Plant-derived biochar amendment for compost maturity improvement and gaseous emission reduction in food waste composting: Insight from bacterial community and functions

被引:0
作者
Zhang L. [1 ]
Yang Y. [1 ]
Bao Z. [1 ,2 ]
Zhang X. [1 ,2 ]
Yao S. [1 ,2 ]
Li Y. [1 ]
Li G. [1 ,2 ]
Wang D. [3 ]
Li Q. [3 ]
Yuan J. [1 ,2 ]
机构
[1] Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing
[2] Organic Recycling Institute (Suzhou) of China Agricultural University, Wuzhong District, Suzhou
[3] Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Hainan, Haikou
基金
中国国家自然科学基金;
关键词
Bacterial community and functions; Food waste composting; Gaseous emissions; Maturity enhancement; Plant-derived biochar;
D O I
10.1016/j.chemosphere.2024.141457
中图分类号
学科分类号
摘要
This study assessed the impact of different plant-derived biochar (cornstalk, rice husk, and sawdust) on bacterial community and functions for compost maturity and gaseous emissions during the composting of food waste. Results showed that all biochar strengthened organic biotransformation and caused a higher germination index on day 12 (over 100%), especially for rice husk biochar to enhance the growth of Thermobifida related to aerobic chemoheterotrophy. Rice husk biochar also achieved a relatively higher reduction efficiency of methane (85.8%) and ammonia (82.7%) emissions since its greater porous structure. Besides, the growth of Pseudomonas, Pusillimonas, and Desulfitibacter was restricted to constrict nitrate reduction, nitrite respiration, and sulfate respiration by optimized temperature and air permeability, thus reducing nitrous oxide and hydrogen sulfide emissions by 48.0–57.3% by biochar addition. Therefore, rice husk biochar experienced the optimal potential for maturity increment and gaseous emissions mitigation. © 2024 Elsevier Ltd
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