Waleed M. Sh. Alabdraba

5 Questions 34 Answers 0 Followers

Questions related from Waleed M. Sh. Alabdraba

How does temperature effect yield and decay coefficients in activated sludge process?

I have date from lab scale extended aeration activated sludge, i try to find a relationship between Y and Kd with the temperature but there are no clear trend.

10 July 2015 5,382 12 View

Does anyone know about the ratio between BOD and COD in wastewater?

in a wastewater analysis i find the BOD/COD ratio in raw wastewater is 0.76 but in treated wastewater the BOD/COD ratio was 0.43 , why it different from that of raw wastewater? and which is better...

25 June 2015 1,508 25 View

Why do I see formation of a white sediment when I add AgSO4/H2SO4 for COD test?

When I try to do COD test when i add the AgSO4/H2SO4 solution a white colour sediment paper immediately, who can tell me why this happened? is it a problem with the H2SO4 or AgSO4?

11 June 2015 5,835 23 View

Why do some elements concentration increase after RO unit?

During the evaluation of reverse osmosis unit treating groundwater unit we found that the concentrations of Al, Cu, Mn, Zn, and Fe in treated water is higher than these in the raw water, if we...

03 June 2014 236 2 View

Which is a better way to measure the impact of sewage on gypsum soil, immersion or infiltration?

See above.

18 May 2014 7,695 3 View