Pilot-scale composting of typical multiple agricultural wastes: Parameter optimization and mechanisms
Bian, B (Bian, Bo)[ 1 ] ; Hu, XR (Hu, Xiuren)[ 1 ] ; Zhang, SP (Zhang, Shaopeng)[ 1 ] ; Lv, CX (Lv, Chengxu)[ 1 ] ; Yang, Z (Yang, Zhen)[ 1 ]*（杨朕） ; Yang, WB (Yang, Weiben)[ 1 ] ; Zhang, LM (Zhang, Limin)[ 1 ] 

[ 1 ] Nanjing Normal Univ, Sch Environm, Sch Chem & Mat Sci, Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Nanjing 210046, Jiangsu, Peoples R China

BIORESOURCE TECHNOLOGY，201909, 287

In this work, pilot-scale (100 kg of mixed wastes each time) composting of typical agricultural wastes, including chicken manure, vegetable leaves and rice husks with a mass ratio of 6:3:1, was studied. Effects of thermal phases and transformation time on performance, including moisture, nutrient, and carbon contents and C/N ratios of compost, were investigated. The optimal parameters were 75 +/- 5 degrees C and 18 h; the compost met the requirements of Chinese National Agricultural Organic Fertilizer Standard (NY525-2012). Mechanisms investigations demonstrated that, Bacillus and Sinibacillus played key roles in degrading high-molecular-weighted organic substances into small-molecular-weighted humic- and fulvic-acid-like matters, resulting in smaller particle size and loose structure of the product; rice husk particles acted as a conditioning agent and remained their originally morphology. The mechanism provided informative guidance for optimizing the process in practical application.

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https://www.sciencedirect.com/science/article/pii/S0960852419307126?via%3Dihub

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