Upgrading methane fermentation of food waste by using a hollow fiber type anaerobic membrane bioreactor. (November 2018)

• Record Type: Journal Article
• Authors: Cheng, Hui; Hiro, Yutaka; Hojo, Toshimasa; Li, Yu-You
• Is Part Of: Bioresource technology. Volume 267(2018)
• Page Start: 386
• Page End: 394
• Publication Date: 2018-11
• Subjects: Anaerobic membrane bioreactor -- Hollow fiber membrane -- Food waste -- Methane fermentation -- Membrane fouling; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.07.045
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Methane fermentation of food waste was investigated by the HF-AnMBR. The optimal organic loading rate was 9.72 g-COD/L/d. Pore blocking played the most important role in membrane fouling. Significant improvement of methane production was achieved by the HF-AnMBR. Abstract: In this study, the effects of organic loading rates (OLRs) on anaerobic fermentation of food waste were comprehensively evaluated using a hollow fiber type anaerobic membrane bioreactor (HF-AnMBR). Compared to other OLRs, biogas production rate was highest at the OLR of 9.72 g-COD/L/d, the organic matter removal efficiency was also significantly higher and VFA was in lower concentration. COD conversion efficiency was as high as 92.9%, 85.3%, 82.6% and 80.4% at OLRs of 2.43, 4.86, 7.29 and 9.72 g-COD/L/d, respectively. The major membrane fouling was caused by organic pore blocking, accounting for 59.6% of the total hydraulic resistance after long-term operation. The performance of HF-AnMBR was compared with a continuously stirred tank reactor (CSTR) and a self-agitated reactor (SAR). The higher operation OLRs, COD conversion efficiency and better effluent quality achieved by the HF-AnMBR are evidences of a significant improvement in reactor performance compared to CSTR and SAR.