Cost-Effective Utilisation of Industrial Fly Ash Waste in Treatment of Domestic Wastewater
In the present research an economically effective porous fly ash-based filter candle (FFC) was developed for the treatment of domestic wastewater using fly ash, sodium silicate, wood dust, silica fume and water. The four testing specimens of FFC having different sizes (10, 20, 30, and 40 mm) were prepared. The parameters such as turbidity, total suspended solids (TSS), dissolved oxygen (DO), total dissolved solids (TDS), and pH of domestic wastewater were studied before and after treatment. The test results showed that there is a decrease in values of turbidity from 7 to 5.9 NTU, TSS from 300 to 218 mg/L, TDS from 400 to 302 mg/L, pH from 10.6 to 7.9, and BOD from 9.5 to 7.9 while DO values decreased in the range of 8.9 to 7.7. The observed porosity, compressive strength, and flow rate of FFC fall in the range of 24.55-27.26 %, 1.5-2.3 MPa, and 180-290 ml/h, respectively. The filtration tests using FFC exhibited good performance with >92 % filtration efficiency. Overall results have shown that FFC having a 30 mm bed thickness is recommendable for effective wastewater treatment. Thus, an attempt has been made to introduce a novel technology for domestic wastewater treatment using industrial fly ash waste.
Abdel-Raouf, N., Al-Homaidan, A.A. and I. Ibraheem (2012). Microalgae and wastewater treatment. Saudi Journal of Biological Sciences, 19(3): 257-275.
Ahmedi, F. and P. Pelivanoski (2013). A fly ash particles media filter for decentralized wastewater treatment systems. Water Practice and Technology, 8(3-4): 350-358.
Bandura, L., Panek, R., Madej, J. and W. Franus (2021). Synthesis of zeolite-carbon composites using high-carbon fly ash and their adsorption abilities towards petroleum substances. Fuel, 283: 119173.
Das, D. and N. Kayal (2021). Permeability and dust filtration behaviour of porous SiC ceramic candle filter. Materials Today: Proceedings, 39: 1235-1240. Gupta, S. and F. Bux (2019). Application of microalgae in wastewater treatment. Springer, Switzerland.
Han, S., Yue, Q., Yue, M., Gao, B., Li, Q., Yu, H., Zhao, Y. and Y. Qi (2009). The characteristics and application of sludge-fly ash ceramic particles (SFCP) as novel filter media. Journal of Hazardous Materials, 171(1-3): 809- 814.
He, X., Yao, B., Xia, Y., Huang, H., Gan, Y. and W. Zhang (2020). Coal fly ash derived zeolite for highly efficient removal of Ni2+ in waste water. Powder Technology, 367: 40-46.
Koshy, N. and D.N. Singh (2016). Fly ash zeolites for water treatment applications. Journal of Environmental Chemical Engineering, 4(2): 1460-1472.
Mushtaq,F., Zahid, M., Bhatti, I.A., Nasir, S. and T. Hussain (2019). Possible applications of coal fly ash in wastewater treatment. Journal of Environmental Management, 240: 27-46.
Sanas, M.V. and S.M. Gawande (2016). Fly ash using in wastewater treatment. International Journal of Emerging Engineering Research and Technology, 4(6): 11-14.
Saravanakumar, P., Gopalakrishnan, P., Sivakamidevi, M. and E.S. Archana (2019). Domestic wastewater treatment using fly ash as adsorbent. International Journal of Engineering and Advanced Technology, 8(5): 1465-1468.
Shah, S.F.A., Aftab, A., Soomro, N., Nawaz, M.S. and K. Vafai (2015). Waste water treatment-bed of coal fly ash for dyes and pigments industry. Pakistan Journal of Analytical & Environmental Chemistry, 16(2): 48-56.
Sukla, L.B., Subudhi, E. and D. Pradhan (eds.) (2019). The role of microalgae in wastewater treatment. Springer Nature: Singapore, pp. 129-135.
Supelano, G.I., Cuaspud, J.G., Moreno-Aldana, L.C., Ortiz, C., Trujillo, C.A., Palacio, C.A., Vargas, C.P. and J.M. Gómez (2020). Synthesis of magnetic zeolites from recycled fly ash for adsorption of methylene blue. Fuel, 263: 116800.
Visa, M. and A.M. Chelaru (2014). Hydrothermally modified fly ash for heavy metals and dyes removal in advanced wastewater treatment. Applied Surface Science, 303: 14-22.
Visa, M. (2016). Synthesis and characterization of new zeolite materials obtained from fly ash for heavy metals removal in advanced wastewater treatment. Powder Technology, 294: 338-347.