Thermochemical pretreatment of meat and bone meal and its effect on methane production

2009, Volume 3, Issue 3

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Frontiers of Environmental Science & Engineering >> 2009, Volume 3, Issue 3 doi: 10.1007/s11783-009-0031-6

Thermochemical pretreatment of meat and bone meal and its effect on methane production

Department of Civil Engineering, National University of Ireland, Galway, Ireland;

Available online: 2009-09-05

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Abstract

Since the solubilization of meat and bone meal (MBM) is a prerequisite in many MBM disposal approaches, enhancement of the solubilization by means of thermochemical pretreatment was investigated in this study at two temperatures (55°C and 131°C) and six sodium hydroxide (NaOH) concentrations (0, 1.25, 2.5, 5, 10 and 20g/L). The MBM volatile solid (VS) reduction ratio was up to 66% and 70% at 55°C and 131°C, respectively. At the same temperature, the VS reduction ratio increased with the increase in the dosage of NaOH. The study on the methane (CH) production potential of pretreated MBM shows that the addition of NaOH at 55°C did not cause the inhibition of the succeeding CH production process. However, CH production was inhibited by the addition of NaOH at 131°C. The CH production potential was in the range of 389 to 503mL CH/g VS MBM and 464 to 555mL CH/g VS MBM at 55°C and 131°C, respectively.

Keywords

thermochemical pretreatment ; meat and bone meal ; solid reduction ; solid solubilization ; methane production potential

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