Grey water in India

  • martin.laf
    Participant

    #853

    The context:
    Increasingly dense urban environment with shortage of water;
    The client:
    Middle class household;
    The space:
    1 Meter between the house and the compound wall;
    The water:
    Only grey water, no kitchen washing water but kitchen vegetable washing sink. And of course plus washing machine and showers/ sink;
    The intended usage:
    Flushing toilet and watering garden;
    Outcome desired:
    Non smelly water and as much as possible, color less;

    The solutions we have done:
    – Simple small baffle tank to seperate solid and so reduce oxygen demand;
    – Slow sand filter: 1 foot free board + 1 foot 1mm sand + gravel and drain pipe.
    Sizing:
    Water remains in contact with the sand approx 6 hours

    Result after one month:
    – Water is fairly clear, down to one foot we can see through. Smell, still very little.

    ***
    Anybody would have inputs on to improve this system or quideline in sizing?

    Thank you

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