Low temperature regenerated copolymerization doped environmentally available marine biowastes based ceramic membrane as efficient separator for bioelectrochemical systems (BESs).

Ceramic membranes based on naturally available materials are cost-effective and environmentally friendly alternatives to substitute Nafion™ 117 as separator in bioelectrochemical systems (BESs). In this study, copolymerization doped marine biomass-based (Ostrea gigas tnunb shell, OGTS; Sea sand, SS) ceramic membrane separators (CMSs) modified by Cu/Fe are synthesized by sintering. Modified CMSs exhibit superior chemical properties of acid and alkali resistance and thermodynamic stability. For CMS-ASO-Cu (CMS-Al 2 O 3 /SS/OGTS/Cu), Oxygen diffusion coefficient of 3.41 × 10−6 cm s−1 is 1.88 times higher than that of CMS-ASO-Fe (CMS-Al 2 O 3 /SS/OGTS/Fe). Proton transfer numbers of CMS-ASO-Cu is up to 0.62. Maximum power density 53.21 mW m−2 and current density 408.62 mA m−2 are achieved from CMS-ASO-Cu assisted BES, along with organic removal performance (COD >80%, NH 4 +-N > 80%, TP > 92%). Regeneration and antibacterial properties of the CMSs are confirmed by low-temperature sintering method and inhibition zone assay, ensuring the long-term, efficient and sustainable function of the C-BES. [Display omitted] • Copolymerization doped marine biowastes based ceramic membrane was synthesized. • Oxygen diffusion coefficient of CMS-ASO-Cu was 1.88 times of CMS-ASO-Fe. • Proton transfer numbers of CMS-ASO-Cu was up to 0.62. • Sustainable self-energy generation and organic removal were obtained in C-BES. • CMSs exhibited cyclic regeneration and antibacterial properties. [ABSTRACT FROM AUTHOR]