Cost-effectiveness analysis of TOC removal from slaughterhouse wastewater using combined anaerobic-aerobic and UV/H2O2 processes.
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/m(3) 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/m(3) treated SWW, equivalent to $6.79/m(3) day.
Graduate Program in Environmental Applied Science and Management, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada.
Ciro Fernando
CF
Bustillo-Lecompte
Department of Chemical Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2K3, Canada. Electronic address: mmehrvar@ryerson.ca.
Mehrab
M
Mehrvar
Facultad de Ingeniería, Universidad de Cartagena, Centro - Cr6 No 36-100, Cartagena de Indias, Colombia.
Edgar
E
Quiñones-Bolaños
D000003:Abattoirs; D000332:Aerobiosis; D000693:Anaerobiosis; D019149:Bioreactors; D002244:Carbon / Q000378:metabolism; D003362:Cost-Benefit Analysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry; D010084:Oxidation-Reduction; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater; D014873:Water Pollutants / Q000737:chemistry / Q000378:metabolism / Q000528:radiation effects
D002244:Carbon; D006861:Hydrogen Peroxide; D016877:Oxidants; D062065:Wastewater; D014873:Water Pollutants
Activated sludge (AS); Advanced oxidation processes (AOPs); Cost-effectiveness analysis (CEA); Slaughterhouse wastewater (SWW); TOC; UV/H(2)O(2)