Nutrient removal of ammonia rich effluents in a sequencing batch reactor

2004 ◽  
Vol 48 (11-12) ◽  
pp. 377-383 ◽  
Author(s):  
G. Yilmaz ◽  
I. Oztürk
Keyword(s):  
Carbon Source ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Calcium Acetate ◽  
Ammonia Removal ◽  
Operating Strategy ◽  
External Carbon Source ◽  
High Ammonia ◽  
Denitrification Process ◽  
Raw Wastewater

The aim of this study was to develop an appropriate operating strategy for ammonia removal of young landfill leachate in a lab-scale sequencing batch reactor, SBR. SBR was operated at five different phases by changing the aerobic cycle time and external carbon source during the denitrification process. SBR provides the opportunity to arrange the operating periods according to variable conditions such as wastewater characterization in order to optimise the performance of the system. By monitoring the variations occurring in each period during a full cycle an appropriate operating strategy may be defined. The main problem faced during the experimentation period particularly was due to use of raw wastewater with high NH4-N content as an external carbon source, as it affected denitrification performance to a great extent. This trouble was overcome if calcium acetate was used as the external carbon source instead of the raw wastewater. In case of using a suitable aeration period and the convenient external carbon source, high ammonia removals were observed.

Enhanced ammonium removal from liquid anaerobic digestion residuals in an advanced sequencing batch reactor system

2009 ◽  
Vol 60 (7) ◽  
pp. 1649-1660 ◽  
Author(s):  
M. Mayer ◽  
W. Smeets ◽  
R. Braun ◽  
W. Fuchs
Keyword(s):  
Anaerobic Digestion ◽  
Carbon Source ◽  
Sequencing Batch Reactor ◽  
Hydraulic Retention Time ◽  
Batch Reactor ◽  
Complete Removal ◽  
Organic Load ◽  
High Nitrogen Content ◽  
High Biological Activity ◽  
External Carbon Source

When treating effluents from anaerobic processing of organic wastes, the challenge lies in the large quantity of recalcitrant COD and in the high nitrogen content. The data presented in this study illustrate an advanced SBR concept that is able to significantly reduce the organic load. It was found that undigested mashed bio-waste bypassing the anaerobic digestion is highly suitable as an external carbon source to compensate deficiencies of readily biodegradable BOD required for denitrification. In order to utilize the carbon source as efficiently as possible, the SBR was operated in a mode by which nitrification/denitrification is achieved by a shortcut process using nitrite. This procedure reduced the requirement of an external carbon source to only 5% (v/v). Moreover, through an optimized SBR sequence for an influent concentration of 14,000 mg COD/l and 3,800 mg TN/l, nearly complete removal of nitrogen (>95%) was achieved. The average removal rates for COD and BOD were 83% and 86%, respectively. The applied hydraulic retention time (HRT) of the SBR was 6.8 days. The elevated temperature of 30–41°C in the reactor as a result of the high biological activity was advantageous in terms of enhanced reaction kinetics and also provided better process stability.

Exceptionally high-rate nitrification in sequencing batch reactors treating high ammonia landfill leachate

2001 ◽  
Vol 43 (3) ◽  
pp. 315-322 ◽  
Author(s):  
J. Doyle ◽  
S. Watts ◽  
D. Solley ◽  
J. Keller
Keyword(s):  
Sequencing Batch Reactor ◽  
Hydraulic Retention Time ◽  
Batch Reactor ◽  
Ammonia Removal ◽  
High Rate ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Removal Capacity ◽  
High Ammonia ◽  
Complete Nitrification

The nitrogen removal capacity of a suspended culture system treating mature land fill leachate was investigated. Leachate containing high ammonium levels of 300-900 mg N/L was nitrified in a bench scale sequencing batch reactor. Leachate from four different landfills was treated over a two year period for the removal of nitrogen. In this time, a highly specific nitrifying culture was attained that delivered exceptionally high rates of ammonia removal. No sludge was wasted from the system to increase the throughput and up to 13 g/L of MLSS was obtained. Settleability of the purely nitrifying biomass was excellent with SVI less than 40 mL/g, even at the high sludge concentrations. Nitrification rates up to 246 mg N/(L h) (5.91 g N/(L d)) and specific nitrification rates of 36 mg N/(gVSS h) (880 mg N/(gVSS d)) were obtained. The loading to the system at this time allowed complete nitrification of the leachate with a hydraulic retention time of only 5 hours. Following these successful treatability studies, a full-scale plant was designed and built at one of the landfills investigated.

