Source:http://linkedlifedata.com/resource/pubmed/id/20935368
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
7
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| pubmed:dateCreated |
2010-10-11
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| pubmed:abstractText |
This study evaluated the partial nitrification performances of two biofilm filters over a synthetic non-ammonium-rich wastewater at a 20°C room temperature under both limited DO (?2.0 mg/L) and unlimited DO (?4.0 mg/L) conditions. The two filters were each of 80 cm long and used different biofilm carriers: activated carbon and ceramic granule. Results showed that partial nitrification was accomplished for both filters under the limited DO condition. However, the effluent NO(2)-N was higher in the ceramic granule filter than in the activated carbon filter, and was less susceptible to the influent COD/N changes. Further investigation into the water phase COD and NH(4)-N depth profiles and bacteria population within the two filters showed that by putting upper filter layer (upstream) to confront relatively higher influent COD/N ratios, the filtration process naturally put lower filter layers (downstream) relatively more favorable for nitrifying bacteria (ammonia oxidizing bacteria in this study) to prosper, making the filter depth left for nitrification a crucial factor for the effectiveness of nitrification with a filter. The potentially different porous flow velocities of the two filters might be the reason to cause their different partial nitrification performances, with a lower porous flow velocity (the ceramic granule filter) favoring partial nitrification more. In summation, DO, filter depth, and filtration speed should be played together to successfully operate a biofilm filter for partial nitrification.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:chemical | |
| pubmed:status |
MEDLINE
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| pubmed:issn |
0273-1223
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
62
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
1518-25
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| pubmed:meshHeading |
pubmed-meshheading:20935368-Bacterial Load,
pubmed-meshheading:20935368-Biofilms,
pubmed-meshheading:20935368-Ceramics,
pubmed-meshheading:20935368-Charcoal,
pubmed-meshheading:20935368-Filtration,
pubmed-meshheading:20935368-Nitrification,
pubmed-meshheading:20935368-Temperature,
pubmed-meshheading:20935368-Waste Disposal, Fluid
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| pubmed:year |
2010
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| pubmed:articleTitle |
Partial nitrification of non-ammonium-rich wastewater within biofilm filters under ambient temperature.
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| pubmed:affiliation |
School of Civil Engineering, Wuhan University, 430072 Wuhan, China. hywangwhu@yahoo.com
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| pubmed:publicationType |
Journal Article
|