Isolation and characterization of halophilic bacterial consortium from seagrass, Jeddah coast, for the degradation of petroleum hydrocarbons and treatment of hydrocarbons-contaminated boat fuel station wastewater

Jamal, Mamdoh T.; Pugazhendi, Arulazhagan

doi:10.1007/s10098-020-01957-1

Cited by 5 publications

(1 citation statement)

References 41 publications

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“…Moreover, it was reported for co-cultivations of microorganisms, that productivities and process efficiencies can be improved, compared to monocultures ( Angell et al, 2006 ; Ishika et al, 2017 ; Anh et al, 2021 ). Moreover, the potential of halophilic consortia for the bioremediation of saline wastewater contaminated with organic impurities like aromatics was already proven in several cases ( Jamal and Pugazhendi, 2018 ; Al-Shaikh and Jamal, 2020 ; Jamal and Pugazhendi, 2021 ; Jin et al, 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Reducing Organic Load From Industrial Residual Process Brine With a Novel Halophilic Mixed Culture: Scale-Up and Long-Term Piloting of an Integrated Bioprocess

Mainka

Herwig

Pflügl

2022

Front. Bioeng. Biotechnol.

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Integrating bioprocess solutions for treatment and subsequent reuse of saline residual process brine into industrial processes could increase the sustainability of production chains. However, such bioprocesses require large-scales and a robust operation over a prolonged period. Consequently, the aim of this study was to analyze scale-up equivalence as well as continuous and stable process performance of a previously established lab scale process for the degradation of organic contaminants (formate and aromatic compounds) in an industrial context. To that end, a pilot-scale bubble column bioreactor system equipped with a membrane-based cell retention system for process intensification was integrated at an industrial production site. The process was successfully scaled-up and continuously operated for more than 210 days. Overall, the process proved to be robust towards changing compositions of the residual process brine stream and degradation rates for organic contaminants were close to 100%. Interestingly, due to the unsterile process conditions, the original Haloferax mediterranei culture was replaced by a novel halophilic bacterial community consisting of three bacterial genera. To further improve process economics and productivity, an optimization of the co-substrate feeding strategy for glycerol is required, as results indicated a potential correlation between glycerol feeding and formate degradation rates. To that end, decoupling of the glycerol feeding from the residual process brine feed is a potential way to increase process control options and allow for easy adaptation of the process to changing residual process brine compositions. Ultimately, the process described here could be a promising alternative for chemical or physical methods of treating residual process brine and once more underlines the potential to exploit natural microbial diversity for industrial purposes.

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