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Greywater, generated from domestic activities such as bathing, laundry, and washing, constitutes the largest fraction of household wastewater apart from sewage. Owing to its relatively low pathogen and organic load compared to blackwater, greywater offers significant potential for reuse in non-potable applications such as irrigation, toilet flushing, and cleaning. With increasing freshwater scarcity and overexploitation of groundwater, greywater reuse is being recognized worldwide as a sustainable strategy for urban and rural water management. This paper reviews the composition and characteristics of greywater, highlights key treatment technologies—including biological, physio-chemical, nature-based, and hybrid approaches—and examines their efficiency, limitations, and applicability. Case studies from both developed and developing countries are analysed to identify barriers such as costs, energy demand, infrastructure, and public acceptance. The review emphasizes that integrated, multi-barrier systems offer the most reliable performance, though decentralized low-cost solutions are essential for water-stressed communities. The study concludes by outlining opportunities for scaling greywater reuse.
Keywords:
sustainable water management and resilience against future water crises, Greywater reuse, Sustainable water management, Decentralized treatment systems, Water scarcity, public acceptance.
Cite Article:
"A Review on: Greywater Treatment and Reuse for Sustainable Water Management", International Journal for Research Trends and Innovation (www.ijrti.org), ISSN:2455-2631, Vol.10, Issue 9, page no.a266-a271, September-2025, Available :http://www.ijrti.org/papers/IJRTI2509033.pdf
Downloads:
0002031
ISSN:
2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator