title: Comparison of bacterial community structure and dynamics during the thermophilic composting of different types of solid wastes: anaerobic digestion residue, pig manure and chicken manure.
abstract: This study investigated the impact of composting substrate types on the bacterial community structure and dynamics during composting processes. To this end, pig manure (PM), chicken manure (CM), a mixture of PM and CM (PM + CM), and a mixture of PM, CM and anaerobic digestion residue (ADR) (PM + CM + ADR) were selected for thermophilic composting. The bacterial community structure and dynamics during the composting process were detected and analysed by polymerase chain reaction-denaturing gradient gel electrophoresis (DGGE) coupled with a statistic analysis. The physical-chemical analyses indicated that compared to single-material composting (PM, CM), co-composting (PM + CM, PM + CM + ADR) could promote the degradation of organic matter and strengthen the ability of conserving nitrogen. A DGGE profile and statistical analysis demonstrated that co-composting, especially PM + CM + ADR, could improve the bacterial community structure and functional diversity, even in the thermophilic stage. Therefore, co-composting could weaken the screening effect of high temperature on bacterial communities. Dominant sequencing analyses indicated a dramatic shift in the dominant bacterial communities from single-material composting to co-composting. Notably, compared with PM, PM + CM increased the quantity of xylan-degrading bacteria and reduced the quantity of human pathogens.
authors: Life Science College, Northeast Agricultural University, Harbin, China; Innovation Base of Groundwater and Environmental Systems Engineering, Chinese Research Academy of Environmental Science, Beijing, 100020, China.
authors: Caihong
authors: C
authors: Song
authors: Mingxiao
authors: M
authors: Li
authors: Xuan
authors: X
authors: Jia
authors: Zimin
authors: Z
authors: Wei
authors: Yue
authors: Y
authors: Zhao
authors: Beidou
authors: B
authors: Xi
authors: Chaowei
authors: C
authors: Zhu
authors: Dongming
authors: D
authors: Liu
mesh_terms: D000818:Animals; D001419:Bacteria / Q000145:classification* / Q000254:growth & development*; D058448:Biota; D001711:Biotransformation; D002645:Chickens; D004269:DNA, Bacterial / Q000235:genetics; D003627:Data Interpretation, Statistical; D058645:Denaturing Gradient Gel Electrophoresis; D008372:Manure; D009930:Organic Chemicals / Q000378:metabolism; D016133:Polymerase Chain Reaction; D012987:Soil; D012988:Soil Microbiology; D062611:Solid Waste; D013552:Swine
chemical_list: D004269:DNA, Bacterial; D008372:Manure; D009930:Organic Chemicals; D012987:Soil; D062611:Solid Waste