Promoting Sustainable Water and Sanitation Practices on Construction Sites Using Bio-Digester Technology: Advancing Progress toward SDG 6

The challenge of ensuring proper sanitation on construction sites, particularly in remote and infrastructure-intensive regions of India, necessitates sustainable and innovative solutions. This research explores the implementation and effectiveness of bio-digester septic tanks infused with DRDO-developed anaerobic microbial inoculum as an alternative to traditional septic systems in labor camps associated with large-scale construction projects. Conducted at the Mindhola River bridge project site in Gujarat, the study compares conventional septic systems with bio-digesters in terms of installation time, cost-effectiveness, maintenance requirements, environmental impact, and safety. Water and soil quality parameters—including pH, turbidity, TDS, TSS, BOD, COD, and coliform presence—were analyzed, showing that bio-digesters outperform traditional systems in almost all aspects. Additionally, the use of bio-enzymes prepared from kitchen waste was tested as an environmentally friendly cleaning agent, proving effective in maintaining microbial balance and reducing chemical dependency. The bio-digester systems were not only quicker to install and more mobile but also reduced construction-related hazards and offered better long-term utility. These findings support the potential of bio-digesters as a viable sanitation solution aligned with Sustainable Development Goal 6 (Clean Water and Sanitation), especially in underserved or remote project areas. The research highlights the need for policy-level support, industry-wide adoption, and awareness regarding the benefits of integrating such sustainable technologies in infrastructure projects.