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Construction and application of a high efficient complex microbial system to degrade dead-pig carcass in compost and assessment of its effect*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2020 03
Page:
1-11
Research Field:
Articles
Publishing date:

Info

Title:
Construction and application of a high efficient complex microbial system to degrade dead-pig carcass in compost and assessment of its effect*
Author(s):
JI Shaoze1 GOU Changlong1 ZHANG Xiqing1 WANG Yu1 TIAN Jiaqi1 LI Chen1 LIU Jijun2 &GAO Yunhang 1**
1College of Animal Science and Tec hnology, Jilin Agricultural University, Changchun 130118, China
2College of Animal Science and Tec hnology, China Agricultural University, Beijing 100083, China
Keywords:
dead -pig degrading bacteria proteinase lipase complex microbial system
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.07007
DocumentCode:

Abstract:
In order to shorten the composting time and improve the quality of compost products , the strains had been screened from dead-pigs composting and a cultured system was constructed by the strains of higher lipase activity and protease activity. Then, the isolates was mixed after antagonistic verification and inoculated in dead-pig and sawdust composting with different doses. The results showed that a total of 36 bacteria with high dead-pig carcass degrading capacity and ten of them with higher lipase activity and protease activity were selected finally. The selected isolates were identified by molecular biology. After studying the antagonism among the strains, the isolates was constructed into five cultured systems as A, B, C, D and E. Cultured system E with strong protein and lipase activity was further selected for cadaveric composting experiment, t he results showed that: During composting, the highest temperatures of the control group and the inoculated group ( 2% and 4%) were 56.3 ℃, 60.8 ℃ and 61.2 ℃; The composting temperature of the 2% and 4% inoculation group could reach 55.0 ℃ and maintain at the high temperature for about 7 d, which is significantly higher than control (3 d, P < 0.01) ; At the end of composting, the dead-pig degradation rate of the inoculation groups (0%, 2% and 4%) were 78.7%, 97.7% and 98.0%. Our results indicated that sufficient amount inoculation of cultured system E ( > 2%) could effectively increase composting temperature, maintain the high temperature phase for a longer period of time and accelerate the degradation of dead-pigs by composting.

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Last Update: 2019-09-04