In the modern water quality monitoring system, COD online analyzers have become the main equipment in the fields of industrial wastewater treatment, municipal water supply and environmental supervision due to their advantages of real-time monitoring, high precision and intelligence.
In the modern water quality monitoring system, COD online analyzers have become the main equipment in the fields of industrial wastewater treatment, municipal water supply and environmental supervision due to their advantages of real-time monitoring, high precision and intelligence. The COD online analyzer uses advanced potassium dichromate oxidation-spectrophotometry method, combined with a high-precision optical detection module, to achieve continuous monitoring of chemical oxygen demand (COD) in water. The measurement error is ≤±5%, and the data stability is better than the national standard requirements.
Municipal sewage treatment plant: intelligent control of the whole process
A city's sewage treatment plant introduced the COD online analyzer of Yoan Water Technology and deployed monitoring nodes at the water inlet, biochemical reaction tank and water outlet. The equipment achieves high-precision detection in the 0-5000mg/L range through the potassium dichromate oxidation method, with a data error of ≤±5%, and supports real-time uploading to the cloud platform over the 4G network.
Chemical Industry Park: Pollution Early Warning and Compliance Management
A fine chemical industry park introduced a UV spectroscopy COD online analyzer to implement 24-hour monitoring of the wastewater discharge outlets of pesticide and dye companies in the park. The equipment uses 254nm characteristic wavelength detection and can output results within 5 seconds, which is 300 times more efficient than traditional laboratory analysis methods.
Drinking water sources: building a risk prevention and control system
In a drinking water source protection zone of a certain reservoir, the management department deployed a monitoring system integrating COD and ammonia nitrogen parameters. The equipment adopts a separate dual-optical path design, which can simultaneously monitor COD (0-100mg/L) and ammonia nitrogen indicators. The data is transmitted to the municipal monitoring platform through the network. During the 2025 rainy season, the system detected an abnormal increase in COD values in the incoming tributaries to 72 mg/L (standard limit 50 mg/L), and the platform immediately pushed warning information to the emergency command center. By combining GIS map traceability, it was discovered that agricultural non-point source pollution in the upstream caused runoff to carry a large amount of organic matter into the lake. The management department immediately launched an emergency interception project and reduced the COD value to 45mg/L within 36 hours, ensuring the safety of drinking water for 300,000 residents.
The current COD online analyzer has achieved a leap from single detection to intelligent decision-making. For example, a sewage treatment plant established a COD value change prediction model by analyzing 3 years of historical data, which can predict water quality fluctuations 4 hours in advance, gaining valuable time for treatment process adjustments.
