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| Regulation effect of mineral addition during vermicomposting of biochemical disposal residues from kitchen wastes |
| Received:May 30, 2021 |
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| KeyWord:desulfurization gypsum;bone charcoal;kitchen wastes;vermicomposting |
| Author Name | Affiliation | E-mail | | MIAO Lijuan | College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China | | | WANG Yifan | College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China | | | ZHANG Mingyue | College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China | | | YING Yucui | College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China | | | ZHANG Chengye | College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China | | | FENG Yuning | College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China | | | WANG Lang | College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China | | | ZHU Weiqin | College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China | zhwq@hznu.edu.cn |
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| Abstract: |
| Recycling the biochemical disposal residue from kitchen wastes is a new challenge. This study aims to find solutions to the problems of high salinity and low decomposition rate of biochemical disposal residue from kitchen wastes. Desulfuration gypsum and bone charcoal were used as additives for vermicomposting biochemical residue from kitchen wastes, and were noted to cause the regulation effect and their variance. The results showed that the addition of desulfuration gypsum and bone charcoal promoted the growth and fertility of earthworms with higher growth recorded in bone charcoal supplemented vermicomposting. Furthermore, the earthworm activity increased the electrical conductivity(EC) and the total nutrient content in the vermicompost. In addition, the bone charcoal supplementation recorded higher pH, total nutrient content, and catalase(CAT) activity while decreased the EC, urease(UA) activity, and alkaline phosphatase(AKP) activity in the vermicomposting when compared with desulfurization gypsum. The changes in maturity degree indicated that both earthworm activity and the bone charcoal addition could contribute to reducing C/N and NH4+-N/NO3--N while increasing the levels of humus(HS), humic acid(HA), fulvic acid(FA), and seed germination index(GI) in the vermicompost. Therefore, it is possible to reduce salt concentration and improve the maturity degree by adding bone charcoal into the biochemical residues from kitchen wastes for vermicomposting. |
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