Modeling of the denitrification/anaerobic digestion process of salmon fishery wastewater in a biofilm tubular reactor |
| |
Authors: | Huiliñir César Aspé Estrella Roeckel Marlene |
| |
Institution: | Department of Chemical Engineering, University of Santiago of Chile, Santiago, Chile. cesar.huilinir@usach.cl |
| |
Abstract: | The literature has paid scarce attention to the modeling of the denitrification-anaerobic digestion process in packed bed biofilm tubular reactors used to treat wastewater. The present study obtained a steady-state model for industrial salmon fishery wastewater treatment in a biofilm tubular reactor, including pH as a variable and the effect of biomass on hydrolysis. The axial profile of the reactor components and process efficiency were predicted with deviations below 6%. The optimal operating zone for the process was found at hydraulic retention time (HRT)>1.5d and inlet protein concentration (S(prot,0))<3000 mgTOCL(-1). Based on our results, we concluded that the removal of organic matter and nitrogen compounds depended mainly on HRT. The effluent pH was mainly affected by the C/N ratio, where a decrease increases pH. Organic matter removal was related with the anaerobic digestion process, while denitrification influenced mostly nitrate and nitrite removal. |
| |
Keywords: | Modeling Denitrification–anaerobic digestion pH Soluble proteins Upflow fixed-bed reactor |
本文献已被 ScienceDirect PubMed 等数据库收录! |