With the improvement of living standards, water pollution has become a growing concern. Ensuring water safety requires effective online water quality monitoring. This article explores key aspects of wastewater monitoring technologies:
- Monitoring Points
– Sampling Locations:
– Inlet: Monitor raw wastewater entering the treatment plant.
– Outlet: Track treated water before discharge.
– Equipment Installation:
– Deploy water quality analyzers and automatic metering devices at strategic points (e.g., outlets).
– Real-time data enables prompt issue detection and resolution.
- Monitoring Frequency
– Routine Checks: Urban treatment plants should conduct regular effluent testing.
– Seasonal Adjustments: Increase frequency during winter to account for reduced microbial activity and potential system inefficiencies.
– Customized Schedules: Tailor monitoring intervals based on plant capacity, pollutant load, and regulatory requirements.
- Monitoring Methods
– Chemical Oxygen Demand (COD):
– Measured via dilution-seeding method or spectrophotometry.
– Suspended Solids (SS):
– Analyzed using gravimetric methods (filtering, drying, and weighing residues).
– Oil and Grease:
– Quantified via infrared spectrophotometry (e.g., hexane extraction).
– pH:
– Monitored with pH meters or electrochemical sensors.
Key Takeaways
– Compliance Assurance: These methods ensure treated wastewater meets discharge standards (e.g., COD ≤100 mg/L, pH 6–9).
– Technology Integration: Combine automated analyzers (e.g., COD online monitors) with manual sampling for cross-validation.
– Case Study:
– A plant using IoT-enabled sensors reduced violations by 40% through real-time alerts for parameter spikes (e.g., ammonia >5 mg/L).
Example Monitoring Workflow:
- Sample Collection: Use auto-samplers at inlets/outlets.
- Lab Analysis: Validate COD/BOD with Hach kits or titration.
- Data Reporting: Integrate results into SCADA systems for regulatory submissions.
For advanced solutions, consider Hangzhou Modi–Tech product line:
– COD Online Analyzers
– Ammonia Nitrogen Monitors
– Turbidity Sensors
– Multi-Parameter Controllers
