Membrane bioreactor wastewater treatment plants reveal diverse yeast and protist communities of potential significance in biofouling

作者：Liebana Raquel; Arregui Lucia^*; Belda Ignacio; Gamella Luis; Santos Antonio; Marquina Domingo; Serrano Susana

来源：Biofouling, 2015, 31(1): 71-82.

DOI：10.1080/08927014.2014.998206

• wastewater treatment
• membrane bioreactor
• biofouling
• yeast biofilms
• protists
• predation

The yeast community was studied in a municipal full-scale membrane bioreactor wastewater treatment plant (MBR-WWTP). The unexpectedly high diversity of yeasts indicated that the activated sludge formed a suitable environment for them to proliferate, with cellular concentrations of 2.2 +/- 0.8 x 10(3) CFU ml(-1). Sixteen species of seven genera were present in the biological reactor, with Ascomycetes being the most prevalent group (93%). Most isolates were able to grow in a synthetic wastewater medium, adhere to polyethylene surfaces, and develop biofilms of variable complexity. The relationship between yeast populations and the protists in the MBR-WWTP was also studied, revealing that some protist species preyed on and ingested yeasts. These results suggest that yeast populations may play a role in the food web of a WWTP and, to some extent, contribute to membrane biofouling in MBR systems.

• 出版日期2015