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ON THE POSSIBILITY OF USING POULTRY LITTER AS A BIOFUEL FOR ELECTRICITY PRODUCTION

Rafail Isemin

Abstract

Waste from poultry farms represents the greatest danger to people and the environment among all types of bio waste. Approximate estimates show that in Russia up to 15 million tons of manure and a mixture of litter with sawdust or straw are formed annually. The original litter is a toxic substance; the main bacteria in the litter are E. coli and Salmonella. The process of torrefaction of a mixture of manure and sawdust was studied. The torrefaction proceeds in a reactor consisting of three sections with horizontal trays on which the processed material is moved with help of a two-bladed stirrer from the loading point to the discharge point from one plate to the other. The reactor has a jacket heated with a high-temperature oil. The analysis of content of pathogenic microflora after torrefaction shows that only low-temperature pyrolysis at 250 В°C and treatment time of 60 min. allows full disinfection of this type of waste. To increase the outlet of gaseous products of low-temperature pyrolysis and to reduce the tar content in gaseous products, we proposed to pass the gaseous products obtained through a bed of carbonaceous particles heated to 800-1000 В° C. As a result of laboratory studies, the following characteristics of synthesis gas were obtained: ?2 content - 49.0%, CO content - 46%, net calorific value - 11.34 MJ/Nm3, synthesis gas outlet - 0.9 Nm3 per 1 kg of raw material. The results of preliminary calculations of the complex for manure with litter processing into biofuel pellets with a nominal capacity of 2 t/h for the final product (pellets).

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