Nutrient Analyzers & Sensors

Nutrient Analyzers & Sensors

Nutrient analyzers and sensors provide continuous monitoring of nitrogen- and phosphorus-related parameters in water and wastewater processes. Common targets include ammonia, nitrate, nitrite, phosphate, and sometimes total nitrogen or related surrogates, depending on the method. These measurements translate complex biological and chemical dynamics into actionable signals for treatment optimization and compliance assurance.

The primary benefit is control of nutrient removal with improved stability and reduced operating cost. Real-time ammonia and nitrate trends enable aeration and carbon dosing to be matched to actual load rather than conservative setpoints, often reducing energy consumption while maintaining effluent limits. Continuous phosphate insight supports coagulant optimization and minimizes chemical overfeed and sludge production.

Measurement technologies vary to suit application needs. Ion-selective electrodes provide fast response for ammonia and nitrate in many wastewater matrices, while spectrometric methods (e.g., UV-based) can measure nitrate with minimal consumables. For low-level or highly regulated applications, wet-chemistry analyzers using colorimetric reactions provide high selectivity and traceability, albeit with reagent handling and routine maintenance requirements.

Successful deployment depends on sample representativeness, fouling control, and method alignment with the expected concentration range and interferences. Automatic cleaning, filtration, and defined calibration routines are commonly required in activated sludge environments. Diagnostics that track sensor slope, drift, and cleaning status help distinguish true process changes from instrument effects.

Typical applications include activated sludge basins, anoxic/anaerobic zones, sidestream treatment, tertiary polishing, and receiving water monitoring. Nutrient measurements also support process studies - quantifying diurnal load patterns, verifying control strategies, and documenting performance improvements after upgrades. With the right method selection and maintenance discipline, nutrient monitoring becomes a cornerstone for reliable biological nutrient removal and optimized chemical consumption.

Instrumentation and Controls., an exclusive authorized representative of sales and service for Endress+Hauser.