VA has designed & developed a 1000 L Modular Grey Water System for Schools / Small Houses/ Bungalows with the help of Dassualt System- La Foundation. The objectives of this project are Standardization of Grey water System and make a digital design using Solidworks software and its various interfaces like Composer and Visualize as well as to make sharable open source D-I-Y design. 

Purpose of project
  • Achieve Social impact by making ‘ready to deploy’ technologies, innovative products to society.
  • Village youths can build these products themselves and help the rural eco system.
Product Description

We have developed a 1000L modular grey water system. This system is deployed on plain ground, no excavation needed but 2 feet and 1 feet elevation are required. It contains sludge tank, four 500L IBC tanks with reeds bed, two pump of 0.25 HP for water circulation, piping connections and 1000L IBC for water storage. We are able to reduce COD of output water below 100-20 and DO greater than 2. The detail view and BOM are shown in below,

  • Capacity: 1000 L/day
  • Design for family of size: 5(People)
  • Total area required: (6000mm*2400mm) = 150sq.feet.
  • Recycle water used:
    • Gardening
      • Toilet Flushing
Material Requirement:


How It works ? – Grey Water:

There are two kinds of water – black water and grey water. Black water is the one which is released from the toilets whereas grey water is from bathroom, water released from kitchen. The amount of grey water generated depends on individual’s consumption of freshwater. The water used for washing hands, vegetables, and dishes or even for bathing can easily be recycled to bridge the ever increasing demand and supply gap.

How to recycle grey water?
  • Usually our houses are built in a way that black water and grey water get mixed. To avoid this, separate pipelines are needed to isolate the discharge of both these kinds of wastewater.
  • While the black water can go into the drain, grey water pipe can be diverted to a small sludge tank where all such water gets collected.
  • While water from bathroom will contain things like hair, oil, and soap sediments, water from kitchen sink might have small quantities of food items like rice, lentils or other such contents.
  • Once grey water is collected separately, the next step is to pass through reed beds for filtration. After the filtration process, grey water is collected in storage tank and is given excessive bubbling. After this process grey water is fit to be used for gardening or flushing purposes.
Step By Step installation:
  • Step 1: Ground & Elevation Preparation
  • Step 2: Sludge Tank (100 L)
  • Step 3: IBC 1(500 L)
  • Step 4: IBC 2(500 L)
  • Step 5: IBC 3(500 L)
  • Step 6: IBC 4(500 L)
  • Step 7: Pump & Stand 1
  • Step 8: Pump & Stand 2
  • Step 9: Storage Tank & Air Pump

500L IBC Tank Preparation:

Piping Joints Fitting:

Sludge tank & Airoxi tube units:

Final Assembly:

Installation at Mukhai School:

Installation Visit 1 on 31th October

Installation Visit 2 on 10th November