Article ID Journal Published Year Pages File Type
679258 Bioresource Technology 2016 9 Pages PDF
Abstract
The differences between biofilm and suspended sludge (S-sludge) in extracellular polymeric substances (EPS), microbial activity, and microbial community in an anoxic-aerobic sequencing batch biofilm reactor (SBBR) at different concentrations of divalent cadmium (Cd(II)) were investigated. As the increase of Cd(II) concentration from 0 to 50 mg L−1, the specific ammonium oxidation rate (SAOR), specific nitrite oxidation rate (SNOR), and specific nitrate reduction rate (SNRR) of biofilm decreased from 4.85, 5.22 and 45 mg N g−1 VSS h−1 to 1.54, 2.38 and 26 mg N g−1 VSS h−1, respectively, and the SAOR, SNOR and SNRR of S-sludge decreased from 4.80, 5.02 and 34 mg N g−1 VSS h−1 to 1.46, 2.20 and 17 mg N g−1 VSS h−1, respectively. Biofilm had higher protein (PN) content in EPS than S-sludge. Contrast to S-sludge, biofilm could provide Nitrobacter vulgaris, beta proteobacterium INBAF015, and Pseudoxanthomonas mexicana with the favorable conditions of growth and reproduction.
Related Topics
Physical Sciences and Engineering Chemical Engineering Process Chemistry and Technology
Authors
, , , , , , ,