Thailand Debuts System That Cleans 97% of Paint Wastewater

Construction sites across Thailand are about to get a lot cleaner, thanks to a groundbreaking water treatment system that tackles one of the industry's messiest problems.

Property developer Supalai has partnered with TOA Paint to launch the Eco-Paint Purifier, Thailand's first wastewater treatment tank designed specifically for construction sites. The system separates paint sediment from wash water and adjusts pH levels before the water gets discharged or reused.

Testing at the Supalai Parc Ekkamai-Pattanakarn condominium project revealed impressive results. The purifier removed 97% of suspended solids from paint wastewater and brought acidity levels back to neutral, meeting all required environmental standards.

Kittipong Sirilugtrakun, deputy managing director at Supalai, says managing construction's environmental footprint has become just as crucial as controlling costs and timelines. Paint wastewater has always posed challenges because it contains chemicals that can harm waterways if released untreated.

The collaboration emerged from a simple recognition: construction needs solutions built for real-world job sites. Traditional wastewater management focused on sediment trapping, but paint chemicals required something more sophisticated.

TOA Paint CEO Jatuphat Tangkaravakoon emphasizes that environmental responsibility doesn't end when paint leaves the factory. The construction phase creates its own impacts, and managing those closes the loop on sustainability.

The Ripple Effect

The purifier does more than protect Thailand's waterways. Once treated, the water can flow back into construction use, reducing the fresh water demand at building sites. This matters particularly as Thailand works toward its carbon neutrality goal by 2050.

Both companies plan to expand the system beyond its current pilot locations. After successful tests at Supalai Parc Ekkamai-Pattanakarn and Supalai Tyme Charoen Nakhon, the purifier will roll out to additional condominium and low-rise developments across Thailand.

The innovation sets a new baseline for what responsible construction looks like. Other developers can now see proof that managing paint wastewater at scale is both practical and effective.

For an industry that transforms Thailand's landscape daily, tools that protect the environment while projects rise represent genuine progress from foundation to finish.