Continuous nitrous oxide abatement in a novel denitrifying off-gas bioscrubber
Continuous nitrous oxide abatement in a novel denitrifying off-gas bioscrubber
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新型反硝化废气生物洗涤器中的连续一氧化二氮减排
DOI：
10.1007/s00253-014-6329-8
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发表时间：
2015
影响因子：
5
通讯作者：
R. Muñoz
中科院分区：
文献类型：
--
作者：
Osvaldo D. Frutos;Ilan A. Arvelo;Rebeca Pérez;G. Quijano;R. Muñoz
由填料床吸收柱耦合到搅拌槽脱氮生物反应器（STR）组成的生物洗涤器的潜力进行了评估95天的连续减排稀释的空气排放的N2 O在不同的液体循环速度。使用含有104 ± 12 ppmv的N2 O的合成空气排放物，在最高再循环速度（8 m h−1）和3 min的空床停留时间下实现了高达40 ± 1%的N2 O去除效率。N2 O在填充床柱中被吸收，并在STR中以> 80%的效率使用甲醇作为电子供体被进一步还原。长期运行表明，所建立的N2 O降解菌群不能利用N2 O作为氮源。额外的硝化试验表明，活性污泥作为接种物是不能好氧氧化N2 O硝酸盐或亚硝酸盐，无论测试的无机碳浓度。反硝化试验证实了非驯化活性污泥的能力，很容易以3.9毫克N2 O克VSS h-1的特定速率，使用甲醇作为电子供体的N2 O。据我们所知，这项研究构成了第一个系统的评估，连续减少N2 O的空气排放。通过DGGE测序对吸收柱中的微生物种群结构进行表征，结果表明微生物多样性较高，并且存在异养分解甲基营养菌。
The potential of a bioscrubber composed of a packed bed absorption column coupled to a stirred tank denitrification bioreactor (STR) was assessed for 95 days for the continuous abatement of a diluted air emission of N2O at different liquid recycling velocities. N2O removal efficiencies of up to 40 ± 1 % were achieved at the highest recirculation velocity (8 m h−1) at an empty bed residence time of 3 min using a synthetic air emission containing N2O at 104 ± 12 ppmv. N2O was absorbed in the packed bed column and further reduced in the STR at efficiencies >80 % using methanol as electron donor. The long-term operation of the bioscrubber suggested that the specialized N2O degrading community established was not able to use N2O as nitrogen source. Additional nitrification assays showed that the activated sludge used as inoculum was not capable of aerobically oxidizing N2O to nitrate or nitrite, regardless of the inorganic carbon concentration tested. Denitrification assays confirmed the ability of non-acclimated activated sludge to readily denitrify N2O at a specific rate of 3.9 mg N2O g VSS h-1 using methanol as electron donor. This study constitutes, to the best of our knowledge, the first systematic assessment of the continuous abatement of N2O in air emission. A characterization of the structure of the microbial population in the absorption column by DGGE-sequencing revealed a high microbial diversity and the presence of heterotrophic denitrifying methylotrophs.
伯杰系统细菌学手册第 3 卷
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Youichi Niimrua;Ken-ichiro Suzuki
通讯作者：
Ken-ichiro Suzuki
影响因子：
4.4
作者：
Miyahara, Morio;Kim, Sang-Wan;Shoun, Hirofumi
通讯作者：
Shoun, Hirofumi