PMID- 20150692
OWN - NLM
STAT- MEDLINE
DCOM- 20100429
LR  - 20100212
IS  - 0273-1223 (Print)
IS  - 0273-1223 (Linking)
VI  - 61
IP  - 3
DP  - 2010
TI  - Resistance of nitrifiers inhabiting activated sludge to ciliate grazing.
PG  - 573-80
LID - 10.2166/wst.2010.868 [doi]
AB  - We monitored the succession of nitrifiers in a newly opened wastewater treatment 
      plant for five weeks. After the first distinct decrease in total nitrogen, we 
      began monitoring the appearance, size and number of nitrifying bacteria colonies 
      using the fluorescence in situ hybridization (FISH) method. Ammonia oxidizing 
      bacteria (AOB) colonies were visualized under green excitation as red, and 
      nitrite oxidizing bacteria (NOB) colonies were visualized under blue excitation 
      as green. The changes in protozoan community were monitored simultaneously. 
      Ciliates were divided into four functional groups: predatory, bacterivorous 
      free-swimming, bacterivorous crawling, and sessile. The results showed that at 
      the time of the first distinct total nitrogen decrease, the mean length of both 
      AOB and NOB were relatively low, but the colonies, especially those of nitrite 
      oxidizers, were abundant. In time, the distribution of ammonia oxidizer colonies 
      shifted towards larger sizes, but their quantity decreased. In the case of 
      nitrite oxidizers, a similar trend was noticeable but less pronounced. These 
      changes corresponded with an increasing number of crawling bacterivorous ciliates 
      dominated by the "scavenger" genus Aspidisca. The increasing size of nitrifier 
      colonies may have been due to the growing grazing pressure from crawling 
      bacterivorous ciliates. The strong grazing pressure did not negatively affect 
      N-NH(4)(+) removal effectiveness.
FAU - Pajdak-Stos, Agnieszka
AU  - Pajdak-Stos A
AD  - Institute of Environmental Sciences, Jagiellonian University, 30-387 Krakow, 
      Poland. agnieszka.pajdak-stos@uj.edu.pl
FAU - Fialkowska, Edyta
AU  - Fialkowska E
FAU - Fyda, Janusz
AU  - Fyda J
FAU - Babko, Roman
AU  - Babko R
LA  - eng
PT  - Journal Article
PL  - England
TA  - Water Sci Technol
JT  - Water science and technology : a journal of the International Association on 
      Water Pollution Research
JID - 9879497
RN  - 0 (Nitrites)
RN  - 0 (Sewage)
RN  - 7664-41-7 (Ammonia)
SB  - IM
MH  - Ammonia/*metabolism
MH  - Bacteria/*growth & development/metabolism
MH  - Ciliophora/*growth & development/metabolism
MH  - Cold Climate
MH  - Nitrites/metabolism
MH  - Poland
MH  - Population Growth
MH  - Seasons
MH  - Sewage/*microbiology/*parasitology
MH  - Ukraine
MH  - Waste Disposal, Fluid/*methods
EDAT- 2010/02/13 06:00
MHDA- 2010/04/30 06:00
CRDT- 2010/02/13 06:00
PHST- 2010/02/13 06:00 [entrez]
PHST- 2010/02/13 06:00 [pubmed]
PHST- 2010/04/30 06:00 [medline]
AID - 10.2166/wst.2010.868 [doi]
PST - ppublish
SO  - Water Sci Technol. 2010;61(3):573-80. doi: 10.2166/wst.2010.868.