干旱区生态环境知识资源中心(Arid): On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system

Arid

DOI	10.5194/hess-24-417-2020
	On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system
	Ben Moshe, Shany 1; Weisbrod, Noam 2; Barquero, Felix 3; Sallwey, Jana 3; Orgad, Ofri 2; Furman, Alex 1
通讯作者	Ben Moshe, Shany
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2020
卷号	24 期号:1 页码:417-426
英文摘要	Sustainable irrigation with treated wastewater (TWW) is a promising solution for water scarcity in arid and semi-arid regions. Soil aquifer treatment (SAT) provides a solution for both the need for tertiary treatment and seasonal storage of wastewater. Stresses over land use and the need to control the obtained water quality makes the optimization of SAT of great importance. This study looks into the influence of SAT systems' operational dynamics (i.e., flooding and drying periods) as well as some aspects of the inflow biochemical composition on their biogeochemical state and the ultimate outflow quality. A series of four long-column experiments was conducted, aiming to examine the effect of different flooding/drying period ratios on dissolved oxygen (DO) concentrations, oxidation-reduction potential (ORP) and outflow composition. Flooding periods were kept constant at 60 min for all experiments while drying periods (DPs) were 2.5 and 4 times the duration of the flooding periods. Our results show that the longer DPs had a significant advantage over the shorter periods in terms of DO concentrations and ORP in the upper parts of the column as well as in the deeper parts, which indicates that larger volumes of the profile were able to maintain aerobic conditions. DO concentrations in the deeper parts of the column stabilized at similar to 3-4 mg L-1 for the longer DPs compared to similar to 1-2 mg L-1 for the shorter DPs. This advantage was also evident in outflow composition that showed significantly lower concentrations of NH4+-N, dissolved organic carbon (DOC) and total Kjel-dahl nitrogen (TKN) for the longer DPs (similar to 0.03, similar to 1.65 and similar to 0.62 mg L-1 respectively) compared to the shorter DPs (similar to 0.5, similar to 4.4 and similar to 3.8 mg L-1, respectively). Comparing experimental ORP values in response to different DPs to field measurements obtained in one of the SAT ponds of the SHAFDAN, Israel, we found that despite the large-scale differences between the experimental 1-D system and the field 3-D conditions, ORP trends in response to changes in DP, qualitatively match. We conclude that longer DP not only ensure oxidizing conditions close to the surface, but also enlarge the active (oxidizing) region of the SAT. While those results still need to be verified at full scale, they suggest that SAT can be treated as a pseudo-reactor that to a great extent could be manipulated hydraulically to achieve the desired water quality while increasing the recharge volumes.
类型	Article
语种	英语
国家	Israel ; Germany
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000510382700001
WOS关键词	TREATMENT SAT ; WASTE-WATER ; HYDRAULIC-PROPERTIES ; INFILTRATION BASINS ; EFFLUENT ; RECHARGE ; OXYGEN ; FATE ; DESICCATION ; BIOFILM
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
EI主题词	2020-01-28
来源机构	Ben-Gurion University of the Negev
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312614
作者单位	1.Technion Israel Inst Technol, Civil & Environm Engn, IL-32000 Haifa, Israel; 2.Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Zuckerberg Inst Water Res, IL-8499000 Midreshet Ben Gurion, Israel; 3.Tech Univ Dresden, Inst Groundwater Management, Dresden, Germany
推荐引用方式 GB/T 7714	Ben Moshe, Shany,Weisbrod, Noam,Barquero, Felix,et al. On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system[J]. Ben-Gurion University of the Negev,2020,24(1):417-426.
APA	Ben Moshe, Shany,Weisbrod, Noam,Barquero, Felix,Sallwey, Jana,Orgad, Ofri,&Furman, Alex.(2020).On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system.HYDROLOGY AND EARTH SYSTEM SCIENCES,24(1),417-426.
MLA	Ben Moshe, Shany,et al."On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system".HYDROLOGY AND EARTH SYSTEM SCIENCES 24.1(2020):417-426.