Browse > Article
http://dx.doi.org/10.4491/KSEE.2012.34.6.406

Effect of Fouling Reducing Additives on Membrane Filtration Resistance of Activated Sludge  

Chung, Tai Hak (Department of Civil & Environmental Engineering, Seoul National University)
Lee, Jong Hoon (Doosan Heavy Industries & Construction)
Kim, Hyoung Gun (Posco E&C Civil and Environment Division)
Bae, Young Kyoung (Department of Civil & Environmental Engineering, Seoul National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.34, no.6, 2012 , pp. 406-413 More about this Journal
Abstract
Effect of three additives, chitosan, ferric chloride, and MPE50 on membrane fouling reduction was studied. They were introduced with various dosing rate into activated sludge, and changes in filtration resistance measured by the batch cell filtration test were evaluated. Both the filtration resistance and the specific cake resistance were minimized at 20 mg/g-MLSS with chitosan, 70 mg/g-MLSS with ferric chloride, and 20 mg/g-MLSS with MPE50 addition, respectively. Introduction of the additives into the activated sludge resulted in reduction of not only cake resistance, but also fouling resistance. However, the chitosan addition to three different activated sludge resulted in three different optimal dose of 10, 20, 30 mg/g-MLSS, respectively. This implies that the optimal dose is dependent on sludge characteristics rather than a constant value. Overdose above the optimal dosage always aggravated filterability in all cases. Zeta potential of sludge flocs, relative hydrophobicity, floc size distribution, soluble EPS concentration and supernatant turbidity were measured in order to analyze fouling reduction mechanism. Nearly neutral surface charge along with the largest particle size was observed at the optimal dose. This could be explained by particle destabilization and restabilization mechanism as positively charged additives were injected into sludge flocs of negative surface charge. Both soluble EPS concentration and supernatant turbidity also showed the lowest value at the optimal dose. These foulants are believed to be coagulated and entrapped in sludge flocs during flocculation. Chitosan and MPE50 which are cationic polymeric substances showed higher reduction in both soluble EPS and fine particles comparing with ferric chloride.
Keywords
Filtration Resistance; Additives; Zeta Potential; Particle Size Distribution; Batch Cell Test;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Rosenberger S., Laabs C., Lesjean B., Gnirss R., Amy G., Jekel M. and Schrotter J.-C. "Impact of colloidal and soluble organic material on membrane performance in membrane bioreactors for municipal wastewater treatment," Water Res., 40(4), 710-720(2006).   DOI   ScienceOn
2 Lesjean B., Rosenberger S., Laabs C., Jekel M., Gnirss R. and Amy G., "Correlation between membrane fouling and soluble/colloidal organic substances in membrane bioreactors for municipal wastewater treatment," Water Sci. Technol., 51(6-7), 1-8(2005).
3 Zhang B., Yamamoto K., Ohgaki S. and Kamiko N., "Floc size distribution and bacterial activities in membrane separation activated sludge processes for small scale wastewater treatment/reclamation," Water Sci. Technol., 35(6), 37-44(1997).
4 Wisnieski C. and Grasmick A., "Floc size distribution in a membrane bioreactor and consequences for membrane fouling," Colloids Surf., 138, 403-411(1998).   DOI   ScienceOn
5 Masse A., Sperandio M. and Cabassud C., "Comparison of sludge characteristics and performance of a submerged membrane bioreactor and an activated sludge process at high solids retention time," Water Res., 40(12), 2405-2415(2006).   DOI   ScienceOn
6 Fang H. H. P., Shi X. and Zhang T., "Effect of activated carbon on fouling of activated sludge filtration," Desalination, 189(1-3) 193-199(2006).   DOI   ScienceOn
7 Wu J., Chen F., Huang X., Geng W. and Wen X., "Using inorganic coagulants to control membrane fouling in a submerged membrane bioreactor," Desalination, 197(1-3), 124-136(2006).   DOI   ScienceOn
8 Fan F., Zhou H. and Husain H., "Use of chemical coagulants to control fouling potential for wastewater membrane bioreactor processes," Water Environ. Res., 79(9), 952-957(2007).   DOI
9 Zhang H.-F., Sun B.-S., Zhao X.-H., and Gao Z.-H., "Effect of ferric chloride on fouling in membrane bioreactor," Sep. Purific. Technol., 63(2), 341-347(2008).   DOI   ScienceOn
10 Song K.-G., Kim Y. and Ahn K.-H., "Effect of coagulant addition on membrane fouling and nutrient removal in a submerged membrane bioreactor" Desalination, 221(1-3), 467-474(2008).   DOI   ScienceOn
11 Kawamura S., "Effectiveness of natural polyelectrolytes in water treatment," J. Am. Water Works Assoc., 83(10), 88-91(1991).
