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Title: | Removal of algae, and taste and odor compounds by a combination of Plant-Mineral Composite (PMC) coagulant with UV-AOPs: Laboratory and pilot scale studies | Authors: | Abrha, Y.W Kye, H Kwon, M Lee, D Kim, K Jung, Y Ahn, Y Kang, J.-W |
Issue Date: | 2018 | Citation: | Abrha, Y.W, Kye, H, Kwon, M, Lee, D, Kim, K, Jung, Y, Ahn, Y, Kang, J.-W (2018). Removal of algae, and taste and odor compounds by a combination of Plant-Mineral Composite (PMC) coagulant with UV-AOPs: Laboratory and pilot scale studies. Applied Sciences (Switzerland) 8 (9) : 1502. ScholarBank@NUS Repository. https://doi.org/10.3390/app8091502 | Rights: | Attribution 4.0 International | Abstract: | The seasonal occurrence of algae blooms in surface waters remains a common problem, such as taste and odor (T & Os), the risk of disinfection by-products (DBPs), and disturbance to water treatment systems. The coagulation efficiency of plant-mineral composite (PMC) coagulant followed by UV-based advanced oxidation processes (UV-AOPs; UV/H 2 O 2 and UV/Cl 2 ) was evaluated for removal of algae, turbidity, dissolved organic matters, and taste and odor compounds in lab-scale and pilot-scale tests. In the lab-scale test, coagulation process with 20 mg/L of PMC shows high removal efficiency of turbidity (94%) and algae (99%) and moderate removal efficiency of UV 254 (51%) and geosmin (46%). The pilot test results also show good removal efficiency of turbidity (64%), chlorophyll-a (96%). After PMC coagulation process, the major water factors, which affected the performance of UV-AOPs (i.e., UV transmittance (85-94%), and scavenging factor (64,998-28,516 s -1 )), were notably improved, and further degradation of geosmin and 2-methylisoborneol (2-MIB) was achieved in both lab-and pilot-scale tests of the UV-AOPs. The UV/H 2 O 2 process shows higher removal efficiency of geosmin and 2-MIB than the UV/Cl 2 process because of the pH effect. The results confirmed that the PMC-based coagulation followed by UV/H 2 O 2 process could be an effective process for the removal of algae, geosmin, and 2-MIB. © 2018 by the authors. | Source Title: | Applied Sciences (Switzerland) | URI: | https://scholarbank.nus.edu.sg/handle/10635/177841 | ISSN: | 20763417 | DOI: | 10.3390/app8091502 | Rights: | Attribution 4.0 International |
Appears in Collections: | Staff Publications Elements |
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