Eco-friendly Hydrophobic Epoxy - Fly Ash Coating to Prevent Fat, Oil and Grease Deposition in Sewers
DOI:
https://doi.org/10.33736/jaspe.12122.2026Keywords:
Coating, , FOG, Fly ash, Hydrophobicity, SewerAbstract
The deposition of fat, oil, and grease (FOG) from food service and residential sources in sewer pipes causes frequent blockages, sanitary sewer overflows (SSOs), and high maintenance costs, mainly due to saponification reactions that create calcium-based, insoluble materials (fatbergs). The aim of this study is to create an eco-friendly and low-cost hydrophobic coating by mixing locally available biomass fly ash with epoxy resin to reduce FOG adhesion in concrete sewer pipes. The specific objectives are: (1) to develop and characterize a novel fly ash - epoxy coating focusing on reduction in FOG deposition, and (2) to evaluate the coatings’ performance by comparing FOG deposit formation in concrete sewer pipes before and after coating application. This study presents an innovative, environmentally friendly coating material made with locally-sourced biomass-based fly ash to mitigate deposition of FOG in sewer pipes. This fly ash contains high silica (SiO₂) content that can contribute to increased hydrophobicity, reducing the odds of deposition of FOG. The coating is made by mixing fly ash particles less than 63 µm with clear epoxy sealer and ethanol. Coatings were prepared by varying fly ash content from 1 to 30 % (w/w%). Prepared solutions were applied to concrete/mortar paste substrates to evaluate the performance of each coating. Selected coatings after preliminary inspection were characterized using contact angle, sliding angle, scanning electron microscopy (SEM) imaging and energy-dispersed X-ray (EDX) spectroscopy. The coatings were subjected to 21 days of synthetic FOG wastewater treatment to simulate sewer conditions. The 5% of fly ash coating showed the highest contact angle, at 101.10, and FOG deposition was decreased by 48.5% compared to the uncoated sample. The results indicated that mixing epoxy with a lower amount (1% - 5%) of fly ash enhanced the coating’s hydrophobicity and demonstrated lower adhesion to FOG. By repurposing high-SiO₂ biomass fly ash waste, this method provides a sustainable and economically viable alternative to traditional FOG disposal practices, which can be used to address environmental waste disposal issues as well as the challenges associated with sewer infrastructure.
References
Sultana, N., Roddick, F., Jefferson, B., Gao, L., Bergmann, D., Papalois, J., Guo, M., Tzimourtas, K., Paramanik, B.K.. & Pramanik, B. K. (2024). Effectiveness of grease interceptors in food service establishments for controlling fat, oil and grease deposition in the sewer system. Science of the Total Environment, 912, 169441. https://doi.org/10.1016/j.scitotenv.2023.169441
Kusum, S. A., Pour-Ghaz, M., & Ducoste, J. J. (2020). Reducing fat, oil, and grease (FOG) deposits formation and adhesion on sewer collection system structures through the use of fly ash replaced cement-based materials. Water Research, 186, 116304. https://doi.org/10.1016/j.watres.2020.116304
Wallace, T., Gibbons, D., O'Dwyer, M., & Curran, T. P. (2017). International evolution of fat, oil and grease (FOG) waste management–A review. Journal of Environmental Management, 187, 424-435. https://doi.org/10.1016/j.jenvman.2016.11.003
Keener, K. M., Ducoste, J. J., & Holt, L. M. (2008). Properties influencing fat, oil, and grease deposit formation. Water Environment Research, 80(12), 2241-2246. https://doi.org/10.2175/193864708X267441
He, X., de los Reyes III, F. L., & Ducoste, J. J. (2017). A critical review of fat, oil, and grease (FOG) in sewer collection systems: Challenges and control. Critical Reviews in Environmental Science and Technology, 47(13), 1191-1217. https://doi.org/10.1080/10643389.2017.1382282
Wallace, T., Gibbons, D., O'Dwyer, M., & Curran, T. P. (2017). International evolution of fat, oil and grease (FOG) waste management–A review. Journal of Environmental Management, 187, 424-435. https://doi.org/10.1016/j.jenvman.2016.11.003
Husain, I. A., Alkhatib, M. A. F., Jammi, M. S., Mirghani, M. E., Zainudin, Z. B., & Hoda, A. (2014). Problems, control, and treatment of fat, oil, and grease (FOG): A review. Journal of Oleo Science, 63(8), 747-752. https://doi.org/10.5650/jos.ess13182
