DOI: 10.5194/hess-24-417-2020
论文题名: On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system
作者: Ben Moshe S. ; Weisbrod N. ; Barquero F. ; Sallwey J. ; Orgad O. ; Furman A.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期: 1 起始页码: 417
结束页码: 426
语种: 英语
Scopus关键词: Aquifers
; Biochemical oxygen demand
; Biogeochemistry
; Dissolved oxygen
; Floods
; Land use
; Organic carbon
; Redox reactions
; Water quality
; Arid and semi-arid regions
; Biochemical composition
; Dissolved organic carbon
; Dissolved oxygen concentrations
; Oxidation reduction potential
; Oxidizing conditions
; Soil aquifer treatments
; Total Kjeldahl nitrogens
; Wastewater treatment
; biochemical composition
; biogeochemistry
; dissolved organic carbon
; dissolved oxygen
; irrigation system
; operations technology
; three-dimensional modeling
; wastewater treatment plant
; water quality
; water treatment
; Israel
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 ĝ1/43 -4 mg L-1 for the longer DPs compared to ĝ1/41 -2 mg L-1 for the shorter DPs. This advantage was also evident in outflow composition that showed significantly lower concentrations of NH 4 + ĝ1/40.03 , ĝ1/41.65 and ĝ1/40.62 mg L-1 respectively) compared to the shorter DPs (ĝ1/40.5 , ĝ1/44.4 and ĝ1/43.8 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. © 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162805
Appears in Collections: 气候变化与战略
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作者单位: Ben Moshe, S., Technion - Israel Institute of Technology, Civil and Environmental Engineering, Haifa, 32000, Israel; Weisbrod, N., Zuckerberg Institute for Water Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion8499000, Israel; Barquero, F., Institute for Groundwater Management, Technische Universität Dresden, Dresden, Germany; Sallwey, J., Institute for Groundwater Management, Technische Universität Dresden, Dresden, Germany; Orgad, O., Zuckerberg Institute for Water Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Midreshet Ben-Gurion8499000, Israel; Furman, A., Technion - Israel Institute of Technology, Civil and Environmental Engineering, Haifa, 32000, Israel
Recommended Citation:
Ben Moshe S.,Weisbrod N.,Barquero F.,et al. On the role of operational dynamics in biogeochemical efficiency of a soil aquifer treatment system[J]. Hydrology and Earth System Sciences,2020-01-01,24(1)