title: Application of immobilized and granular dried anaerobic biomass for stabilizing and increasing anaerobic bio-systems tolerance for high organic loads and phenol shocks.
abstract: This study focuses on the stability and tolerance of continuous-flow bioreactors inoculated with anaerobic methanogens in three different configurations: (R1) dried granular biomass immobilized in PAC-enriched hydrophilic polyurethane foam, (R2) dried granular biomass, and (R3) wet granular biomass. These systems were tested under two different organic loading rates (OLR) of 6.25 and 10.94 (gCOD/(Lreactor∗d)), using a glucose-based synthetic mixture. The effect of an instantaneous shock load of phenol (5g/L for three days), and of phenol inclusion in the feed (0.5g/L) were also tested. At the lower OLR, all reactors performed similarly, however, increasing the OLR lead to a significant biomass washout and failure of R3. Biomass in R1 was more tolerant to phenol shock load than R2, though activity was recovered in both systems after about one month. PAC provided protection and shortened the adaptation time for 0.5g/L phenol that continuously was fed.
authors: Unit of Environmental Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev (BGU), Beer-Sheva, Israel; The Galilee Society Institute of Applied Research, Shefa-Amr, Israel.
authors: Nedal
authors: N
authors: Massalha
authors: Unit of Environmental Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev (BGU), Beer-Sheva, Israel.
authors: Asher
authors: A
authors: Brenner
authors: Chemical Engineering Department, Shenkar Engineering College, Ramat-Gan, Israel.
authors: Chaim
authors: C
authors: Sheindorf
authors: The Galilee Society Institute of Applied Research, Shefa-Amr, Israel; Prof. Ephraim Katzir Department of Biotechnology Engineering, Braude College, Karmiel, Israel. Electronic address: isabbah@gal-soc.org.
authors: Isam
authors: I
authors: Sabbah
mesh_terms: D000693:Anaerobiosis; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D018914:Cells, Immobilized / Q000187:drug effects* / Q000378:metabolism*; D019605:Euryarchaeota; D019800:Phenol / Q000494:pharmacology*; D011140:Polyurethanes
chemical_list: D011140:Polyurethanes; D019800:Phenol; C028279:polyurethane foam
keywords: Activated carbon; Anaerobic treatment; Immobilized biomass; Phenol; Polyurethane foam