Performance and microbial diversity of an expanded granular sludge bed reactor for high sulfate and nitrate waste brine treatment

The disposal of waste brines has become a major challenge that hinders the wide application of ion- exchange resins in the water industry in recent decades. In this study, high sulfate removal efficiency （80%-90%） was achieved at the influent sulfate concentration of 3600 mg/L and 3% NaC1 after 145...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2014-04, Vol.26 (4), p.717-725
Main Authors: Liao, Runhua, Li, Yan, Yu, Xuemin, Shi, Peng, Wang, Zhu, Shen, Ke, Shi, Qianqian, Miao, Yu, Li, Wentao, Li, Aimin
Format: Article
Language:English
Subjects:
454-pyrosequencing
Bacteria
Bioreactors - microbiology
denitrification
expanded granular sludge bed (EGSB) reactor
Firmicutes
Microbial Consortia
Microorganisms
Nitrates
Nitrates - metabolism
Proteobacteria
Reactors
Salt water
Sludge
Sulfates
Sulfates - metabolism
waste brine
Waste Management
Wastes
微生物多样性
性能
盐水处理
硝酸盐
硫酸盐浓度
离子交换树脂
膨胀颗粒污泥床反应器
高硫酸盐
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Summary:The disposal of waste brines has become a major challenge that hinders the wide application of ion- exchange resins in the water industry in recent decades. In this study, high sulfate removal efficiency （80%-90%） was achieved at the influent sulfate concentration of 3600 mg/L and 3% NaC1 after 145 days in an expanded granular sludge bed （EGSB） reactor. Furthermore, the feasibility of treating synthetic waste brine containing high levels of sulfate and nitrate was investigated in a single EGSB reactor during an operation period of 261 days. The highest nitrate and sulfate loading rate reached 6.38 and 5.78 kg/（m3-day） at SO42--S/NO3-N mass ratio of 4/3, and the corresponding removal efficiency was 99.97% and 82.26% at 3% NaC1, respectively. Meanwhile, 454-pyrosequencing technology was used to analyze the bacterial diversity of the sludge on the 240th day for stable operation of phase X. Results showed that a total of 9194 sequences were obtained, which could be affiliated to 14 phyla, including Proteobacteria, Firmicutes, Chlorobi, Bacteroidetes, Synergistetes and so on. Proteobacteria （77.66%） was the dominant microbial population, followed by Firmicutes （12.23%） and Chlorobi （2.71%）.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(13)60479-9