Research Paper: Design and Development of Municipal Wastewater Treatment Systems by Fe(VI) and Computation of System’s Economic Navigation

Document Type : Original Articles


1 Department of Civil Engineering, Jami Institute of Technology, Isfahan, Iran.

2 Department of Chemical Engineering, Jami Institute of Technology, Isfahan, Iran.

3 Department of Chemical Engineering, Jami Institute of Technology, Isfahan, Iran



In spite of numerous studies on Fe(VI) capacity in treating wastewater, no equations are presented yet for the design of a Fe(VI) treatment facility. In most studies, Fe(VI) has been mentioned as the most effective substance for wastewater treatment; however, none is currently available about the operation costs in treatment facilities. This paper aims to introduce the necessary equations for the design and development of facilities that use Fe(VI) through the electrolysis methods and conduct the necessary calculations regarding its navigation costs. As the first step, a pilot plant test was conducted to find the basic information for municipal wastewater treatment by Fe(VI). Then, all the costs pertaining to electricity, acid and sodium hydroxide used in the treatment process were calculated to evaluate the total navigation costs. Our results indicates that treatment of every cubic meter of municipal wastewater would bear the following costs: US $1.17 for Fe(VI) production, US$ 2.52 for reducing the pH below 2 and US$ 146 for the production of 14 M sodium hydroxide solution. The overall costs for such facility would be equal to US$ 149.7. As it is demonstrated, the generation of 14 M sodium hydroxide solution is the most expensive element in the treatment process. It appears that the aforementioned cost is very high for the municipal treatment facilities; however, it might be appropriate for wastewaters that are resistant to biological methods. Nevertheless, more research is still needed to address this issue.


  1. Meraz KA, Vargas SM, Maldonado JT, Bravo JM, Guzman MT, Maldonado EA. Eco-friendly innovation for nejayote coagulation–flocculation process using chitosan: Evaluation through zeta potential measurements. Chemical Engineering Journal. 2016; 284:536-42. doi: 10.1016/j.cej.2015.09.026
  2. Talaiekhozani A, Salari M, Talaei MR, Bagheri M, Eskandari Z. Formaldehyde removal from wastewater and air by using UV, ferrate (VI) and UV/ferrate (VI). Journal of Environmental Management. 2016; 184:204-9. doi: 10.1016/j.jenvman.2016.09.084
  3. Ayekoe CY, Robert D, Lancine DG. Combination of coagulation-flocculation and heterogeneous photocatalysis for improving the removal of humic substances in real treated water from Agbô River (Ivory-Coast). Catalysis Today. 2017; 281:2-13. doi: 10.1016/j.cattod.2016.09.024
  4. Demirbas E, Kobya M. Operating cost and treatment of metalworking fluid wastewater by chemical coagulation and electrocoagulation processes. Process Safety and Environmental Protection. 2017; 105:79-90. doi: 10.1016/j.psep.2016.10.013
  5. Talaiekhozani A, Bagheri M, Talaei MR, Jaafarzadeh N. An overview on production and applications of ferrate (VI). Jundishapur Journal of Health Sciences. 2016; 8(3). doi: 10.17795/jjhs-34904
  6. Carvajal G, Roser DJ, Sisson SA, Keegan A, Khan SJ. Bayesian belief network modelling of chlorine disinfection for human pathogenic viruses in municipal wastewater. Water Research. 2017; 109:144-54. doi: 10.1016/j.watres.2016.11.008
  7. Talaiekhozani A, Bagheri M, Goli A, Khoozani MR. An overview of principles of odor production, emission, and control methods in wastewater collection and treatment systems. Journal of Environmental Management. 2016; 170:186-206. doi: 10.1016/j.jenvman.2016.01.021
  8. Vergara C, Muñoz R, Campos JL, Seeger M, Jeison D. Influence of light intensity on bacterial nitrifying activity in algal-bacterial photobioreactors and its implications for microalgae-based wastewater treatment. International Biodeterioration & Biodegradation. 2016; 114:116-21. doi: 10.1016/j.ibiod.2016.06.006
  9. Talaiekhozani A, Eskandari Z, Bagheri M, Talaie MR. Removal of H2S and COD by using UV, Ferrate and UV/Ferrate from municipal wastewater. Journal of Human, Environment and Health Promotion. 2016; 2(1):1-8.
  10. Rezania S, Ponraj M, Talaiekhozani A, Mohamad SE, Din MF, Taib SM, et al. Perspectives of phytoremediation using water hyacinth for removal of heavy metals, organic and inorganic pollutants in wastewater. Journal of Environmental Management. 2015; 163:125-33. doi: 10.1016/j.jenvman.2015.08.018
  11. Zheng L, Deng Y. Settleability and characteristics of ferrate (VI)-induced particles in advanced wastewater treatment. Water Research. 2016; 93:172-8. doi: 10.1016/j.watres.2016.02.015
  12. Manoli K, Nakhla G, Ray AK, Sharma VK. Enhanced oxidative transformation of organic contaminants by activation of ferrate (VI): Possible involvement of Fe V/Fe IV species. Chemical Engineering Journal. 2017; 307:513-7. doi: 10.1016/j.cej.2016.08.109
  13. Eskandari Z. [Control of hydrogen sulfide and organic compounds in municipal wastewater by using ferrate (VI) produced by electrochemical method (Prsian)] [MSc. thesis]. Isfahan: Jami Institute of Technology; 2016.
  14. Jiang JQ, Lloyd B. Progress in the development and use of ferrate (VI) salt as an oxidant and coagulant for water and wastewater treatment. Water Research. 2002; 36(6):1397-408. doi: 10.1016/s0043-1354(01)00358-x
  15. Homolkova M, Hrabak P, Graham N, Černik M. A study of the reaction of ferrate with pentachlorophenol–kinetics and degradation products. Water Science and Technology. 2017; 75(1):189-95. doi: 10.2166/wst.2016.496
  16. Minetti RC, Macaño HR, Britch J, Allende MC. In situ chemical oxidation of BTEX and MTBE by ferrate: pH dependence and stability. Journal of Hazardous Materials. 2017; 324:448-56. doi: 10.1016/j.jhazmat.2016.11.010