Design and Implementation of a Low-Cost Greywater Recycling System for Residential Soci...

Objective: To engineer an affordable and scalable greywater treatment plant for Indian residential societies, enabling safe reuse of household wastewater for non-potable applications.

Water scarcity is a growing challenge in many urban and peri-urban parts of India, with residential societies facing frequent shortages and rising costs. Greywater—wastewater from baths, sinks, and washing machines—constitutes a significant portion of household effluent and is typically discharged untreated, exacerbating water wastage and environmental pollution.

The proposed solution is to design, fabricate, and validate a low-cost greywater treatment plant using locally available materials and modular biological, filtration, and disinfection processes. The system will treat greywater onsite to a quality suitable for reuse in gardening, toilet flushing, and cleaning, reducing freshwater demand and sewage load.

Key features include a multi-stage treatment process (sedimentation, filtration with sand and activated carbon, and chlorination), low-power pumps, automated flow control, water quality sensors (pH, turbidity), and a compact, scalable prototype. The working model will be demonstrated with live wastewater treatment, sensor-based monitoring, and comparative water quality results.

Industry and societal impact includes reduced water bills, lower environmental footprint, and practical adoption in Indian residential complexes. The system is scalable, replicable, and aligns with Swachh Bharat and Jal Jeevan Mission objectives, fostering sustainable urban water management.