玉米秸秆添加对果蔬废弃物沼渣堆肥效果的影响

Effect of Adding Corn Straw on Composting Effect of Vegetable Waste Biogas Residue

为实现果蔬废弃物沼渣的无害化处理和资源化利用,文章以果蔬废弃物沼渣为原料,添加不同比例的玉米秸秆进行堆肥试验,对物料堆肥过程的温度、含水率、有机质等指标进行测定和分析,探讨不同配比条件下堆肥的腐熟速度及预期肥效。结果表明,添加玉米秸秆的果蔬废弃物沼渣均能顺利进行好氧堆肥,能够满足无害化卫生要求,30 d堆肥结束后的堆体含水率低于40%,有机质损失率最高为23.17%,均达到腐熟或充分腐熟程度,养分,pH值,重金属等产品质量指标均能满足有机肥料标准的要求,其中沼渣与秸秆的最佳混配比为2∶1。整体来说,添加玉米秸秆有利于加快果蔬废弃物沼渣堆肥进入高温发酵期的速度,加快堆肥的腐熟,提高沼渣堆肥产品质量。

In order to promote the harmless treatment and recycle utilization of biogas residue of fruit and vegetable wastes(FVW),co-composting experiments of biogas residues and corn straw with different material ratios(dry weight)were tested.The temperature,moisture content and organic matter during the composting process were measured and analyzed,and the composting maturity and fertilizer efficiency under different conditions was discussed.The results showed that the biogas residue of FVW added with corn straw could be composted smoothly,and could meet the requirements of harmless.After 30 days of composting,the moisture content of the compost was less than 40%,and the maximum loss rate of organic matter was 23.17%.The compost products was in maturity,and the product quality indexes including nutrients,pH and heavy metals met the standard for organic fertilizer.The best mixing ratio of biogas residue and corn straw was 2∶1.In all,the addition of corn stalk could hasten the arrival of high temperature fermentation period,speed up the composting and improve the products quality.