Emerging Trends in Biological Treatment of Wastewater From Unconventional Oil and Gas Extraction

Acharya, Shwetha M.; Chakraborty, Romy; Tringe, Susannah G.

doi:10.3389/fmicb.2020.569019

Cited by 24 publications

(9 citation statements)

References 110 publications

(167 reference statements)

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“…It is difficult to determine the specific mechanism of action of FPW due to its nature as a complex chemical mixture, requiring a variety of instrumentations and techniques that may not be easily accessible. ,, FPW includes salt-forming ions (e.g., Na + , Ca 2+ , and Cl – ), trace metals (e.g., Fe, Zn, Sr, and Ba), and organic compounds (e.g., PAHs and volatile organic compounds). ,,− These compounds may contribute to additive, synergistic, or antagonistic toxicity; however, additional studies are required in order to identify the depth of these possibilities. This is further complicated by the new materials made under the conditions in the well-bore environment and every well seemingly has different mixture compounds and concentrations .…”

Section: Resultsmentioning

confidence: 99%

Persisting Effects in Daphnia magna Following an Acute Exposure to Flowback and Produced Waters from the Montney Formation

Boyd

Luu

Mehta

et al. 2023

Environ. Sci. Technol.

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Hydraulic fracturing extracts oil and gas through the injection of water and proppants into subterranean formations. These injected fluids mix with the host rock formation and return to the surface as a complex wastewater containing salts, metals, and organic compounds, termed flowback and produced water (FPW). Previous research indicates that FPW is toxic to Daphnia magna (D. magna), impairing reproduction, molting, and maturation time; however, recovery from FPW has not been extensively studied. Species unable to recover have drastic impacts on populations on the ecological scale; thus, this study sought to understand if recovery from an acute 48 h FPW exposure was possible in the freshwater invertebrate, D. magna by using a combination of physiological and molecular analyses. FPW (0.75%) reduced reproduction by 30% and survivorship to 32% compared to controls. System-level quantitative proteomic analyses demonstrate extensive perturbation of metabolism and protein transport in both 0.25 and 0.75% FPW treatments after a 48 h FPW exposure. Collectively, our data indicate that D. magna are unable to recover from acute 48 h exposures to ≥0.25% FPW, as evidence of toxicity persists for at least 19 days post-exposure. This study highlights the importance of considering persisting effects following FPW remediation when modeling potential spill scenarios.

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Section: Resultsmentioning

confidence: 99%

Persisting Effects in Daphnia magna Following an Acute Exposure to Flowback and Produced Waters from the Montney Formation

Boyd

Luu

Mehta

et al. 2023

Environ. Sci. Technol.

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“…Although the bacteria grows well in the reactor (as indicated by the high growth rate (Y) value), their low affinity for the substrate causes the COD concentration of effluent to be relatively high [45]. Shwetha et al [46] reported similar conclusions in their literature review on the treatment of WW from unconventional oil and gas extraction processes.…”

Section: Bacterial-based Biological Processesmentioning

confidence: 92%

Biological-Based Produced Water Treatment Using Microalgae: Challenges and Efficiency

et al. 2022

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Produced water (PW) is the most significant waste stream generated in the oil and gas industries. The generated PW has the potential to be a useful water source rather than waste. While a variety of technologies can be used for the treatment of PW for reuse, biological-based technologies are an effective and sustainable remediation method. Specifically, microalgae, which are a cost-effective and sustainable process that use nutrients to eliminate organic pollutants from PW during the bioremediation process. In these treatment processes, microalgae grow in PW free of charge, eliminate pollutants, and generate clean water that can be recycled and reused. This helps to reduce CO2 levels in the atmosphere while simultaneously producing biofuels, other useful chemicals, and added-value products. As such, this review focuses on PW generation in the oil and gas industry, PW characteristics, and examines the available technologies that can be used for PW remediation, with specific attention to algal-based technologies. In addition, the various aspects of algae growth and cultivation in PW, the effect of growth conditions, water quality parameters, and the corresponding treatment performance are presented. Lastly, this review emphasizes the bioremediation of PW using algae and highlights how to harvest algae that can be processed to generate biofuels for added-value products as a sustainable approach.

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“…13 Bioreactors exhibited notable efficacy in removing organic matter from low-salinity SGFPW treatment. 55 It was worth studying how to utilize and strengthen the functions of core microorganisms in bioreactors to further improve their organic removal rates and shock load resistance. Besides, there was a lack of anaerobic biotechnology as a result of the slower startup, poor load resistance, and high maintenance costs of anaerobic processes.…”

Section: Eukaryotic Communitymentioning

confidence: 99%

Microbial Insights into Shale Gas Wastewater from the Sichuan Basin: Diversity, Potential Functions, and Implications

Tang,

Zhong,

Zhang

et al. 2024

Energy Fuels

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Shale gas flowback and produced water (SGFPW) represent a reservoir of diverse and valuable halophilic microbial resources with profound implications for both shale gas production and SGFPW treatment strategies. However, current research is limited, especially in China. To address this gap, we conducted an extensive study of the microbial community compositions within SGFPW originating from three prominent shale gas blocks in the Sichuan Basin, China. Our findings underscored the coexistence of halotolerant and halophilic bacteria, methylotrophic archaea, and eukaryotes within SGFPW, revealing a remarkably intricate microbial ecosystem. Intriguingly, the archaeal community structure exhibited striking similarity across all SGFPW samples, implying a consistent composition in this regard. Moreover, salinity was identified as a pivotal factor shaping the bacterial community structure in SGFPW. Although divergence in species and abundance of core microbial genera was observed among distinct SGFPW samples, their dominant potential functions remained remarkably consistent. These functions encompassed sulfate reduction, methane production, denitrification, acid production, and degradation of characteristic organic matter of SGFPW. Our comprehensive study significantly advances the comprehension of the microbial community structure within SGFPW, thereby offering valuable insights to augment the overall efficiency of SGFPW management and develop efficient SGFPW biological treatment technologies.

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Emerging Trends in Biological Treatment of Wastewater From Unconventional Oil and Gas Extraction

Cited by 24 publications

References 110 publications

Persisting Effects in Daphnia magna Following an Acute Exposure to Flowback and Produced Waters from the Montney Formation

Persisting Effects in Daphnia magna Following an Acute Exposure to Flowback and Produced Waters from the Montney Formation

Biological-Based Produced Water Treatment Using Microalgae: Challenges and Efficiency

Microbial Insights into Shale Gas Wastewater from the Sichuan Basin: Diversity, Potential Functions, and Implications

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