A full-scale UASB reactor for treatment of pig and cattle slaughterhouse wastewater with a high oil and grease content

Brazilian Journal of Chemical Engineering

L. A. S. Miranda²  J. A. P. Henriques²  L. O. Monteggia¹ 

[1] ,Federal University of Rio Grande do Sul Department of Biophysics Biotechnology CenterPorto Alegre RS ,Brazil

关键词: Anaerobic digestion;    Oil and grease;    Specific methanogenic activity;    UASB reactor;   

DOI  :  10.1590/S0104-66322005000400013

来源: SciELO

【 摘 要 】

This paper discusses the performance of an 800m³ full-scale UASB reactor in treating meat-packing plant and slaughterhouse effluents containing high concentrations of oil and grease (O&G) (413-645 mg/L), resulting in a COD/O&G ratio of 26-32%. Those macromolecules were considered responsible for the unbalance of the system resulting in a total washout of the biomass. The removal of O&G from the influent using a physicochemical system (coagulation-flocculation) improved the physical characteristics of the anaerobic sludge, controlling the biomass washout. Reactor performance was significantly improved when the COD/O&G ratio influent was maintained in the 10%. The COD and O&G removal rates obtained after implantation of the physicochemical system were 70-92% and 27-58%, respectively. The specific methanogenic activity (SMA) of the biomass shows towards a tendency stabilisation and adaptation to the substrate influent. Pretreatment of the influent allowed the maximum organic load to be increased (1.46 to 2.43 Kg COD/m³.d) and improved the quality of the effluent.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License