The Tendency of the N Removal by Anaerobic Ammonia Oxidation Bacteria with or without Packed Media in SBR

A set of bench scale ASBR reactors with 0.5 L effective volume were carried out to culture anaerobic ammonia oxidizing bacteria, while the anaerobic granular sludge was inoculated into these reactors as well as the operating temperature is 30±1°C, HRT is 72h and pH is approximate 7.8 in this experiment. After 60 days running, these reactors appeared anaerobic ammonia oxidation phenomenon. When the influent NH4+-N and NO2--N concentrations were approximately 50 mg/L and 70 mg/L, the NH4+-N, NO2--N and TN removal were 80%, 90% and 70%, respectively, the ratio of the NH4+-N and NO2--N removal and NO3--N production is approximately 1:1.5:0.25, close to the theoretical valve of 1:1.32:0.26 and that mainly accord with the chemical equilibrium of anaerobic ammonia oxidation mode. Furthermore, when the phenomenon of anaerobic ammonia oxidation appeared, effluent pH value was slightly higher than influent and the sludge become red.

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Study on Active Recovery of Anaerobic Ammonia Oxidation and Start-Up of ASBR Reactor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.2291 ◽

2013 ◽

Vol 726-731 ◽

pp. 2291-2294

Author(s):

Li Zhang ◽

Xiao Min Hu ◽

Bin Hui Jiang ◽

Yong Gang Huang

Keyword(s):

Ammonia Oxidation ◽

Enrichment Culture ◽

Removal Rate ◽

Anammox Bacteria ◽

Active Recovery ◽

Whole Process ◽

Volume Load ◽

N Removal ◽

Load Train ◽

Anaerobic Ammonia Oxidation

In order to prevent the loss of microbes, added anaerobic ammonia oxidation to (ASBR) reactor plus membrane as the growth of anaerobic ammonia oxidation bacteria carrier. After 30d cultivate, the activity of anammox bacteria restore to the original level, and improve TN volume load train anammox bacteria. The whole process of NH4+-N and NO2--N removal rate has remained at more than 90%.After the activity recovery of anammox NH4+-N, NO2--N the ratio of consumption to the NO3--N generation finally tends to a certain value (1. 00b 1. 30 b 0. 25).In the process of cultivate, the sludge was gradually changed from black to red brown color .Results show that the ASBR is well suited for anammox enrichment culture of bacteria.

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Nitrate reduction, nitrous oxide formation, and anaerobic ammonia oxidation to nitrite in the gut of soil-feeding termites (Cubitermes and Ophiotermes spp.)

Environmental Microbiology ◽

10.1111/j.1462-2920.2011.02648.x ◽

2011 ◽

Vol 14 (4) ◽

pp. 860-871 ◽

Cited By ~ 33

Author(s):

David Kamanda Ngugi ◽

Andreas Brune

Keyword(s):

Nitrous Oxide ◽

Nitrate Reduction ◽

Ammonia Oxidation ◽

Oxide Formation ◽

Anaerobic Ammonia Oxidation

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Influence of operating conditions on population dynamics in nitrifying biofilms

Water Science & Technology ◽

10.2166/wst.1999.0315 ◽

1999 ◽

Vol 39 (7) ◽

pp. 5-11 ◽

Cited By ~ 5

Author(s):

Valentina Lazarova ◽

Danièle Bellahcen ◽

Jacques Manem ◽

David A. Stahl ◽

Bruce E. Rittmann

Keyword(s):

Population Dynamics ◽

Ammonia Oxidation ◽

Biofilm Reactor ◽

Operating Conditions ◽

Stable Operation ◽

N Removal ◽

Wide Range ◽

Total Nitrogen Removal ◽

Nitrite Oxidizers

TURBO N® is a circulating-bed biofilm reactor that provides stable operation and high N removal for a wide range of N and BOD loadings. This paper describes the influence of operating conditions on biofilm composition and population dynamics when the TURBO N® is operated to achieve tertiary nitrification, simultaneous carbon and ammonia oxidation and total nitrogen removal when coupled with a pre-denitrification fixed floating bed reactor. In situ specific nitrification rates and respiration tests showed that ammonium and nitrite oxidizers became less active in the biofilm once oxidation of influent BOD became important. Analyses of community structure with oligonucleotide probes targeted to the 16S rRNA showed the same general trends for nitrifiers, but also suggested shifts in the makeup of the ammonium and nitrite oxidizers that could not be detected with respirometry or specific nitrification rates.

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