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    A pilot-scale sulfur-based sulfidogenic system for the treatment of Cu-laden electroplating wastewater using real domestic sewage as electron donor.

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    Type
    Article
    Authors
    Li, Guibiao
    Liang, Zhensheng
    Sun, Jianliang
    Qiu, Yanying
    Qiu, Chuyin
    Liang, Xiaomin
    Zhu, Yuhang
    Wang, Peng cc
    Li, Yu
    Jiang, Feng cc
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Environmental Nanotechnology Lab
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Date
    2021-03-03
    Online Publication Date
    2021-03-03
    Print Publication Date
    2021-05
    Embargo End Date
    2023-03-11
    Submitted Date
    2020-10-22
    Permanent link to this record
    http://hdl.handle.net/10754/668204
    
    Metadata
    Show full item record
    Abstract
    Elemental sulfur (S0) reduction process has been demonstrated as an attractive and cost-efficient approach for metal-laden wastewater treatment in lab-scale studies. However, the system performance and stability have not been evaluated in pilot- or large-scale wastewater treatment. Especially, the sulfide production rate and microbial community structure may significantly vary from lab-scale system to pilot- or large-scale systems using real domestic sewage as carbon source, which brings questions to this novel technology. In this study, therefore, a pilot-scale sulfur-based sulfidogenic treatment system was newly developed and applied for the treatment of Cu-laden electroplating wastewaters using domestic sewage as carbon source. During the 175-d operation, >99.9% of Cu2+ (i.e., 5580 and 1187 mg Cu/L for two types of electroplating wastewaters) was efficiently removed by the biogenic hydrogen sulfide that produced through S0 reduction. Relatively high level of sulfide production (200 mg S/L) can be achieved by utilizing organics in raw domestic sewage, which was easily affected by the organic content and pH value of the domestic sewage. The long-term feeding of domestic sewage significantly re-shaped the microbial community in sulfur-reducing bioreactors. Compared to the reported lab-scale bioreactors, higher microbial community diversity was found in our pilot-scale bioreactors. The presence of hydrolytic, fermentative and sulfur-reducing bacteria was the critical factor for system stability. Accordingly, a two-step ecological interaction among fermentative and sulfur-reducing bacteria was newly proposed for sulfide production: biodegradable particulate organic carbon (BPOC) was firstly degraded to dissolved organic carbon (DOC) by the hydrolytic and fermentative bacteria. Then, sulfur-reducing bacteria utilized the total DOC (both DOC degraded from BPOC and the original DOC present in domestic sewage) as electron donor and reduced the S0 to sulfide. Afterwards, the sulfide precipitated Cu2+ in the post sedimentation tank. Compared with other reported technologies, the sulfur-based treatment system remarkable reduced the total chemical cost by 87.5‒99.6% for the same level of Cu2+ removal. Therefore, this pilot-scale study demonstrated that S0 reduction process can be a sustainable technology to generate sulfide for the co-treatment of Cu-laden electroplating wastewater and domestic sewage, achieving higher Cu2+removal and higher cost-effectiveness than the conventional technologies.
    Citation
    Li, G., Liang, Z., Sun, J., Qiu, Y., Qiu, C., Liang, X., … Jiang, F. (2021). A pilot-scale sulfur-based sulfidogenic system for the treatment of Cu-laden electroplating wastewater using real domestic sewage as electron donor. Water Research, 195, 116999. doi:10.1016/j.watres.2021.116999
    Sponsors
    The authors acknowledge the support from the National Natural Science Foundation of China (No. 51978289 and 51638005).
    Publisher
    Elsevier BV
    Journal
    Water research
    DOI
    10.1016/j.watres.2021.116999
    PubMed ID
    33714911
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S0043135421001974
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.watres.2021.116999
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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