Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada.
Environ Technol. 2020 Nov;41(25):3354-3362. doi: 10.1080/09593330.2019.1609589. Epub 2019 May 5.
In-plant wastewater treatment strategies to deal with bypass wastewater in excess of plant capacity are critical in securing sustainable wastewater management. To address this issue, potassium ferrate(VI), which is a dual disinfectant and coagulant, is assessed in this study as the sole chemical applied to enhance the primary treatment of bypass wastewater. The effect of rapid mixing speed is investigated for the first time along with potassium ferrate(VI) dosage by means of central composite design and response surface methodology. (), Faecal Coliform (FC), Total Suspended Solids (TSS), and Orthophosphates ( ) were considered as the process responses. All responses other than showed good agreement between the observed and modelled values. While there was no point of maximum or minimum response for both and FC, whose removals were found to increase with the increase of both the mixing intensity and potassium ferrate(VI) dosages, TSS removal exhibited optimal responses. The effluent quality achieved by potassium ferrate(VI), as an independent treatment, can be sufficient for certain types of unrestricted and restricted irrigation reuse purposes suggested by World Health Organisation (WHO) reuse guidelines.
厂内废水处理策略对于应对超过工厂处理能力的旁路废水至关重要，以确保可持续的废水管理。为了解决这个问题，本研究评估了高铁酸钾（VI）作为唯一的化学物质，用于增强旁路废水的初级处理。通过中心复合设计和响应面法首次研究了快速混合速度和高铁酸钾（VI）剂量的影响。（）、粪大肠菌群（FC）、总悬浮固体（TSS）和正磷酸盐（）被视为工艺响应。除了和 FC 之外，所有的响应值与实测值和模型值都非常吻合。虽然 和 FC 的去除率都随着混合强度和高铁酸钾（VI）剂量的增加而增加，但并没有出现最大或最小响应点，而 TSS 的去除则表现出最佳的响应。高铁酸钾（VI）作为一种独立的处理方法，可以达到世界卫生组织（WHO）建议的某些不受限制和限制灌溉再利用用途的出水质量标准。
