Impact of salinity on the population dynamics of microorganisms in a membrane bioreactor treating produced water.
Sci Total Environ
; 646: 1080-1089, 2019 Jan 01.
Article
em En
| MEDLINE
| ID: mdl-30235594
ABSTRACT
Biomass characteristics may change subject to a salinity increase when treating high strength wastewater. In this study, the impact of salinity in a membrane bioreactor (MBR) was investigated for the treatment of produced water (PW). MBR was operated as a pre-treatment prior to nanofiltration (NF) and reverse osmosis (RO). Mixed PW, that was originated from different oil, gas, and oil-gas wells, were subjected to pre-treatment for 146â¯days including three different operational phases Low-salinity (~10â¯mS/cm), gradual increased salinity (10-40â¯mS/cm) and high salinity (~40â¯mS/cm). The results of this study showed that microorganisms could adapt using real wastewater and treat PW up to a certain level of the salinity. At high salinity levels of PW, the floc structure started to be disrupted and membrane fouling was accelerated. PCR-DGGE analysis confirmed the changes in microbial communities' composition in relation with high salinity. The results of the final treatment experiments presented that NF and RO treatment produced high-quality effluents that could be suitable for reuse.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Eliminação de Resíduos Líquidos
/
Reatores Biológicos
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Salinidade
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article