Technical Guidelines for Designing a Decentralised Waste Water Treatment System

TARGET GROUP: PUBLIC

OBJECTIVES

·        To bring science engineering into practice in the programmes of WaterAid CPs advised to follow the guidelines considering local contexts of effluent discharge standards while implementing DWTS.

SUMMARY

As urbanisation rapidly progresses across the world, the demand for on-site sanitation is also increasing. In order to achieve sustainable sanitation services, we need to overcome the limitations of conventional centralised waste water treatment (sewerage) systems. ‘Decentralised Waste water Treatment System’ (DWTS) refers to an integrated systems approach to treating domestic waste water. DWTS may be defined as ‘the collection, treatment, and disposal/reuse of waste water from individual homes, clusters of homes, isolated communities, industries, or institutional facilities, as well as from portions of existing communities at or near the point of waste generation’. In the case of DWTS, both solid and liquid fractions of the waste water are used near their point of origin, except in some cases when a portion of liquid and residual solids may be transported to a centralised point for further treatment and reuse. This guideline incorporates lessons learnt from experiences of different WaterAid country programmes (CPs), and considers WASH services that are accessible to poor people.

REFERENCE

https://www.pseau.org/outils/ouvrages/wateraid_technical_guidelines_for_designing_a_decentralised_waste_water_treatment_system_2017.pdf