The aim of this study was to determine the effects on the methane potential and the overall sludge quality from two different sludge pre-treatment technologies (ozonation high/low dosage and thermal treatment 55/70 °C). In general both treatments gave an increased methane potential. The thermal treatment resulted in higher chemical oxygen demand (COD)-solubilisation, while the highest volatile fatty acids (VFA) increase was obtained with ozonation. The sludges had inhibiting effects in a barley seed germination assay and a yeast oestrogen screen both before and after pre-treatment, but the inhibition was reduced by ozone treatment and digestion. No statistical significant reduction in concentrations of the included pharmaceuticals could be seen.
|Number of pages||8|
|Publication status||Published - 2012|
|Event||3rd European Conference on Sludge Management - Leon, Spain|
Duration: 6 Sep 2012 → 7 Sep 2012
Conference number: 3
|Conference||3rd European Conference on Sludge Management|
|Period||06/09/2012 → 07/09/2012|