Removal of Effluent Organic Matter (EfOM) from Ubon Ratchathani University by Combined Coagulation Process and Nanofiltration Membrane
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Abstract
This research studied the application of combined coagulants and nanofiltration (NF) membrane for removing effluent organic matter (EfOM) from wastewater treatment system in Ubon Ratchathani University. The membrane sheets used were obtained from GE Water & Process Technologies (model HL4040HM). The filtration experiments were conducted using a dead-end filtration test cell. The factors studied include: (1) coagulant types such as aluminum sulfate and ferric chloride, (2) solution pH level ranging from 4 to 10 (3) coagulant concentrations from 10 to 50 mg/L and (4) EfOM concentrations from 5 to 15 mg/L. The filtration pressure was operated constant at 60 psi in the NF test cell. The experimental results showed that aluminum sulphate with pH of 10 was suitable to remove the highest turbidity rejection of 68.18%, while ferric chloride at a pH of 4 was effective in the highest turbidity removal of 75.69%. The concentration of both coagulants at 40 mg/L provided the highest organic rejection. For the result of combined coagulation process and NF, it was found that the increased EfOM concentrations at 5, 10 and 15 mg/L resulted in flux reduction throughout filtration period. The removal efficiencies of EfOM after the coagulation process were approximately 96.13%, 96.16% and 96.90%, respectively for the combined aluminum sulphate and NF membrane. and approximately 96.08%, 93.76% and 93.28%, respectively for the combined ferric chloride and NF membrane.
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Articles published in Journal of Industrial Technology Ubon Ratchathani Rajabhat University both hard copy and electronically are belonged to the Journal.
References
B. M. Watson and C. D. Hornburg, “Low-energy membrane nanofiltration for removal of color, organics, and hardness from drinking water supplies,” Desalination, vol. 72, no. 1-2, pp. 11-22, 1989.
C. Hofmancaris, W. Siegers, K. vandeMerlen, A. Deman, and J. Hofman, “Removal of pharmaceuticals from WWTP effluent: Removal of EfOM followed by advanced oxidation,” Chemical Engineering Journal, vol. 327, pp. 514-521, 2017.
C. Jarusutthirak, S. Mattaraj, and R. Jiraratananon, “Factors Affecting Nanofiltration Performances in Natural Organic Matter Rejection and Flux Decline,” Separation and Purification Technology, vol. 58, pp. 68-75, 2007.
H. Cho, H. Lee, and S. Lee, “Effect of flocculation conditions on membrane permeability in coagulation–microfiltration,” Desalination, vol. 191, no. 1-3, pp. 386-396, 2006.
T. Carroll, S. King, R. Gray, A. Bolto, and A. Booker, “The fouling of microfiltration membranes by NOM after coagulation treatment,” Water Research, vol. 34, no. 11, pp. 2861-2868, 2000.
E. Muthia, P. Amalia, R. Aulia, R. Erdina. M. Mahmud, A. Chairul, R. Raissa, Y. Dede Heri, and B. Muhammad, “Combination of Coagulation, Adsorption, and Ultrafiltration processes for organic matter removal from peat water,” Sustainability, vol. 14, no. 1, pp. 370, 2021.
K. Thongnaak, “Removal of natural organic matter as trihalomethane precursor in water supply system by chemical coagulation and flocculation: Case studies of Maklong River and Thachin River,” M.S. thesis, Department Environmental Science, Silpakorn University, Bangkok, Thailand, 2010.
N. Theanjit, “Removal of natural organic matter by combined coagulation and Reverse osmosis,” M.S. thesis, Department Environmental Engineering, Ubonratchathani University, Ubonratchathani, Thailand, 2014.
L. Sangho and L. Chung-Hak, “Effect of membrane properties and pretreatment on flux and NOM rejection in surface water nanofiltration,” Separation and Purification Technology, vol. 56, no. 1, pp. 1-8, 2007.
S. Hongchen, S. Jiahui, H. Yiliang, H. Juan, and C. Wenpo, “Natural organic matter removal and flux decline with charged ultrafiltration and nanofiltration membranes,” Journal of Membrane Science, vol. 376, no. 1-2, pp. 179-187, 2011.
E. Kilduff, S. Mattaraj, J. Sensibaugh, J. Pieracci, P. Yuan, and G. Belfort, “Modeling flux decline during nanofiltration of NOM with poly (arylsulfone) membranes modified using UV-assisted graft polymerization,” Environmental Engineering Science, vol. 19, no. 6, pp. 477-495, 2014.
M. Deepak, A. Sara, D. Ludovic, M. Shobha, L. Weiwei, and B. Kanagaratnam, “Removal of natural organic matter from surface water sources by nanofiltration and surface engineering membranes for fouling mitigation – A review,” Chemosphere, vol. 321, pp. 138070, 2023.
J. Pengkang, J. Xin, A. Bjerkelund, S. Osterhus, C. Wang, and L. Yang, “A study on the reactivity characteristics of dissolved effluent organic matter (EfOM) from municipal wastewater treatment plant during ozonation,” Water Research, vol. 88, no. 643-652, 2016.
N. Park, B. Kwon, S. Kim, and J. Cho, “Biofouling potential of various NF membranes with respect to bacteria and their soluble microbial products (SMP): characterizations, flux decline, and transport parameters,” Journal of Membrane Science, vol. 258, no. 1-2, pp. 43-54, 2005.
