薄荷药渣堆肥化试验可行性研究

Feasibility study of aerobic composting with mint residual

目的:综合评价薄荷中药渣堆肥腐熟程度,为薄荷中药渣堆肥化提供理论依据。方法:采用发酵装置进行为期28 d的模拟堆肥过程,测定不同堆肥时期的温度、pH值、C/N和发芽指数等控制参数。结果:堆肥化过程中升温期为5 d,≥50℃的高温期持续7 d,最高温度可达59℃。pH值逐渐升高到6.89;C/N由开始的34降至18;GI值达80%以上。结论:薄荷药渣是一种结构良好、富含植物养分的优质堆肥化原料,经堆肥化处理可获得一种稳定、成熟的优质有机肥或土壤改良剂。

Objective： The decomposed degree of mint residues in compost was comprehensively evaluated to provide theory basis for recycling use of the waste. Methods： A laboratory scale composting was run for 28 days and some physiochemical and biological indicators were determined during composting process. Results： The mesophilic phase lasted for 5 days, and thermophilic phase（more than 50℃） kept for 7 days with the highest temperature of 59 ℃. pH value increased gradually to 6.89. C/N ratio dropped significantly from 34 to 18 after 28 days, and GI was up more than 80%.Conclusion： Mint residual, as a kind of composting materials with a good structure and rich in plant nutrients, can be composted into a stable, mature and high quality organic fertilizer or soil conditioner.