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| Effects of biogas residue addition on humification of kitchen waste compost |
| Received:November 02, 2022 |
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| KeyWord:compost;kitchen waste;biogas residue;material degradation;humification |
| Author Name | Affiliation | E-mail | | LI Longtao | Hunan Soil and Fertilizer Institute, Hunan New Type Fertilizer Engineering and Technological Research Center, Changsha 410125, China | | | DONG Chunhua | Hunan Soil and Fertilizer Institute, Hunan New Type Fertilizer Engineering and Technological Research Center, Changsha 410125, China | | | RAO Zhongxiu | Hunan Soil and Fertilizer Institute, Hunan New Type Fertilizer Engineering and Technological Research Center, Changsha 410125, China | | | ZHANG Na | Hunan Soil and Fertilizer Institute, Hunan New Type Fertilizer Engineering and Technological Research Center, Changsha 410125, China | | | LI Weiyan | Hunan Soil and Fertilizer Institute, Hunan New Type Fertilizer Engineering and Technological Research Center, Changsha 410125, China | | | CHU Fei | Hunan Soil and Fertilizer Institute, Hunan New Type Fertilizer Engineering and Technological Research Center, Changsha 410125, China | | | HUANG Fengqiu | Hunan Soil and Fertilizer Institute, Hunan New Type Fertilizer Engineering and Technological Research Center, Changsha 410125, China | 839734142@qq.com |
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| Abstract: |
| In order to better understand the influence of biogas residue addition on humification of kitchen waste compost, three treatments were designed. In these three treatments, the ratio of kitchen waste and biogas residue were:4:0(T1); 3:1(T2); 1:3(T3). Rice straw was used as an auxiliary material for strip composting. The material degradation, humification degree, carbon and nitrogen loss, and compost quality of the kitchen waste were determined by measuring compost temperature, dry matter content, seed germination index, and total nitrogen, total organic carbon, humic acid, and fulvic acid content. The results of this study indicated that the available accumulated temperature ratio, degree of humus polymerization, and humification index of composting increased with the proportion of biogas residue. After 50 d, when composting was finished, the T2 treatment had the highest material degradation rate(37.16%), nitrogen content(23.89 g· kg-1), and germination index(90.59%). It also had a high available accumulated temperature ratio (63.73%), degree of humus polymerization(0.84), and humification index(7.78%). This study found that adding biogas residue improved the fermentation efficiency at the thermophilic stage of kitchen waste compost, enhanced the humification, and increased carbon and nitrogen losses. |
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