ZHANGYang,LILi,TONGYi-wei,et al.Influence of Particle Disturbances on Turbidity Measurements in Low Turbidity Water[J].China Water & Wastewater,2022,38(20):131-138.
Influence of Particle Disturbances on Turbidity Measurements in Low Turbidity Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第20期
Page:
131-138
Column:
Date of publication:
2022-10-17
- Keywords:
- turbidity; low turbidity water; pipe network water; desktop turbidity meter; disturbed turbidity; persistent turbidity
- Abstract:
- There is a large amount of low turbidity water (less than 0.5 NTU) in the urban water supply system from the product water of the waterworks to the terminal water. There are some problems when using a desktop turbidity meter to detect the low turbidity water, such as obvious data fluctuation and inconsistent manual reading methods, which makes the turbidity detection results of the water samples not comparable and is not good for comparative analysis. To solve this problem, a large number of turbidity measurement curves of this kind of low turbidity water were investigated, and the fluctuation law of the curves and the reasons were analyzed. Most turbidity measurement curves consisted of two stages, namely, the fluctuation stage and the steady stage. The two stages corresponded to the disturbed turbidity and the persistent turbidity. The precipitation characteristics of turbidity particles in water samples were the common reason for the fluctuation of turbidity measurement curve. Taking the persistent turbidity as the detection result reflected the turbidity of low turbidity water more accurately and made the data comparable and valuable in a wider range. To read the persistent turbidity, it is recommended to read the turbidity value of low turbidity water samples after 40 s or 60 s of sample placement in the instrument.
Last Update:
2022-10-17