BACKGROUND Two hybrid biofilm reactors, an integrated fixed-film activated sludge–sequencing batch reactor (IFAS-SBR) and a SBR with mixture of sludge granules, were used to reach enhanced nitrogen removal based on the anaerobic ammonium oxidation (anammox) process under intermittent aeration. RESULTS IFAS-SBR reached more stable performance after rapid start-up period 25 days, it showed reliab...

Water treatment has become a source of concern as new pollutants and higher volumes of waste water must be treated. Emerging biological approaches, namely the use of bioreactors, for cleaning processes have been introduced. The use of bioreactors requires the development of efficient monitoring tools, preferably with real-time measurements. In this work, a couple of flow injection systems were ...

The large-scale application of veterinary antibiotics in livestock industry makes swine wastewater an important source of antibiotics pollution. This work investigated the degradation of six selected antibiotics, including five sulfonamides and one macrolide, by Fenton's reagent in swine wastewater pretreated with sequencing batch reactor (SBR). The dosing mode and practical dosage of Fenton's ...

The inhibition effect of rapid variations pH in wastewater on activated sludge was investigated laboratory-scale sequencing batch reactors (SBR). toxic influence 6.5 and 8.5 examined. experiment with preferable to formation high FA concentration showed a low risk second step nitrification (conversion nitrites nitrates). However, the reactor at first-step ammonia nitrites) caused by FNA formatio...

This study presents a rapid method on how to speed up aerobic granular sludge (AGS) cultivation and ensure excellent stable removal performance during bioreactor operation for domestic wastewater treatment. new strategy consists of start-up the using only anaerobic (AnGS) as seed feeding with crude sewage extracted from full-scale Extended Aeration Plant. experiment used 2.5 L lab-scale sequenc...

A successful enhanced biological phosphorus removal (EBPR) was observed in both anaerobic-aerobic sequencing batch reactor (An-Ox SBR) to induce growth of phosphorus accumulating organism (PAO) and anaerobic-anoxic (An-Ax) SBR to induce growth of denitrifying PAO (DPAO). Although the EBPR performance of An-Ox SBR was higher by 11.3% than that of An-Ax SBR, specific phosphorus release rates in t...

Abstract: The Sequencing Batch Reactor (SBR) is a widely used process for biological removal of nutrients (nitrogen and phosphorus) from wastewater. It is normally operated on a fixed switching schedule, resulting in an inefficient process operation. This paper proposes a switching strategy based on an adaptive fuzzy inferential engine. In this way the duration of each phase is limited to the t...

In this study, the effect of sludge retention time (SRT) on oxic-settling-anoxic (OSA) process was determined using a sequencing batch reactor (SBR) attached to external aerobic/anoxic reactors. The SRT of the external reactors was varied from 10 to 40d. Increasing SRT from 10 to 20d enhanced volatile solids destruction in the external anoxic reactor as evidenced by the release of nutrients, ho...

Implementation of partial nitritation anammox (PNA) in the mainstream (municipal wastewater treatment) is still under investigation. Microbial community structure and reactor type can influence the performance of PNA reactor; yet, little is known about the role of the community composition of the inoculum and the reactor configuration under mainstream conditions. Therefore, this study investiga...