Dissolved oxygen is an important control parameter in wastewater treatment. It not only affects treatment efficiency, but also affects effluent quality and water reuse. Therefore, accurate measurement of dissolved oxygen concentrations is crucial. As a professional equipment for measuring dissolved oxygen, dissolved oxygen analyzers play an important role in sewage treatment.
Effect of dissolved oxygen on wastewater treatment
Microbial activity: Dissolved oxygen is necessary for microorganisms to carry out metabolic activities. The right amount of dissolved oxygen can ensure the activity of microorganisms and promote the decomposition and transformation of organic matter in sewage.
Precipitation effect: dissolved oxygen participates in the coagulation and sedimentation process, and promotes the sedimentation of suspended solids through redox reaction. High dissolved oxygen conditions help to improve the sedimentation effect and make the effluent clearer.
Phosphorus and nitrogen removal: In wastewater treatment, dissolved oxygen concentration is critical for phosphorus removal and denitrification processes. It affects the removal efficiency of phosphate, nitrate and other substances, and then affects the total nitrogen and total phosphorus of the effluent.
How a dissolved oxygen meter works
Dissolved oxygen analyzers typically use the electrode method or fluorescence method to measure the dissolved oxygen concentration. The electrode method is based on the principle of diffusion osmosis of oxygen, and the dissolved oxygen concentration is calculated by measuring the electrochemical reaction between the electrode and the water body. The fluorescence method uses a specific wavelength of light to excite a fluorescent substance in a body of water, and the dissolved oxygen value is calculated by measuring the fluorescence intensity.
Application of dissolved oxygen analyzer in sewage treatment
* Monitoring: The dissolved oxygen analyzer can monitor the dissolved oxygen concentration in the sewage treatment process in real time, provide accurate data reference for operators, and ensure that the treatment process is carried out under normal conditions.
Process control: Based on the real-time data provided by the dissolved oxygen analyzer, the operator can adjust the process parameters such as aeration volume and mixed liquid return flow to optimize the sewage treatment effect and reduce energy consumption.
Fault diagnosis and prevention: By monitoring abnormal changes in dissolved oxygen concentrations, potential problems in wastewater treatment facilities, such as aerator failures, pipeline leaks, etc., can be detected in time, which can help with preventive maintenance and reduce downtime.
Scientific research and optimization: Long-term monitoring of dissolved oxygen data can help researchers gain an in-depth understanding of the operating characteristics of wastewater treatment processes, and provide a scientific basis for process optimization and technological innovation.
Discharge up to standard: Accurate measurement of dissolved oxygen concentration is a key link to ensure that wastewater treatment meets discharge standards. By properly controlling dissolved oxygen levels, it helps to meet discharge standards and reduce the potential ecological impact on receiving water bodies.
Conclusion
In summary, dissolved oxygen analyzers play an important role in wastewater treatment, from real-time monitoring and process control to fault diagnosis and scientific research optimization.