β Scribed by Heng Liang; Jun Nan; Xinxin Zhang; Zhonglin Chen; Jiayu Tian; Guibai Li
No coin nor oath required. For personal study only.
In recent years, algal blooms have occurred worldwide, and algaeβrich water often has adverse effects on water production. The technique of algae measurement is a critical issue for adjusting water treatment processes according to the numbers of algae cells. The algae particles in the water are generally 2β200 Β΅m in size with only a few smaller than 2 Β΅m. The traditional algae measuring method is by visual observation with an optical microscope. However, traditional visual observation often needs 48 h fixing time, which makes the measurement results lag behind the needs of water production. To solve the problem, this study employed onβline optical devices to improve the efficiency and accuracy of algae measurement. A photometric dispersion analyzer (PDA) and particle counting analyzer (PCA) were jointly utilized to monitor onβline the algae concentration in natural water. Algae cells can be classified by different sizes. It was found that there was good correlation between R^2^~PDA~ and total algae counts in water. The PCA could quantitatively characterize the algae counts and species distribution of dominant algae species in real water. PDA and PCA could be used jointly to define onβline the characteristics of real water containing mixed algae. Copyright Β© 2010 Society of Chemical Industry
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