首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Anammox for nitrogen removal from anaerobically pre-treated municipal wastewater: Effect of COD/N ratios on process performance and bacterial community structure
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Anammox for nitrogen removal from anaerobically pre-treated municipal wastewater: Effect of COD/N ratios on process performance and bacterial community structure

机译:厌氧厌氧处理厌氧预处理城市污水中脱氮:COD / N比对工艺性能和细菌群落结构的影响

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Long-term effects of COD/N ratios on the nitrogen removal performance and bacterial community of an anammox reactor were evaluated by adding a synthetic medium (with glucose) and real anaerobic effluent to a SBR. At a COD/N ratio of 2.8 (COD, 390 mg.L-1) ammonium removal efficiency was 66%, while nitrite removal remained high (99%). However, at a COD/N ratio of 5.0 (COD, 300 mg.L-1), ammonium and nitrite removal efficiencies were high (84% and 99%, respectively). High COD, nitrite, and ammonium removal efficiencies (80%, 90% and 95%, respectively) were obtained on adding anaerobically pre-treated municipal wastewater (with nitrite) to the reactor. DGGE revealed that the addition of anaerobic effluent changed the bacterial community structure and selected for DNA sequences related to Brocadia sinica and Chloroflexi. Adding glucose and anaerobic effluent increased denitrifiers concentration threefold. Thus, the possibility of using the anammox process to remove nitrogen from anaerobically pre-treated municipal wastewater was demonstrated. (C) 2016 Elsevier Ltd. All rights reserved.
机译:通过向SBR中添加合成培养基(含葡萄糖)和实际厌氧流出物,评估了COD / N比对厌氧反应器脱氮性能和细菌群落的长期影响。在2.8的COD / N比(COD,390 mg.L-1)下,铵的去除率为66%,而亚硝酸盐的去除率仍然很高(99%)。但是,在COD / N比为5.0(COD,300 mg.L-1)时,铵和亚硝酸盐的去除效率很高(分别为84%和99%)。通过将厌氧预处理的城市污水(含亚硝酸盐)添加到反应器中,可获得较高的COD,亚硝酸盐和铵去除效率(分别为80%,90%和95%)。 DGGE透露,添加厌氧性废水改变了细菌群落结构,并选择了与中华小花椰菜和Chloroflexi有关的DNA序列。添加葡萄糖和厌氧废水使反硝化剂的浓度增加了三倍。因此,证明了使用厌氧氨氧化工艺从厌氧预处理的城市废水中除去氮的可能性。 (C)2016 Elsevier Ltd.保留所有权利。

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