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The purification process was performed by passing wastewater on a titanium dioxide (TiO2)-coated surface, which is continuously activated by irradiation of ultraviolet light. To improve the yield of the process, ferric chloride (FeCl3) was used as a coagulation agent. The organic and inorganic compounds, as well as the microorganisms in the tannery wastewater media, were degraded through a photocatalytic process. The results revealed that total dissolved solids and total suspended solids contents were significantly decreased from 8,450 and 8,990 mg\u00b7L\u22121 to 4,032 and 4,127 mg\u00b7L\u22121, respectively. Furthermore, the chemical oxygen demand content of the sample was reduced from 370 to 50 mg\u00b7L\u22121 after the addition of 100 mL of FeCl3 and 4 h of treatment. The same results were observed for the elimination of sulfate and chromium ions, which led to a decline in electrical conductivity. This suggests that introducing 100 mL of FeCl3 as the coagulation agent and continuous treatment with photocatalityc set-up could be considered as an effective method for the purification of tannery wastewaters.<\/jats:p>","DOI":"10.2166\/wst.2021.164","type":"journal-article","created":{"date-parts":[[2021,4,28]],"date-time":"2021-04-28T23:13:52Z","timestamp":1619651632000},"page":"2732-2743","update-policy":"https:\/\/doi.org\/10.2166\/iwapcrossmarkpolicypage","source":"Crossref","is-referenced-by-count":9,"title":["Continuous photocatalytic set-up assisted with nano TiO2 plate for tannery wastewater treatment"],"prefix":"10.2166","volume":"83","author":[{"given":"Reza","family":"Shahbazi","sequence":"first","affiliation":[{"name":"Faculty of Mechanical Engineering-Energy Division, K.N. Toosi University of Technology, P.O. 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