A novel aerated surface flow constructed wetland using exhaust gas from biological wastewater treatment: Performance and mechanisms. (February 2018)

• Record Type: Journal Article
• Authors: Zhang, Xinwen; Hu, Zhen; Zhang, Jian; Fan, Jinlin; Ngo, Huu Hao; Guo, Wenshan; Zeng, Chujun; Wu, Yiwen; Wang, Siyuan
• Is Part Of: Bioresource technology. Volume 250(2018)
• Page Start: 94
• Page End: 101
• Publication Date: 2018-02
• Subjects: Surface flow constructed wetlands -- Intermittent aeration -- Exhaust gases -- Nitrogen transformation -- Odor; 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.2017.08.172
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Exhaust gas from biological wastewater treatment was introduced into SFCW. NH4 + -N and COD removal efficiencies were improved by 68.30 ± 2.06% and 73.92 ± 2.36%, respectively. Exhaust gas (including odor, N2 O and aerosol) were purified after passing SFCW. The microorganisms from SBR were introduced into SFCW by aerating with exhaust gas. Abstract: In this study, a novel aerated surface flow constructed wetland (SFCW) using exhaust gas from biological wastewater treatment was investigated. Compared with un-aerated SFCW, the introduction of exhaust gas into SFCW significantly improved NH4 + -N, TN and COD removal efficiencies by 68.30 ± 2.06%, 24.92 ± 1.13% and 73.92 ± 2.36%, respectively. The pollutants removal mechanism was related to the microbial abundance and the highest microbial abundance was observed in the SFCW with exhaust gas because of the introduction of exhaust gas from sequencing batch reactor (SBR), and thereby optimizing nitrogen transformation processes. Moreover, SFCW would significantly mitigate the risk of exhaust gas pollution. SFCW removed 20.00 ± 1.23%, 34.78 ± 1.39%, and 59.50 ± 2.33% of H2 S, NH3 and N2 O in the exhaust gas, respectively. And 31.32 ± 2.23% and 32.02 ± 2.86% of bacterial and fungal aerosols in exhaust gas were also removed through passing SFCW, respectively.