Diversity and dynamic response of anaerobic ammonia oxidation granular sludge

IF 5.9 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Jiahong Ye , Xiang Li , Yan Yuan , Yayi Wang , Yong Huang , Jun Ma , Han Wang , Pengze Dang , Pei-ling Xu
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引用次数: 0

Abstract

Red anaerobic ammonia oxidation (Anammox) granular sludge (AnGS) has been reported in successfully operating Anammox systems, and its color is associated with sludge activity. However, in long-term operating systems, AnGS exhibits different sensory colors, physical structures, community structures, and denitrification performance, but the relationship between them has not yet been elucidated. The AnGS of the Anammox system, which has been in operation for more than a decade, can be divided into two main categories: red and white. The specific Anammox activity (SAA) in conventional red AnGS increased continuously as the particle size increased from <0.51 mm to 6.02 ± 0.84 mm. The SAA of white AnGS were slightly lower than those of red AnGS with similarly-size granules but significantly higher than AnGS with smaller red granules. Compared with red AnGS, the extracellular polymeric substances of white AnGS were significantly reduced, mainly due to the higher intracellular iron content, resulting in lower heme c concentration. Thus, heme c may prove not to be an evaluative tool for measuring Anammox activity. Red and white AnGS, whether through self-aggregation or adsorption by hydroxyl apatite and other carriers, will face the fate of internal voids during particle size growth. White AnGS exhibited a more complex microbial community than red AnGS. Candidatus Brocadia was abundant in red AnGS and the abundance increased with increasing granule size. Candidatus Kuenenia and Candidatus Jettenia made significant contributions to denitrification in white AnGS. This study provides a new perspective on particle selection for anammox engineering applications.

Abstract Image

厌氧氨氧化颗粒污泥的多样性和动态响应
据报道,在成功运行的厌氧氨氧化(Anammox)系统中,颗粒污泥(AnGS)呈红色,其颜色与污泥活性有关。然而,在长期运行的系统中,颗粒污泥的感官颜色、物理结构、群落结构和反硝化性能各不相同,但它们之间的关系尚未阐明。运行了十多年的 Anammox 系统的 AnGS 可分为两大类:红色和白色。传统红色 AnGS 的特定 Anammox 活性(SAA)随着粒径从 0.51 毫米增加到 6.02 ± 0.84 毫米而持续增加。白色 AnGS 的 SAA 略低于颗粒大小相似的红色 AnGS,但明显高于红色颗粒较小的 AnGS。与红色 AnGS 相比,白色 AnGS 的细胞外聚合物质明显减少,这主要是由于细胞内铁含量较高,导致血红素 c 浓度较低。因此,血红素 c 可能并不是衡量 Anammox 活性的评价工具。红色和白色 AnGS,无论是通过自我聚集还是被羟基磷灰石和其他载体吸附,在粒径增长过程中都将面临内部空隙的命运。与红色 AnGS 相比,白色 AnGS 的微生物群落更为复杂。 红色 AnGS 中含有大量的 Candidatus Brocadia,其数量随着颗粒大小的增加而增加。这项研究为选择颗粒进行anammox工程应用提供了一个新的视角。
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来源期刊
Journal of Environmental Sciences-china
Journal of Environmental Sciences-china 环境科学-环境科学
CiteScore
13.70
自引率
0.00%
发文量
6354
审稿时长
2.6 months
期刊介绍: The Journal of Environmental Sciences is an international journal started in 1989. The journal is devoted to publish original, peer-reviewed research papers on main aspects of environmental sciences, such as environmental chemistry, environmental biology, ecology, geosciences and environmental physics. Appropriate subjects include basic and applied research on atmospheric, terrestrial and aquatic environments, pollution control and abatement technology, conservation of natural resources, environmental health and toxicology. Announcements of international environmental science meetings and other recent information are also included.
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