Model-based evaluation of selenate and nitrate reduction in hydrogen-based membrane biofilm reactor

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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Model-based evaluation of selenate and nitrate reduction in hydrogen-based membrane biofilm reactor. / Chen, Xueming; Lai, Chun-Yu; Fang, Fang; Zhao, He-Ping; Dai, Xiaohu; Ni, Bing-Jie.

In: Chemical Engineering Science, Vol. 195, 2019, p. 262-270.

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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Chen, Xueming ; Lai, Chun-Yu ; Fang, Fang ; Zhao, He-Ping ; Dai, Xiaohu ; Ni, Bing-Jie. / Model-based evaluation of selenate and nitrate reduction in hydrogen-based membrane biofilm reactor. In: Chemical Engineering Science. 2019 ; Vol. 195. pp. 262-270.

Bibtex

@article{b27a5029c5574012a96349049e11e9b7,
title = "Model-based evaluation of selenate and nitrate reduction in hydrogen-based membrane biofilm reactor",
abstract = "A biofilm model was developed to describe the simultaneous NO3− and SeO42− reduction in a H2-based membrane biofilm reactor (MBfR). Model calibration and validation was conducted using the experimental data of a reported H2-based MBfR. With a good level of identifiability, the SeO42− affinity constant and the SeO32− affinity constant were estimated at 9.80 ± 0.51 g Se m−3 and 1.83 ± 0.38 g Se m−3, respectively. The model was then applied to evaluate the effects of key operating conditions on the single-stage H2-based MBfR and the role of reactor configuration through comparing two-stage to single-stage MBfR systems. The results showed that (i) high SeO42− or low NO3− concentration in the influent favored the growth of selenate-reducing bacteria (SeRB) and therefore benefited the Se removal, (ii) the influent dissolved oxygen slightly inhibited the Se removal through enhancing the aerobic microbial respiration on H2, (iii) the H2 supply should be controlled at a proper level to avoid SeRB suppression and H2 wastage, (iv) thin biofilm should be avoided to ensure a protected niche for SeRB and therefore a promising Se removal, and (v) the two-stage MBfR configuration offered relatively higher efficiency in removing Se and NO3− simultaneously under the same loading condition.",
keywords = "Hydrogen-based membrane biofilm reactor, Selenate, Nitrate, Mathematical modelling, Model calibration",
author = "Xueming Chen and Chun-Yu Lai and Fang Fang and He-Ping Zhao and Xiaohu Dai and Bing-Jie Ni",
year = "2019",
doi = "10.1016/j.ces.2018.11.032",
language = "English",
volume = "195",
pages = "262--270",
journal = "Chemical Engineering Science",
issn = "0009-2509",
publisher = "Pergamon Press",

}

RIS

TY - JOUR

T1 - Model-based evaluation of selenate and nitrate reduction in hydrogen-based membrane biofilm reactor

AU - Chen, Xueming

AU - Lai, Chun-Yu

AU - Fang, Fang

AU - Zhao, He-Ping

AU - Dai, Xiaohu

AU - Ni, Bing-Jie

PY - 2019

Y1 - 2019

N2 - A biofilm model was developed to describe the simultaneous NO3− and SeO42− reduction in a H2-based membrane biofilm reactor (MBfR). Model calibration and validation was conducted using the experimental data of a reported H2-based MBfR. With a good level of identifiability, the SeO42− affinity constant and the SeO32− affinity constant were estimated at 9.80 ± 0.51 g Se m−3 and 1.83 ± 0.38 g Se m−3, respectively. The model was then applied to evaluate the effects of key operating conditions on the single-stage H2-based MBfR and the role of reactor configuration through comparing two-stage to single-stage MBfR systems. The results showed that (i) high SeO42− or low NO3− concentration in the influent favored the growth of selenate-reducing bacteria (SeRB) and therefore benefited the Se removal, (ii) the influent dissolved oxygen slightly inhibited the Se removal through enhancing the aerobic microbial respiration on H2, (iii) the H2 supply should be controlled at a proper level to avoid SeRB suppression and H2 wastage, (iv) thin biofilm should be avoided to ensure a protected niche for SeRB and therefore a promising Se removal, and (v) the two-stage MBfR configuration offered relatively higher efficiency in removing Se and NO3− simultaneously under the same loading condition.

AB - A biofilm model was developed to describe the simultaneous NO3− and SeO42− reduction in a H2-based membrane biofilm reactor (MBfR). Model calibration and validation was conducted using the experimental data of a reported H2-based MBfR. With a good level of identifiability, the SeO42− affinity constant and the SeO32− affinity constant were estimated at 9.80 ± 0.51 g Se m−3 and 1.83 ± 0.38 g Se m−3, respectively. The model was then applied to evaluate the effects of key operating conditions on the single-stage H2-based MBfR and the role of reactor configuration through comparing two-stage to single-stage MBfR systems. The results showed that (i) high SeO42− or low NO3− concentration in the influent favored the growth of selenate-reducing bacteria (SeRB) and therefore benefited the Se removal, (ii) the influent dissolved oxygen slightly inhibited the Se removal through enhancing the aerobic microbial respiration on H2, (iii) the H2 supply should be controlled at a proper level to avoid SeRB suppression and H2 wastage, (iv) thin biofilm should be avoided to ensure a protected niche for SeRB and therefore a promising Se removal, and (v) the two-stage MBfR configuration offered relatively higher efficiency in removing Se and NO3− simultaneously under the same loading condition.

KW - Hydrogen-based membrane biofilm reactor

KW - Selenate

KW - Nitrate

KW - Mathematical modelling

KW - Model calibration

U2 - 10.1016/j.ces.2018.11.032

DO - 10.1016/j.ces.2018.11.032

M3 - Journal article

VL - 195

SP - 262

EP - 270

JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

ER -