Articles - Sludge Treatment
Lenntech - Wastewater Treatment
Sludge parameters are
the basis for the supervision and the construction of sludge treatment
plants. They provide the engineer with important notes over the existing
(in-) organic portions, the settling behavior, the dewatering and the
heat value of the sludge.
Total suspended solids TSS
Mixed liquid from the reactor, the treated
water, and the feed is filtered and heated in a 105°C oven.
In this process, because of the low
temperature, only the water is evaporated and nothing is burned.
This is then weighed to conclude how much solids were in the feed,
the treated water and the reactor.
Volatile suspended solid VSS
The filtrate is taken from the 105 degree C oven and then placed in
a 600 degree C oven where the organic materials burn and the left
over inorganic materials are weighed.
Sludge volume index SVI
Mixed liquid is taken from the reactor and taken to a slow mix to
settle. After half an hour the sludge
volume is measured. The SVI units are (ml/g).