Abstract：
:The new-type electrolysis-integrated ecological floating beds (EEFBs) were set up to study their water removal ability due to the excellent water treatment capacity of electrolysis, this enhanced EEFBs were made of polyethylene filled with biochar substrate and in middle of the substrate placed the Mg-Al alloy served as anode and graphite served as cathode. The results show that removal rates of total nitrogen (TN), ammonia nitrogen (NH3-N), total phosphorus (TP) and phosphate (PO43--P) by the EEFBs increased 53.1%, 96.5%, 76.5% and 74.5%, respectively. The electrolysis reaction was the main pathway for TN and TP removals in the EEFBs. A higher concentration of hydrogen autotrophic denitrification bacteria was recorded in the substrate of the EEFBs than that in the traditional ecological floating beds (EFBs) (p < 0.05), suggesting that the electrolysis may have enhanced the NO3--N removal efficiency of the EEFBs by promoting the growth and reproduce of hydrogen autotrophic denitrification bacteria. The in-situ formation of Mg2+ and Al3+ ions from a sacrificial Mg-Al alloy anode, caused PO43--P and other suspended matter flocculation, improved phosphorus removal and simultaneously reduced turbidity. Thus, electrolysis-integrated ecological floating bed has high nitrogen and phosphorus removal potential in eutrophic water.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Yan C,Wang M,Ma T,Yang S,Kong M,Shen J,Yang L,Gao Ydoi
10.1038/s41598-020-64499-ysubject
Has Abstractpub_date
2020-05-06 00:00:00pages
7619issue
1issn
2045-2322pii
10.1038/s41598-020-64499-yjournal_volume
10pub_type
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