title: Substrate removal kinetics in high-rate upflow anaerobic filters packed with low-density polyethylene media treating high-strength agro-food wastewaters.
abstract: The process kinetics for two upflow anaerobic filters (UAFs) treating high strength fruit canning and cheese-dairy wastewaters as feed were investigated. The experimental unit consisted of a 10-L (effective volume) reactor filled with low-density polyethylene media. COD removal efficiencies of about 80% were recorded at the maximum OLRs of 19 and 17 g COD L(-1) d(-1) for the fruit canning and cheese-dairy wastewaters, respectively. Modified Stover-Kincannon and second-order kinetic models were applied to data obtained from the experimental studies in order to determine the substrate removal kinetics. According to Stover-Kincannon model, U(max) and K(B) values were estimated as 109.9 and 109.7 g L(-1) d(-1) for fruit canning, and 53.5 and 49.7 g L(-1) d(-1) for cheese dairy wastewaters, respectively. The second order substrate removal rate k(2(s)) was found to be 5.0 and 1.93 d(-1) respectively for fruit canning and cheese dairy wastewaters. As both these models gave high correlation coefficients (R(2) = 98-99%), they could be used in predicting the behaviour or design of the UAF.
authors.affiliation: Department of Civil Engineering, Indian Institute of Technology, Roorkee 247 667, Uttarakhand, India. rrajinime@yahoo.co.in
authors.forename: Rajinikanth
authors.initials: R
authors.lastname: Rajagopal
authors.forename: Michel
authors.initials: M
authors.lastname: Torrijos
authors.forename: Pradeep
authors.initials: P
authors.lastname: Kumar
authors.forename: Indu
authors.initials: I
authors.lastname: Mehrotra
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors / Q000382:microbiology*; D002611:Cheese; D005374:Filtration / Q000379:methods*; D007220:Industrial Waste / Q000517:prevention & control; D020959:Polyethylene / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D007220:Industrial Waste; D020959:Polyethylene