title: Toxic effect of sulfur compounds on anaerobic biogranule.
abstract: The effects of sulfide, sulfite and sulfate on degradation of volatile fatty acid (VFA) in UASB process have been studied by using serum bottle assay and septage-leachate acclimated biogranules. The relative toxicity of the compounds towards methane production and degradation of total VFA varied as SO(4)(2-) -S>S(2-)>SO(3)(2-) -S and SO(4)(2-) -S>SO(3)(2-) -S>S(2-), respectively. The difference of this order shows the importance of choosing monitoring factor in evaluating the effect of sulfur compounds on a UASB system. For the individual VFA the effects of sulfur compounds depended on the types of VFA. The VFA-degrading activity of anaerobic biogranules was decreased by 50% when 34, 26 and 20mg of S(2-), SO(3)(2-) -S and SO(4)(2-) -S were added to each gram of biomass, respectively. A comparison of the toxicity-resistance between two different anaerobic biogranules that acclimatized with septage-leachate mixture and septage was also made. In the presence of the leachate, the toxicity-resistance of biogranules was not weakened to sulfide and sulfate but was enhanced to sulfite.
authors.affiliation: Department of Hydraulic Engineering, Feng Chia University, 40724, ROC, Taichung, Taiwan. cylin@fcu.edu.tw
authors.forename: C Y
authors.initials: CY
authors.lastname: Lin
authors.forename: F Y
authors.initials: FY
authors.lastname: Chang
authors.forename: C H
authors.initials: CH
authors.lastname: Chang
mesh_terms: D001421:Bacteria, Anaerobic / Q000502:physiology*; D018533:Biomass; D005227:Fatty Acids / Q000378:metabolism; D008697:Methane / Q000032:analysis; D010316:Particle Size; D011157:Population Dynamics; D012037:Refuse Disposal; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D013457:Sulfur Compounds / Q000633:toxicity*; D014835:Volatilization
chemical_list: D005227:Fatty Acids; D012722:Sewage; D013457:Sulfur Compounds; D008697:Methane