Nitrifier Augmentation for High Ammonia Nitrogen Removal by Aerobic Granular Sludge at Low Temperatures

2016 ◽  
Vol 44 (5) ◽  
pp. 525-531 ◽  
Author(s):  
Shuo Wang ◽  
Qianqian Yang ◽  
Wenxin Shi ◽  
Shuili Yu ◽  
Yan Wang ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Low Temperatures ◽  
Granular Sludge ◽  
Ammonia Nitrogen ◽  
Aerobic Granular Sludge ◽  
High Ammonia

Research of Carbon and Nitrogen Ratio and Sludge Stability in Aerobic Granular Sludge Bioreactor

2012 ◽  
Vol 518-523 ◽  
pp. 473-477
Author(s):  
Xia Zhao ◽  
Hui Xia Feng ◽  
Feng Jiang ◽  
Na Li Chen ◽  
Xiao Chun Wang
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Ammonia Nitrogen ◽  
Nitrifying Bacteria ◽  
Aerobic Granular Sludge ◽  
Nitrogen Ratio ◽  
The Stability

In sequencing batch reactor aerobic granular sludge was cultivated, and the influence of influent C/N ratio to aerobic granular sludge was studied. The results showed that the granulation and the settling ability of the sludge were poor in high C/N, however, low C/N was beneficial to the accumulation of microorganism in reactor and MLSS could reach to as high as 8740 mg/L. Lower C/N ratio would lead to increase of particle size and disintegrate of loose structure and overgrowth on filamentous microbe, these were disadvantage of the stability of the system. It was not obvious that influent C/N ratio affected on the organic removal. The COD removal maintained at 87% after the preliminary form particles were formed in reactor. When C/N ratio was 100:15~100:35, the phosphorus removal efficiency was good. If C/N ratio was too high or too low, the formation of sludge granulation would be affected in the process. The influence of C/N ratio to ammonia nitrogen removal efficiency was obvious. While C/N ratio was 100:10, granular sludge had good simultaneous nitrification and denitrification performance, and the average removal of ammonia nitrogen attained to 91%. But low C/N ratio was able to inhibit the activity of nitrifying bacteria and denitrifying bacteria. At that time, ammonia nitrogen removal rate declined sharply in the system.

Strategies to improve aerobic granular sludge stability and nitrogen removal based on feeding mode and substrate

2019 ◽  
Vol 84 ◽  
pp. 144-154 ◽  
Author(s):  
Quan Yuan ◽  
Hui Gong ◽  
Hao Xi ◽  
Heng Xu ◽  
Zhengyu Jin ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Feeding Mode

scholarly journals Cultivation of aerobic granular sludge in a microbial fuel cell

2020 ◽  
Vol 167 ◽  
pp. 01007
Author(s):  
You-xian Gao ◽  
Ping Yang
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Granular Sludge ◽  
Ammonia Nitrogen ◽  
Aerobic Granular Sludge ◽  
Extracellular Polymers ◽  
Voltage Output ◽  
Increasing Trend ◽  
Pollutants Removal ◽  
Self Aggregation

Aerobic granular sludge(AGS) is a special biofilm formed by the self-aggregation of sludge material. In this study, AGS was cultivated in the biocathode of a continuous flow microbial fuel cell (MFC). During the formation of AGS, changes in sludge concentration, extracellular polymers (EPS), pollutants removal and power generation were examined. The results showed that, MLVSS kept above 5 g/L, the PS, PN and PN/PS of TB-EPS showed a gradually increasing trend, the removal efficiency of COD and ammonia nitrogen was 94.46% and 93.03%, respectively. A maximum voltage output of 350 mV was achieved.

