Autotrophic denitrification by nitrate-dependent Fe(II) oxidation in a continuous up-flow biofilter

被引：66
作者：
Zhou, Jun [1 ]
Wang, Hongyu [1 ]
Yang, Kai [1 ]
Ji, Bin [2 ]
Chen, Dan [1 ]
Zhang, Huining [1 ]
Sun, Yuchong [3 ]
Tian, Jun [4 ]
机构：
[1] Wuhan Univ, Sch Civil Engn, Wuhan 430072, Peoples R China
[2] Wuhan Univ Sci & Technol, Sch Urban Construct, Wuhan 430081, Peoples R China
[3] Northeast Elect Power Design Inst, Changchun 130000, Peoples R China
[4] Cent & Southern China Municipal Engn Design & Res, Wuhan 430010, Peoples R China
来源：
BIOPROCESS AND BIOSYSTEMS ENGINEERING | 2016年 / 39卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Continuous-upflow biofilter; Encrustation; Nitrate-dependent Fe(II) oxidation; Nitrate removal; IRON OXIDATION; FERROUS IRON; CELL ENCRUSTATION; REDUCING BACTERIA; MINERAL FORMATION; WASTE-WATER; STRAIN; 2002; REDUCTION; REMOVAL; TECHNOLOGY;
D O I：
10.1007/s00449-015-1511-7
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
A continuous-upflow biofilter packed with sponge iron was constructed for nitrate removal under an anaerobic atmosphere. Microbacterium sp. W5, a nitrate reducing and Fe(II) oxidizing strain, was added to the biofilter as an inoculum. The best results were achieved when NO3 (-)-N concentration was 30 mg/L and Fe2+ was 800 mg/L. Nitrite in influent would inhibit nitrate removal and aqueous Fe2+ resulted in encrustation. Fe(II)EDTA would prevent cells from encrustation and the maximum nitrogen removal efficiency was about 90 % with Fe(II)EDTA level of 1100 mg/L. Nitrate reduction followed first-order reaction kinetics. Characteristics of biofilms were analyzed by X-ray fluorescence spectroscopy.
引用
收藏
页码：277 / 284
页数：8
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