On July 11, 2026, Mr. Chadchart Sittipunt, Governor of Bangkok, conducted a live-streamed site inspection of the 580-rai On Nut Refuse Disposal Centre on Soi On Nut 86 to review ecosystem restoration progress and odor mitigation strategies. Over the past four years, the Bangkok Metropolitan Administration (BMA) has aggressively transformed this historic landfill into a thriving urban forest by planting over 48,000 trees, many of which were salvaged from municipal construction sites. This continuous environmental remediation has successfully restored local biodiversity, bringing back native birds and wildlife, and paving the way for a future public trail running route.
Addressing long-standing community concerns, Mr. Pornphrom Vikitsreth, Deputy Governor of Bangkok, outlined plans to strictly regulate and phase out older, odor-generating fertilizer composting facilities. The contracts for the site’s 600-ton and 1,000-ton composting plants are set to expire in late 2026 and June 2027, respectively, after which the BMA will reclaim the land for green space expansion. In the interim, contractors are subject to rigorous daily inspections, closed-system modifications, and mandatory closed-circuit television monitoring. Furthermore, the complex will transition to clean energy production through a 1,000-ton incinerator and a biogas power generation facility managed by Krungthep Thanakom Co., Ltd., supported by dedicated wastewater treatment infrastructure.
To ensure atmospheric transparency, the BMA has deployed an advanced electronic nose (e-Nose) telemetry system to track seasonal, wind-driven odor dispersion in real time. Reporting in Dilution to Threshold (D/T) units, current data indicates ambient levels remain well within the legal limit of 9 D/T. Governor Chadchart announced that this live e-Nose environmental data will be published online for public monitoring within the week. Ultimately, the BMA aims to redevelop the facility into a premier Green Eco Park (GEP), dividing the layout equally between lush green spaces and closed-loop, eco-friendly waste processing systems to serve as an international model for sustainable urban waste management.
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