三种干燥方式对粪污厌氧残余物化学性质的影响

发布时间：2019-05-17 16:54

【摘要】：为揭示干燥方式对粪污厌氧残余物化学性质的影响,开展了真空冷冻干燥、风干干燥和热风干燥对粪污p H值、氨氮、总氮、含盐量、总有机碳和溶解性有机碳的影响,对客观认识粪污理化性质和粪污厌氧残余物干燥方式的优选提供依据。研究结果显示真空冷冻干燥处理方式各化学指标相比于风干干燥和热风干燥方式数值较大,表明真空冷冻干燥处理过程能够维持粪污厌氧残余物化学形态和较高的含量。在此基础上,比较发现真空预冻3 h和预冻6 h对各化学指标的影响差异不显著。建议真空冷冻干燥并且预冻3 h作为粪污厌氧残余物相对较适宜的干燥方式,不仅能够较少地破坏粪污化学性质,同时具有操作简便、节省时间等优点。
[Abstract]:in ord to reveal that effect of the dry method on the chemical property of the waste-soil anaerobic residue, the effects of vacuum freeze-drying, air-drying drying and hot-air drying on the soil p-H value, ammonia nitrogen, total nitrogen, salt content, total organic carbon and dissolved organic carbon are carried out, It provides the basis for the objective knowledge of the physical and chemical properties of the soil and the drying mode of the anaerobic residue of the soil. The results show that the vacuum freeze-drying process can maintain the chemical morphology and high content of the anaerobic residue of the manure, compared with the air-drying and hot-air drying methods. On this basis, it was found that the effect of vacuum pre-freezing for 3h and pre-freezing on the chemical indexes was not significant. It is suggested that the vacuum freeze-drying and the pre-freezing of the pre-frozen 3h can be used as a relatively suitable drying method for the anaerobic residue of the manure, which not only can destroy the chemical property of the soil, but also has the advantages of simple and convenient operation, time saving and the like.
【作者单位】：东北农业大学资源与环境学院;农业部环境保护科研监测所;农业部大理农业环境科学观测实验站;天津农学院园艺园林学院;
【基金】：国家重点研发计划项目(2017YFD0800403) 天津市自然科学基金项目(16JCYBJC29700) 948项目(2014-S4,2016-X53) 公益性行业(农业)科研专项基金(201503119-06-01)~~
【分类号】：X713

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