SBR aeration Articles
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Ammonium reduction from piggery wastewater using immobilized ammonium-reducing bacteria with a full-scale sequencing batch reactor on farm
This work aims to evaluate the efficiency of ammonium removal from piggery wastewater by an intermittent aeration (IA) sequencing batch reactor (SBR) with immobilized NH4+-reducing bacteria under mesophilic conditions. When a 20-L bench-scale SBR with 11% (v/v) of alginate beads containing NH4+-reducing bacteria was used, removal efficiency of NH4+ was 63% ...
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The influence of aeration rate on partial nitrification in sequencing batch reactor
Partial nitrification was investigated in Sequencing Batch Reactor (SBR) under aeration of 100, 500, 1000 and 1600 ml min−1. The biomass concentration was about 1.7 g l−1. When the ratio of alkalinity (mg l−1) to NH4+ -N (mg l−1) was 7.14 : 1, pH and DO would both increase dramatically after ammonia oxidation finished. Through monitoring and controlling the variation of pH and DO in the reactor, ...
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N2O emission from full-scale urban wastewater treatment plants: a comparison between A2O and SBR
The emission of nitrous oxide (N2O) from full-scale anoxic/anaerobic/oxic (A2O) and sequencing batch reactor (SBR) processes was measured to evaluate N2O emission from urban wastewater treatment plants (WWTPs). The results showed that N2O flux in the A2O WWTP followed an order of A2O-oxic zone > aerated grit tank >> A2O-anaerobic zone > A2O-anoxic zone > final ...
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Foam control in a food processing wastewater SBR treatment unit case study
Cost-Effective Biological Foam Control Using Microcat DF Defoamer The sequencing batch reactor activated sludge plant (SBR) operating on a potato processing wastewater is experiencing a severe foaming episode. The foam can reach three inches in depth reducing the efficiency of the surface aerators and causing odors. The treatment system consists of primary filtration and an SBR aeration ...
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A comparative study of an up-flow aerobic/anoxic sludge fixed film bioreactor and sequencing batch reactor with intermittent aeration in simultaneous nutrients (N, P) removal from synthetic wastewater
The performance of two bench scale activated sludge reactors with two feeding regimes, continuous fed (an up-flow aerobic/anoxic sludge fixed film (UAASFF) bioreactor) and batch fed (sequencing batch reactor (SBR)) with intermittent aeration, were evaluated for simultaneous nutrients (N, P) removal. Three significant variables (retention/reaction time, chemical oxygen demand (COD): N ...
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Biological waste management of leather tannery effluents in India: current options and future research needs
This paper reviews the major biological treatment methods applied for tannery effluents in India. Anaerobic methods and activated sludge process have been the preferred treatment options. Sequencing batch reactor process holds promise for tannery effluents but the technology is yet to see the light of the day in India. Design of aerobic systems needs major overhaul through modelling approaches of ...
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Treatment of synthetic kraft evaporator condensate using thermophilic and mesophilic membrane aerated biofilm reactors
A comparative study on the treatment of synthetic kraft evaporator condensate was conducted using thermophilic (55°C) and mesophilic (30°C) membrane aerated biofilm reactors (MABRs) and sequencing batch reactors (SBRs) for 8 months. Under tested conditions, a chemical oxygen demand (COD) removal efficiency of 80–95% was achieved with both thermophilic and mesophilic MABRs and SBRs. The COD ...
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The effects of different aeration patterns on aerobic granulation
In this study, the effects of aeration patterns in terms of intra- (S1) and extra- (S2) aeration on aerobic granulation were investigated. Granules developed in S1 were retarded due to the high shear force of highly mixed air bubbles, and they were more solid while the S2 granules were porous with many distinct pores and channels. Mature granules in two series had comparable specific oxygen ...
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Bacterial diversity in antibiotic wastewater treatment
The bacterial diversity of an antibiotic industrial wastewater treatment system was analyzed to provide the information required for further optimization of this process and for identification of bacterial strains that perform improved degradation of antibiotic industrial wastewater. The total bacterial DNA of samples collected at three stages (aeration, precipitation, and idle) during the ...
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Phosphorus release and uptake during start-up of a covered and non-aerated sequencing batch reactor with separate feeding of VFA and sulfate
This study explored a sulfur cycle-associated biological phosphorus (P) removal process in a covered and non-aerated sequencing batch reactor (SBR) fed with volatile fatty acid (VFA) and sulfate separately. During the 60-day start-up, both phosphate release and uptake rates increased, while poly-phosphate cyclically increased and decreased accordingly. The P-release and P-uptake rates were ...
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Sludge reduction by direct addition of chlorine dioxide into a sequencing batch reactor under operational mode of repeatedly alternating aeration/non-aeration
The effect of direct addition of chlorine dioxide (ClO2) into a repeatedly alternating aeration/non-aeration sequencing batch reactor (SBR) on its sludge reduction and process performance was investigated. The experimental results showed that the sludge reduction efficiency was 32.9% and the observed growth yield (Yobs) of SBR was 0.11 kg VSS (volatile suspended solids) /kg COD (chemical ...
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Membrane Bioreactor for National Park
The problem: Assateague Island is a barrier island that stretches from the Eastern shore of Maryland down Atlantic coast to Virginia. The island is a National Park, administered by the National Park Service, under the National Seashore division. Assateague Island is a vital resting and feeding area for birds and also is home to more than 300 wild ponies. The park receives about 1 million ...
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New Fluidyne ISAM - Integrated Surge Anoxic Mix SBR Excels in Port Hood, Nova Scotia - Case Study
We are proud to announce that Fluidyne's SBR solution was the Atlantic Canada Wastewater Treatment Plant of the Year for: Client: Municipality of the County of Inverness Solution: Sequencing Batch Reactor (SBR) Background: The rural coastal community of Port Hood, N.S. with a population of around 1300 people, like many other small Nova Scotia communities has aging municipal infrastructure. In ...
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Norwood, Ontario; ISAM Integrated Surge Anoxic Mix - Case Study
Client: Norwood, Ontario Solution: BNR Background: NORWOOD, ONTARIO ISAM (Integrated Surge Anoxic Mix) Increases Plant Capacity While Reducing Operational Cost and Improving Effluent Quality The Township of Asphodel-Norwood (Township) is located in central-eastern Ontario in Peterborough County. Population growth in the community meant that the treatment capacity of the Norwood Water ...
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Injecting Innovation Into The Food And Beverage Industry
Not all water treatment needs are the same. That’s why it’s imperative to work with those that understand the subtle differences that make each industry unique. For food and beverage companies, that means aligning with a company focused on oxygen transfer with a track record of innovation in jet aeration and mixing. Water Online spoke with KLa Systems to discuss its success within ...
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