Journal
BIORESOURCE TECHNOLOGY
Volume 243, Issue -, Pages 294-303Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.06.124
Keywords
Composting; Phanerochaete chrysosporium; Bacterial community; Lead; Redundancy analysis
Funding
- Program for the National Natural Science Foundation of China [51521006, 51378190, 51579098, 51408206, 51508175]
- National Program for Support of Top-Notch Young Professionals of China
- Program for New Century Excellent Talents in University [NCET-13-0186]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
- Hunan Provincial Education Department [521293050]
- Hunan Provincial Science and Technology Plan Project [2016RS3026, 2015SK2001]
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The effects of Phanerochaete chrysosporium inoculation on bacterial community and lead (Pb) stabilization in composting of Pb-contaminated agricultural waste were studied. It was found that the bioavailable Pb was transformed to stable Pb after composting with inoculum of P. chrysosporium. Pearson correlation analysis revealed that total organic carbon (TOC) and carbon/nitrogen (C/N) ratio significantly (P < 0.05) influenced the distribution of Pb fractions. The richness and diversity of bacterial community were reduced under Pb stress and increased after inoculation with P. chrysosporium. Redundancy analysis indicated that C/N ratio, total organic matter, temperature and soluble-exchangeable Pb were the significant parameters to affect the bacterial community structure, solely explained 14.7%, 11.1%, 10.4% and 8.3% of the variation in bacterial community composition, respectively. In addition, the main bacterial species, being related to organic matter degradation and Pb stabilization, were found. These findings will provide useful information for composting of heavy metal-contaminated organic wastes. (C) 2017 Elsevier Ltd. All rights reserved.
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