A kinetic study of a membrane anaerobic reactor (MAR) for treatment of sewage sludge
Abdullah, Abdul Ghaniey Liew and Idris, Azni and Ahmadun, Fakhru'l-Razi and Baharin, Badlishah Sham and Emby, F. and Megat Mohd Noor, Megat Johari and Nour, A. H. (2005) A kinetic study of a membrane anaerobic reactor (MAR) for treatment of sewage sludge. Desalination, 183 (1-3). pp. 439-445. ISSN 0011-9164; ESSN: 1873-4464
The application of kinetic models (Monod, Contois and Chen & Hashimoto) and overall microbial kinetic on the membrane anaerobic reactor (MAR) for treatment of sewage sludge was investigated. The system consists of a cross-flow ultrafiltration membrane and six steady states were attained over a range of mixed liquor suspended solids of 12,760-21,800 mg/l. The results of all six steady states were successfully fitted above 98% for three known kinetics. The growth yield coefficient, Y, was found to be 0.74 gVSS/gCOD while the specific microorganism decay rate was 0.20 d-1. The k values were in the range of 0.350-0.519 gCOD/gVSS.d and μmax values were between 0.259 and 0.384 d-1. The COD removal efficiency was 96.5-99% with HRT of 7.8 days. The methane gas yield was between 0.19 l/g COD/d to 0.54 l/g COD/d when the organic loading rate increased from 0.1 kg COD/m3/d to 10 kg COD/m3/d. The system efficiency was greatly influenced by SRT and OLRs. Membrane flux rate deterioration was observed from 62.1 l/m2/h to 6.9 l/m2/h due to membrane fouling.
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