School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China.
School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China.
Bioresour Technol. 2018 Oct;265:340-348. doi: 10.1016/j.biortech.2018.06.040. Epub 2018 Jun 16.
The autotrophic removal of sulphate and nitrate in bioelectrochemical reactors was investigated at different external voltages (0.2, 0.4, 0.6, 0.8 and 1.0 V) under anaerobic conditions. Sulphate and nitrate removal, nitrite accumulation, reduction trend of nitrate and sulphate and microbial community structure were explored. Results indicate the highest removal efficiencies of nitrate and sulphate at 43.3 ± 2.8 and 7.1 ± 0.2 mg·l·d when the voltage is 0.6 V. Moreover, nitrite accumulation decreases with increased voltage from 0.2 V to 1.0 V. Illumina high-throughput sequencing results show similar richness and diversity of bacterial species with increased voltage from 0.2 V to 0.8 V. However, with further increased voltage to 1.0 V, bacterial diversity and richness decrease significantly. Overall, significant differences in community compositions are observed at different voltages.
在厌氧条件下，研究了不同外加电压（0.2、0.4、0.6、0.8 和 1.0 V）对生物电化学反硝化除硫酸盐和硝酸盐的影响。考察了硫酸盐和硝酸盐的去除、亚硝酸盐的积累、硝酸盐和硫酸盐的还原趋势以及微生物群落结构。结果表明，当电压为 0.6 V 时，硝酸盐和硫酸盐的去除效率最高，分别为 43.3±2.8 和 7.1±0.2 mg·l·d。此外，随着电压从 0.2 V 增加到 1.0 V，亚硝酸盐的积累减少。Illumina 高通量测序结果表明，随着电压从 0.2 V 增加到 0.8 V，细菌的丰富度和多样性相似。然而，当电压进一步增加到 1.0 V 时，细菌的多样性和丰富度显著下降。总的来说，在不同的电压下，群落组成存在显著差异。
