利用聚己内酯和硫代硫酸盐双重电子供体高效去除硝酸盐的新型混养反硝化生物滤池。

IF 9.7 1区 环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2024-11-16 DOI:10.1016/j.biortech.2024.131836
Ruikang Wang, Wei Zeng, Haohao Miao, Qingteng Gong, Yongzhen Peng
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引用次数: 0

摘要

研究了一种以聚己内酯和硫代硫酸盐(MD-PT)为电子供体的新型混合反硝化生物滤池。MD-PT 的硝酸盐去除率高达 99.8%。MD-PT 的硝酸盐去除率达到 1820 g N/m3/d,比使用硫代硫酸盐的自养反硝化生物滤池(AD-T)高 304 g N/m3/d。MD-PT 中的自养和异养反硝化途径分别占硝酸盐去除量的 67.6%-94.5% 和 4.7-32.4%。MD-PT 的 SO42- 生成量低于 AD-T,出水 pH 值保持在 7.3 左右,无需酸碱中和。参与碳、氮和硫转化的关键基因的丰度得到提高,从而改善了 MD-PT 对硝酸盐的去除。添加聚己内酯后,与有机化合物降解相关的 Alicycliphilus 和 Simplicispira 得到了富集。这项研究为研究混养反硝化系统提供了新的视角。
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Novel mixotrophic denitrification biofilter for efficient nitrate removal using dual electron donors of polycaprolactone and thiosulfate.

A novel mixotrophic denitrification biofilter for nitrate removal using polycaprolactone and thiosulfate (MD-PT) as electron donors was investigated. MD-PT achieved high nitrate removal efficiency of approximately 99.8 %. The nitrate removal rates of MD-PT reached 1820 g N/m3/d, which was 304 g N/m3/d higher than that of autotrophic denitrification biofilter using thiosulfate (AD-T). Autotrophic and heterotrophic denitrification pathways in MD-PT were responsible for 67.6-94.5 % and 4.7-32.4 % of the nitrate removal, respectively. The production of SO42- in MD-PT was lower than that in AD-T, and the effluent pH was maintained at approximately 7.3 without acid-base neutralization. The abundance of key genes involved in carbon, nitrogen, and sulfur transformation was enhanced, which improved the nitrate removal of MD-PT. Alicycliphilus and Simplicispira related to organic compounds degradation were enriched after the addition of polycaprolactone. This research provided new insights into mixotrophic denitrification systems.

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来源期刊
Bioresource Technology
Bioresource Technology 工程技术-能源与燃料
CiteScore
20.80
自引率
19.30%
发文量
2013
审稿时长
12 days
期刊介绍: Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.
期刊最新文献
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