+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Density, porosity, and pore structure of biofilms

, : Density, porosity, and pore structure of biofilms. Water Research 28(11): 2267-2277

The spatial distributions of biofilm properties have been investigated. Heterotrophic biofilms were cultured by using rotating drum biofilm reactors which were fed to a synthetic wastewater. The biofilm was first cut into 10-20 mu-m thick slices by use of a microtome, and then apportioned into samples representing 3 or 4 layers. By measuring total suspended solids, phospholipid concentrations and AR18 dye adsorption, and using these data with the theoretical model developed in this study, the densities, porosities, specific surface area, and mean pore radius of biofilms were determined. It was found that the densities (with units of mg-TS/cm-3 total biofilm) in the bottom layers were 5-10 times higher than those in the top layers; the ratio of living cells to total biomass decreased from 72 to 91% in the top layers to 31-39% in the bottom layers; the porosities of biofilms changed from 84 to 93% in the top layers to 58-67% in the bottom layers. In contrast, the mean pore radius of biofilms decreased from approximately 1.7-2.7 mu-m in the top layers to 0.3-0.4 mu-m in the bottom layers. The results of this study are helpful in obtaining a much clearer physical description of biofilms.

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 002590506

DOI: 10.1016/0043-1354(94)90042-6

PDF Full Text: Density, porosity, and pore structure of biofilms

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Iavicoli M.; Ventriglia L.; Galfo C.; U.; Maldonato A.; Andreani D., 1981: Insulin antibodies and immune complexes in newly diagnosed type 1 diabetics treated with mono component or conventional insulins. Diabetologia 21(3): 284

Kamisawa, T.; Kurata, M.; Honda, G.; Tsuruta, K.; Okamoto, A., 2009: Biliopancreatic reflux-pathophysiology and clinical implications. The common bile duct and the main pancreatic duct open into the duodenum, where they frequently form a common channel. The sphincter of Oddi is located at the distal end of the pancreatic and bile ducts; it regulates the outflow of bile and pancre...

Kutyshenko, V.P.; Prokhorov, D.A., 2003: Guanidine Hydrochloride Unfolding of a Carbonic Anhydrase Molten Globule. Guanidine hydrochloride-induced unfolding of a carbonic anhydrase molten globule was studied by high-resolution nuclear magnetic resonance spectroscopy. The study resulted in estimation of the number of water and denaturant molecules bound to the...

Merry, Julius, 1968: Assessing heroin addiction. This is a letter to the editor telling how to ascertain whether a person is a heroin addict and what pharmacological treatment to give for withdrawal symptoms.

Lipp, M.J.; Sorini, A.P.; Bradley, J.; Maddox, B.; Moore, K.T.; Cynn, H.; Devereaux, T.P.; Xiao, Y.; Chow, P.; Evans, W.J., 2013: X-ray emission spectroscopy of cerium across the γ-α volume collapse transition. High-pressure x-ray emission measurements are used to provide crucial evidence in the longstanding debate over the nature of the isostructural (α, γ) volume collapse in elemental cerium. Extended local atomic model calculations show that the sat...

Chou, K.C.; Walker, D.M., 1964: The effect on the rumen composition of feeding sheep diets supplying different starches. 1. The variation in rumen composition of sheep fed lucerne or wheat as the sole diet. Rumen samples were drawn from 7 sheep that had been gradually introduced to diets wholly of dried lucerne or wheat. One feed daily was given and the amount was close to the maximum voluntary intake. At least 14 days on each diet elapsed before sam...

Gordon, C.M., 2014: Low bone density during childhood: what does it predict?. Journal of Pediatrics 164(6): 1252-1254

García-Sancho, E.; Salguero, Jé.M.; Fernández-Berrocal, P., 2016: Ability emotional intelligence and its relation to aggression across time and age groups. NlmCategory="UNASSIGNED">Emotional Intelligence (EI) has been associated with several indicators of psychosocial adjustment, including aggressive behavior, but the relevant research has been mostly cross-sectional, focused on adults,...

Kang, Y.Sun.; Kim, J.Hwan.; Ahn, E.Hee.; Yoo, E-Gyong.; Kim, M.Kyu., 2015: Iron and vitamin D status in breastfed infants and their mothers. We assessed the relationships between iron and vitamin D statuses in breastfed infants and their mothers and evaluated the determinants of iron and vitamin D deficiencies in breastfed infants. Seventy breastfed infants aged 4-24 months and their m...

Selivonenko, V.G.; Ovcharenko, V.T.; Syvolap, V.D., 1988: Changes in the hormone system in patients with acute and chronic pneumonia. Vrachebnoe Delo: 56-56