Linked Life Data

818958

Source:http://linkedlifedata.com/resource/pubmed/id/818958

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1976-8-2
pubmed:abstractText
Estimates of NH4+-and NO2-oxidizers in samples from four activated sludge plants treating mainly domestic sewage were obtained using a most-probable-number (MPN) technique. Ranges of concentrations per milliliter of each, respectively, were 1,010 to 3,880 and 79 to 145 in settled sewages, 32 to 7,420 and 2 to 1,010 in secondary effluents, and less than 0.1 to 622 and 0.1 to 70 in chlorinated secondary effluents. The results of this field study indicated that nitrifiers were more resistant to chlorination than fecal streptococci, which were also enumerated. In laboratory studies the survivals of these bacterial groups in secondary effluents were determined after exposure to chlorine residuals of up to 2 mg/liter for 0 to 60 min. The nitrifiers proved considerably more resistant than fecal streptococci, with NO2-oxidizers showing greater resistance than NH4+-oxidizers. Below the outfall of one of the plants that discharges heavily chlorinated unnitrified effluent, NH4+-oxidizers amounted to approximately 200 X 10(5) per g of slime scraped from stream-bed rocks. Upstream of the outfall this was approximatley 3 X 10(5)/G.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0099-2240
pubmed:author
pubmed:issnType
Print
pubmed:volume
31
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
731-7
pubmed:dateRevised
2010-9-3
pubmed:meshHeading
pubmed:year
1976
pubmed:articleTitle
Concentrations of nitrifying bacteria in sewages, effluents, and a receiving stream and resistance of these organisms to chlorination.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.