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Use of additive to control odors and promote maturity of municipal kitchen waste during aerobic composting |
LI Yun1, YUAN Jing1, LI Guo-xue1, ZHANG Di-fang1, WANG Guo-ying1, ZHANG Bang-xi1,2, GONG Xiao-yan1 |
1. College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China;
2. Guizhou Institute of Soil and Fertilizer, Guiyang 550006, China |
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Abstract The aim of this study was improving the kitchen waste composting maturity and reducing the emission of odors (NH3 and H2S) during the process. Cornstalk, rice husks, sawdust and mushroom substrate were mixed respectively with the kitchen waste to give a mixture containing 15%(wet weight). The pure kitchen waste was composted as CK. All treatments had reached the requirements of maturity except CK. Kitchen waste mixed with the mushroom substrate treatment gave the highest maturity, it could increase the final germination index a lot compared to CK. Among these treatments, kitchen waste mixed with mushroom residue had the best reduction effect on NH3 emission, which made a reduction of 53.6% compared with CK. And kitchen waste mixed with the sawdust had the best reduction effect on H2S emission, which made a reduction of 84.08%. Kitchen waste mixed with the mushroom substrate had the lowest total nitrogen loss, the total nitrogen loss accounted for 8.70% of initial total nitrogen. And the total sulfur loss of kitchen waste mixed with the cornstalks treatment was the least among all treatments, accounted for 2.05% of initial total sulfur.
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Received: 20 July 2016
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