Start-up of a full-scale deammonification SBR-treating effluent from digested sludge dewatering

2014 ◽  
Vol 71 (4) ◽  
pp. 553-559 ◽  
Author(s):  
Susanne Lackner ◽  
Konrad Thoma ◽  
Eva M. Gilbert ◽  
Wolfgang Gander ◽  
Dieter Schreff ◽  
...  
Keyword(s):  
Batch Reactor ◽  
Full Scale ◽  
Activity Measurement ◽  
Stable Operation ◽  
Turnover Rates ◽  
Reactor Performance ◽  
Sludge Dewatering ◽  
Aeration Time ◽  
Batch Tests ◽  
Start Up

This study shows the start-up and operation of a full-scale sequencing batch reactor (SBR) with a volume of 550 m³ for deammonification of reject water from sludge dewatering over the first 650 days of operation. The SBR was operated with discontinuous aeration and achieved an optimum of around 85% of ammonium removal at a load of 0.17 kg m−3 d−1. The application of batch tests for the activity measurement of aerobic ammonium and nitrite oxidizing bacteria and anaerobic ammonium oxidizing bacteria were proven to support the identification of setbacks in reactor operation. Furthermore, the calculation of the oxygen uptake rates from online oxygen measurements helped to explain the overall reactor performance. The aeration regime is a key parameter for stable operation of such an SBR for deammonification. At aeration/non-aeration time ranges from 6–9 min, the best results with respect to turnover rates and low nitrate production were achieved. Compared with the nitrification/denitrification SBR operated in parallel with methanol as the carbon source, a significant reduction in costs for energy and chemicals was achieved. The costs for maintenance slightly increased.

Full-scale granular sludge Anammox process

2007 ◽  
Vol 55 (8-9) ◽  
pp. 27-33 ◽  
Author(s):  
W.R. Abma ◽  
C.E. Schultz ◽  
J.W. Mulder ◽  
W.R.L. van der Star ◽  
M. Strous ◽  
...  
Keyword(s):  
Granular Sludge ◽  
Full Scale ◽  
High Density ◽  
Stable Operation ◽  
Loading Rates ◽  
Start Up ◽  
Anammox Process ◽  
Anammox Granular Sludge

The start-up of the first full scale Anammox reactor is complete. The reactor shows stable operation, even at loading rates of 10 kg N/m3.d. This performance is the result of the formation of Anammox granules, which have a high density and settling velocities exceeding 100 m/h. With this performance, the Anammox granular sludge technology has been proven on full scale.

Performance and membrane fouling in a pilot scale SBR process coupled with membrane

2003 ◽  
Vol 47 (1) ◽  
pp. 139-144 ◽  
Author(s):  
H. Shin ◽  
S. Kang
Keyword(s):  
Membrane Fouling ◽  
Batch Reactor ◽  
Pilot Scale ◽  
Nitrifying Bacteria ◽  
Endogenous Respiration ◽  
Aeration Time ◽  
Membrane Flux ◽  
Start Up ◽  
Cell Test ◽  
Stirred Cell

The performance of the pilot-scale submerged membrane coupled with sequencing batch reactor (SM-SBR) for upgrading effluent quality was investigated in this study. The reactor was operated with 3-hour cycle with alternating anoxic and aerobic conditions to treat organics, nitrogen and phosphate. Despite various influent characteristics, COD removal was always higher than 95%. Sufficient nitrification was obtained within a few weeks after start-up and during the stable period, complete nitrification occurred despite short aeration time. Total nitrogen (TN) removal efficiency was reached up to 85%. Membrane flux was critical for TN removal so that the decrease of flux by membrane fouling led to increase of HRT, and it caused the endogenous respiration of microorganisms such as nitrifying bacteria. The stirred cell test revealed the significant role of the soluble fraction in membrane permeability and dissolved solids played a major role in the short-term fouling mechanism. The cake resistance by the soluble COD fraction of supernatant or soluble microbial products (SMP) was investigated as a major part of total resistance.

Effect of substrate-seed mixing and leachate recirculation on solid state digestion of biowaste

2000 ◽  
Vol 41 (3) ◽  
pp. 255-262 ◽  
Author(s):  
A.H.M. Veeken ◽  
B.V.M. Hamelers
Keyword(s):  
Solid State ◽  
Mass Transport ◽  
Volatile Fatty Acids ◽  
Batch Reactor ◽  
Mechanistic Model ◽  
Hydrolysis Rate ◽  
Reactor Performance ◽  
Leachate Recirculation ◽  
Start Up ◽  
Recirculation Rate

Lab-scale experiments were performed and a mechanistic model was developed to simulate the solid state digestion of biowaste in a batch reactor. Both experiments and model showed that the substrate-seed mixing degree and leachate recirculation rate have a strong effect on the reactor performance. This is due to mass transport limitations of volatile fatty acids (VFA) within the biowaste-seed bed. In that case two regions are developed in the digester, so-called acidogenic and methanogenic pockets. Limitations in mass transport will prevent irreversible acidification during start-up of the reactor because whereas high VFA concentration is met in the fresh waste pockets, the VFA concentration in the methanogenic pockets will remain low. However, accumulation of VFA in the acidogenic pockets will reduce the hydrolysis rate of biowaste due to inhibition by VFA. Moreover, experiments and simulations showed that the reactor performance can be improved by varying the leachate recirculation rate or applying sequential batch operation.

