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...

background: the disposal the wastewater sugar extraction to the rivers and environment cause contamination and is considered as a threat to the marine life and the environment. thus, treatment of the wastewater is necessary. investigating the reduction of the pollution load of cane industry with anaerobic sequencing batch biofilm reactor (asbbr) in the laboratory scale is the purpose of this st...

The objectives of this study are to evaluate the efficiency of removal of hexavalent chromium (Cr(VI)) in a sequencing batch reactor (SBR) and to ascertain the fate of Cr(VI) in the treatment process. An SBR was operated with the FILL, REACT, SETTLE, DRAW and IDLE periods in the time ratio of 2:12:2:1.5:6.5 for a cycle time of 24 h. The study was divided into 5 phases with the addition of 0.5, ...

A modified ASM1 model was developed to simulate nitritation/denitritation in a sequencing batch reactor (SBR) treating sludge reject water. The model was validated using real data from a pilot SBR. The effect of a number of operating parameters on the nitritation/denitritation efficiency was tested including, among others, the volumetric nitrogen loading rate (vNLR), the solids retention time (...

Partial nitritation was pointed out as the key step to implement autotrophic nitrogen removal processes at low temperature. This study investigated initiation and maintenance of a process with simultaneous COD in sequencing batch reactor (SBR) run 15 °C fed primary settled urban wastewater characterized by 42 ± 10 mg TOC/L 45 4 NH4+-N/L. A nitrite accumulation ratio nearly 100% observed long-te...

A Sequencing Batch Reactor (SBR) with activated sludge was operated synthetic wastewater containing ibuprofen (IBU) to investigate the biomass stress-responses under long-term IBU exposure. There were 3 different phases: phase I as control without for 56 days, II (40 days), and III (60 days) at 10 5 mg L?1 each. The overall performance of SBR well extracellular polymeric substances (EPS) in ter...

Previous research has suggested that enhanced biological phosphorus removal (EBPR) from wastewater can be achieved under continuous aerobic conditions over the short term. However, little is known how environmental conditions might affect aerobic EBPR performance. Consequently we have investigated the impact of temperature, pH and dissolved oxygen (DO) concentrations on EBPR performance under s...

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...

The growing production of coke and, consequently, wastewater is a significant problem for the environment. Coke wastewater, because it contains high amounts toxic substances, classified as an extremely hazardous industrial wastewater. treatment such requires combination advanced physicochemical and biological methods. aim research was to investigate effectiveness application ultrasonic disinteg...