Unknown

Dataset Information

0

Electrical stimulation improves microbial salinity resistance and organofluorine removal in bioelectrochemical systems.


ABSTRACT: Fed batch bioelectrochemical systems (BESs) based on electrical stimulation were used to treat p-fluoronitrobenzene (p-FNB) wastewater at high salinities. At a NaCl concentration of 40 g/liter, p-FNB was removed 100% in 96 h in the BES, whereas in the biotic control (BC) (absence of current), p-FNB removal was only 10%. By increasing NaCl concentrations from 0 g/liter to 40 g/liter, defluorination efficiency decreased around 40% in the BES, and in the BC it was completely ceased. p-FNB was mineralized by 30% in the BES and hardly in the BC. Microorganisms were able to store 3.8 and 0.7 times more K(+) and Na(+) intracellularly in the BES than in the BC. Following the same trend, the ratio of protein to soluble polysaccharide increased from 3.1 to 7.8 as the NaCl increased from 0 to 40 g/liter. Both trends raise speculation that an electrical stimulation drives microbial preference toward K(+) and protein accumulation to tolerate salinity. These findings are in accordance with an enrichment of halophilic organisms in the BES. Halobacterium dominated in the BES by 56.8% at a NaCl concentration of 40 g/liter, while its abundance was found as low as 17.5% in the BC. These findings propose a new method of electrical stimulation to improve microbial salinity resistance.

SUBMITTER: Feng H 

PROVIDER: S-EPMC4421048 | BioStudies | 2015-01-01

REPOSITORIES: biostudies

Similar Datasets

2019-01-01 | S-EPMC6419579 | BioStudies
2011-01-01 | S-EPMC3208997 | BioStudies
2014-01-01 | S-EPMC4229359 | BioStudies
2008-01-01 | S-EPMC2223267 | BioStudies
2019-01-01 | S-EPMC6828628 | BioStudies
2018-01-01 | S-EPMC5781293 | BioStudies
2016-01-01 | S-EPMC4784034 | BioStudies
1000-01-01 | S-EPMC3504498 | BioStudies
2019-01-01 | S-EPMC6469603 | BioStudies
2012-01-01 | S-EPMC3370536 | BioStudies