Transformation and utilization of slowly biodegradable organic matters in biological sewage treatment of anaerobic anoxic oxic systems. (October 2016)

• Record Type: Journal Article
• Authors: Zhang, Q.H.; Jin, P.K.; Ngo, H.H.; Shi, X.; Guo, W.S.; Yang, S.J.; Wang, X.C.; Wang, X.; Dzakpasu, M.; Yang, W.N.; Yang, L.
• Is Part Of: Bioresource technology. Volume 218(2016)
• Page Start: 53
• Page End: 61
• Publication Date: 2016-10
• Subjects: Slowly biodegradable organic matters (SBOM) -- Carbon sources -- Anaerobic anoxic oxic (AAO) -- Dissolved organic matters (DOM); 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.2016.06.068
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: SBOM play a decisive role in sewage treatment plants. Anaerobic/anoxic effective controlling can enhance the conversion rate of SBOM. 65% SBOM can be transformed into more readily biologically utilizable substrates. Long hours of microbial reaction increased the micromolecular substances. Abstract: This study examined the distribution of carbon sources in two anaerobic anoxic oxic (AAO) sewage treatment plants in Xi'an and investigated the transformation characteristics and utilization potential of slowly biodegradable organic matters (SBOM). Results indicated under anaerobic and aerobic conditions, SBOM could be transformed at a rate of 65% in 8 h into more readily biologically utilizable substrates such as volatile fatty acids (VFAs), polysaccharides and proteins. Additionally, non-biodegradable humus-type substances which are difficult to biodegrade and readily accumulate, were also generated. These products could be further hydrolyzed to aldehyde and ketone compounds and then transformed into substances with significant oxygen-containing functional groups and utilized subsequently. The molecular weights of proteinoid substances had a wide distribution and tended to decrease over time. Long hours of microbial reaction increased the proportion of micromolecular substances. This particular increase generated significant bioavailability, which can greatly improve the efficiency of nitrogen removal.