High growth potential and nitrogen removal performance of marine anammox bacteria in shrimp-aquaculture sediment
High growth potential and nitrogen removal performance of marine anammox bacteria in shrimp-aquaculture sediment
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DOI：
10.1016/j.chemosphere.2017.12.159
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发表时间：
2018-04-01
期刊：
影响因子：
8.8
通讯作者：
Kawagoshi, Yasunori
中科院分区：
文献类型：
--
作者：
Luong Van Duc;Song, Bongkeun;Kawagoshi, Yasunori
Anaerobic ammonium oxidation (anammox) bacteria were enriched in continuous packed-bed columns with marine sediment. One column (SB-C) was packed with only marine sediment collected from a shrimp-aquaculture pond, and another column (SB-AMX) was inoculated with marine anammox bacteria (MAB) as a control. These columns were continuously fed with natural or artificial seawater including ammonium (NH4+) and nitrite (NO2-). The SB-AMX showed anammox activities from the beginning and continued for over 200 days. However, the SB-C had no nitrogen removal performance for over 170 days. After adding a bicarbonate solution (KHCO3) to the sediment-only packed column, anammox activity was observed within 13 days. The column exhibited a nitrogen removal efficiency (NRE) of 88% at a nitrogen loading rate (NLR) of 1.0 kg-N . m(-3). day(-1), which was comparable to the control one. A next-generation sequencing analysis revealed the predominance of MAB related to "Candidatus Scalindua spp.". In addition, the co-occurrence of sulfur-oxidizing denitrifiers was observed, which suggests their symbiotic relationship. This study suggests the applicability of MAB for in-situ bioremediation of nitrogen-contaminated marine sediments and reveals a potential microbial interaction between anammox and sulfur-oxidizing communities responsible for nitrogen and sulfur cycling in marine aquaculture systems. (C) 2017 Elsevier Ltd. All rights reserved.
