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An experimental investigation of the combustion performance of human faeces

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ABSTRACT

Dry human faeces have a Higher Heating Value (HHV) of 24 MJ/kg.

Faeces combustion was investigated using a bench-scale downdraft combustor test rig.

Combustion temperature of 431–558 °C was achieved at air flow rate of 10–18 L/min.

Fuel burn rate of 1.5–2.3 g/min was achieved at air flow rate of 10–18 L/min.

Combustion temperature of up to 600 ± 10 °C can handle 60 wt.% moisture in faeces.

Combustion temperature of up to 600 ± 10 °C can handle 60 wt.% moisture in faeces.

No MeSH data available.


(a–d): Human Faeces: (a) Type 2 fresh sample (as-received basis, prior to drying. (b) Mixture of Type 2, 5 and 6 fresh sample (as-received basis, prior to drying). (c) Type 2 sample (after drying). (d) Mixture of Type 2, 5 and 6 sample (after drying).
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f0020: (a–d): Human Faeces: (a) Type 2 fresh sample (as-received basis, prior to drying. (b) Mixture of Type 2, 5 and 6 fresh sample (as-received basis, prior to drying). (c) Type 2 sample (after drying). (d) Mixture of Type 2, 5 and 6 sample (after drying).

Mentions: The various stool types also exhibited different moisture content levels, with the Type 1 having the least moisture content (∼50%) and Type 7 having the most (>80%). However, some of the samples in the study had definite forms as described in the BSC (Fig. 4a) while other samples were a mixture, including Type 2 and Types 4–6 stool characteristics, in some instances (Fig. 4b). Because of the heterogeneous dispersion of moisture content across each sample and the mixture of stool types even within a given sample, the various classes of stools are observed to exhibit different drying profiles (Fig. 4c and d) and the overall moisture content level in the sample did not defer significantly. For instance, the sample in Fig. 4a and b had ∼65 and ∼76 wt.% moisture, although the Type 6 section of the mixed sample ∼86 wt.% moisture.


An experimental investigation of the combustion performance of human faeces
(a–d): Human Faeces: (a) Type 2 fresh sample (as-received basis, prior to drying. (b) Mixture of Type 2, 5 and 6 fresh sample (as-received basis, prior to drying). (c) Type 2 sample (after drying). (d) Mixture of Type 2, 5 and 6 sample (after drying).
© Copyright Policy - CC BY
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4998016&req=5

f0020: (a–d): Human Faeces: (a) Type 2 fresh sample (as-received basis, prior to drying. (b) Mixture of Type 2, 5 and 6 fresh sample (as-received basis, prior to drying). (c) Type 2 sample (after drying). (d) Mixture of Type 2, 5 and 6 sample (after drying).
Mentions: The various stool types also exhibited different moisture content levels, with the Type 1 having the least moisture content (∼50%) and Type 7 having the most (>80%). However, some of the samples in the study had definite forms as described in the BSC (Fig. 4a) while other samples were a mixture, including Type 2 and Types 4–6 stool characteristics, in some instances (Fig. 4b). Because of the heterogeneous dispersion of moisture content across each sample and the mixture of stool types even within a given sample, the various classes of stools are observed to exhibit different drying profiles (Fig. 4c and d) and the overall moisture content level in the sample did not defer significantly. For instance, the sample in Fig. 4a and b had ∼65 and ∼76 wt.% moisture, although the Type 6 section of the mixed sample ∼86 wt.% moisture.

View Article: PubMed Central - PubMed

ABSTRACT

Dry human faeces have a Higher Heating Value (HHV) of 24 MJ/kg.

Faeces combustion was investigated using a bench-scale downdraft combustor test rig.

Combustion temperature of 431–558 °C was achieved at air flow rate of 10–18 L/min.

Fuel burn rate of 1.5–2.3 g/min was achieved at air flow rate of 10–18 L/min.

Combustion temperature of up to 600 ± 10 °C can handle 60 wt.% moisture in faeces.

Combustion temperature of up to 600 ± 10 °C can handle 60 wt.% moisture in faeces.

No MeSH data available.