relation: https://khub.utp.edu.my/scholars/733/
title: Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor
creator: Zinatizadeh, A.A.L.
creator: Younesi, H.
creator: Bonakdari, H.
creator: Pirsaheb, M.
creator: Pazouki, M.
creator: Najafpour, G.D.
creator: Hasnain Isa, M.
description: Control and operation of a hybrid granular sludge reactor are mainly related to biological behavior of the granules under different process conditions. In this study, a 1-l digester was used to examine biological activity of the granules grown in a hybrid anaerobic reactor (AHR). The biogas production process was modeled and analyzed with three-process variables viz., influent COD (3000, 6500 and 10,000 mg COD/l), biomass concentration (2000, 4000 and 6000 mg VSS/l) and initial alkalinity (200, 1100 and 2000 mg CaCO3/l). Experiments were conducted based on a central composite face-centered design (CCFD) and analyzed using response surface methodology (RSM). In order to carry out a comprehensive analysis of the biogas production process, the indicative parameters viz., specific methanogenic activity (SMA), bicarbonate alkalinity produced-to-COD removed ratio, and COD removal were studied as the response. The maximum SMA was modeled to be 0.99 g CH4-COD/g VSS d under CODin, initial bicarbonate alkalinity (BA) and biomass concentrations of 10,000 mg COD/l, 2000 mg CaCO3/l and 2000 mg VSS/l, respectively, while the observed value was 1.039 g CH4-COD/g VSS d. The maximum COD removal was achieved at the condition when the influent COD was within the range of 4250-5250 mg/l and initial BA was more than 1100 mg CaCO3/l. Initial BA and CODin played an important role in the production of bicarbonate alkalinity during the digestion process. © 2008 Elsevier Ltd. All rights reserved.
date: 2009
type: Article
type: PeerReviewed
identifier:   Zinatizadeh, A.A.L. and Younesi, H. and Bonakdari, H. and Pirsaheb, M. and Pazouki, M. and Najafpour, G.D. and Hasnain Isa, M.  (2009) Effects of process factors on biological activity of granular sludge grown in an UASFF bioreactor.  Renewable Energy, 34 (5).  pp. 1245-1251.  ISSN 09601481     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-58649083454&doi=10.1016%2fj.renene.2008.10.013&partnerID=40&md5=8c6e18670a9593e4d89269f0e0cdacc7
relation: 10.1016/j.renene.2008.10.013
identifier: 10.1016/j.renene.2008.10.013