Activated Sludge Articles & Analysis
4 articles found
A sequencing batch reactor was used to investigate the effect of carbon sources on the metabolism of activated sludge. Acetate and phenol, with the chemical oxygen demand (COD) of 330–350 mg L−1, was used as the carbon source in Periods I and II, respectively. ...
(R)‐NAP was not detected in STP influents, whereas it was present in effluents, and the enantiomeric faction (EF = S/(S + R)) of NAP ranged from 0.88 to 0.91 Under laboratory conditions with activated sludge from STPs, rapid degradation of (S)‐NAP to DM‐NAP and chiral inversion of (S)‐ to (R)‐NAP were observed. ...
TIE Phase II toxicity assessment of isolated fractions coupled with colorimetric surfactant analyses confirmed the possible role of surfactants in effluent toxicity.The toxic effects of standard reference surfactants on T.gratilla fertilization indicated a concordance with the effects of the more nonpolar effluent fractions.Treatability studies showed that biodegradation by ...
In this study, a novel competitive FISH approach was developed and used to determine, based on a thermodynamic model of probe competition, the numbers of 16S rRNA copies per cell required to detect bacteria by FISH and CARD-FISH with oligonucleotide probes in mixed pure cultures and in activated sludge. The detection limits of conventional FISH with Cy3-labeled ...