Simultaneous current generation and ammonia recovery from real urine using nitrogen-purged bioelectrochemical systems

Xiangtong Zhou, Youpeng Qu, Byung Hong Kim, Yue Du, Haiman Wang, Henan Li, Yue Dong, Weihua He, Jia Liu, Yujie Feng

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    Bioelectrochemical systems (BESs) offer a strategy for treating source-separated urine with current generation, but the high content of ammonia is still a challenge for sustainable maintenance of BESs due to ammonia inhibition. Therefore, an integrated BES setup was developed to overcome this problem by ammonia recovery. This setup, working in closed circuit mode with nitrogen purging (CN), allowed for the produced ammonia to be continuously channeled to an absorption bottle. In addition, control reactors in closed circuit (CC) or in open circuit mode (OC) were also run for comparison. A maximum power density of 310.9 ± 1.0 mW m<sup>-2</sup> was obtained for the CN reactor, and 127.1 ± 0.9 mW m<sup>-2</sup> was obtained for the CC reactor. Total nitrogen (TN) removal efficiency (84.9% ± 2.2%) from urine was considerably higher in the CN reactor than it was in the CC (29.7% ± 6.7%) or OC (30.0% ± 8.2%) reactor. In the CN reactor, 52.8% ± 3.6% of the TN was recovered in the form of NH<inf>3</inf>-N, with a NH<inf>3</inf> recovery rate of 435.7 ± 29.6 gN m<sup>-3</sup> d<sup>-1</sup>. The improved performance of the CN reactor was attributed to the mitigation of ammonia inhibition to the anode electro-activity. 16S rDNA sequencing showed that no Anammox and nitrifiers were detected on the anodes and cathodes. Overall, nitrogen purging provides the urine-fed BESs with a useful approach for maintaining the system performance by ammonia recovery.

    Original languageEnglish
    Pages (from-to)70371-70378
    Number of pages8
    JournalRSC Advances
    Volume5
    Issue number86
    DOIs
    Publication statusPublished - 3 Aug 2015

    Fingerprint

    Ammonia
    Nitrogen
    Recovery
    Networks (circuits)
    Purging
    Anodes
    Nitrogen removal
    Bottles
    Ribosomal DNA
    Cathodes

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Chemistry(all)

    Cite this

    Simultaneous current generation and ammonia recovery from real urine using nitrogen-purged bioelectrochemical systems. / Zhou, Xiangtong; Qu, Youpeng; Kim, Byung Hong; Du, Yue; Wang, Haiman; Li, Henan; Dong, Yue; He, Weihua; Liu, Jia; Feng, Yujie.

    In: RSC Advances, Vol. 5, No. 86, 03.08.2015, p. 70371-70378.

    Research output: Contribution to journalArticle

    Zhou, X, Qu, Y, Kim, BH, Du, Y, Wang, H, Li, H, Dong, Y, He, W, Liu, J & Feng, Y 2015, 'Simultaneous current generation and ammonia recovery from real urine using nitrogen-purged bioelectrochemical systems', RSC Advances, vol. 5, no. 86, pp. 70371-70378. https://doi.org/10.1039/c5ra11556f
    Zhou, Xiangtong ; Qu, Youpeng ; Kim, Byung Hong ; Du, Yue ; Wang, Haiman ; Li, Henan ; Dong, Yue ; He, Weihua ; Liu, Jia ; Feng, Yujie. / Simultaneous current generation and ammonia recovery from real urine using nitrogen-purged bioelectrochemical systems. In: RSC Advances. 2015 ; Vol. 5, No. 86. pp. 70371-70378.
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    AU - Li, Henan

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