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Seasonality distribution of the abundance and activity of nitrification and denitrification microorganisms in sediments of surface flow constructed wetlands planted with Myriophyllum elatinoides during swine wastewater treatment

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Jan 2018Publisher:Elsevier BVJournal:Bioresource Technology, volume 248, pages 89-97 (issn: 0960-8524,

Authors: Miaomiao Zhang; Feng Liu; Liang Chen; Yong Li; Jinshui Wu; Rulin Xiao; Xi Li; +1 Authors

doi: 10.1016/j.biortech.2017.06.102

pmid: 28673518

Seasonality distribution of the abundance and activity of nitrification and denitrification microorganisms in sediments of surface flow constructed wetlands planted with Myriophyllum elatinoides during swine wastewater treatment

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Abstract

Surface flow constructed wetlands (SFCWs) planted with Myriophyllum elatinoides for treatment of swine wastewater were examined to evaluate the effect of season, segment (site S1, S2, and S3), and treatment (100mgL-1 TN, T1; 300mgL-1 TN, T2; 500mgL-1 TN, T3) on the activity, and abundances of nitrifying and, denitrifying microorganisms, and on the abundance of sediment bacteria. The activity and abundances of nitrifiers, denitrifiers, and the abundance of bacteria were the highest in T3 samples, especially in S1 (P<0.05). The potential nitrification rate (PNR) was highest in the summer and potential denitrification rate (PDR) showed an increasing trend over seasons. The abundance of ammonia-oxidizing bacteria (AOB) was strongly correlated with PNR, while abundance of denitrifying gene (nirK) was strongly correlated with PDR. These results indicate that M. elatinoides SFCWs for swine wastewater treatment stimulate the growth of nitrifiers, denitrifiers and bacteria in sediments.

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