Off-Site Lime Stabilisation as an Option to Treat Pit Latrine Faecal Sludge for Emergency and Existing On-Site Sanitation Systems

Table 1

Average lime dosage used in small-scale field trials.

Reactor (desired pH)	Initial pH	Sludge wt (kg)	Initial TS (% w/w) (wet basis)	Lime dose (kg)	Lime dosage % w/w (dry basis)
Control	6.7 ± 0.2	29.7 ± 6.4	9.3 ± 2.4	0.0 ± 0.00	0 ± 0.0
pH 10	6.8 ± 0.3	33.3 ± 6.6	9.8 ± 2.4	0.3 ± 0.07	11 ± 2.7
pH 10.5	6.8 ± 0.2	33.9 ± 6.4	8.2 ± 0.7	0.4 ± 0.07	14 ± 1.1
pH 11	6.8 ± 0.2	31.3 ± 7.3	8.6 ± 0.3	0.4 ± 0.10	16 ± 0.6
pH 11.5	6.8 ± 0.2	31.1 ± 6.8	10.0 ± 0.3	0.5 ± 0.10	15 ± 2.4
pH 12	6.7 ± 0.2	33.5 ± 7.2	9.0 ± 1.6	0.6 ± 0.16	20 ± 1.0

±: standard deviation across four replica experiments.