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Membrane Water Treatment Volume 16, Number 1, January 2025 , pages 41-47 DOI: https://doi.org/10.12989/mwt.2025.16.1.041 |
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Effects of environmental factors on the algal organic matters produced by different algal species |
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Se-Hyun Oh, Jing Wang and Yunchul Cho
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| Abstract | ||
| Algal blooms due to global warming and eutrophication causes excessive algal organic matters (AOMs) which lead to operational problems in water treatment plant such as unpleasant tastes, odors, and precursors of disinfection by-products (DBPs). In this study, the effects of several environmental factors, including dissolved organic matter (DOM), pH, and suspended solids (SS), on the growth of three different algal species and their AOM production were investigated. The increase in DOM concentration accelerated the growth of all three algal species, including Anabaena sp., Oscillatoria sp., and Microcystis aeruginosa. Also, AOMs released by these species showed the increase with the DOM concentration. In the case of pH, the growth rates of all three algal species at pH 6.0 were lower than those at both pH 7.5 and 10. Additionally, all algal species under pH 6.0 condition entered the stationary phase earlier than the other pH conditions. An increase in SS concentration was found to negatively affect algal growth by blocking the light necessary for photosynthesis. These findings suggest that environmental factors such as pH, SS, and DOM influence algal-derived organic matters which can cause problems in the water treatment plants. Therefore, it is necessary to understand the physicochemical characteristics of aquatic ecosystem for effective AOM management. | ||
| Key Words | ||
| algal organic matter (AOM); DOM; pH; SS | ||
| Address | ||
| Se-Hyun Oh and Yunchul Cho: Department of Civil and Environmental Engineering, Daejeon University, 62 Daehak-ro, Dong-gu, Daejeon 34520, Republic of Korea Jing Wang: Research and Development Department, CanFit Resource Technologies Inc., 65 Fushi-Ro, Haidian District, Beijing, China | ||
