Co-gasification of meat and bone meal with coal in a fluidised bed reactor

Abstract After the Bovine Spongiform Encephalopathy illness appeared, the meat and bone meat (MBM) produced from animal residues became an important waste. In spite of being a possible fuel due to its heating value (around 21.4 MJ/kg), an important fraction of the meat and bone meal is being sent to landfills. The aim of this work is to evaluate the co-gasification of low percentages of meat and bone meal with coal in a fluidised bed reactor as a potential waste management alternative. The effect of the bed temperature (800–900 °C), the equivalence ratio (0.25–0.35) and the percentage of MBM in the solid fed (0–1 wt.%) on the co-gasification product yields and properties is evaluated. The results show the addition of 1 wt.% of MBM in a coal gasification process increases the gas and the liquid yield and decreases the solid yield at 900 °C and 0.35 of temperature and equivalence ratio operational conditions. At operational conditions of 900 °C and equivalence ratio of 0.35, the specific yield to gas ( y gas ) increases from 3.18 m 3 (STP)/kg to 4.47 m 3 (STP)/kg. The gas energy yield decreased 24.1% and the lower heating value of the gas decreases from 3.36 MJ/m 3 (STP) to 2.16 MJ/m 3 (STP). The concentration of the main gas components (H 2 , CO and CO 2 ) hardly varies with the addition of MBM, however the light hydrocarbon concentrations decrease and the H 2 S concentration increases at the higher temperature (900 °C).

[1]  K. McDonnell,et al.  Dispersion modelling and measurement of emissions from the co-combustion of meat and bone meal with peat in a fluidised bed. , 2006, Bioresource technology.

[2]  J. M. Lee,et al.  Coal gasification characteristics in an internally circulating fluidized bed with draught tube , 1997 .

[3]  Xinmin Zhan,et al.  Effect of the solid content on anaerobic digestion of meat and bone meal. , 2009, Bioresource technology.

[4]  I. Gulyurtlu,et al.  Measurements of dioxin emissions during co-firing in a fluidised bed , 2007 .

[5]  M. Cayuela,et al.  Soil application of meat and bone meal. Short-term effects on mineralization dynamics and soil biochemical and microbiological properties , 2008 .

[6]  A. Chaala,et al.  Recycling of meat and bone meal animal feed by vacuum pyrolysis. , 2003, Environmental science & technology.

[7]  R. A. Flores,et al.  Factors contributing to the poor bulk behavior of meat and bone meal and methods for improving these behaviors. , 2007, Bioresource technology.

[8]  Gloria Gea,et al.  Kinetic study of meat and bone meal pyrolysis : an evaluation and comparison of different possible kinetic models , 2005 .

[9]  M H Al-Dahhan,et al.  Anaerobic digestion of animal waste: effect of mixing. , 2005, Bioresource technology.

[10]  R. Font,et al.  Dioxin production during the thermal treatment of meat and bone meal residues. , 2005, Chemosphere.

[11]  Kyoung S. Ro,et al.  Catalytic Wet Gasification of Municipal and Animal Wastes , 2007 .

[12]  Shane Ward,et al.  Behaviour of meat and bonemeal/peat pellets in a bench scale fluidised bed combustor , 2001 .

[13]  Saqib Mukhtar,et al.  Co-gasification of blended coal with feedlot and chicken litter biomass , 2005 .

[14]  E. Kakaras,et al.  Meat and bone meal as secondary fuel in fluidized bed combustion , 2007 .

[15]  Todd Pugsley,et al.  Hydrogen production via gasification of meat and bone meal in two-stage fixed bed reactor system , 2009 .

[16]  R. Font,et al.  Comparison between emissions from the pyrolysis and combustion of different wastes , 2013 .

[17]  K. Svoboda,et al.  Gasification of coal and PET in fluidized bed reactor , 2006 .

[18]  D. G. Roberts,et al.  Gasification behaviour of Australian coals at high temperature and pressure , 2006 .

[19]  Rafael Kandiyoti,et al.  The characterisation of tars produced during the gasification of sewage sludge in a spouted bed reactor , 2004 .

[20]  J. Arauzo,et al.  Influence of temperature and heating rate on the fixed bed pyrolysis of meat and bone meal , 2006 .

[21]  B. Miller,et al.  Biomass Gasification as a Means of Carcass and Specified Risk Materials Disposal and Energy Production in the Beef Rendering and Meatpacking Industries , 2007 .

[22]  E. Pavlidou,et al.  Experimental investigation of fluidised bed co-combustion of meat and bone meal with coals and olive bagasse , 2006 .

[23]  Isabel Cabrita,et al.  Co-combustion of coal and meat and bone meal , 2005 .

[24]  O. Senneca,et al.  Characterisation of meat and bone mill for coal co-firing , 2008 .

[25]  H. Spliethoff,et al.  CFD simulation and experimental validation of co-combustion of chicken litter and MBM with pulverized coal in a flow reactor , 2008 .

[26]  P. Grammelis,et al.  Pyrolysis and combustion behaviour of coal-MBM blends. , 2007, Bioresource technology.

[27]  G. Sakellaropoulos,et al.  Mineral matter effects in lignite gasification , 2002 .