Impact of High-Nitrogen Leachate on Microfauna of Aerobic Granular Sludge.

  The microfauna communities present in aerobic granular sludge reactors (e.g., granule sludge batch reactor or GSBR) that are used to treat landfill leachate were studied to determine which taxons are useful as process performance indicators.

Microfauna community during pulp and paper wastewater treatment in a UNOX system.

This study characterized the microfauna community during treatment of pulp and paper wastewater in a UNOX system aerated with pure oxygen, and with a high organic loading rate (0.4±0.06kg BOD/kg MLSSday), low sludge retention time (3.

Effect of a static magnetic field on activated sludge community.

The aim of this study was to determine the effect of a static magnetic field (SMF) on the composition of activated sludge biocenosis. The experiment was carried out in two parallel bench scale Sequencing Batch Reactors (SBRs). Both SBRs were treated with dairy wastewater.

Experimental attempt at using Lecane inermis rotifers to control filamentous bacteria Eikelboom Type 0092 in activated sludge.

In laboratory experiments, the authors tested the efficacy of Lecane inermis rotifers in reducing the abundance of filamentous bacteria in activated sludge samples dominated by one filamentous bacterium, Eikelboom Type 0092. The experiment was conducted in three replicates and repeated three times at 1-month intervals. In all repetitions, rotifers were able to significantly reduce the density of bacterial filaments through predation.

The use of rotifers for limiting filamentous bacteria Type 021N, a bacteria causing activated sludge bulking.

The excessive growth of filamentous bacteria and the resultant bulking of activated sludge constitute a serious problem in numerous wastewater treatment plants. Lecane inermis rotifers were previously shown to be capable of reducing the abundance of Microthrix parvicella and Nostocoida limicola in activated sludge. In the present study, the effectiveness of four Lecane clones in reducing the abundance of Type 021N filamentous bacteria was investigated.

Limitation of sludge biotic index application for control of a wastewater treatment plant working with shock organic and ammonium loadings.

This study aimed to determine the relationship between activated sludge microfauna, the sludge biotic index (SBI) and the effluent quality of a full-scale municipal wastewater treatment plant (WWTP) working with shock organic and ammonium loadings caused by periodic wastewater delivery from septic tanks. Irrespective of high/low effluent quality in terms of COD, BOD5, ammonium and suspended solids, high SBI values (8-10), which correspond to the first quality class of sludge, were observed. High SBI values were connected with abundant taxonomic composition and the domination of crawling ciliates with shelled amoebae and attached ciliates.