COD Analyzer and Control System

A COD analyzer and control system is an automated analytical instrument measuring chemical oxygen demand (COD) — the amount of oxygen required to chemically oxidise organic matter in water samples — enabling wastewater treatment plant operators to optimise biological treatment processes and verify effluent quality compliance with environmental discharge standards. The COD measurement approach provides objective quantification of organic contamination levels.

Premium COD analysers employ dichromate oxidation methodology where potassium dichromate oxidises organic compounds at elevated temperature (150°C) in acidic conditions, with unreacted dichromate measurement through titration or spectroscopy quantifying original organic concentration. Measurement range typically spans 5–2,000 mg/litre enabling assessment across untreated wastewater through treated effluent quality ranges. Analysis time typically spans 30–60 minutes per sample enabling multiple daily measurements guiding treatment process adjustments.

Integration with wastewater treatment control systems enables automated sampling, analysis execution, and real-time process adjustment — aeration rate modification, chemical coagulant dosing, or sludge recirculation — maintaining stable treatment performance despite inlet wastewater composition variations. Trending analysis identifies process degradation enabling preventive maintenance before environmental discharge violations occur.

Environmental compliance in Pakistan requires adherence to Pakistan Environmental Protection Agency (PEPA) discharge standards specifying maximum COD concentration in treated effluent — typically 100–200 mg/litre depending on receiving water body classification.

In Pakistan, COD analysers support municipal wastewater treatment and industrial facility compliance monitoring.

Tactical Supply Pakistan supplies COD analyzer and control systems for wastewater treatment and environmental compliance applications.