| Autor: |
He Shang, Qiyuan Gu, Cui Xinglan, Jiankang Wen, Xingyu Liu |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
IOP Conference Series: Earth and Environmental Science. 182:012012 |
| ISSN: |
1755-1315 |
| DOI: |
10.1088/1755-1315/182/1/012012 |
| Popis: |
This study evaluated the combined effect of six processing factors on Zn, Cd removal and sulfate reducing by sulfate reducing bacteria in a high concentration Zn-fed fixed bed bioreactor. Statistically valid Plackett Burman design of experiments was employed to carry out this study. The results obtained showed a high removal of Zn (99.63%), Cd (99.73%) at a maximum influent Zn concentration of 320 mg/L. Analysis of variance (ANOVA) of Zn and Cd removal revealed that the effect due to glycerol dosage and reflux ratio were highly significant (P value < 0.05). To establish the role of sulfate reducing bacteria (SRB) in the metal removal process, the characteristics of microbial community in fixed bed bioreactor was analyzed by High-throughput Sequencing during the steady operational process. The results obtained shows that the percentage of the dominant sulfate reducing bacteria in the sludge, such as Desulfovibrio, could reach 45.7%. Qualitative EDS analysis of the precipitate was performed. The results revealed that the precipitates as ZnS were confirmed by the EDS spectrum with strong peaks of zinc and sulfur. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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