scholarly journals Comparative assessment of managed aquifer recharge versus constructed wetlands in managing chemical and microbial risks during wastewater reuse: a review

2013 ◽  
Vol 4 (1) ◽  
pp. 1-8 ◽  
Author(s):  
A. F. Hamadeh ◽  
S. K. Sharma ◽  
G. Amy
Keyword(s):  
Water Quality ◽  
Constructed Wetlands ◽  
Wastewater Reuse ◽  
Cost Effective ◽  
Managed Aquifer Recharge ◽  
Water Recovery ◽  
Aquifer Recharge ◽  
Natural Treatment Systems ◽  
Natural Treatment ◽  
Pre Treatment

Constructed wetlands (CWs) and managed aquifer recharge (MAR) represent commonly used natural treatment systems for reclamation and reuse of wastewater. However, each of these technologies have some limitations with respect to removal of different contaminants. Combining these two technologies into a hybrid CW-MAR system will lead to synergy in terms of both water quality and costs. This promising technology will help in the reduction of bacteria and viruses, trace and heavy metals, organic micropollutants, and nutrients. Use of subsurface flow CWs as pre-treatment for MAR has multiple benefits: (i) it creates a barrier for different microbial and chemical pollutants, (ii) it reduces the residence time for water recovery, and (iii) it avoids clogging during MAR as CWs can remove suspended solids and enhance the reclaimed water quality. This paper analyzes the removal of different contaminants by CW and MAR systems based on a literature review. It is expected that a combination of these natural treatment systems (CWs and MAR) could become an attractive, efficient and cost-effective technology for water reclamation and reuse.

scholarly journals Village-Scale Electrodialysis Desalination: Field Trial Validation

2017 ◽  
Author(s):  
Natasha C. Wright ◽  
Amos G. Winter
Keyword(s):  
Water Quality ◽  
Field Trial ◽  
Design Methodology ◽  
Specific Energy Consumption ◽  
Cost Effective ◽  
Experimental Results ◽  
Water Recovery ◽  
Research Facility ◽  
High Recovery ◽  
Product Water

This paper presents the design and initial testing of a village-scale photovoltaic (PV) powered electrodialysis reversal (EDR) desalination system for rural India. The system was built by the authors and tested at the Brackish Groundwater National Desalination Research Facility in New Mexico. EDR has the potential to be more cost effective than currently installed village-scale reverse osmosis (RO) systems in off-grid locations due to the lower specific energy consumption of EDR versus RO at high recovery ratios. Lower energetic demand leads to lower solar power system costs for off-grid areas. The system tested in this study is designed to validate that energetic, product water quality, and water recovery requirements can be met. An analytical model of the system that accounts for the composition of natural groundwater is presented and compared to initial experimental results. Additionally, results from the USAID Desal Prize are presented showing the system’s performance in regards to recovery ratio and product water quality. This paper presents the design methodology, resulting system parameters, and experimental results for an initial village-scale PV-EDR field trial.

Tuning the performance of a natural treatment process using metagenomics for improved trace organic chemical attenuation

2013 ◽  
Vol 69 (3) ◽  
pp. 628-633 ◽  
Author(s):  
J. E. Drewes ◽  
D. Li ◽  
J. Regnery ◽  
M. Alidina ◽  
A. Wing ◽  
...  
Keyword(s):  
High Throughput Sequencing ◽  
Treatment Process ◽  
Managed Aquifer Recharge ◽  
Organic Chemical ◽  
Aquifer Recharge ◽  
Community Characteristics ◽  
Natural Treatment ◽  
Trace Organic Chemicals ◽  
Primary Substrate ◽  
Trace Organic

By utilizing high-throughput sequencing and metagenomics, this study revealed how the microbial community characteristics including composition, diversity, as well as functional genes in managed aquifer recharge (MAR) systems can be tuned to enhance removal of trace organic chemicals of emerging concern (CECs). Increasing the humic content of the primary substrate resulted in higher microbial diversity. Lower concentrations and a higher humic content of the primary substrate promoted the attenuation of biodegradable CECs in laboratory and field MAR systems. Metagenomic results indicated that the metabolic capabilities of xenobiotic biodegradation were significantly promoted for the microbiome under carbon-starving conditions.

scholarly journals Microbial population changes during managed aquifer recharge (MAR)

2009 ◽  
Vol 30 (1) ◽  
pp. 33
Author(s):  
Simon Toze ◽  
Deborah Reed
Keyword(s):  
Water Quality ◽  
Population Dynamics ◽  
Population Structure ◽  
Microbial Population ◽  
Managed Aquifer Recharge ◽  
Quality Changes ◽  
Aquifer Recharge ◽  
Population Changes ◽  
Recycled Water ◽  
Microbial Population Dynamics

Managed aquifer recharge (MAR) is a technique that can be used to capture and store water in aquifers under managed conditions for later recovery and use for specific purposes. There is a need to predict water quality changes during MAR, particularly when recycled water is used as the recharged water. An understanding of the interaction between the geochemistry of the aquifer and the microbial population dynamics in the groundwater is important for understanding any water quality changes. A study was undertaken to monitor the changes in the microbial population and link this to changes in the geochemistry. The results obtained showed that the recharge of recycled water to aquifers causes a change in microbial population structure which has direct links to corresponding changes in geochemistry.

Managed aquifer recharge: state-of-the-art and opportunities

2015 ◽  
Vol 15 (3) ◽  
pp. 578-588 ◽  
Author(s):  
Robert G. Maliva
Keyword(s):  
Water Quality ◽  
State Of The Art ◽  
Leading Edge ◽  
Managed Aquifer Recharge ◽  
Screening Tools ◽  
Successful Implementation ◽  
Aquifer Recharge ◽  
Aquifer Characterization ◽  
Modeling Methods ◽  
Local Solutions

The performance of managed aquifer recharge (MAR) systems is highly dependent upon local hydrogeology, which controls the movement and mixing of stored water and fluid–rock interactions, which can impact recharged water quality. The leading edge of MAR technology is the integration of data obtained using conventional and advanced aquifer characterization technologies into groundwater models that have improved predictive capabilities. Borehole and surface geophysical technologies and geostatistical and stochastic modeling methods, in particular, offer opportunities for improved aquifer characterization and modeling. The objective is to develop more accurate groundwater models that can be used as site-screening tools to identify locations and aquifers that have the greatest potential for successful implementation of MAR and to evaluate various design and operational options to find optimal local solutions.

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