This study investigated the bioreactor performance, production of extracellular polymeric substance (EPS), and microbial activity a granulated sequencing batch reactor (SBR) by increasing graphene oxide nanoparticle (GO NP) concentration stepwise. The GO NPs reduced removal chemical oxygen demand (COD), ammonia, phosphorus, whereas nitrite nitrate contents effluent were kept stable during exper...

Aerobic granular sludge (AGS) with oversized diameter commonly affects its stability and pollutant removal. In order to effectively restrict the particle size of AGS, a sequencing batch reactor (SBR) spiny aeration device was put forward. A conventional SBR (R1) an (R2) treating tannery wastewater were compared in laboratory. The result indicates that from R2 smaller than R1 granulation. spines...

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 ...

A laboratory-scale anaerobic-anoxic/nitrification sequencing batch reactor (A2N-SBR) fed with domestic wastewater was operated to examine the effect of varying ratios of influent COD/P, COD/TN and TN/P on the nutrient removal. With the increased COD/P, the phosphorus removals exhibited an upward trend. The influent TN/P ratios had a positive linear correlation with the phosphorus removal effici...

This study investigated the implications of using two grades of limestone from a paper and pulp industry for neutralization of acid mine drainage (AMD) in a pilot sequencing batch reactor (SBR). In this regard, two grades of calcium carbonate were used to neutralize AMD in a SBR with a hydraulic retention time (including settling) of 100 min and a sludge retention time of 360 min, by simultaneo...

This study has demonstrated the applicability of a simple technology such as the sequencing batch reactor (SBR), operated with suspended biomass, to the aerobic biodegradation of a highly toxic compound, the pentachlorophenol (PCP). An enrichment of a microbial consortium, originated from the biomass of an urban wastewater treatment plant, was performed and 70 days were sufficient to achieve re...

A novel wastewater treatment technology, suitable for centralised and decentralised wastewater treatment and known as a pumped flow biofilm reactor (PFBR), has been developed and patented in the National University of Ireland, Galway (NUI Galway). This two-reactor-tank technology has been extensively tested at laboratory-scale and trialled at a number of sites for populations ranging from 15 – ...

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...

The enrichment of denitrifying phosphate accumulating organisms (DNPAOs) is the prerequisite for the denitrifying phosphate removal process. This study investigated the effect of nitrate concentration on the enrichment of DNPAOs was studied with batch experiments. The Sequencing Batch Reactor (SBR) was set-up with acetate as the sole carbon source. The addition of nitrate solution and the anoxi...

The use of the different external carbon source was investigated to enhance the short-cut nitrificationdenitrification (SCND) and the denitrifying phosphorus removal via nitrite (DPRN) using a sequencing batch reactor (SBR) to treat anaerobic supernatant. The SBR was fed with liquid effluent from the anaerobic co-digestion of waste activated sludge (WAS) and organic fraction of municipal solid ...