Biofilm formation and granule properties in anaerobic digestion at high salinity

Water Research
M C GaglianoJ B van Lier

Abstract

For the anaerobic biological treatment of saline wastewater, Anaerobic Digestion (AD) is currently a possibility, even though elevated salt concentrations can be a major obstacle. Anaerobic consortia and especially methanogenic archaea are very sensitive to fluctuations in salinity. When working with Upflow Sludge Blanket Reactor (UASB) technology, in which the microorganisms are aggregated and retained in the system as a granular biofilm, high sodium concentration negatively affects aggregation and consequently process performances. In this research, we analysed the structure of the biofilm and granules formed during the anaerobic treatment of high salinity (at 10 and 20 g/L of sodium) synthetic wastewater at lab scale. The acclimated inoculum was able to accomplish high rates of organics removal at all the salinity levels tested. 16S rRNA gene clonal analysis and Fluorescence In Situ Hybridization (FISH) analyses identified the acetoclastic Methanosaeta harundinacea as the key player involved acetate degradation and microbial attachment/granulation. When additional calcium (1 g/L) was added to overcome the negative effect of sodium on microbial aggregation, during the biofilm formation process microbial attachment and acetate...Continue Reading

Citations

Jul 18, 2018·Frontiers in Microbiology·Maria C GaglianoCaroline M Plugge
Jul 25, 2019·International Journal of Molecular Sciences·Wen YinJin He
Jun 26, 2020·Frontiers in Microbiology·Anna Christine TregoGavin Collins
Mar 17, 2020·Frontiers in Microbiology·Maria Cristina GaglianoCaroline M Plugge
Oct 17, 2018·Environmental Science and Pollution Research International·Yi XuLingzhan Miao
Oct 30, 2020·Frontiers in Microbiology·Anna DolomanCharles D Miller
Mar 17, 2021·Marine Pollution Bulletin·Rongjun ShiQingzhi Zhu
Jul 18, 2020·Environmental Research·Qian ChenDawn E Holmes
May 15, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Miao ZhangYafeng Li
Jul 17, 2021·Journal of Environmental Management·Cristiane Arruda OliveiraMárcia Helena Rissato Zamariolli Damianovic
Sep 12, 2019·Environmental Science & Technology·Nannan ZhaoYifeng Zhang
Jan 11, 2020·New Biotechnology·Maria Cristina GaglianoCaroline M Plugge

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