| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1055993 | Journal of Environmental Management | 2014 | 8 Pages |
•TOC removal in SWW was analyzed for combined biological treatment and AOPs.•Operating costs were evaluated for a slaughterhouse wastewater treatment model.•A cost-effectiveness analysis was executed at optimal conditions of each process.•Electricity costs, H2O2 consumption, and hydraulic retention time were optimized.•The combined ABR–AS–UV/H2O2 processes reached an optimum cost of $6.79/m3 day.
The objective of this study is to evaluate the operating costs of treating slaughterhouse wastewater (SWW) using combined biological and advanced oxidation processes (AOPs). This study compares the performance and the treatment capability of an anaerobic baffled reactor (ABR), an aerated completely mixed activated sludge reactor (AS), and a UV/H2O2 process, as well as their combination for the removal of the total organic carbon (TOC). Overall efficiencies are found to be up to 75.22, 89.47, 94.53, 96.10, 96.36, and 99.98% for the UV/H2O2, ABR, AS, combined AS–ABR, combined ABR–AS, and combined ABR–AS–UV/H2O2 processes, respectively. Due to the consumption of electrical energy and reagents, operating costs are calculated at optimal conditions of each process. A cost-effectiveness analysis (CEA) is performed at optimal conditions for the SWW treatment by optimizing the total electricity cost, H2O2 consumption, and hydraulic retention time (HRT). The combined ABR–AS–UV/H2O2 processes have an optimal TOC removal of 92.46% at an HRT of 41 h, a cost of $1.25/kg of TOC removed, and $11.60/m3 of treated SWW. This process reaches a maximum TOC removal of 99% in 76.5 h with an estimated cost of $2.19/kg TOC removal and $21.65/m3 treated SWW, equivalent to $6.79/m3 day.
