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