scholarly journals Fish canning wastewater treatment in sequencing batch reactor with activated sludge

2020 ◽  
Vol 10 (2) ◽  
pp. 29-34
Author(s):  
Dijana Grgas ◽  
Marina Ugrina ◽  
Merima Toromanović ◽  
Jasmina Ibrahimpašić ◽  
Tea Štefanac ◽  
...  
Keyword(s):  
Organic Matter ◽  
Salt Concentration ◽  
Nutrient Removal ◽  
Sequencing Batch Reactor ◽  
Gradual Increase ◽  
Batch Reactor ◽  
Nitrite Reduction ◽  
Nitrite Accumulation ◽  
Ammonium Oxidation ◽  
Biological Performance

The biological performance of flocculent sludge in sequencing batch reactor for the treatment of fish canning wastewater was evaluated in terms of organic matter and nutrient removal by gradual increase of salt concentration in the nitritation-denitritation process. Salinity negatively affected the biological system performance in a way that reduced organic and nutrient removal. The removal efficiency of organic matter and nitrogen showed good performance below 20 g NaCl/L, while phosphate accumulating organisms activity was deteriorated and declined during whole experiment. Nitrogen removal occurred as ammonium oxidation with nitrite accumulation. Nitrite reduction was not affected by salt concentration.

Development and optimization of a sequencing batch reactor for nitrogen and phosphorus removal from abattoir wastewater to meet irrigation standards

2010 ◽  
Vol 61 (8) ◽  
pp. 2105-2112 ◽  
Author(s):  
Maite Pijuan ◽  
Zhiguo Yuan
Keyword(s):  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
P Uptake ◽  
Nitrite Accumulation ◽  
N2o Emissions ◽  
Ammonium Oxidation ◽  
Biological Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Abattoir Wastewater

A sequencing batch reactor (SBR) was used for the treatment of abattoir wastewater to produce effluent with desirable nitrogen and phosphorus levels for irrigation. The SBR cycle consisted of an anaerobic phase with wastewater feeding, a relatively short aerobic period (allowing full ammonium oxidation), a second anoxic period with feeding, followed by settling and decanting. This design of operation allowed biological nitrification and denitrification via nitrite, and therefore with reduced demand for aeration and COD for nitrogen removal. The design also allowed ammonium, rather than oxidized nitrogen, being the primary nitrogen species in the effluent. Biological phosphorus removal was also achieved, with an effluent level desirable for irrigation. A high-level of nitrite accumulation (40 mg N/L) in the reactor caused inhibition to the biological P uptake. This problem was solved through process optimization. The cycle time of the SBR was reduced, with the wastewater load per cycle also reduced, while the daily hydraulic loading maintained. This modification proved to be an effective method to ensure reliable N and P removal. N2O accumulation was measured in two experiments simulating the anoxic phase of the SBR and using nitrite and nitrate respectively as electron donors. The estimated N2O emissions for both experiments were very low.

Rapid start-up and efficient long-term nitritation of low strength ammonium wastewater with a sequencing batch reactor containing immobilized cells

2014 ◽  
Vol 70 (3) ◽  
pp. 517-523 ◽  
Author(s):  
Hammad Khan ◽  
Wookeun Bae
Keyword(s):  
Sequencing Batch Reactor ◽  
Immobilized Cells ◽  
Batch Reactor ◽  
Linear Increase ◽  
Nitrite Accumulation ◽  
Ammonium Oxidation ◽  
Do Concentration ◽  
Low Strength ◽  
In The Beginning

Major concerns about nitritation of low-strength ammonium wastewaters include low ammonium loading rates (ALRs) (usually below 0.2 kg/m3-d) and uncertainty with the long-term stability of the process. The purpose of this study was to test a sequencing batch reactor filled with cell-immobilized polyethylene glycol (PEG) pellets (∼2 mm in size) to see if it could achieve efficient and stable nitritation under various environmental conditions. The sequencing batch reactor (SBR) was fed with synthetic ammonium wastewater of 30 ± 2 mg-N/L and pH 8 ± 0.05, maintaining the dissolved oxygen (DO) concentration at 1.7 ± 0.2 mg/L and the temperature at 30 ± 1 °C. The reaction was easily converted to partial nitrification mode within a month by feeding a relatively high ammonium substrate (∼100 mg-N/L) in the beginning. We observed stable nitritation over 300 days with high ALRs (as high as ∼1.1 kg-N/m3-d), nitrite accumulation rates (mostly over 97%), and ammonium removal rates (mostly over 95%). DO was the major limiting substrate when the DO concentration was below ∼4 mg/L and the NH4+-N concentration was above ∼5 mg/L, giving an almost linear increase in the ammonium oxidation rate with the bulk DO increase. Low temperatures mainly affected the reaction rate, which could be compensated for by increasing the pellet volume (i.e. biomass). Our results demonstrated that an SBR filled with small cell-immobilized PEG pellets could achieve very efficient and stable nitritation of a low-strength ammonium wastewater.

Effect of inorganic carbon on anaerobic ammonium oxidation enriched in sequencing batch reactor

2008 ◽  
Vol 20 (8) ◽  
pp. 940-944 ◽  
Author(s):  
Dexiang LIAO ◽  
Xiaoming LI ◽  
Qi YANG ◽  
Guangming ZENG ◽  
Liang GUO ◽  
...  
Keyword(s):  
Sequencing Batch Reactor ◽  
Inorganic Carbon ◽  
Batch Reactor ◽  
Anaerobic Ammonium Oxidation ◽  
Ammonium Oxidation

scholarly journals Dynamic control of nutrient-removal from industrial wastewater in a sequencing batch reactor, using common and low-cost online sensors

2015 ◽  
Vol 73 (4) ◽  
pp. 740-745 ◽  
Author(s):  
Jan Dries
Keyword(s):  
Activated Sludge ◽  
Nutrient Removal ◽  
Industrial Wastewater ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Low Cost ◽  
Dynamic Control ◽  
Oxygen Demand ◽  
Oxidation Reduction ◽  
Oxidation Reduction Potential

On-line control of the biological treatment process is an innovative tool to cope with variable concentrations of chemical oxygen demand and nutrients in industrial wastewater. In the present study we implemented a simple dynamic control strategy for nutrient-removal in a sequencing batch reactor (SBR) treating variable tank truck cleaning wastewater. The control system was based on derived signals from two low-cost and robust sensors that are very common in activated sludge plants, i.e. oxidation reduction potential (ORP) and dissolved oxygen. The amount of wastewater fed during anoxic filling phases, and the number of filling phases in the SBR cycle, were determined by the appearance of the ‘nitrate knee’ in the profile of the ORP. The phase length of the subsequent aerobic phases was controlled by the oxygen uptake rate measured online in the reactor. As a result, the sludge loading rate (F/M ratio), the volume exchange rate and the SBR cycle length adapted dynamically to the activity of the activated sludge and the actual characteristics of the wastewater, without affecting the final effluent quality.

Anaerobic ammonium oxidation by Nitrosomonas spp. and anammox bacteria in a sequencing batch reactor

2009 ◽  
Vol 90 (2) ◽  
pp. 967-972 ◽  
Author(s):  
Pongsak (Lek) Noophan ◽  
Siriporn Sripiboon ◽  
Mongkol Damrongsri ◽  
Junko Munakata-Marr
Keyword(s):  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Anaerobic Ammonium Oxidation ◽  
Anammox Bacteria ◽  
Ammonium Oxidation
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