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Grey/ Waste Water Treatment

What is Grey/Waste water?

Greywater refers to the water generated from household activities such as bathing, laundry and dishwashing. While, Wastewater encompasses the water discharged from toilets and other sources.

The aim of installing these systems is to recycle up to 80% of the water generated per day. The treated greywater water can be used for;
  • Toilet flushing
  • Vehicle washing and
  • Vehicle washing and

SmartPaani designs and implements customized as well as plug-in modular greywater recycling systems, which works on an all-natural filtration process. The process does not use any chemicals. The proposed solution will recycle water from laundry, showers and handwashing.

Grey/ Waste Water Treatment

The system will have the following components:

  1. Settling Tank: The settling tank acts as a sedimentation unit. A significant amount of suspended particles gets settled in the tank and other particles such as grease, fatty substances get separated on the top. This allows the filter to prevent from clogging.
  2. Filter Bed: These are miniature wetlands made inside fiberglass boxes. It contains media of different grading and plants as well. These wetlands are responsible for removing biological and chemical contaminants from greywater in addition to small solid particles.
  3. Intermediate Reserve Tank: The tank acts as an intermediate holding tank from which the greywater is sent to the final reserve tank. This tank will be aerated using an artificial aeration system.

SmartPaani’s Wastewater Treatment Plant (WWTP) uses biological processes to clean the wastewater from your business, hotel, or industry to meet the discharge standards of the Ministry of Science, Technology and Environment in a cost-effective manner


All types of wastewater can be treated including wastewater coming out of household toilets, industry, hospital, hotels.

The treated wastewater from the water closet can be used for aquaculture. While all the other treated wastewater can be used for landscape and agriculture / irrigation purpose.

Wastewater due to its nature is not advised for drinking purposes. Though the chemical content and other contamination are treated it is still not advised to use the treated water for drinking purpose.

Treatment of Wastewater gives us a better use of it (recycle and reuse) before we allow it to go to drain. It also adds a social value and promotes clean environment and surrounding as the treated water can be allowed to recharge into the ground.

Greywater is wastewater generated from bathroom sinks, showers, bathtubs, and washing machines. The amount of oil and grease used in South Asian kitchens makes kitchen water considered blackwater.

Though there are technologies available to make the greywater drinkable, we have not yet adopted such methodologies, keeping in mind the water coming out of the kitchen in our subcontinent has high amount of grease.

The treated greywater can be used for flushing of the toilets, cleaning and washing of the car, cleaning of the floor, landscaping and agriculture purpose.

Recycled greywater can help meet up to 30% of your water demand. Greywater as mentioned above can be used in toilets and cleaning purposes and the fresh water then can be utilized for cooking, drinking, bathing, etc.
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