Microbial Mats as a Biological Treatment Approach for Saline Wastewaters: The Case of Produced Water from Hydraulic Fracturing

Akyon, Benay; Stachler, Elyse; Wei, Na; Bibby, Kyle

doi:10.1021/es505142t

Cited by 54 publications

(18 citation statements)

References 49 publications

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“…PCR was performed on extracted DNA using the 515F primer and 806R barcoded sequencing primers as previously described (Caporaso et al, 2012; Akyon et al, 2015). After amplification, the PCR products were purified using an Agencourt AMPure Purification Kit (Beckman Coulter, Indianapolis, IN) using a bead ratio of 0.8.…”

Section: Methodsmentioning

confidence: 99%

Arsenic induces structural and compositional colonic microbiome change and promotes host nitrogen and amino acid metabolism

Dheer

Patterson

Dudash

et al. 2015

Toxicology and Applied Pharmacology

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Chronic exposure to arsenic in drinking water causes cancer and non-cancer diseases. However, mechanisms for chronic arsenic-induced pathogeneis, especially in response to lower exposure levels, are unclear. In addition, the importance of health impacts from xeniobiotic-promoted microbiome changes is just being realized and effects of arsenic on the microbiome with relation to disease promotion are unknown. To investigate impact of arsenic exposure on both microbiome and host metabolism, the stucture and composition of colonic microbiota, their metabolic phenotype, and host tissue and plasma metabolite levels were compared in mice exposed for 2, 5, or 10 weeks to 0, 10 (low) or 250 (high) ppb arsenite (As(III)). Genotyping of colonic bacteria revealed time and arsenic concentration dependent shifts in community composition, particularly the Bacteroidetes and Firmicutes, relative to those seen in the time-matched controls. Arsenic-induced erosion of bacterial biofilms adjacent to the mucosal lining and changes in the diversity and abundance of morphologically distinct species indicated changes in microbial community structure. Bacterical spores increased in abundance and intracellular inclusions decreased with high dose arsenic. Interestingly, expression of arsenate reductase (arsA) and the As(III) exporter arsB, remained unchanged, while the dissimilatory nitrite reductase (nrfA) gene expression increased. In keeping with the change in nitrogen metabolism, colonic and liver nitrite and nitrate levels and ratios changed with time. In addition, there was a concomitant increase in pathogenic arginine metabolites in the mouse circulation. These data suggest that arsenic exposure impacts the microbiome and microbiome/host nitrogen metabolism to support disease enhancing pathogenic phenotypes.

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Section: Methodsmentioning

confidence: 99%

Arsenic induces structural and compositional colonic microbiome change and promotes host nitrogen and amino acid metabolism

Dheer

Patterson

Dudash

et al. 2015

Toxicology and Applied Pharmacology

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“…These three pieces of information about a site's native microbes can provide a more thorough explanation of the site microbial ecology. In the past, NGS has been leveraged in water pollution scenarios to explain why microbial mats remove pollutants from wastewater (Akyon et al., ). NGS has also been used to explain why specific bioremediation strategies failed, by tracking microbial function over a specific timescale.…”

Section: Introductionmentioning

confidence: 99%

A New Perspective on Sustainable Soil Remediation—Case Study Suggests Novel Fungal Genera Could Facilitate in situ Biodegradation of Hazardous Contaminants

Czaplicki

Cooper

Ferguson

et al. 2016

Remediation Journal

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Deciding upon a cost effective and sustainable method to address soil pollution is a challenge for many remedial project managers. High pressure to quickly achieve cleanup goals pushes for energy-intensive remedies that rapidly address the contaminants of concern with established technologies, often leaving little room for research and development especially for slower treatment technologies, such as bioremediation, for the more heavily polluted sites. In the present case study, new genomic approaches have been leveraged to assess fungal biostimulation potential in soils polluted with particularly persistent hydrophobic contaminants. This new approach provides insights into the genetic functions available at a given site in a way never before possible. In particular, this article presents a case study where next generation sequencing (NGS) has been used to categorize fungi in soils from the Atlantic Wood Industries Superfund site in Portsmouth, Virginia. Data suggest that original attempts to harness fungi for bioremediation may have focused on fungal genera poorly suited to survive under heavily polluted site conditions, and that more targeted approaches relying on native indigenous fungi which are better equipped to survive under site specific conditions may be more appropriate.

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“…In small-scale tests of hydraulic fracturing fluids and flowback, the effects of salinity on aerobic degradation have been studied- Kekacs et al (2015) found that TDS > 40,000 mg L −1 inhibited biological activity in bottle tests. In small-scale treatability tests, Akyon et al (2015) observed biodegradation of 1.45 mg COD g −1 wet d −1 when TDS = 91,351 mg/L.…”

Section: Figmentioning

confidence: 99%

Biological treatment of oil and gas produced water: a review and meta-analysis

Camarillo

Stringfellow

2018

Clean Techn Environ Policy

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Biological treatment is effective but infrequently used for oil and gas produced water. To date, physical-chemical treatment methods have been favored due to the smaller space requirements and operational simplicity. Changing regulatory requirements and increased interest in recycling and beneficial reuse have led to increased interest in biological treatment. To elucidate its potential role, we reviewed and summarized 59 studies on the biological treatment of produced water. Oilfield produced water was predominantly studied (> 50%). More studies using real produced water were from China than from any other country (37%). Real produced water was used in most studies (73%). Studies were predominantly bench-scale experiments (69%). Fixed-film reactors were most prevalent (27%). Water quality of produced waters treated was variable; median total dissolved solids (TDS) was 28,000 mg L −1 and median chemical oxygen demand (COD) was 1125 mg L −1. Inhibition by salinity was variable according to the treatment system and study design, but efficacy generally decreased when TDS was above 50,000 mg L −1. For studies treating real samples, average COD removal was 73% when TDS was less than 50,000 mg L −1 , and 54% when TDS was greater than 50,000 mg L −1. Key issues were microbial acclimation, toxicity, biological fouling, and mineral scaling. Finding an inoculum was not problematic as microorganisms capable of degrading hydrocarbons were isolated from various environments. Treatment performance was better where synthetic produced water was used in lieu of real samples. Biological treatment is promising for producing effluents suitable for reuse, particularly where it functions as part of a larger treatment train.

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Microbial Mats as a Biological Treatment Approach for Saline Wastewaters: The Case of Produced Water from Hydraulic Fracturing

Cited by 54 publications

References 49 publications

Arsenic induces structural and compositional colonic microbiome change and promotes host nitrogen and amino acid metabolism

Arsenic induces structural and compositional colonic microbiome change and promotes host nitrogen and amino acid metabolism

A New Perspective on Sustainable Soil Remediation—Case Study Suggests Novel Fungal Genera Could Facilitate in situ Biodegradation of Hazardous Contaminants

Biological treatment of oil and gas produced water: a review and meta-analysis

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