LAPSE:2022.0131
Published Article
LAPSE:2022.0131
Coupling Microbial Electrolysis Cell and Activated Carbon Biofilter for Source-Separated Greywater Treatment
Mayank Dhadwal, Yang Liu, Bipro Ranjan Dhar
November 6, 2022
Reclamation and reuse of wastewater are increasingly viewed as a pragmatic tool for water conservation. Greywater, which includes water from baths, washing machines, dishwashers, and kitchen sinks, is a dilute wastewater stream, making it an attractive stream for extraction of non-potable water. However, most previous studies primarily focused on passively aerated biological and physicochemical treatment processes for greywater treatment. Here, we investigated an integrated process of a microbial electrochemical cell (MEC) followed by granular activated carbon (GAC) biofilter for greywater treatment. The integrated system could achieve 99.3% removal of total chemical oxygen demand (TCOD) and 98.7% removal of the anionic surfactants (linear alkylbenzene sulphonates) from synthetic greywater at a total hydraulic residence time (HRT) of 25 h (1 day for MEC and 1 h for GAC biofilter). For one-day HRT, the maximum peak volumetric current density from MEC was 0.65 A/m3, which was comparable to that achieved at four-day HRT (0.66 A/m3). The adsorption by GAC was identified as a key mechanism for the removal of organics and surfactants. In addition, recirculation of liquid within the GAC biofilter was identified as a critical factor in achieving high-rate treatment. Although results indicated that GAC biofilter could be a standalone process for greywater, MEC can provide an opportunity for potential energy recovery from greywater. However, further studies should focus on developing high-rate MECs with higher energy recovery potential for practical operation.
Keywords
anionic surfactants, biofilter, granular activated carbon (GAC), greywater, microbial electrolysis cell
Subject
Suggested Citation
Dhadwal M, Liu Y, Dhar BR. Coupling Microbial Electrolysis Cell and Activated Carbon Biofilter for Source-Separated Greywater Treatment. (2022). LAPSE:2022.0131
Author Affiliations
Dhadwal M: Department of Civil and Environmental Engineering, University of Alberta; Edmonton, AB T6G 2R3, Canada
Liu Y: Department of Civil and Environmental Engineering, University of Alberta; Edmonton, AB T6G 2R3, Canada [ORCID]
Dhar BR: Department of Civil and Environmental Engineering, University of Alberta; Edmonton, AB T6G 2R3, Canada [ORCID]
Journal Name
Processes
Volume
9
Issue
2
First Page
281
Year
2021
Publication Date
2021-02-02
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr9020281, Publication Type: Journal Article
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LAPSE:2022.0131
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doi:10.3390/pr9020281
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Nov 6, 2022
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CC BY 4.0
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[v1] (Original Submission)
Nov 6, 2022
 
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Nov 6, 2022
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https://psecommunity.org/LAPSE:2022.0131
 
Original Submitter
Mina Naeini
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