为了对比研究直流电和交流电对猪粪堆肥腐熟效果的影响,以新鲜猪粪和玉米秸秆为原料,在好氧堆肥的基础上,分别施加3V直流电(DC)和3V交流电(AC),以不施加电场作为对照(CK),进行为期42d的堆肥实验.结果表明:CK、DC、AC处理堆体高温期(＞50℃)分别持续了9,9,8d,最高温度分别为68.3,69.3,76.5℃;堆肥结束时,CK、DC、AC处理堆体pH值分别为7.71、7.92、7.61,EC值分别为3.75,3.11和3.82mS/cm,C/N分别为11.40、10.51、11.96,各处理堆体理化性质均符合无害化的基本要求;堆肥结束时,CK、DC、AC处理含水率分别为55.35%、54.70%、45.45%,种子发芽指数(GI)分别为76%、99%、87%,胡敏酸与富里酸比值(HA/FA)分别为1.53、2.03、1.62.总之,直流电使堆体腐熟时间缩短了18%,促进猪粪堆肥腐熟效果比交流电更好;交流电使堆体最高温度升高约8℃,但交流电明显降低了堆体含水率.
Abstract
To comparatively investigate the influences of direct current (DC) and alternating current (AC) on the composting maturity of pig manure, fresh pig manure and corn stalks were utilized as raw materials. Based on aerobic composting, 3V DC and 3V AC were respectively applied, with no electric field application serving as the control (CK). A 42-day composting experiment was carried out. The results demonstrated that the high-temperature periods (＞50℃) of the CK, DC, and AC treatments lasted for 9, 9, and 8days respectively, and the maximum temperatures were 68.3, 69.3, and 76.5℃ respectively. At the conclusion of composting, the pH values of the CK, DC, and AC treatments were 7.71, 7.92, and 7.61 respectively, the EC values were 3.75, 3.11, and 3.82mS/cm respectively, and the C/N ratios were 11.40, 10.51, and 11.96 respectively. The physicochemical properties of the compost in each treatment conformed to the basic requirements for harmlessness. At the end of composting, the moisture contents of the CK, DC, and AC treatments were 55.35%, 54.70%, and 45.45% respectively, the seed germination indices (GI) were 76%, 99%, and 87% respectively, and the ratios of humic acid to fulvic acid (HA/FA) were 1.53, 2.03, and 1.62 respectively. In summary, DC reduced the composting maturity time by 18%, and the effect of DC in promoting the composting maturity of pig manure was superior to that of AC. AC increased the maximum temperature of the compost by approximately 8℃, but it significantly decreased the moisture content of the compost.
关键词
电场强化堆肥 /
腐熟度 /
好氧堆肥 /
交流电 /
直流电
Key words
aerobic compost /
alternating current /
degree of decomposition /
direct current /
electric field assisted composting
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基金
国家自然科学基金资助项目(U23A6001);吉林省自然科学基金资助项目(20210101109JC,YDZJ202301ZYTS232)
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