Nitrogen removal from temperate anaerobic-aerobic two-stage biological systems: impact of reactor type and wastewater strength

被引:5
|
作者
Eusebi, Anna L. [1 ,2 ]
Martin-Garcia, Nacho [1 ]
McAdam, Ewan J. [1 ]
Jefferson, Bruce [1 ]
Lester, John N. [1 ]
Cartmell, Elise [1 ]
机构
[1] Cranfield Univ, Cranfield Water Sci Inst, Cranfield MK43 0AL, Beds, England
[2] Univ Politecn Marche, Dept Sci & Engn Mat Rd Environm & Urban Planning, I-60100 Ancona, Italy
基金
英国工程与自然科学研究理事会;
关键词
anaerobic; wastewater; nitrification; energy; SUSTAINABLE ENERGY STRATEGY; CHEMICAL OXYGEN-DEMAND; ACTIVATED-SLUDGE; UASB REACTOR; PART I; DENITRIFICATION; DIGESTION; CLIMATES; UTILITY; SEWAGE;
D O I
10.1002/jctb.4102
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
BACKGROUNDThere is a need to examine the impact of anaerobic reactor type and wastewater strength on anaerobic-aerobic two-stage biological systems for temperate wastewater treatment An expanded granular sludge blanket reactor and an anaerobic membrane bioreactor for crude wastewater treatment with downstream aerobic biological treatment were studied together with increasing the organic concentration by fortifying the crude wastewater with primary sludge. RESULTSA chemical oxygen demand and ammonia compliant effluent was produced from the anaerobic-aerobic two-stage process. Due to the enhanced organics removal achieved by the membrane, a lower denitrification rate, k(d), was recorded for the anaerobic membrane bioreactor effluent treatment. However, the residual organic carbon in the anaerobic effluents from both the expanded granular sludge blanket reactor and the anaerobic membrane bioreactor treating crude wastewater was not of sufficient quality to support denitrification. Complete nitrification was achieved during downstream treatment of the fortified effluent. In addition, fortification increased k(d) to values analogous to exogenous carbon substrates. CONCLUSIONSIt is postulated that fortification currently presents the most sustainable strategy for anaerobic-aerobic two-stage biological systems due to a combination of enhanced methane production and denitrification. (c) 2013 Society of Chemical Industry
引用
收藏
页码:2107 / 2114
页数:8
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