12 Divakaran R. and Sivasankara Pillai V. N., "Flocculation of kaolinite suspension in water by chitosan," Water Res., 35(16), 3904-3908(2001).   DOI   ScienceOn
13 Le Roux I., Krieg H. M., Yeates C. A. and Breytenbach J. C., "Use of chitosan as an antifouling agent in a membrane bioreactor," J. Membr. Sci., 248(1-2), 127-136(2005).   DOI   ScienceOn
14 Yoon S.-H. and Collins J. H., "A novel flux enhancing method for membrane bioreactor (MBR) process using polymer" Desalination, 191(1-3), 52-61(2006).   DOI   ScienceOn
15 Yoon S. H., Collins J, H., Musale D., Sundararajan S., Tsai S. P., Hallsby G. A., Kong J. F., Koppes J. and Cachia P., "Effect of flux enhancing polymer on the characteristics of sludge in membrane bioreactor process" Water Sci. Technol., 51(6-7), 151-157(2005).
16 Iversen V., Mohaupt J., Drews A., Lesjean B. and Kraume M., "Side effects of flux enhancing chemicals in membrane bioreactors (MBRs) : study on their biological toxicity and their residual fouling propensity" Water Sci. Technol., 57(1), 117-123(2008).   DOI   ScienceOn
17 Koseoglu H., Yigit N. O., Iversen V., Drews A., Kitis M., Lesjean B. and Kraume M., "Effect of several different flux enhancing chemicals on filterability and fouling reduction of membrane bioreactor (MBR) mixed liquor," J. Membr. Sci., 320, 57-64(2008).   DOI   ScienceOn
18 Hwang B.-K., Lee W.-N., Park P.-K., Lee C.-H. and Chang I-S., "Effect of membrane fouling reducer on cake structure and membrane permeability in membrane bioreactor" J. Membr. Sci., 288(1-2), 149-156(2007).   DOI   ScienceOn
19 Eusebio, R. C., Kim, H. G., Chung, T. H. and Kim, H. S., "Enhancing filterability of flat-sheet membrane by addition of cationic polymer for sludge thickening system," Desalination and Water Treatment, 17, 10-18(2010).   DOI
20 Rosenberg, M., Gutnick D. and Rosenberg E., "Adherence of bacteria to hydrocarbons: a simple method for measuring cell-surface hydrophobicity," FEMS Micorbiol. Lett., 9(1), 29-33(1980).   DOI
21 Chang I. S. and Lee C. H., "Membrane filtration characteristics in membrane coupled activated sludge system-The effect of physiological states of activated sludge on membrane fouling," Desalination, 120, 221-223(1998).   DOI   ScienceOn
22 Raunkjær K., T. Hvitved-Jacobsen and P. H. Nielsen, "Measurement of pools of protein, carbohydrate and lipid in domestic wastewater," Water Res., 28, 251-262(1994).   DOI   ScienceOn
23 Gaudy A. F., "Colorimetric determination of protein and carbohydrate," Ind. Wat. Wastes, 7, 17-22(1962).
24 Kwon D. Y., Vigneswaran S., Fane A. G. and Ben Aim R., "Experimental determination of critical flux in cross-flow microfiltration," Sep. Purific. Technol., 19, 169-181(2000).   DOI   ScienceOn
25 Meng, F., Zhang, H., Yang, F., Zhang, S., Li, Y. and Zhang, X., "Identification of activated sludge properties affecting membrane fouling in submerged membrane bioreactors," Sep. Purific. Technol., 51(1), 95-103(2006).   DOI   ScienceOn
26 Jin, B., Willen, B.-M. and Lant, P., "A Comprehensive insight into floc characteristics and their impact on compressibility and settleability of activated sludge," Chem. Eng. J., 95, 221-234(2003).   DOI   ScienceOn
27 Mikkelsen, L. H. and Keiding, K., "Physico-chemical characteristics of full scale sewage sludges with implications to dewatering," Water Res., 36, 2451-2462(2002).   DOI   ScienceOn
28 Goldberg, S., Doyle, R. J. and Rogenberg, M., "mechanism of enhancement of microbial cell hydrophobicity by cation polymers," J. Bacteriol., 172(10), 5650-5654(1990).   DOI