The huge difference between turbidity water quality tester and streaming current meter in coagulation and dosing system
Release time:2025.11.27
The huge difference between turbidity water quality tester and streaming current meter in coagulation and dosing system
Streaming current meter and turbidity meter both play an important role in water quality monitoring and water treatment control, but the streaming current meter has many advantages over the turbidity meter. The following is a detailed introduction for you:
Precision of dosing control
- Real-time reflection of charge changes: The streaming current meter mainly monitors the charge characteristics of colloidal particles in water, and can reflect the charge state of colloids in water in real time and directly. In the process of water treatment dosing, the purpose of adding coagulants is to neutralize the charge of colloids to achieve coagulation. The streaming current meter can accurately control the amount of coagulant added according to the charge change, so that the dosage is closer to the actual demand and avoid insufficient or excessive dosage of the agent.
- ·Turbidity response hysteresis: The turbidity meter measures the scattering and absorption of light by suspended particles in water, reflecting the number and size of particles in water. The change in turbidity is the final manifestation of a series of physical and chemical processes after dosing, and there is a certain hysteresis. When the turbidity changes significantly, the best time for dosing adjustment may have been missed, resulting in inaccurate dosing control.
Sensitivity to water quality changes
- Rapid response to water quality fluctuations: The flow current meter responds quickly to water quality changes and can capture instantaneous changes in raw water quality in a timely manner, such as seasonal changes in source water, sudden pollution, etc. Once the charge of the colloid in the water changes, the flow current meter can quickly detect and feedback to the dosing system, adjust the dosage in time, and ensure the stability of the water treatment effect.
- Turbidity is affected by many factors: The measurement results of the turbidity meter are affected by many factors, such as the shape, size, composition of particles in the water, and the scattering characteristics of light. Some tiny colloid particles may have little effect on turbidity, but they will affect the water treatment effect. Moreover, the turbidity meter cannot distinguish the charge properties of the colloid particles, cannot accurately reflect the coagulation state of the colloid, and is relatively less sensitive to water quality changes.
Scope of application
- Strong adaptability to complex water quality: When treating complex water quality or water sources containing multiple pollutants, the flow current meter can more accurately reflect the coagulation of the colloid, providing a reliable basis for dosing control. For example, for industrial wastewater containing a large amount of organic matter, microorganisms or other impurities, the flowing current meter can adjust the dosage according to the charge change to improve the treatment effect.
- Turbidity measurement limitations: The turbidity meter may not accurately reflect the water quality in some cases. For example, when there are dissolved organic matter or tiny colloidal particles in the water, the turbidity value may not change much, but these substances may affect the subsequent water treatment process. In addition, the measurement accuracy of the turbidity meter for low turbidity water may be limited to a certain extent.
Operating cost
- Saving the dosage of reagents: Since the flowing current meter can achieve accurate dosing, it avoids excessive dosing of reagents, thereby reducing the cost of reagents. In the long-term operation process, this can save a lot of reagent costs for water treatment plants.
- Turbidity control is prone to waste of reagents: Due to the hysteresis of its measurement and control, the turbidity meter often needs to over-dosage reagents in order to ensure the treatment effect, resulting in waste of reagents and increased operating costs
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