Design and Experiment of High Temperature and Rapid Fermentation Equipment for Livestock and Poultry Excrement
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    Abstract:

    In order to overcome the shortcomings of traditional manure fermentation modes, such as equipment simple, low efficiency, high energy consumption, untotal fermentation and secondary pollution, a new kind of equipment with high temperature and rapid fermentation for livestock and poultry excrement was developed. The operational principle and process flow of the equipment were introduced. The overall unit and the key parts such as major structure and mixing system were designed, calculated and analyzed by using finite element method. According to the requirement of fermentation process, using cow dung with water content of 55% as raw material, the temperature distribution and uniformity of the material in the tank was tested and analyzed, and the fermentation product was also tested. Experiment and test results showed that the whole fermentation process from incoming to outgoing materials lasted nine days, and the equipment consumed 1021kW·h, in the fourth day after the cow dung was put into the tank, the average temperature of materiel in the tank was 64.81℃, and the temperature uniformity coefficient of variation was 1%;the mass fraction, nutrient content and death rate of lumbricoid egg of produced organic fertilizer was 53.5%, 5.36% and 100%, respectively;the number of fecal coliforms fecal was less than two per gram. All of those indices met the requirement of national standard of organic fertilizer industry. The research result provided reference for the research and development of high temperature and fast fermentation equipment for animal manure.

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History
  • Received:July 10,2018
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  • Online: November 10,2018
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