Use of Novel Techniques to Quantify Phenotypes in Biological Treatment Process (häftad, eng)
Use of Novel Techniques to Quantify Phenotypes in Biological Treatment Process (häftad, eng)
Gästpris:
Ditt medlemspris:
1 406 kr
1 625 kr
Kampanjpris! (-7%)
Kampanjpris! (-20%)
- Inköpspriser för medlemmar (Logga in)
- Frakt från 0 kr
- 14 dagars öppet köp
Frågor? Starta chatt
This research attempts to evaluate nitrification treatment performance in combined carbon/nitrogen municipal wastewater reactors using traditional physical/chemical methods and modern molecular techniques. Bench scale activated sludge reactors were operated at different SRTs under varying DO levels and temperatures over a 21-month period.
Real-time PCR assays were used to determine cell concentrations of total bacterial 16S rDNA, a gross measure of biomass content, the amoA gene, a measure of ammonia-oxidizing bacteria (AOB), and the Nitrospira 16S rDNA gene, a measure of nitrite-oxidizing bacteria (NOB).
As expected, gravimetric biomass and total bacterial 16S rDNA levels increased with increasing SRT. Ammonia oxidation rates and N. oligotropha-type AOB concentrations did not follow similar trends with respect to changes in SRT, temperature, and DO nor were they highly correlated.
The concentration of available nitrite and SRT were positively correlated with Nitrospira cell densities, while DO concentration and temperature were negatively correlated with NOB levels. The percentage of the total population comprised of AOB and NOB obtained with the real-time PCR assays were compared to predicted values estimated from design equations using typical kinetic parameters.
While the percentages of NOB measured using the real-time PCR assay corresponded very well with the predicted values, the measured percentages of AOB were much lower than those estimated from the design equations, suggesting that N. oligotropha-type AOB were not the dominant ammonia-oxidizing species in these reactors.
This publication can be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
Real-time PCR assays were used to determine cell concentrations of total bacterial 16S rDNA, a gross measure of biomass content, the amoA gene, a measure of ammonia-oxidizing bacteria (AOB), and the Nitrospira 16S rDNA gene, a measure of nitrite-oxidizing bacteria (NOB).
As expected, gravimetric biomass and total bacterial 16S rDNA levels increased with increasing SRT. Ammonia oxidation rates and N. oligotropha-type AOB concentrations did not follow similar trends with respect to changes in SRT, temperature, and DO nor were they highly correlated.
The concentration of available nitrite and SRT were positively correlated with Nitrospira cell densities, while DO concentration and temperature were negatively correlated with NOB levels. The percentage of the total population comprised of AOB and NOB obtained with the real-time PCR assays were compared to predicted values estimated from design equations using typical kinetic parameters.
While the percentages of NOB measured using the real-time PCR assay corresponded very well with the predicted values, the measured percentages of AOB were much lower than those estimated from the design equations, suggesting that N. oligotropha-type AOB were not the dominant ammonia-oxidizing species in these reactors.
This publication can be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below
| Format | Häftad |
| Omfång | 207 sidor |
| Språk | Engelska |
| Förlag | IWA Publishing |
| Utgivningsdatum | 2004-01-01 |
| ISBN | 9781843396970 |
Artikelnummer
4016653
EAN
9781843396970
Leverans:
Denna produkt skickas från oss inom 6 - 7 vardagar. I kassan väljer du om du vill få leverans med Budbee, Airmee, Best Transport, Early Bird, Postnord eller DB Schenker. Vissa speditörer har vikt- eller storleksbegränsningar och kan av den anledningen saknas som alternativ i kassan om du handlar många eller väldigt stora produkter.Fri retur:
För medlemmar gäller fri retur och 14 dagars full returrätt från den dagen du tar emot din leverans. För övriga kostar retur från 49 kr.Undantag för retur- och ångerrätt:
Dessa är exempel på varor som inte omfattas av retur- eller ångerrätt. Observera att det kan finnas andra undantag som inte listas här.- Använda, skadade och/eller inkompletta produkter
- Dagligvaror (livsmedel, läkemedel, nikotinprodukter)
- Hygienartiklar & kroppsnära produkter (rakapparater, in ear-hörlurar, aktivitetsklockor)
- Intimprodukter (menskoppar, kondomer och glidmedel)
- Kosmetikprodukter (inkl. hår- och hudvårdsprodukter, parfymer, etc.)
- Underkläder (inkl. badkläder, underställ och strumpor)
- Ljud- & bildupptagningar, spel/program (om förseglingen brutits eller licensnyckeln erhållits.)
- Teknikprodukter om försegling brutits eller programvara har installerats (mobiltelefoner, surfplattor, laptops, etc.)
- Gratisprodukter
Om du är osäker på om en produkt omfattas av ångerrätt kan du alltid kontakta vår kundtjänst på info@buyersclub.se, så hjälper vi dig gärna!
Leveranser:
