TY - JOUR
T1 - Long-term operation performance and fouling behavior of a high-solid anaerobic membrane bioreactor in treating food waste
AU - Cheng, Hui
AU - Li, Yemei
AU - Li, Lu
AU - Chen, Rong
AU - Li, Yu You
N1 - Funding Information:
This research was funded by the Japan Society for the Promotion of Science , Japan (JSPS, File NO. 18J11537).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/8/15
Y1 - 2020/8/15
N2 - A high-solid anaerobic membrane bioreactor (AnMBR) treating food waste was continuously operated to investigate AnMBR performance and membrane fouling behavior. The optimal methane yield of 0.57 ± 0.08 L-CH4/g-VSin and organic loading rate (OLR) of 6.00 ± 0.59 g-VS/L/d indicated that a high-rate methane fermentation of food waste was achieved by the AnMBR. The resistance-in-series (RIS) model was applied to delineate the resistances of different fouling fractions and elucidate fouling behavior under different filtration modes. The results showed that organic pore blocking was the dominant fouling at the low filtration to relaxation (F/R) ratio, accounting for 60% of the total resistance. By contrast, the cake layer governed the fouling when the F/R ratio became larger, accounting for 54% of the total resistance. To better understand membrane fouling behavior, the characteristics of cake sludge were investigated and compared with those of bulk sludge. Dissolved organic matter (DOM) analysis revealed that soluble microbial by-products played a comparably significant role as aromatic protein in membrane fouling in the high-solid AnMBR. This work provided a deep understanding of the membrane fouling behavior of a high-solid AnMBR in treating food waste and proposed the most appropriate membrane cleaning methods under different filtration modes, which is expected to contribute to the design, operation and further application of the high-solid AnMBR.
AB - A high-solid anaerobic membrane bioreactor (AnMBR) treating food waste was continuously operated to investigate AnMBR performance and membrane fouling behavior. The optimal methane yield of 0.57 ± 0.08 L-CH4/g-VSin and organic loading rate (OLR) of 6.00 ± 0.59 g-VS/L/d indicated that a high-rate methane fermentation of food waste was achieved by the AnMBR. The resistance-in-series (RIS) model was applied to delineate the resistances of different fouling fractions and elucidate fouling behavior under different filtration modes. The results showed that organic pore blocking was the dominant fouling at the low filtration to relaxation (F/R) ratio, accounting for 60% of the total resistance. By contrast, the cake layer governed the fouling when the F/R ratio became larger, accounting for 54% of the total resistance. To better understand membrane fouling behavior, the characteristics of cake sludge were investigated and compared with those of bulk sludge. Dissolved organic matter (DOM) analysis revealed that soluble microbial by-products played a comparably significant role as aromatic protein in membrane fouling in the high-solid AnMBR. This work provided a deep understanding of the membrane fouling behavior of a high-solid AnMBR in treating food waste and proposed the most appropriate membrane cleaning methods under different filtration modes, which is expected to contribute to the design, operation and further application of the high-solid AnMBR.
KW - AnMBR
KW - Food waste
KW - High-solid
KW - Membrane fouling behavior
KW - RIS model
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U2 - 10.1016/j.cej.2020.124918
DO - 10.1016/j.cej.2020.124918
M3 - Article
AN - SCOPUS:85082966918
VL - 394
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
M1 - 124918
ER -