Department of Civil Engineering, National Institute of Technology, Mizoram, Aizawl, 796012, Mizoram, India.
State Institute of Rural Development & Panchayati Raj, Aizawl, 796015, Mizoram, India.
Environ Monit Assess. 2024 Nov 18;196(12):1205. doi: 10.1007/s10661-024-13395-3.
The demand for strategic and environment-friendly swine waste (SW) management is critical in the northeastern states of India, which account for 46.7% of the country's total swine population. This paper examines nutrient-rich compost production from SW with minimal negative environmental fallout, using cow dung microbiological inoculum and sawdust bulking agent for expeditious rotary drum composting. Aerobic biodegradation conducted in a rotary drum composter (RDC), raised the feedstock temperature to > 40 °C in just 24 h, which stimulated thermophilic decomposition. The thermophilic phase remained for 16 days in the cow dung-amended 10:1:1 (swine waste:cow dung:sawdust) trial (RDC1) versus 7 days for the sawdust-amended 10:1 (swine waste:sawdust) trial (RDC2). After 20 days, the RDC1 product exhibited superior nutritional characteristics, with a total nitrogen content of 2.52%, a significantly reduced coliform population, and an overall weight loss of 25%. These findings highlight that incorporating cow dung (10% w/w) into SW and bulking agents through RDC produces high-quality compost in just 20 days. Thus, the livestock industry benefits significantly from this laboratory-scale method of improved waste management by producing valuable bioproducts via RDC.
印度东北部各州对战略性且环保的猪粪（SW）管理的需求至关重要，因为这些地区的猪只存栏量占印度全国总量的 46.7%。本文研究了利用牛粪微生物接种剂和木屑膨松剂，通过快速旋转滚筒堆肥法从 SW 中生产富营养堆肥，以减少对环境的负面影响。在旋转滚筒堆肥器（RDC）中进行好氧生物降解，在 24 小时内将原料温度提高到>40°C，从而刺激嗜热分解。在牛粪添加量为 10:1:1（猪粪：牛粪：木屑）的试验（RDC1）中，嗜热阶段持续了 16 天，而在木屑添加量为 10:1 的试验（RDC2）中仅持续了 7 天。20 天后，RDC1 产品表现出更好的营养特性，总氮含量为 2.52%，大肠菌群数量显著减少，总重量损失 25%。这些发现表明，通过 RDC 将牛粪（10%w/w）和木屑膨松剂添加到 SW 中，可以在短短 20 天内生产出高质量的堆肥。因此，通过 RDC 生产有价值的生物制品，这种实验室规模的改进废物管理方法使畜牧业受益匪浅。
