food production in peri-urban areas.
a. Provide increased supply of nutrient-rich food
b. Reduce exposure to health risks through improved awareness of preventive measures
2. Undertaking research and documentation of practical challenges associated with reuse of treated wastewater for food production in a community set-up.
In this approach, faecal sludge from septic tanks and pits is treated in a decentralised faecal sludge treatment plant and composted with municipal organic waste to produce nutrient-rich soil conditioner.
This approach involves at-source separation of urine, faeces and wash water in a Urine Diverting Dry Toilet. This enables immediate safe usage of (dilated) urine for crop fertigation and irrigation, while faeces can be used as agricultural soil conditioner after a sanitization period of 12 to 18 months in a closed chamber.
Risk mitigation in using untreated wastewater involves on-farm interventions like crop type restrictions, specific irrigation methods, usage of safety gear by farmers, and on-farm and local treatment measures to mitigate risks to public health.
a. Awareness-related activities
b. Farm-level interventions