Abstract：
:Using vertical flow constructed wetlands (VFCWs) with different influent wastewater volumes and feeding modes, this study aimed to identify the optimal operation strategy for dry seasons under wastewater deficiency. Using half the influent wastewater volume (HIWV) did not necessarily improve the removal efficiency (RE) of the chemical oxygen demand (COD), NH4+-N, NO3--N and total nitrogen. In the HIWV treatments, intermittent resting did not result in significantly different pollutant REs, whereas strategies involving partial saturation and prolongation of the hydraulic retention time (HRT) slightly decreased the pollutant REs compared with those obtained in the constant feeding mode. Of the three HIWV strategies, the intermittent resting mode achieved the highest anaerobic ammoxidation, the dominant pathway for nitrogen removal in the systems, and thus stimulated nitrogen transformation. The intermittent resting mode forms part of the recommended operation strategy for VFCWs in dry seasons with wastewater deficiency.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang M,Chen C,Zhou S,Yang J,Qiu H,Zhao D,An Sdoi
10.1016/j.biortech.2020.124049subject
Has Abstractpub_date
2020-12-01 00:00:00pages
124049eissn
0960-8524issn
1873-2976pii
S0960-8524(20)31321-3journal_volume
317pub_type
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