Effect of chromium (VI) on the multiple nitrogen removal pathways and microbial community of aerobic granular sludge

2017 ◽  
Vol 39 (13) ◽  
pp. 1682-1696 ◽  
Author(s):  
Xiao-ying Zheng ◽  
Dan Lu ◽  
Ming-yang Wang ◽  
Wei Chen ◽  
Gan Zhou ◽  
...  
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Chromium Vi

scholarly journals A Bioreactor Designed for Restricting Oversize of Aerobic Granular Sludge

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 374
Author(s):  
Hongbo Feng ◽  
Honggang Yang ◽  
Jianlong Sheng ◽  
Zengrui Pan ◽  
Jun Li
Keyword(s):  
Particle Size ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Granular Sludge ◽  
Pilot Scale ◽  
Ammonia Nitrogen ◽  
Pollutant Removal ◽  
Volume Index ◽  
Aerobic Granular Sludge ◽  
Air Bubbles

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) with a spiny aeration device was put forward. A conventional SBR (R1) and an SBR (R2) with the spiny aeration device treating tannery wastewater were compared in the laboratory. The result indicates that the size of the granular sludge from R2 was smaller than that from R1 with sludge granulation. The spines and air bubbles could effectively restrict the particle size of AGS by collision and abrasion. Nevertheless, there was no significant change in mixed liquor suspended solids (MLSS) and the sludge volume index (SVI) in either bioreactors. The removal (%) of chemical oxygen demand (COD) and ammonia nitrogen (NH4+-N) in these two bioreactors did not differ from each other greatly. The analysis of biological composition displays that the proportion of Proteobacteria decreased slightly in R2. The X-ray fluorescence (XRF) analysis revealed less accumulation of Fe and Ca in smaller granules. Furthermore, a pilot-scale SBR with a spiny aeration device was successfully utilized to restrict the diameter of granules at about 300 μm.

Quick Cultivation of Micro-Aerobic Granular Sludge for Simultaneous Nitrogen Removal

2011 ◽  
Vol 415-417 ◽  
pp. 1239-1242
Author(s):  
Xiao Liu ◽  
Li Na Guo
Keyword(s):  
Nitrogen Removal ◽  
Settling Velocity ◽  
Average Particle Size ◽  
Sewage Treatment ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Average Particle ◽  
Excess Sludge ◽  
Effluent Recirculation ◽  
Oxygenation Rate

In order to accelerate the cultivation of micro-aerobic granular sludge for domestic sewage treatment, an expanded granular sludge bed (EGSB) reactor seeded with excess sludge was employed. It was found that micro-aerobic granules can form and grew compact within one month, and remained stable during the later operation, the mature cultivation had average particle size of 0.81mm, and 64% of the granules had settling velocity above 35m•h-1. Moreover, excellent COD and nitrogen removal were obtained. For hydraulic retention time (HRT) of 5h, as the recirculation ratio and oxygenation rate were set at 6.5 and 0.25g•L-1d-1respectively, COD removal ranged in 80%-91%, leaving effluent COD below 50mg•L-1. The removal efficiency of ammonium and total nitrogen (TN) were 72%-89% and 76%-87%, respectively with effluent concentration down to 3-12mg•L-1and 5-14mg•L-1. Results showed that the efficiency of simultaneous nitrogen removal was much influenced by effluent recirculation and oxygenation rate in micro-aerobic EGSB reactor.

Treatment of high loaded swine slurry in an aerobic granular reactor

2011 ◽  
Vol 63 (9) ◽  
pp. 1808-1814 ◽  
Author(s):  
M. Figueroa ◽  
A. Val del Río ◽  
J. L. Campos ◽  
A. Mosquera-Corral ◽  
R. Méndez
Keyword(s):  
Organic Matter ◽  
Nitrogen Removal ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Average Diameter ◽  
Nitrogen Loading ◽  
Aerobic Granular Sludge ◽  
Swine Slurry ◽  
Start Up ◽  
Removal Efficiencies

Aerobic granular sludge grown in a sequential batch reactor was proposed as an alternative to anaerobic processes for organic matter and nitrogen removal from swine slurry. Aerobic granulation was achieved with this wastewater after few days from start-up. On day 140 of operation, the granular properties were: 5 mm of average diameter, SVI of 32 mL (g VSS)−1 and density around 55 g VSS (Lgranule)−1. Organic matter removal efficiencies up to 87% and nitrogen removal efficiencies up to 70% were achieved during the treatment of organic and nitrogen loading rates (OLR and NLR) of 4.4 kg COD m−3 d−1 and of 0.83 kg N m−3 d−1, respectively. However, nitrogen removal processes were negatively affected when applied OLR was 7.0 kg COD m−3 d−1 and NLR was 1.26 kg N m−3 d−1. The operational cycle of the reactor was modified by reducing the volumetric exchange ratio from 50 to 6% in order to be able to treat the raw slurry without dilution.

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