Open AccessMixed electron donor autotrophic denitrification processes for groundwater treatment by immobilized biological filters
Author(s) -
Junfeng Su,
Dong-hui Liang,
Ting-lin Huang,
Ting-ting Lian,
Wen-dong Wang
Publication year - 2017
Publication title -
water science and technology water supply
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 39
eISSN - 1607-0798
pISSN - 1606-9749
DOI - 10.2166/ws.2017.049
Subject(s) - electron donor , denitrification , electron acceptor , nitrate , chemistry , nuclear chemistry , acceptor , inorganic chemistry , analytical chemistry (journal) , nitrogen , environmental chemistry , catalysis , photochemistry , organic chemistry , physics , condensed matter physics
The immobilized biological filter (IBF) using Fe(II) and Mn(II) as mixed electron donor were elaborated for nitrate removal in groundwater. The single factor experiments of strain SZ28 under the conditions of electron donor:electron acceptor ratio (1:2, 1.45:1, 3:1), Fe(II):Mn(II) ratio (1:9, 3:7, 5:5), the results demonstrated that the highest nitrate removal ratio of nitrate was 100%, 49.6% (Mn(II)) and 100% (Fe(II)) under the conditions of electron donor:electron acceptor ratio of 3:1, Fe(II):Mn(II) ratio of 5:5. Mn(II) and Fe(II) as electron donor was tested the effects on denitrification in the IBF reactor. The optimal conditions was obtained at electron donor:electron acceptor ratio of 2:1, hydraulic retention time of 12 h and Fe(II):Mn(II) ratio of 5:5 with the highest removal ratio of nitrate-N (100%), Mn(II) (50.25%) and Fe(II) (99.2%). Results suggested that the optimal condition obtained from IBF was feasible.
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