Yanji Sewage Treatment Project

Online Water Quality Monitoring for Wastewater Treatment

Online water quality monitoring for wastewater treatment is an essential means of ensuring that treated effluent meets discharge standards or reuse requirements. By continuously monitoring key water quality parameters in real time, the effectiveness of wastewater treatment can be effectively evaluated, process issues can be promptly identified and resolved, and environmental safety can be safeguarded.

Key Indicators

Physical Properties

Temperature: Affects microbial activity and chemical reaction rates.

Turbidity: Reflects the amount of suspended particulate matter in the water.

Chemical Properties

pH: Measures the acidity or alkalinity of water and is critical for biological treatment processes.

Dissolved Oxygen (DO): The amount of oxygen necessary to sustain aerobic microorganisms.

Chemical Oxygen Demand (COD): Represents the amount of oxygen consumed by an oxidant under specified conditions to oxidize organic matter in water, indirectly reflecting the concentration of organic pollutants.

Biochemical Oxygen Demand (BOD): The amount of dissolved oxygen required by microorganisms to decompose biodegradable organic matter over a specific period.

Ammonia Nitrogen: Measures the ammonia‑nitrogen content in wastewater; excessive levels may lead to eutrophication of water bodies.

Total Phosphorus and Total Nitrogen: Controlling these nutrients helps prevent eutrophication.

Biological Indicators

Coliform Count: Serves as an indicator of the presence of pathogenic microorganisms and is used to evaluate the sanitary quality of water.

Application Value

Improved Management Efficiency: Environmental protection authorities and facility managers can quickly understand the operational status of wastewater treatment facilities through online monitoring data and adjust operational strategies in a timely manner.

Optimized Treatment Processes: Based on real‑time feedback data, each treatment stage can be controlled more precisely, thereby enhancing overall treatment efficiency.

Prevention of Environmental Pollution: The early‑warning function helps prevent the occurrence of non‑compliant discharge events, protecting the surrounding ecosystem from contamination.