Nitrogen removal from sludge water with SBR process: start-up of a full-scale plant in the municipal wastewater treatment plant at Ingolstadt, Germany

2004 ◽  
Vol 50 (10) ◽  
pp. 51-58 ◽  
Author(s):  
M.J. Vallés-Morales ◽  
J.A. Mendoza-Roca ◽  
A. Bes-Pií ◽  
A. Iborra-Clar
Keyword(s):  
Municipal Wastewater ◽  
Batch Reactor ◽  
Nitrogen Concentration ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Full Scale ◽  
Waste Water Treatment Plant ◽  
Ammonium Concentration ◽  
Anaerobic Sludge ◽  
Start Up

The sludge water obtained from the dewatering processes following anaerobic sludge digestion contains high levels of ammonia. This sludge water is generally returned to the beginning of the waste water treatment plant process, thereby significantly increasing the nitrogen load on the biological process. In this project, the start-up of a full-scale sequencing batch reactor (SBR) process to separately treat the aforementioned sludge water is studied. Two parallel SBRs were operated over 8 hour cycles. The duration of the start-up was approximately 100 days until a hydraulic load of 225 m3/d was reached for each SBR. This paper presents the results of the start-up, highlighting the change in nitrogen concentration with time and the effect of other parameters such as temperature and suspended solids in that period. Following the project period of operation, the ammonium concentration was reduced by more than 95% on average.

Full-scale comparison of N2O emissions from SBR N/DN operation versus one-stage deammonification MBBR treating reject water – and optimization with pH set-point

2019 ◽  
Vol 79 (8) ◽  
pp. 1616-1625 ◽  
Author(s):  
L. Kanders ◽  
J-J. Yang ◽  
C. Baresel ◽  
J. Zambrano
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment Plants ◽  
Feeding Strategy ◽  
Batch Reactor ◽  
Full Scale ◽  
Biofilm Reactor ◽  
N2o Emissions ◽  
Set Point ◽  
Reject Water ◽  
Aeration Time

Abstract To be able to fulfill the Paris agreement regarding anthropogenic greenhouse gases, all potential emissions must be mitigated. Wastewater treatment plants should aim to eliminate emissions of the most potent greenhouse gas, nitrous oxide (N2O). In this study, these emissions were measured at a full-scale reject water treatment tank during two different operation modes: nitrification/denitrification (N/DN) operating as a sequencing batch reactor (SBR), and deammonification (nitritation/anammox) as a moving bed biofilm reactor (MBBR). The treatment process emitted significantly less nitrous oxide in deammonification mode 0.14–0.7%, compared to 10% of total nitrogen in N/DN mode. The decrease can be linked to the changed feeding strategy, the lower concentrations of nitrite, a lower load of ammonia oxidized, a shorter aeration time, the absence of non-optimized ethanol dosage or periodic lack of oxygen as well as the introduction of biofilm. Further, evaluation was done how the operational pH set point influenced the emissions in deammonification mode. Lower concentrations of nitrous oxide were measured in water phase at higher pH (7.5–7.6) than at lower pH (6.6–7.1). This is believed to be mainly because of the lower aeration ratio and increased complete denitrification at the higher pH set point.

scholarly journals Denitrification processes and microbial communities in a sequencing batch reactor treating nanofiltration (NF) concentrate from coking wastewater

2017 ◽  
Vol 76 (12) ◽  
pp. 3289-3298 ◽  
Author(s):  
Enchao Li ◽  
Shuguang Lu
Keyword(s):  
Microbial Communities ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Nitrite Reduction ◽  
Stable Operation ◽  
Rrna Gene ◽  
Coking Wastewater ◽  
Start Up ◽  
Key Microorganisms

Abstract A biological denitrifying process was employed for the treatment of nanofiltration (NF) concentrate with high conductivity, which was generated from coking wastewater in a sequencing batch reactor (SBR). The results showed that the average removal efficiencies of chemical oxygen demand (COD), total nitrogen (TN) and nitrate were 47.6%, 61.1% and 94.6%, respectively. Different microbial communities were identified by sequencing the V1-V3 region of the 16S rRNA gene using the MiSeq platform, showing that the most abundant bacterial phylum in the SBR system was Proteobacteria, with the subclasses β-Proteobacteria and α-Proteobacteria being dominant. The key microorganisms responsible for denitrification belonged to the genera Thauera, Hyphomicrobium, Methyloversatilis, Hydrogenophaga, Ignavibacterium, Rubrivivax and Parvibaculum. Quantitative real-time polymerase chain reaction was used to assess the absolute abundance of microbial genera, using 16S rRNAs and denitrifying genes such as narG, nirS, nirK, nosZ, in both SBR start-up and stable operation. The abundances of narG, nirK and nosZ were lower during stable operation than those during the start-up period. The abundance of nirS at a level of 104–105copies/ng in DNA was much higher than that of nirK, thus being the dominant functional gene in nitrite reduction.

