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Coupled Sulfur and Iron(II) Carbonate-Driven Autotrophic Denitrification for Significantly Enhanced Nitrate Removal
Zhu, Ting-ting; Cheng, Hao-yi; Yang, Li-hui; Su, Shi-gang; Wang, Hong-cheng; Wang, Shu-sen; Wang, Ai-jie
2019-02-05
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume53Issue:3Pages:1545-1554
AbstractSulfur-based denitrification process has attracted increasing attentions because it does not rely on the external addition of organics and avoids the risk of COD exceeding the limit. Traditionally, limestone is commonly employed to maintain a neutral condition (SLAD process), but it may reduce the efficiency as the occupied zone by limestone cannot directly contribute to the denitrification. In this study, we propose a novel sulfur-based denitrification process by coupling with iron(II) carbonate ore (SICAD system). The ore was demonstrated to play roles as the buffer agent and additional electron donor. Moreover, the acid produced through sulfur driven denitrification was found to promote the Fe(II) leaching from the ore and likely extend the reaction zone from the surface to the liquid. As a result, more biomass was accumulated in the SICAD system compared with the controls (sulfur, iron(II) carbonate ore and SLAD systems). Owing to these synergistic effects of sulfur and iron(II) carbonate on denitrification, SICAD system showed much higher denitrification rate (up to 720.35 g.N/m(3).d) and less accumulation of intermediates (NO2- and N2O) than the controls. Additionally, sulfate production in SICAD system was reduced. These findings offer great potential of SICAD system for practical use as a highly efficient postdenitrification process.
Department中国科学院环境生物技术重点实验室
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43348
Collection中国科学院环境生物技术重点实验室
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Ting-ting,Cheng, Hao-yi,Yang, Li-hui,et al. Coupled Sulfur and Iron(II) Carbonate-Driven Autotrophic Denitrification for Significantly Enhanced Nitrate Removal[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(3):1545-1554.
APA Zhu, Ting-ting.,Cheng, Hao-yi.,Yang, Li-hui.,Su, Shi-gang.,Wang, Hong-cheng.,...&Wang, Ai-jie.(2019).Coupled Sulfur and Iron(II) Carbonate-Driven Autotrophic Denitrification for Significantly Enhanced Nitrate Removal.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(3),1545-1554.
MLA Zhu, Ting-ting,et al."Coupled Sulfur and Iron(II) Carbonate-Driven Autotrophic Denitrification for Significantly Enhanced Nitrate Removal".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.3(2019):1545-1554.
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