Achieving high-rate partial nitritation with aerobic granular sludge at low temperatures

2021 ◽  
Author(s):  
Wenru Liu ◽  
Yaoliang Shen ◽  
Dianhai Yang
Keyword(s):  
Low Temperatures ◽  
Granular Sludge ◽  
High Rate ◽  
Aerobic Granular Sludge ◽  
Partial Nitritation

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

Rapid start-up of a nitrifying reactor using aerobic granular sludge as seed sludge

2012 ◽  
Vol 65 (3) ◽  
pp. 581-588 ◽  
Author(s):  
Naohiro Kishida ◽  
Goro Saeki ◽  
Satoshi Tsuneda ◽  
Ryuichi Sudo
Keyword(s):  
Removal Rate ◽  
Granular Sludge ◽  
Ammonia Removal ◽  
High Rate ◽  
Aerobic Granular Sludge ◽  
Nitrite Accumulation ◽  
Ammonia Oxidizing Bacteria ◽  
Continuous Stirred Tank Reactor ◽  
Start Up ◽  
Seed Sludge

In this study, the effectiveness of aerobic granular sludge as seed sludge for rapid start-up of nitrifying processes was investigated using a laboratory-scale continuous stirred-tank reactor (CSTR) fed with completely inorganic wastewater which contained a high concentration of ammonia. Even when a large amount of granular biomass was inoculated in the reactor, and the characteristics of influent wastewater were abruptly changed, excess biomass washout was not observed, and biomass concentration was kept high at the start-up period due to high settling ability of the aerobic granular sludge. As a result, an ammonia removal rate immediately increased and reached more than 1.0 kg N/m3/d within 20 days and up to 1.8 kg N/m3/d on day 39. Subsequently, high rate nitritation was stably attained during 100 days. However, nitrite accumulation had been observed for 140 days before attaining complete nitrification to nitrate. Fluorescence in situ hybridization analysis revealed the increase in amount of ammonia-oxidizing bacteria which existed in the outer edge of the granular sludge during the start-up period. This microbial ecological change would make it possible to attain high rate ammonia removal.

scholarly journals Significance of Reactor Type for High-Rate Nitrification Using Aerobic Granular Sludge

2011 ◽  
Vol 9 (3) ◽  
pp. 289-296 ◽  
Author(s):  
Yoshiaki HASEBE ◽  
Masahiro EGUCHI ◽  
Hiroaki MEGURO ◽  
Satoshi TSUNEDA
Keyword(s):  
Granular Sludge ◽  
High Rate ◽  
Aerobic Granular Sludge ◽  
Reactor Type

High-Rate Nitrification Using Aerobic Granular Sludge

2006 ◽  
Vol 53 (3) ◽  
pp. 147-154 ◽  
Author(s):  
S. Tsuneda ◽  
M. Ogiwara ◽  
Y. Ejiri ◽  
A. Hirata
Keyword(s):  
Activated Sludge ◽  
Removal Rate ◽  
Granular Sludge ◽  
Ammonia Removal ◽  
High Rate ◽  
Pure Oxygen ◽  
Synthetic Wastewater ◽  
Aerobic Granular Sludge ◽  
Fluidised Bed ◽  
High Concentration

The performance of nitrifying granules, which had been produced in an aerobic upflow fluidised bed (AUFB) reactor, was investigated in various types of ammonia-containing wastewaters. When pure oxygen was supplied to the AUFB reactor with a synthetic wastewater containing a high concentration of ammonia (500 g-N/m3), the ammonia removal rate reached 16.7 kg-N/m3/day with a sustained ammonia removal efficiency of more than 80%. The nitrifying granules possessing a high settling ability could be retained with a high density (approximately 10,000 g-MLSS/m3) in a continuous stirring tank reactor (CSTR) even under a short hydraulic retention time (44 min), which enabled a high-rate and stable nitrification for an inorganic wastewater containing low concentrations of ammonia (50 g-N/m3). Moreover, the nitrifying granules exhibited sufficient performance in the nitrification of real industrial wastewater containing high concentrations of ammonia (1,000–1,400 g-N/m3) and salinity (1.2–2.2%), which was discharged from metal-refinery processes. When the nitrifying granules were used in cooperation with activated sludge to treat domestic wastewater containing organic pollutants as well as ammonia, they fully contributed to nitrification even though a part of activated sludge adhered onto the granule surfaces to form biofilms. These results show the wide applicability of nitrifying granules to various cases in the nitrification step of wastewater treatment plants.

Segregation of Biomass in Cyclic Anaerobic/Aerobic Granular Sludge Allows the Enrichment of Anaerobic Ammonium Oxidizing Bacteria at Low Temperatures

2011 ◽  
Vol 45 (17) ◽  
pp. 7330-7337 ◽  
Author(s):  
Mari K. H. Winkler ◽  
Robbert Kleerebezem ◽  
J. Gijs Kuenen ◽  
Jingjing Yang ◽  
Mark C. M. van Loosdrecht
Keyword(s):  
Low Temperatures ◽  
Granular Sludge ◽  
Aerobic Granular Sludge

Achievement of high rate nitritation with aerobic granular sludge reactors enhanced by sludge recirculation events

2014 ◽  
Vol 9 (3) ◽  
pp. 528-533 ◽  
Author(s):  
Zulkifly Jemaat ◽  
Josep Anton Tora ◽  
Albert Bartroli ◽  
Julián Carrera ◽  
Julio Perez
Keyword(s):  
Granular Sludge ◽  
High Rate ◽  
Aerobic Granular Sludge

scholarly journals High-Rate Anaerobic Treatment of Wastewater at Low Temperatures

1999 ◽  
Vol 65 (4) ◽  
pp. 1696-1702 ◽  
Author(s):  
Gatze Lettinga ◽  
Salih Rebac ◽  
Sofia Parshina ◽  
Alla Nozhevnikova ◽  
Jules B. van Lier ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Oxygen Demand ◽  
Granular Sludge ◽  
Anaerobic Treatment ◽  
High Rate ◽  
Degradation Rates ◽  
In Series ◽  
Propionate Oxidation ◽  
Stage System ◽  
Specific Degradation

ABSTRACT Anaerobic treatment of a volatile fatty acid (VFA) mixture was investigated under psychrophilic (3 to 8°C) conditions in two laboratory-scale expanded granular sludge bed reactor stages in series. The reactor system was seeded with mesophilic methanogenic granular sludge and fed with a mixture of VFAs. Good removal of fatty acids was achieved in the two-stage system. Relative high levels of propionate were present in the effluent of the first stage, but propionate was efficiently removed in the second stage, where a low hydrogen partial pressure and a low acetate concentration were advantageous for propionate oxidation. The specific VFA-degrading activities of the sludge in each of the modules doubled during system operation for 150 days, indicating a good enrichment of methanogens and proton-reducing acetogenic bacteria at such low temperatures. The specific degradation rates of butyrate, propionate, and the VFA mixture amounted to 0.139, 0.110, and 0.214 g of chemical oxygen demand g of volatile suspended solids−1 day−1, respectively. The biomass which was obtained after 1.5 years still had a temperature optimum of between 30 and 40°C.

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