scholarly journals Rapid Start-Up of the Aerobic Granular Reactor under Low Temperature and the Nutriment Removal Performance of Granules with Different Particle Sizes

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3590
Author(s):  
Dongbo Liang ◽  
Jun Li ◽  
Zhaoming Zheng ◽  
Jing Zhang ◽  
Yaodong Wu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Accumulation Rate ◽  
Removal Rate ◽  
Batch Reactor ◽  
Synthetic Wastewater ◽  
Aerobic Granular Sludge ◽  
Nitrite Accumulation ◽  
Stable Operation ◽  
N Removal ◽  
Start Up

The start-up of the aerobic granular sludge (AGS) process under low temperature is challenging. In this study, the sequencing batch reactor (SBR) was fed with synthetic wastewater and the temperature was controlled at 15 ℃. The main components in the synthetic wastewater were sodium acetate and ammonium chloride. The influent chemical oxygen demand (COD) and NH4+-N concentrations were 300 and 60 mg/L, respectively. The AGS was successfully cultivated in 60 days by gradually shortening the settling time. During the stable operation stage (61–100 d), the average effluent COD, NH4+-N, NO2−-N, and NO3−-N concentrations were 47.2, 1.0, 47.2, and 5.1 mg/L, respectively. Meanwhile, the nitrite accumulation rate (NAR) reached 90.6%. Batch test showed that the smaller AGS had higher NH4+-N removal rate while the larger AGS performed higher NAR. The NH4+-N removal rates of R1 (1.0–2.0 mm), R2 (2.0–3.0 mm), and R3 (>3 mm) granules were 0.85, 0.61, and 0.45 g N/(kg VSS·h), respectively. Meanwhile, the NAR of R1, R2, and R3 were 36.2%, 77.2%, and 94.9%, respectively. The obtained results could provide important guidance for the cultivation of AGS in low-temperature wastewater treatment.

Revisiting Glycerol Esterification with Acetic Acid over Amberlyst-35 via Statistically Designed Experiments: Overcoming Transport Limitations

2019 ◽  
Author(s):  
Víctor Gabriel Baldovino Medrano ◽  
Karen V. Caballero ◽  
Hernando Guerrero-Amaya
Keyword(s):  
Acetic Acid ◽  
Active Sites ◽  
Batch Reactor ◽  
Catalyst Particle ◽  
Experimental Designs ◽  
Particle Sizes ◽  
Turnover Rates ◽  
Designed Experiments ◽  
Different Temperatures ◽  
Glycerol Esterification

Turnover rates for glycerol esterification with acetic acid over Amberlyst-35 were measured under different temperatures, reactants and active sites concentrations, and catalyst particle sizes. Data were collected in a batch reactor. Experiments were done following a sequence of factorial experimental designs.

Biomass Characterization in a Nitrification-Denitrification Biological Enhanced Phosphorus Removal (NDBEPR) Plant during Start-Up and Subsequent Periods of Good and Poor Phosphorus Removal

1994 ◽  
Vol 29 (7) ◽  
pp. 91-100 ◽  
Author(s):  
K. C. Lindrea ◽  
S. P. Pigdon ◽  
B. Boyd ◽  
G. A. Lockwood
Keyword(s):  
Phosphorus Removal ◽  
Poor Performance ◽  
Intracellular Distribution ◽  
Full Scale ◽  
Laboratory Scale ◽  
Plant Operation ◽  
The Poor ◽  
Start Up ◽  
Biomass Characterization

During commissioning and process stabilization of a NDBEPR plant at Bendigo intracellular distribution and movement of phosphorus, K+, Mg2+ and Ca2+ was followed to establish the nature of biomass development. The system was also monitored at the end of a period of breakdown of the BEPR process and during its return to phosphorus removal. Phosphorus (P) and Mg2+ distribution in the biomass were closely related during all phases of plant operation, and laboratory trials indicated that the poor performance of the full-scale plant was associated with seasonal reduction in influent Mg2+. Laboratory scale trials produced a similar effect when the influent Mg2+ was limited to concentrations much lower than those experienced in the full scale plant, but only after the Mg2+ and P reserves in the biomass were depleted. The distribution of P, K+, Mg2+ and Ca2+ in the biomass from the full scale plant was similar to that seen in the laboratory trials when cations in the feed were severely limited and recovery of the full scale plant also closely matched that of the laboratory scale system.

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