Layered structure of granules in upflow anaerobic sludge blanket reactor gives microbial populations resistance to metal ions

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Title
Layered structure of granules in upflow anaerobic sludge blanket reactor gives microbial populations resistance to metal ions
Author(s)
Jin-Woo Bae; Sung-Keun Rhee; S H Hyun; I S Kim; S T Lee
Bibliographic Citation
Biotechnology Letters, vol. 22, no. 24, pp. 1935-1940
Publication Year
2000
Abstract
Metal ions (Cd2+, Cu2+, Ni2+, Zn2+ and Cr3+) did not affect glucose degradation or the production of methane during anaerobic digestion with intact and disintegrated granules from a UASB (Upflow Anaerobic Sludge Blanket) reactor. However, when Cu2+ was at 500 mg g-1 VSS (volatile suspended solids) in the media, the glucose degradation rates and methane production rates decreased by 14% and 32% in disintegrated granules, respectively, whereas, in intact granules, decreases were 3% and 14%, respectively. When various electroplating metal ions were tested, 50% inhibition of acetate degradation and methane production were produced by 210-770 mg g-1 VSS and 120-630 mg g-1 VSS, respectively. The relative toxicity of the electroplating metals on methane production was in the order of Zn2+ (most toxic) > Ni2+ > Cu2+ > Cr3+ > Cd2+ (least toxic).
Keyword
Bacterial resistanceGranulesMetal ionsMethanogenUpflow anaerobic sludge blanket reactor
ISSN
0141-5492
Publisher
Springer
DOI
http://dx.doi.org/10.1023/A:1026760604796
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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