Changes of microbial population structure related to lignin degradation during lignocellulosic waste composting.
Microbial populations and their relationship to bioconversion during lignocellulosic waste composting were studied by quinone profiling. Nine quinones were observed in the initial composting materials, and 15 quinones were found in compost after 50days of composting. The quinone species Q-9(H2), Q-10 and Q-10(H2) which are indicative of certain fungi appeared at the thermophilic stage but disappeared at the cooling stage. Q-10, indicative of certain fungi, and MK-7, characteristic of certain bacteria, were the predominant quinones during the thermophilic stage and were correlated with lignin degradation at the thermophilic stage. The highest lignin degradation ratio (26%) and good cellulose degradation were found at the cooling stage and were correlated with quinones Q-9, MK-7 and long-chain menaquinones attributed to mesophilic fungi, bacteria and actinomycetes, respectively. The present findings will improve the understandings of microbial dynamics and roles in composting, which could provide useful references for development of composting technology.
Huang
Dan-Lian
DL
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
Zeng
Guang-Ming
GM
Feng
Chong-Ling
CL
Hu
Shuang
S
Lai
Cui
C
Zhao
Mei-Hua
MH
Su
Feng-Feng
FF
Tang
Lin
L
Liu
Hong-Liang
HL
D001419:Bacteria / Q000302:isolation & purification* / Q000378:metabolism; D002482:Cellulose / Q000378:metabolism*; D005658:Fungi / Q000302:isolation & purification* / Q000378:metabolism; D006868:Hydrolysis; D008031:Lignin / Q000378:metabolism*; D012987:Soil
D012987:Soil; D002482:Cellulose; D008031:Lignin