E. coli and turbidity attenuation during urban stormwater recycling via Aquifer Storage and Recovery in a brackish limestone aquifer

Page, Declan; Vanderzalm, Joanne; Barry, Karen; Torkzaban, Saeed; Gonzalez, Dennis; Dillon, Peter J.

doi:10.1016/j.ecoleng.2015.09.023

Cited by 19 publications

(16 citation statements)

References 21 publications

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“…Thus, removal is largely due to filtration of insoluble P, with some adsorption of soluble P. Recovered water remained subsaturated with respect to hydroxyapatite, and thus precipitation was not likely to explain the observed P removal. Removal efficiency up to 75% for turbidity during stormwater ASR is evidence that aquifer storage can be an effective means of treatment for particulate matter (Page et al, 2015). Accumulation of insoluble P in close proximity to the ASR well, resulting from filtration, can be managed by well backflushing regimes.…”

Section: Resultsmentioning

confidence: 99%

“…The variability of nutrient concentrations was characterized by fitting observed data to lognormal PDFs using a Monte Carlo simulation approach (Palisade, 2016), as previously described by Vanderzalm et al (2013) and Page et al (2015). As the analysis uses the characteristics of the distribution to estimate values below the limit of detection, it is suited to left‐censored data typical for water quality data; in this instance, ammonium (NH 4 –N) and oxidized N (NO x –N) concentrations were often reported below the limit of detection.…”

Section: Methodsmentioning

confidence: 99%

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Nutrient Removal during Stormwater Aquifer Storage and Recovery in an Anoxic Carbonate Aquifer

et al. 2018

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Stormwater harvesting coupled to managed aquifer recharge (MAR) provides a means to use the often wasted stormwater resource while also providing protection of the natural and built environment. Aquifers can act as a treatment barrier within a multiple-barrier approach to harvest and use urban stormwater. However, it remains challenging to assess the treatment performance of a MAR scheme due to the heterogeneity of aquifers and MAR operations, which in turn influences water treatment processes. This study uses a probabilistic method to evaluate aquifer treatment performance based on the removal of total organic C (TOC), N, and P during MAR with urban stormwater in an anoxic carbonate aquifer. Total organic C, N, and P are represented as stochastic variables and described by probability density functions (PDFs) for the "injectant" and "recovery"; these injectant and recovery PDFs are used to derive a theoretical MAR removal efficiency PDF. Four long-term MAR sites targeting one of two tertiary carbonate aquifers (T1 and T2) were used to describe the nutrient removal efficiencies. Removal of TOC and total N (TN) was dominated by redox processes, with median removal of TOC between 50 and 60% at all sites and TN from 40 to 50% at three sites with no change at the fourth. Total P removal due to filtration and sorption accounted for median removal of 29 to 53%. Thus, the statistical method was able to characterize the capacity of the anoxic carbonate aquifer treatment barrier for nutrient removal, which highlights that aquifers can be an effective long-term natural treatment option for management of water quality, as well as storage of urban stormwater.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Nutrient Removal during Stormwater Aquifer Storage and Recovery in an Anoxic Carbonate Aquifer

et al. 2018

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“…can also be removed by using the Aquifer Storage and Recovery (ASR) system, which has been historically used to store harvested urban stormwater in aquifers for subsequent reuse (Page et al, 2015). Stormwater was injected into a confined carbonate aquifer that initially contained brackish water.…”

Section: E Coli Along With Other Pathogens and Virusesmentioning

confidence: 99%

Wetlands for Wastewater Treatment

Martinez‐Guerra

Gude

et al. 2016

Water Environment Research

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An update on the current research and development of the treatment technologies, which utilize natural processes or passive components in wastewater treatment, is provided in this paper. The main focus is on wetland systems and their applications in wastewater treatment (as an advanced treatment unit or decentralized system), nutrient and pollutant removal (metals, industrial and emerging pollutants including pharmaceutical compounds). A summary of studies involving the effects of vegetation, wetland design and modeling, hybrid and innovative systems, storm water treatment and pathogen removal is also included.

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“…Studies have shown pathogens, including E. coli , can be inactivated during storage of the recharged water, although the specific native geochemical conditions which enhanced inactivation were not identified (Page et al . , ; Sidhu et al . ; Toze et al .…”

Section: Introductionmentioning

confidence: 99%