Zhang, L., De Schryver, P., De Gusseme, B., De Muynck, W., Boon, N., & Verstraete, W. (2008). Chemical and biological technologies for hydrogen sulfide emission control in sewer systems: A review. Water Research, 42(1-2), 1-12. https://doi.org/10.1016/j.watres.2007.07.013
Yusuf, H. H., Roddick, F., Jegatheesan, V., Gao, L., & Pramanik, B. K. (2023). Tackling fat, oil, and grease (FOG) build-up in sewers: Insights into deposit formation and sustainable in-sewer management techniques. Science of the Total Environment, 904, 166761. https://doi.org/10.1016/j.scitotenv.2023.166761
Yadav, S., & Pramanik, B. K. (2024). Novel hybrid coating material with triple distinct healing bond for fat oil and grease deposition control in the sewer system. Chemical Engineering Journal, 499, 156226. https://doi.org/10.1016/j.cej.2024.156226
Yadav, S., Mohana, A. A., Pramanik, S. K., & Pramanik, B. K. (2024). Novel hydrogen-bonded organic frameworks-based coating for fat oil and grease deposition control in the sewer system. Progress in Organic Coatings, 197, 108867. https://doi.org/10.1016/j.porgcoat.2024.108867
Allcock, H. R., Steely, L. B., & Singh, A. (2006). Hydrophobic and superhydrophobic surfaces from polyphosphazenes. Polymer International, 55(6), 621-625. https://doi.org/10.1002/pi.2030
Parkin, I. P., & Palgrave, R. G. (2005). Self-cleaning coatings. Journal of Materials Chemistry, 15(17), 1689-1695. https://pubs.rsc.org/en/content/articlelanding/2005/jm/b412803f/unauth
Boinovich, L. B., & Emelyanenko, A. M. (2008). Hydrophobic materials and coatings: Principles of design, properties and applications. Russian Chemical Reviews, 77(7), 583. DOI 10.1070/RC2008v077n07ABEH003775
Samadzadeh, M., Boura, S. H., Peikari, M., Kasiriha, S. M., & Ashrafi, A. (2010). A review on self-healing coatings based on micro/nanocapsules. Progress in Organic Coatings, 68(3), 159-164. https://doi.org/10.1016/j.porgcoat.2010.01.006
Ammar, S., Ramesh, K., Vengadaesvaran, B., Ramesh, S., & Arof, A. K. (2016). A novel coating material that uses nano-sized SiO2 particles to intensify hydrophobicity and corrosion protection properties. Electrochimica Acta, 220, 417-426. https://doi.org/10.1016/j.electacta.2016.10.099
Yan, Y. L., Cai, Y. X., Liu, X. C., Ma, G. W., Lv, W., & Wang, M. X. (2020). Hydrophobic modification on the surface of SiO2 nanoparticle: wettability control. Langmuir, 36(49), 14924-14932. https://doi.org/10.1021/acs.langmuir.0c02118
Kapridaki, C., & Maravelaki-Kalaitzaki, P. (2013). TiO2–SiO2–PDMS nano-composite hydrophobic coating with self-cleaning properties for marble protection. Progress in Organic Coatings, 76(2-3), 400-410. https://doi.org/10.1016/j.porgcoat.2012.10.006
Girón, R. P., Ruiz, B., Fuente, E., Gil, R. R., & Suárez-Ruiz, I. (2013). Properties of fly ash from forest biomass combustion. Fuel, 114, 71-77. https://doi.org/10.1016/j.fuel.2012.04.042
Chindaprasirt, P., Jitsangiam, P., Pachana, P. K., & Rattanasak, U. (2023). Self-cleaning superhydrophobic fly ash geopolymer. Scientific Reports, 13(1), 44.
https://doi.org/10.1038/s41598-022-27061-6
Krolczyk, J. B. (2016). The effect of mixing time on the homogeneity of multi-component granular systems. Transactions of FAMENA, 40(1), 45-56. https://hrcak.srce.hr/clanak/229037
Chindaprasirt, P., & Rattanasak, U. (2020). Fabrication of self-cleaning fly ash/polytetrafluoroethylene material for cement mortar spray-coating. Journal of Cleaner Production, 264, 121748. https://doi.org/10.1016/j.jclepro.2020.121748
Supit, S. W., Shaikh, F. U., & Sarker, P. K. (2014). Effect of ultrafine fly ash on mechanical properties of high volume fly ash mortar. Construction and Building Materials, 51, 278-286. https://doi.org/10.1016/j.conbuildmat.2013.11.002
Geyer, F., D’Acunzi, M., Sharifi-Aghili, A., Saal, A., Gao, N., Kaltbeitzel, A., Sloot, T-F., Berger, R., Butt, H.J., & Vollmer, D. (2020). When and how self-cleaning of superhydrophobic surfaces works. Science advances, 6(3), eaaw9727. https://doi.org/10.1126/sciadv.aaw9727
Forbes, P. (2008). Self-cleaning materials. Scientific American, 299(2), 88-95. https://www.jstor.org/stable/26000766
Sim, J., Kang, Y., Kim, B. J., Park, Y. H., & Lee, Y. C. (2020). Preparation of fly ash/epoxy composites and its effects on mechanical properties. Polymers, 12(1), 79. https://doi.org/10.3390/polym12010079
Hailemariam, B. Z., Yehualaw, M. D., Taffese, W. Z., & Vo, D. H. (2024). Optimizing alkali-activated mortars with steel slag and eggshell powder. Buildings, 14(8), 2336. https://doi.org/10.3390/buildings14082336
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