Enhanced chromium recovery and simultaneous sludge degradation in a novel bioelectrochemical system assembled with bio/abio-cathodes

Hang Yu; Qingliang Zhao; Xiaonan Liu; Fanchao Meng; Lingyu Ruan; Tiantian Sun; Weifeng Liu; Yimin Zhu; Wei Li; Fanyu Meng; Zhuyuan Liang

doi:10.1016/j.seppur.2020.117229

Enhanced chromium recovery and simultaneous sludge degradation in a novel bioelectrochemical system assembled with bio/abio-cathodes

Hang Yu
, Qingliang Zhao^*
, Xiaonan Liu
, Fanchao Meng
, Lingyu Ruan
, Tiantian Sun
, Weifeng Liu
, Yimin Zhu
, Wei Li
, Fanyu Meng
, Zhuyuan Liang

^*Corresponding author for this work

Dalian Maritime University
School of Environment, Harbin Institute of Technology
Harbin Medical University
CIFI GROUP

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

A novel five-chamber bioelectrochemical system (BES) consisting of bio/abio-cathodes and a precipitation chamber was constructed for enhanced chromium recovery with simultaneous sludge degradation. The results revealed that the BES obtained a Cr(VI) reduction efficiency of 99.93 ± 0.63% and collected 82.2 ± 4.2 mg precipitate/cycle on the bottom of the precipitation chamber instead of very little on the surface of the abio-cathode. Thus, it has the advantages of sustainably recycling more chromium and avoiding cleaning the cathode after every cycle. The Cr₂O₇²⁻ and HCrO₄⁻ were transformed into Cr³⁺, Cr(OH)²⁺, Cr₂(OH)⁴⁺, and Cr₃(OH)₄⁵⁺ and the precipitate that was mainly composed of Cr₂O₃ in the precipitation chamber ultimately. At the end of 147 h, the total chemical oxygen demand removal efficiency of the sludge was 9.37 ± 0.62%. The maximum power density of 3.68 ± 0.23 W/m³ was generated in the BES. This study provides an alternative technology to obtain a high rate of chromium recovery and synchronous sludge degradation.

Original language	English
Article number	117229
Journal	Separation and Purification Technology
Volume	250
DOIs	https://doi.org/10.1016/j.seppur.2020.117229
State	Published - 1 Nov 2020
Externally published	Yes

Keywords

Bioelectrochemical system
Chromium recovery
Electricity generation
Excess sludge
Transformation mechanism

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10.1016/j.seppur.2020.117229

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@article{19f1cb7e39594f819d404ff9b168a10d,

title = "Enhanced chromium recovery and simultaneous sludge degradation in a novel bioelectrochemical system assembled with bio/abio-cathodes",

abstract = "A novel five-chamber bioelectrochemical system (BES) consisting of bio/abio-cathodes and a precipitation chamber was constructed for enhanced chromium recovery with simultaneous sludge degradation. The results revealed that the BES obtained a Cr(VI) reduction efficiency of 99.93 ± 0.63\% and collected 82.2 ± 4.2 mg precipitate/cycle on the bottom of the precipitation chamber instead of very little on the surface of the abio-cathode. Thus, it has the advantages of sustainably recycling more chromium and avoiding cleaning the cathode after every cycle. The Cr2O72− and HCrO4− were transformed into Cr3+, Cr(OH)2+, Cr2(OH)4+, and Cr3(OH)45+ and the precipitate that was mainly composed of Cr2O3 in the precipitation chamber ultimately. At the end of 147 h, the total chemical oxygen demand removal efficiency of the sludge was 9.37 ± 0.62\%. The maximum power density of 3.68 ± 0.23 W/m3 was generated in the BES. This study provides an alternative technology to obtain a high rate of chromium recovery and synchronous sludge degradation.",

keywords = "Bioelectrochemical system, Chromium recovery, Electricity generation, Excess sludge, Transformation mechanism",

author = "Hang Yu and Qingliang Zhao and Xiaonan Liu and Fanchao Meng and Lingyu Ruan and Tiantian Sun and Weifeng Liu and Yimin Zhu and Wei Li and Fanyu Meng and Zhuyuan Liang",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = nov,

day = "1",

doi = "10.1016/j.seppur.2020.117229",

language = "英语",

volume = "250",

journal = "Separation and Purification Technology",

issn = "1383-5866",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Enhanced chromium recovery and simultaneous sludge degradation in a novel bioelectrochemical system assembled with bio/abio-cathodes

AU - Yu, Hang

AU - Zhao, Qingliang

AU - Liu, Xiaonan

AU - Meng, Fanchao

AU - Ruan, Lingyu

AU - Sun, Tiantian

AU - Liu, Weifeng

AU - Zhu, Yimin

AU - Li, Wei

AU - Meng, Fanyu

AU - Liang, Zhuyuan

PY - 2020/11/1

Y1 - 2020/11/1

N2 - A novel five-chamber bioelectrochemical system (BES) consisting of bio/abio-cathodes and a precipitation chamber was constructed for enhanced chromium recovery with simultaneous sludge degradation. The results revealed that the BES obtained a Cr(VI) reduction efficiency of 99.93 ± 0.63% and collected 82.2 ± 4.2 mg precipitate/cycle on the bottom of the precipitation chamber instead of very little on the surface of the abio-cathode. Thus, it has the advantages of sustainably recycling more chromium and avoiding cleaning the cathode after every cycle. The Cr2O72− and HCrO4− were transformed into Cr3+, Cr(OH)2+, Cr2(OH)4+, and Cr3(OH)45+ and the precipitate that was mainly composed of Cr2O3 in the precipitation chamber ultimately. At the end of 147 h, the total chemical oxygen demand removal efficiency of the sludge was 9.37 ± 0.62%. The maximum power density of 3.68 ± 0.23 W/m3 was generated in the BES. This study provides an alternative technology to obtain a high rate of chromium recovery and synchronous sludge degradation.

AB - A novel five-chamber bioelectrochemical system (BES) consisting of bio/abio-cathodes and a precipitation chamber was constructed for enhanced chromium recovery with simultaneous sludge degradation. The results revealed that the BES obtained a Cr(VI) reduction efficiency of 99.93 ± 0.63% and collected 82.2 ± 4.2 mg precipitate/cycle on the bottom of the precipitation chamber instead of very little on the surface of the abio-cathode. Thus, it has the advantages of sustainably recycling more chromium and avoiding cleaning the cathode after every cycle. The Cr2O72− and HCrO4− were transformed into Cr3+, Cr(OH)2+, Cr2(OH)4+, and Cr3(OH)45+ and the precipitate that was mainly composed of Cr2O3 in the precipitation chamber ultimately. At the end of 147 h, the total chemical oxygen demand removal efficiency of the sludge was 9.37 ± 0.62%. The maximum power density of 3.68 ± 0.23 W/m3 was generated in the BES. This study provides an alternative technology to obtain a high rate of chromium recovery and synchronous sludge degradation.

KW - Bioelectrochemical system

KW - Chromium recovery

KW - Electricity generation

KW - Excess sludge

KW - Transformation mechanism

UR - https://www.scopus.com/pages/publications/85086506131

U2 - 10.1016/j.seppur.2020.117229

DO - 10.1016/j.seppur.2020.117229

M3 - 文章

AN - SCOPUS:85086506131

SN - 1383-5866

VL - 250

JO - Separation and Purification Technology

JF - Separation and Purification Technology

M1 - 117229

ER -

Enhanced chromium recovery and simultaneous sludge degradation in a novel bioelectrochemical system assembled with bio/abio-cathodes

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Keywords

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