Treatment Effects of Ectopic Microbial Fermentation on Layer Hens Waste

doi:10.3969/j.issn.1000-6362.2020.08.001

Abstract

Abstract: In order to provide theoretical basis for application of microbial ectopic fermentation system technology and solve the environmental pollution problem of laying hens, microbial ectopic fermentation system was used to treat the waste produced from layer breeding and to reduce environmental pollution. The specific procedures were mixed corn straw and coconut shell according to the mass ratio of 2:1, evenly added microbial agents as the ectopic fermentation system material. The initial moisture and thickness of the litter were adjusted to 51.97% and 60cm, respectively, and filled it in the ectopic fermentation system. After 4 days of pre-fermentation, laying hens breeding waste was treated by the ectopic fermentation system. From the beginning of the experiment on October 28, 2019 to the end of the experiment on January 8, 2020, the samples were taking from the upper layer (0-20cm), middle layer (20-30cm), and lower layer (30-40cm) in the different stage of experiment, further to explore the changes of physical and chemical properties, nutrients components and microbial quantities. The results showed that there were no significant differences in the temperature, moisture content, pH and conductivity of different packing layers in the ectopic fermentation system. The maximum temperature of the fermentation system was between 50-75℃, the moisture content was between 45%-58% and the pH value was changed in the range of 6.10-8.97, and the conductivity showed a trend of continuous increase in the all experimental process. In the end of the experiment, the average pH of the litter was about 8.0, which could ensure the stable operation of the fermentation system. Compared with the beginning of the experiment, the TN, TP and TK contents of different layers of litter increased significantly in the end of the experiment (P<0.01), while the organic matter content and C/N showed a decreasing trend. The organic matter content was insignificant difference and the C/N was significant (P<0.01). The absorption coefficients of the litter for wastewater and feces was 1.05 and 3.50, respectively in the end. The fermentation system was dominated by bacterial activity, followed by actinomycetes. The nutrient content of the fillers was in accordance with the standards of NY525-2012 for total nutrients and organic matter mass fractions. This fermentation system can effectively degrade and absorb layer breeding waste.

Key words: Ectopic fermentation system, Layer breeding waste, Microorganism, Poultry waste

CLC Number:

LI Lu-yao, LI Jia-bin, FENG Shuo, SONG Ting-ting, ZHANG Yan-rong, ZHU Chang-xiong, GENG Bing. Treatment Effects of Ectopic Microbial Fermentation on Layer Hens Waste[J]. Chinese Journal of Agrometeorology, 2020, 41(08): 473-482.

References

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