Assessing Coagulant Dosage in Full-Scale Drinking Water Treatment Plants Using Nephelometry

作者：Cheng Wen Po^*; Chen Ping Hung; Yu Ruey Fang; Chang Jen Neng

来源：Environmental Engineering Science, 2012, 29(3): 212-217.

DOI：10.1089/ees.2010.0477

• nephelometric turbidimeter monitoring system
• turbidity fluctuation
• standard deviation
• floc diameter
• flocculation

A nephelometric turbidimeter monitoring system (NTMS) was utilized to measure the standard deviation (SD) of turbidity of suspension solutions. Experimental results demonstrated that turbidity SD was consistent with the theory that underlay the "turbidity fluctuation technique.'' The NTMS was also used at a full-scale drinking water treatment plant to continuously monitor turbidity in all flocculation tanks. Experimental results revealed that under coagulant dosages of 0.33, 0.92, 1.67, and 2.67mg/L, turbidity SD was strongly correlated with floc diameter in the flocculation tank. Turbidity SD and floc diameter increased to their maximum values at a coagulant dosage of 0.92mg/L. This result suggested that turbidity SD obtained by using an NTMS could be used to determine the operational important parameters of water treatment plants.

• 出版日期2012-3