Characteristics and trihalomethane formation reactivity of dissolved organic matter in effluents from membrane bioreactors with and without filamentous bulking. (July 2016)

• Record Type: Journal Article
• Authors: Xia, Chufan; Ma, Defang; Gao, Baoyu; Hu, Xinxiao; Yue, Qinyan; Meng, Yingjie; Kang, Shuyu; Zhang, Bei; Qi, Yuanfeng
• Is Part Of: Bioresource technology. Volume 211(2016)
• Page Start: 183
• Page End: 189
• Publication Date: 2016-07
• Subjects: MBR -- Filamentous bulking -- Dissolved organic matter -- Chlorination -- Trihalomethanes; 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.2016.03.026
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Bulking sludge reduced chlorine reactivity, but increased bromine-containing THMs. Bulking sludge increased EfOM and the content of aromatic moieties DOM. Bulking sludge led to a higher proportion of high molecular weight EfOM. Bulking sludge led to a relatively high hydrophobicity. Bulking sludge increased simple aromatic protein, fulvic and humic acid-like. Abstract: In this study, synthetic wastewater was treated by two identical membrane bioreactors (MBRs): the normal sludge MBR (NS-MBR) and the bulking sludge MBR (BS-MBR). Effects of filamentous bulking on the characteristics and trihalomethane (THM) formation reactivity of MBR effluent dissolved organic matter (EfOM) were investigated. Filamentous sludge bulking had no significant influence on the regulated MBR effluent water quality except NO2 –N and NO3 –N. NS-MBR effluent had more low molecular weight (LMW) (<5 kDa) EfOM (92.43%) than BS-MBR (75.18%). About two-thirds of EfOM from BS-MBR were hydrophilic substances. On the contrary, EfOM from NS-MBR exhibited higher hydrophobicity. The ratio of polysaccharides and proteins in MBR effluents increased after filamentous bulking. There were more protein-like materials, fulvic acid-like and humic acid-like in BS-MBR EfOM. The THM formation reactivity of BS-MBR EfOM was 30.15% of NS-MBR EfOM, whereas BS-MBR EfOM exhibited higher formation reactivity of bromine containing species.