Aerobic granulation of activated sludge was successfully achieved in a full-scale sequencing batch reactor (SBR) with 50,000 m(3) d(-1) for treating a town's wastewater. After operation for 337 days, in this full-scale SBR, aerobic granules with an average SVI30 of 47.1 mL g(-1), diameter of 0.5 mm, and settling velocity of 42 m h(-1) were obtained. Compared to an anaerobic/oxic plug flow (A/O)...

BACKGROUND, AIM, AND SCOPE Fishery wastewater treatment can be compromised due to seasonal production. The use of sequencing batch reactors is not completely successful, despite flexibility being one of the principal advantages. Most research on activated sludge is performed using synthetic wastewater to ensure a stable and constant feed. The current work compared biomass morphology and settlin...

Over a period of 227 days properties of activated sludge grown in an sequencing batch reactor (SBR) operated under stable conditions were analyzed. Settling properties (sludge volume index (SVI)) of the activated sludge were compared with on-line measurements of floc size and size distribution obtained by using a laser light scattering technique (Malvern Mastersizer/S, Malvern, UK), and with me...

Thraustochytrium striatum was selected as a model protist to test the possibility of granulation for its good potential organic waste valorization. Initially, only selective settling velocity 9 m h−1 applied in sequential batch reactor (SBR) with minimal progress after three months. After famine condition introduced into SBR feast-to-famine duration ratio 0.2 by extending cycle time and lowerin...

For the last years, artificial intelligence (AI) approaches have become useful tools in environmental engineering. Here, one relevant application area is the optimization of wastewater treatment plants (WWTP). In this paper we present a tool for real-time control (RTC) and decision support, which has been tailored to sequencing batch reactors (SBR) plants. The tool, which is able to predict the...

Aerobic granular sludge is attractive for high-rate biological wastewater treatment. Biomass wash-out conditions stimulate the formation of aerobic granules. Deteriorated performances in biomass settling and nutrient removal during start-up have however often been reported. The effect of wash-out dynamics was investigated on bacterial selection, biomass settling behavior, and metabolic activiti...

BACKGROUND The performance of microalgal and bacterial systems devoted to wastewater treatment might be limited by the poor settling biomass inhibition nitrifying bacteria under high irradiance conditions. This work implemented a photo-sequencing batch bioreactor (PSBR) treating medium- low-strength wastewaters. impact short time on formation microalgal–bacterial aggregates (MABAs) was evaluate...