A comprehensive study on algal-bacterial communities shift during thiocyanate degradation in a microalga-mediated process

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Changes in algal and bacterial communities during thiocyanate (SCN-) decomposition in a microalgamediated process were studied. Pyrosequencing indicated that Thiobacillus bacteria and Micractinium algae predominated during SCN- hydrolysis, even after its complete degradation. Principal components analysis and evenness profiles (based on the Pareto-Lorenz curve) suggested that the changes in the bacterial communities were driven by nitrogen and sulfur oxidation, pH changes, and photoautotrophic conditions. The populations of predominant microalgae remained relatively stable during SCN- hydrolysis, but the proportion of bacteria - especially nitrifying bacteria - fluctuated. Thus, the initial microalgal population may be crucial in determining which microorganisms dominate when the preferred nitrogen source becomes limited. The results also demonstrated that microalgae and SCN--hydrolyzing bacteria can coexist, that microalgae can be effectively used with these bacteria to completely treat SCN-, and that the structure of the algal-bacterial community is more stable than the community of nitrifying bacteria alone during SCN- degradation.
Publisher
ELSEVIER SCI LTD
Issue Date
2015-09
Language
English
Article Type
Article
Keywords

WASTE-WATER TREATMENT; ACTIVATED-SLUDGE; MICROBIAL COMMUNITY; CHLORELLA-VULGARIS; TREATMENT SYSTEMS; CARBONYL SULFIDE; GROWTH; DIVERSITY; PERFORMANCE; EFFLUENTS

Citation

BIORESOURCE TECHNOLOGY, v.191, pp.496 - 504

ISSN
0960-8524
DOI
10.1016/j.biortech.2015.03.136
URI
http://hdl.handle.net/10203/200607
Appears in Collection
CBE-Journal Papers(저널논문)
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