Some have heated together sulfur, realgar and saltpeter with honey; smoke and flame result, so that their hands and faces have been burnt, and even the whole house where they were working burned down.” – Daoist text, 808 A.D.

Overview

Nitrate is a common groundwater contaminant that originates from agricultural runoff, fertilizers, wastewater, and septic systems. While low levels occur naturally, elevated concentrations can pose serious health risks, most notably methemoglobinemia (“blue baby syndrome”), which impairs the blood’s ability to carry oxygen, particularly in infants. Because nitrate is colorless, odorless, and highly soluble, it can move easily through soil into drinking water supplies, making testing and treatment essential to maintain safe, compliant water quality.

Pureflow Treatment Technology

Pureflow removes nitrate from water using both ion exchange and biological filtration technologies, each selected based on site conditions, performance requirements, and operational goals. Ion exchange systems utilize regenerable anion exchange resin to selectively remove nitrate from the water stream, providing a reliable and well-established treatment method with consistent effluent quality. In contrast, biological filtration removes nitrate through the process of denitrification, where naturally occurring bacteria convert nitrate (NO₃⁻) into harmless nitrogen gas (N₂) that is released to the atmosphere. This process occurs within engineered filter media that supports bacterial growth and is optimized through controlled operating conditions. By leveraging both approaches, Pureflow delivers flexible, engineered solutions that can balance performance, operational complexity, and lifecycle cost for municipal and industrial nitrate removal applications.