scholarly journals Aerobic Sludge Granulation in a Full-Scale Sequencing Batch Reactor

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Jun Li ◽  
Li-Bin Ding ◽  
Ang Cai ◽  
Guo-Xian Huang ◽  
Harald Horn
Keyword(s):  
Extracellular Polymeric Substances ◽  
Sequencing Batch Reactor ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Full Scale ◽  
Granule Formation ◽  
Sludge Granulation ◽  
Aerobic Sludge ◽  
Raw Wastewater

Aerobic granulation of activated sludge was successfully achieved in a full-scale sequencing batch reactor (SBR) with 50,000 m3 d−1for treating a town’s wastewater. After operation for 337 days, in this full-scale SBR, aerobic granules with an average SVI30of 47.1 mL g−1, diameter of 0.5 mm, and settling velocity of 42 m h−1were obtained. Compared to an anaerobic/oxic plug flow (A/O) reactor and an oxidation ditch (OD) being operated in this wastewater treatment plant, the sludge from full-scale SBR has more compact structure and excellent settling ability. Denaturing gradient gel electrophoresis (DGGE) analysis indicated thatFlavobacteriumsp., uncultured beta proteobacterium, unculturedAquabacteriumsp., and unculturedLeptothrixsp. were just dominant in SBR, whereas uncultured bacteroidetes were only found in A/O and OD. Three kinds of sludge had a high content of protein in extracellular polymeric substances (EPS). X-ray fluorescence (XRF) analysis revealed that metal ions and some inorganics from raw wastewater precipitated in sludge acted as core to enhance granulation. Raw wastewater characteristics had a positive effect on the granule formation, but the SBR mode operating with periodic feast-famine, shorter settling time, and no return sludge pump played a crucial role in aerobic sludge granulation.

Advanced nitrogen removal via nitrite from municipal wastewater in a pilot-plant sequencing batch reactor

2009 ◽  
Vol 59 (12) ◽  
pp. 2371-2377 ◽  
Author(s):  
Q. Yang ◽  
X. H. Liu ◽  
Y. Z. Peng ◽  
S. Y. Wang ◽  
H. W. Sun ◽  
...  
Keyword(s):  
Carbon Source ◽  
Process Control ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Pilot Plant ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Nitrite Accumulation ◽  
Advanced Nitrogen Removal

To obtain economically sustainable wastewater treatment, advanced nitrogen removal from municipal wastewater and the feasibility of achieving and stabilizing short-cut nitrification and denitrification were investigated in a pilot-plant sequencing batch reactor (SBR) with a working volume of 54 m3. Advanced nitrogen removal, from summer to winter, with effluent TN lower than 3 mg/L and nitrogen removal efficiency above 98% was successfully achieved in pulsed-feed SBR. Through long-term application of process control in pulsed-feed SBR, nitrite accumulation reached above 95% at normal temperature of 25°C. Even in winter, at the lowest temperature of 13°C, nitrite was still the end production of nitrification and nitrite accumulation was higher than 90%. On the basis of achieving advanced nitrogen removal, short-cut nitrification and denitrification was also successfully achieved. Compare to the pulse-feed SBR with fixed time control, the dosage of carbon source and energy consumption in pulsed-feed SBR with process control were saved about 30% and 15% respectively. In pulsed-feed SBR with process control, nitrogen removal efficiency was greatly improved. Moreover, consumption of power and carbon source was further saved.

Denitrific ation of a high ammonia leachate using an external carbon source

1989 ◽  
Vol 10 (8) ◽  
pp. 707-716 ◽  
Author(s):  
R. Manoharan ◽  
S. Liptak ◽  
P. Parkinson ◽  
D. Mavinic ◽  
C. W. Randall
Keyword(s):  
Carbon Source ◽  
External Carbon Source ◽  
High Ammonia
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