Petros Gkotsis

5 Questions 7 Answers 0 Followers

Questions related from Petros Gkotsis

On the development of a mathematical model that predicts TMP jump in Membrane Bioreactors?

How can SMP and TMP be used as inlet parameters of a mathematical model which predicts TMP jump in Membrane Bioreactors?

22 January 2020 4,495 0 View

Mechanism of bubble size increase in non-Newtonian liquids during upward co-current bubbly flow?

Bubbles ascending in non-Newtonian liquids are larger compared to bubbles in Newtonian liquids. Why?

08 January 2019 5,367 2 View

How are low HRTs connected with the increase of EPS (and consequently membrane fouling rate) in MBRs? What's the chemistry behind this?

It has been observed that low HRTs promote membrane fouling in MBRs, due to the increase in bound or soluble EPS.

28 September 2017 4,781 1 View

How can non-Newtonian (pseudoplastic) nature of liquid phase account for the decrease of void fraction in an upward co-current bubbly flow?

Maybe via the formation of larger bubbles which have higher rising velocity and result in the decrease of the respective residence time? If so, why shear-thinning behavior promotes the formation...

10 May 2017 6,115 9 View

Typical NaHCO3 concentrations in synthetic wastewater (according to the OECD guidelines) to keep pH of activated sludge in a MBR in the range of 7-8?

Synthetic sewage (OECD guideline): - peptone water 160 mg/L- meat extract 110 mg/L- urea 30 mg/L - anhydrous potassium monohdydrogen phosphate 28 mg/L- sodium chloride 7 mg/L- calcium chloride...

23 May 2016 3,001 4 View