An experimental model of COD abatement in MBBR based on biofilm growth dynamic and on substrates' removal kinetics - PubMed (original) (raw)
An experimental model of COD abatement in MBBR based on biofilm growth dynamic and on substrates' removal kinetics
Alessio Siciliano et al. Environ Technol. 2016 Aug.
Abstract
In this study, the performance of a lab-scale Moving Bed Biofilm Reactor (MBBR) under different operating conditions was analysed. Moreover, the dependence of the reaction rates both from the concentration and biodegradability of substrates and from the biofilm surface density, by means of several batch kinetic tests, was investigated. The reactor controls exhibited an increasing COD (Chemical Oxygen Demand) removal, reaching maximum yields (close to 90%) for influent loadings of up to12.5 gCOD/m(2)d. From this value, the pilot plant performance decreased to yields of only about 55% for influent loadings greater than 16 gCOD/m(2)d. In response to the influent loading increase, the biofilm surface density exhibited a logistic growing trend until reaching a maximum amount of total attached solids of about 9.5 g/m(2). The kinetic test results indicated that the COD removal rates for rapidly biodegradable, rapidly hydrolysable and slowly biodegradable substrates were not affected by the organic matter concentrations. Instead, first-order kinetics were detected with respect to biofilm surface density. The experimental results permitted the formulation of a mathematical model to predict the MBBR organic matter removal efficiency. The validity of the model was successfully tested in the lab-scale plant.
Keywords: Biofilm surface density; COD removal; MBBR; kinetic model; organic matter biodegradability.
Similar articles
- An integrated mathematical model for chemical oxygen demand (COD) removal in moving bed biofilm reactors (MBBR) including predation and hydrolysis.
Revilla M, Galán B, Viguri JR. Revilla M, et al. Water Res. 2016 Jul 1;98:84-97. doi: 10.1016/j.watres.2016.04.003. Epub 2016 Apr 6. Water Res. 2016. PMID: 27085154 - Dairy wastewater treatment in a moving bed biofilm reactor.
Andreottola G, Foladori P, Ragazzi M, Villa R. Andreottola G, et al. Water Sci Technol. 2002;45(12):321-8. Water Sci Technol. 2002. PMID: 12201118 - Treatment of domestic wastewater in an up-flow anaerobic sludge blanket reactor followed by moving bed biofilm reactor.
Tawfik A, El-Gohary F, Temmink H. Tawfik A, et al. Bioprocess Biosyst Eng. 2010 Feb;33(2):267-76. doi: 10.1007/s00449-009-0321-1. Epub 2009 Apr 30. Bioprocess Biosyst Eng. 2010. PMID: 19404682 - Comparison of the performance of MBBR and SBR systems for the treatment of anaerobic reactor biowaste effluent.
Comett-Ambriz I, Gonzalez-Martinez S, Wilderer P. Comett-Ambriz I, et al. Water Sci Technol. 2003;47(12):155-61. Water Sci Technol. 2003. PMID: 12926683 - Upflow anaerobic sludge blanket reactor--a review.
Bal AS, Dhagat NN. Bal AS, et al. Indian J Environ Health. 2001 Apr;43(2):1-82. Indian J Environ Health. 2001. PMID: 12397675 Review.
MeSH terms
LinkOut - more resources
Full Text Sources
Other Literature Sources
Miscellaneous