Abstract:
:Sulfamethoxazole (SMX) pollution in wastewater threatens public health. A novel membrane bioelectrochemical reactor (MBER) with loop operation was developed for SMX degradation in low-C/N ratio wastewater. A gas-permeable silicone membrane module was used to precisely control the dissolved oxygen in the catholyte and save energy. Compared with a traditional membrane bioreactor (i.e., open-circuit reactor), the removal of SMX was increased from 49.91% to 71.10% in the proposed MBER (i.e., closed-circuit reactor). Sequencing analyses revealed that SMX was removed via cometabolism with NH4+-N and COD removal in both the anode and cathode chambers. Six intermediates were detected as degradation products in the cathodic effluent; these intermediates pose a similar potential threat to the environment as SMX. Two possible degradation pathways, deduced from the sequencing analyses and degradation products, were proposed. These results provide a new technology for improving SMX removal through the integration/coupling of bioelectrochemical technology into a membrane bioreactor.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Song HL,Lu YX,Yang XL,Xu H,Singh RP,Du KX,Yang YLdoi
10.1016/j.biortech.2020.123029subject
Has Abstractpub_date
2020-02-17 00:00:00pages
123029eissn
0960-8524issn
1873-2976pii
S0960-8524(20)30298-4journal_volume
305pub_type
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