Coagulation and Chlorination of NOM and Algae in Water Treatment: A Review
International Journal of Environmental Monitoring and Analysis
Volume 2, Issue 6-1, December 2014, Pages: 23-34
Received: Aug. 30, 2014; Accepted: Oct. 6, 2014; Published: Oct. 15, 2014
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Authors
Djamel Ghernaout, Department of Chemical Engineering, College of Engineering, University of Ha’il, PO Box 2440, Ha’il, Saudi Arabia; Chemical Engineering Department, Saad Dahlab University of Blida, PO Box 270, Blida 09000, Algeria
Saad Moulay, Chemical Engineering Department, Saad Dahlab University of Blida, PO Box 270, Blida 09000, Algeria
Noureddine Ait Messaoudene, Department of Mechanical Engineering, College of Engineering, University of Ha’il, PO Box 2440, Ha’il, Saudi Arabia
Mohamed Aichouni, Department of Mechanical Engineering, College of Engineering, University of Ha’il, PO Box 2440, Ha’il, Saudi Arabia
Mohamed Wahib Naceur, Chemical Engineering Department, Saad Dahlab University of Blida, PO Box 270, Blida 09000, Algeria
Ahmed Boucherit, Chemical Engineering Department, Saad Dahlab University of Blida, PO Box 270, Blida 09000, Algeria
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Abstract
Due to health concerns of natural organic matter (NOM) and algae presence in surface water and difficulties encountered in their removal in the water treatment, this paper reviews coagulation and chlorination processes which are largely used in water treatment technology. In the conventional water treatment, coagulation and slow filtration treatments have better efficiency to reduce the NOM in water especially for the hydrophobic portion than the hydrophilic one. However, the pre-chlorination treatment for raw water has been proved to increase the dissolved organic carbon concentration due to the lysis of algae cells and disinfection by-products formation. The impact of water treatment processes on disinfection by-products formation remains complex and variable, as demonstrated by recent literature. It is concluded that no pre-, no inter-, only post-chlorination preceded by optimised coagulation for NOM and algae removal is the best available technology for the conventional water treatment which would be reinforced by at least adsorption on powdered activated carbon or nanofiltration in the short terms. Finally, the conventional water treatment will not remain a viable solution for drinking water from source waters containing NOM as their quality deteriorates and water quality standards become more difficult to achieve.
Keywords
Coagulation/Chlorination, Natural Organic Matter (NOM), Algae; Disinfection by-Products (DBPs), Water Treatment
To cite this article
Djamel Ghernaout, Saad Moulay, Noureddine Ait Messaoudene, Mohamed Aichouni, Mohamed Wahib Naceur, Ahmed Boucherit, Coagulation and Chlorination of NOM and Algae in Water Treatment: A Review, International Journal of Environmental Monitoring and Analysis. Special Issue:Environmental Science and Treatment Technology. Vol. 2, No. 6-1, 2014, pp. 23-34. doi: 10.11648/j.ijema.s.2014020601.14
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