Modeling methane production in anaerobic forward osmosis bioreactor using a modified anaerobic digestion model No. 1. (September 2018)

• Record Type: Journal Article
• Authors: Song, Young-Chae; Kim, Minseok; Shon, Hokyong; Jegatheesan, Veeriah; Kim, Suhan
• Is Part Of: Bioresource technology. Volume 264(2018)
• Page Start: 211
• Page End: 218
• Publication Date: 2018-09
• Subjects: Anaerobic membrane bioreactor (AnMBR) -- Anaerobic digestion -- Forward osmosis (FO) -- Methane production -- Inhibition; 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.2018.04.125
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: ADM1 is modified to compare the performance of CAD, AnMBR and AnFOMBR. Membranes integrated into anaerobic digester can increase SRT. Increased SRT in AnMBR enhances methane production up to 0.387 l/gCOD. Accumulated free ammonia possibly inhibits methane production in AnFOMBR. FO membranes with perfect nitrogen removal are not suitable for AnFOMBR. Abstract: Anaerobic membrane bioreactor (AnMBR) using microfiltration (MF) or ultrafiltration (UF) membranes was introduced to enhance poor biomass retention of conventional anaerobic digestion (CAD). Recently, forward osmosis (FO) membrane have been applied to AnMBR, which is called AnFOMBR. FO membrane assures not only high biomass retention but also high removal efficiency for low molecular weight (LMW) matters. Methane production rates in CAD, AnMBR, and AnFOMBR were compared using a modified IWA anaerobic digestion model No. 1 (ADM1) in this work. Accumulation of biomass in AnMBR/AnFOMBR results in enhanced biochemical reaction and gains more methane production. AnFOMBR may experience a significant inhibition by accumulated free ammonia and cations, although concentrated soluble substrates rejected by FO membrane are favorable for more methane production. Rejection rate of inorganic nitrogen is a key parameter to determine the inhibition in methane production of AnFOMBR.