A review in the current developments of genus Dehalococcoides , its consortia and kinetics for bioremediation options of contaminated groundwater

Saiyari, Donamel M.; Chuang, Hui Ping; Senoro, Delia B.; Lin, Tsair Fuh; Whang, Liang Ming; Chiu, Ying-Ta; Chen, Yi Hsuan

doi:10.1016/j.serj.2018.01.006

Cited by 53 publications

(27 citation statements)

References 80 publications

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“…Several microorganisms are capable of partially degrading PCE and TCE to 1,2-cis-Dichloroethylene (cisDCE) [3,4], while only the Dehalococcoides mccartyi (D. mccartyi) can perform the total conversion of PCE to ethylene (Eth), the final nontoxic RD byproduct. D. mccartyi activity is driven by strain-specific enzymes coded by reductive dehalogenase genes, including tceA, bvcA, and vcrA [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Feeding Solution Composition on a Reductive/Oxidative Sequential Bioelectrochemical Process for Perchloroethylene Removal

et al. 2021

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Chlorinated aliphatic hydrocarbons (CAHs) are common groundwater contaminants due to their improper use in several industrial activities. Specialized microorganisms are able to perform the reductive dechlorination (RD) of high-chlorinated CAHs such as perchloroethylene (PCE), while the low-chlorinated ethenes such as vinyl chloride (VC) are more susceptible to oxidative mechanisms performed by aerobic dechlorinating microorganisms. Bioelectrochemical systems can be used as an effective strategy for the stimulation of both anaerobic and aerobic microbial dechlorination, i.e., a biocathode can be used as an electron donor to perform the RD, while a bioanode can provide the oxygen necessary for the aerobic dechlorination reaction. In this study, a sequential bioelectrochemical process constituted by two membrane-less microbial electrolysis cells connected in series has been, for the first time, operated with synthetic groundwater, also containing sulphate and nitrate, to simulate more realistic process conditions due to the possible establishment of competitive processes for the reducing power, with respect to previous research made with a PCE-contaminated mineral medium (with neither sulphate nor nitrate). The shift from mineral medium to synthetic groundwater showed the establishment of sulphate and nitrate reduction and caused the temporary decrease of the PCE removal efficiency from 100% to 85%. The analysis of the RD biomarkers (i.e., Dehalococcoides. mccartyi 16S rRNA and tceA, bvcA, vcrA genes) confirmed the decrement of reductive dechlorination performances after the introduction of the synthetic groundwater, also characterized by a lower ionic strength and nutrients content. On the other hand, the system self-adapted the flowing current to the increased demand for the sulphate and nitrate reduction, so that reducing power was not in defect for the RD, although RD coulombic efficiency was less.

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Section: Introductionmentioning

confidence: 99%

Effects of the Feeding Solution Composition on a Reductive/Oxidative Sequential Bioelectrochemical Process for Perchloroethylene Removal

et al. 2021

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“…capable of complete dechlorination, provides a unique solution for remediation of contaminated sites. However, bioaugmentation process requires high cell density, upto 10 12 Dehalococcoides cells L −1 (Waller et al 2005;Duhamel and Edwards 2006;Holmes et al 2006;Hug et al 2012;Delgado et al 2014;Wen et al 2017;Saiyari et al 2018) in active cultures and the transformation of cis-DCE and VC, avoiding the accumulation of the nascent DCE and VC in the environment (Holmes et al 2006). To establish dechlorinating enrichments, microbial communities were collected and enriched from different anaerobic sites contaminated with PCE and TCE (Duhamel et al 2002;Holmes et al 2006), and moreover from sediment of river and tropical mangrove and garden soils not exposed to contamination (He et al 2005;Ziv-El et al 2011;Delgado et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of site-specific dechlorinating microbial inocula capable of complete dechlorination enriched in anaerobic microcosms amended with clay mineral

Nagymáté

Jurecska

Romsics

et al. 2020

World J Microbiol Biotechnol

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Short-chain halogenated aliphatic hydrocarbons (e.g. perchloroethene, trichloroethene) are among the most toxic environmental pollutants. Perchloroethene and trichloroethene can be dechlorinated to non-toxic ethene through reductive dechlorination by Dehalococcoides sp. Bioaugmentation, applying cultures containing organohalide-respiring microorganisms, is a possible technique to remediate sites contaminated with chlorinated ethenes. Application of site specific inocula is an efficient alternative solution. Our aim was to develop site specific dechlorinating microbial inocula by enriching microbial consortia from groundwater contaminated with trichloroethene using microcosm experiments containing clay mineral as solid phase. Our main goal was to develop fast and reliable method to produce large amount (100 L) of bioactive agent with anaerobic fermentation technology. Polyphasic approach has been applied to monitor the effectiveness of dechlorination during the transfer process from bench-scale (500 mL) to industrial-scale (100 L). Gas chromatography measurement and T-RFLP (Terminal Restriction Fragment Length Polymorphism) revealed that the serial subculture of the enrichments shortened the time-course of the complete dechlorination of trichloroethene to ethene and altered the composition of bacterial communities. Complete dechlorination was observed in enrichments with significant abundance of Dehalococcoides sp. cultivated at 8 °C. Consortia incubated in fermenters at 18 °C accelerated the conversion of TCE to ethene by 7-14 days. Members of the enrichments belong to the phyla Bacteroidetes, Chloroflexi, Proteobacteria and Firmicutes. According to the operational taxonomic units, main differences between the composition of the enrichment incubated at 8 °C and 18 °C occurred with relative abundance of acetogenic and fermentative species. In addition to the temperature, the site-specific origin of the microbial communities and the solid phase applied during the fermentation technique contributed to the development of a unique microbial composition.

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“…Molecular biological technology is becoming an important tool to clarify the bioremediation mechanism in recent years. Although the advances in phytoremediation and microremediation, bioremediation technology is still in the test and demonstration stage, especially the in-situ methods (Daniel, Jegathambal, and Bevers 2019;Jugnia et al 2018;Saiyari et al 2018).…”

Section: Ecological Remediation Of Contaminated Sitesmentioning

confidence: 99%

Ecology of industrial pollution in China

Yuan

Lü

Wang

et al. 2020

Ecosyst Health Sustain

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Industrial development has brought China both opportunities and challenges since the reform and opening up in 1978. Spatial and temporal analysis showed that rapid industrialization has made eastern China under a more serious pollution stress. The most serious effects of industrial pollution were reflected in aquatic and soil ecosystem degradation, and damage can be observed from species, population, and community to ecosystem level. Public consciousness about contaminated sites rose from 2004 leading to greater efforts in ecological remediation, monitoring, and risk governance. Considerable efforts are still needed in expanding the extent and breadth of monitoring to explore where the greatest ecological risks lie and how to control them. Ecology of industrial pollution has become a popular discipline in China and will be further developed to help achieve the Sustainable Development Goals. Future research for a better ecological risk management should be focused on multi-media transfer and effects of mixed pollutants, mechanisms for clean energy and material flow, and integration of ecological risk with human health risk.

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A review in the current developments of genus Dehalococcoides , its consortia and kinetics for bioremediation options of contaminated groundwater

Cited by 53 publications

References 80 publications

Effects of the Feeding Solution Composition on a Reductive/Oxidative Sequential Bioelectrochemical Process for Perchloroethylene Removal

Effects of the Feeding Solution Composition on a Reductive/Oxidative Sequential Bioelectrochemical Process for Perchloroethylene Removal

Preparation and characterization of site-specific dechlorinating microbial inocula capable of complete dechlorination enriched in anaerobic microcosms amended with clay mineral

Ecology of industrial pollution in China

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