3.2 Sample characterization
The routinely prepared in-house compost, as well as the compost prepared
from STP sludge, were characterized simultaneously to compare their
characteristics. The STP sludge had certain undesirable components like
grass which were could create problems in the final product. The STP
sludge was ground well before analysis in order to prevent lump
formation due to its sticky nature. The comparative analysis of the
in-house compost and STP sludge compost along with the prescribed
specifications as per FCO, 1985 is given below in Table 1.
Table 1: Comparative analysis of in-house sludge and STP sewage sludge
compost