I have 10 or more g TSS or 7 VSS in my sample of waste activated sludge. Now I am using digestion for Total phosphorus, I do not want to dry it in oven, rather I want to use it in its original form so I want to know how can we use it on dry mass basis.
In protocol they used 3g of dry mass basis.
If you want numbers with any meaning you have to dry it first. Since you do not know how much water you have in the suspension, you can not correct to dry weight.
The P content in activated sludge varies, so you cannot calculate the p content from your measurements.
Hi, as already mentioned, if you want accurate numbers you need to dry it. A very rough estimation you could probably use in your case, might be to just centrifuge it down and weight the pellet or just filter dry it without the oven. You will still have liquid left but that's negligible if you only want a rough estimation for, e.g. inoculating liquid fermentations,...
Thank you all of you for your valuable responses.
How about if we dry our sludge and then on the basis of mg/g of sludge (on dry mass basis) ? I think we can measure the TP on dry mass basis. If such is the case then can we use our sludge directly on solid mass basis for TP measurments?
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