Membrane biofouling by chlorine resistant Bacillus spp.: effect of feedwater chlorination on bacteria and membrane biofouling
| Autor: | N.K. Saha, Soumya Haldar, Gopal Bhojani, Sweta Binod Kumar |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Biofouling
Ultrafiltration Bacillus chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Aquatic Science 01 natural sciences Applied Microbiology and Biotechnology Water Purification 020401 chemical engineering RNA Ribosomal 16S polycyclic compounds Chlorine 0204 chemical engineering Reverse osmosis 0105 earth and related environmental sciences Water Science and Technology biology Chemistry Membrane fouling Membranes Artificial biology.organism_classification Membrane Environmental chemistry Bacteria |
| Zdroj: | Biofouling. 34:426-439 |
| ISSN: | 1029-2454 0892-7014 |
| Popis: | In this study, bacteria isolated from a lake were characterised for their chlorine resistivity and the effects of chlorination on growth, mortality, protein expression and attachment propensity towards membranes. Biofouling and membrane performance were analysed. All isolated chlorine resistant strains, characterised by 16s rRNA gene sequencing, belonged to the genus Bacillus. Chlorination caused limited effects on bacterial growth and mortality. B. safensis and B. lechinoformis suffered the maximum effects due to chlorination. Live-to-dead ratios immediately after chlorination were above 1.3, with some exceptions. The membrane pure water flux recovery was highly strain dependent. Irreversible membrane fouling was observed with B. aquimaris. Membrane flux decreased substantially during ultrafiltration of water containing chlorine resistant bacteria. |
| Databáze: | OpenAIRE |
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