Reuse of Sewage Sludge as Organic Agricultural Products: An Efficient Technology-Based Initiative

Table 2

Comparative analysis of in-house sludge and STP sewage sludge compost.

Parameter	Specification	Concentration in in-house compost	Concentration in STP compost
pH	6.5–7.5	7.56 ± 0.3	6.78 ± 0.16
Moisture content (%)	15–25%	30.55 ± 0.49	52.11 ± 2.3
Total organic carbon (%)	Minimum 12%	15.24 ± 1.9	15.02 ± 1.02
Total nitrogen (N)	Minimum 0.8%	0.96 ± 0.07	0.59 ± 0.03
C : N ratio	Less than 20	15.91 ± 1.01	25.45 ± 1.83
Total phosphate as P2O5 (P)	Minimum 0.4%	0.77 ± 0.03	1.01 ± 0.08
Total potassium as K2O (K)	Minimum 0.4%	0.37 ± 0.07	0.16 ± 0.06
Total NPK nutrient	Not less than 3%	2.1 ± 0.08	1.77 ± 0.06