Ammonium and nitrite levels in water are crucial for fish health preservation growth maintenance freshwater aquaculture farms, limiting recirculation. The aim of the present work was evaluation comparison two granular sludge reactors which were operated to treat streams at laboratory-scale: an Aerobic Granular Sludge - Sequencing Batch Reactor (AGS-SBR) a Continuous Flow (CFGR). Both units fed ...

Abstract This study compares, based on mathematical modelling, continuous-flow activated sludge processes (CAS) and sequencing batch reactors (SBR). The steady-state or periodic of CAS SBR is compared for a feed composed readily slowly biodegradable substrates, carbon nitrogen removal. simulations are carried out different values the SRT (solids residence time), HRT (hydraulic number cycles int...

Fibreboard production is one of the most important industrial activities in Galicia (Spain). Great amounts of wastewater are generated, with properties depending on the type of wood, treatment process, final product and water reusing, among others. These effluents are characterized by a high chemical oxygen demand (COD), low pH and nutrients limitation. Aerobic and anaerobic processes have been...

Algae-based wastewater treatment is a promising technology with various applications for excess biomass such as biofertilizer production or valuable elements extraction. The benefits of the have been discussed larger plants (WWTPs), but use microalgae in decentralized has barely reported. current study screens possible resource recovery potential onsite technology, which adds algae-based post-t...

A benchmark for the test of control scenarios of sequencing batch reactors (SBR) used for wastewater treatment is proposed. The plant layout includes a buffer tank for wastewater storage in front of the SBR. Performance criteria based mainly on the quality of the effluent are given. The use of the benchmark is illustrated by the study of the effects on the effluent of the control of dissolved o...

In this research, the effects of different color intensities, anoxic + anaerobic times and types of substrate on color removal effectiveness were studied using 16-litre bench scale sequencing batch reactor (SBR) anoxic + anaerobic/aerobic models. The systems were fed with a synthetic wastewater containing 500 mg/l of COD, 50 mg/l of N, 15 mg/l of P along with 10, 40 and 80 mg/l of reactive diaz...

The effectiveness of polyhydroxyalkanoates (PHA) production with mixed microbial cultures (MMC) largely depends on the selection PHA-storing microorganisms, conventionally performed in sequencing batch reactors (SBR). These, although easily allow establishment required feast and famine (FF) regime, can represent a factor cost increase when process is scaled up. Here, novel continuous-flow for M...

The effect of free ammonia (NH3 or FA), free nitrous acid (HNO2 or FNA), and total alkalinity (TA) on the performance of a partial nitrification (PN) sequencing batch reactor (SBR) treating anaerobically pretreated pig slurry was studied. The SBR was operated under alternating oxic/anoxic (O/A) conditions and was fed during anoxic phases. This strategy allowed using organic matter to partially ...

In monitoring and controlling wastewater treatment processes, on-line information of nutrient dynamics is very important. However, these variables are determined with a significant time delay. Although the final effluent quality can be analyzed after this delay, it is often too late to make proper adjustments. In this paper, a neural network approach, a software sensor, was proposed to overcome...

Full-scale wastewater treatment facilities are not able to prevent microplastics (MPs) from discharging into natural waters and they also associated with the land application of sludge. This study evaluates distribution microfibers (MFs) in a lab-scale sequencing batch reactor (SBR) fed by synthetic (SW) for 93 days. The MFs were analyzed through optical microscopy mixed liquor (ML) effluent, s...