Tan Ze Sen, Manogaran M Devendran, Shamsuddin Rashid, Hakimi Mohd, Looi Lee Wen, Woo Kai Tong, Liew Chin Seng, Qomariyah Lailatul
Chemical Engineering Department, Faculty of Engineering, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia.
Centre of Carbon Capture, Utilisation and Storage, Institute of Sustainable Energy and Resources, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia.
Food Technol Biotechnol. 2025 Jun;63(2):149-158. doi: 10.17113/ftb.63.02.25.8904.
The rapid growth of the Malaysian population has led to an increase in kitchen waste, especially inedible organic kitchen waste, which is generally disposed of in landfills and pollutes the environment. Apart from this, the increasing demand for chicken products in Malaysia has led to a significant increase in chicken manure production. As anaerobic digestion continues to be explored, there are concerns about the utilization of the digestate from chicken manure. Therefore, this study addresses the challenge of treating kitchen waste and chicken manure digestate in Malaysia by investigating the effectiveness of composting and vermicomposting methods through comparative analysis. By integrating kitchen waste, particularly spent coffee grounds, bone waste and used kitchen towels, this study aims to improve the imbalanced physicochemical properties of digestate from chicken manure.
Before composting, the kitchen waste and chicken manure digestate were characterised to determine the initial physicochemical properties. Four composting setups comprising the substances were established to study the physical appearance, temperature and pH profile, the increase in nitrogen, phosphorus and potassium content, and the mass reduction of the final compost after 50 days of composting.
The vermicompost with kitchen waste additives showed a significant nutrient improvement with an NPK mass ratio of 1:3.57:6.58 and a lower moisture mass fraction of 48.92 %, which requires the shortest maturation time (20 days) and the highest mass reduction (55.11 %).
The novelty of this research is the valorisation of organic kitchen waste and chicken manure digestate as biofertiliser. The end result is achieved by promoting a sustainable alternative to exploit kitchen waste instead of the traditional approach of landfilling waste. At the same time the problem of digestate is addressed, particularly its unbalanced physicochemical properties, especially its macronutrients, pH and moisture content. In contrast to previous studies, this work investigates the effectiveness of both conventional composting and vermicomposting with the incorporation of organic kitchen waste, namely spent coffee grounds, bone meal and used kitchen towels, to improve the physicochemical properties of digestate.
马来西亚人口的快速增长导致厨余垃圾增加，尤其是不可食用的有机厨余垃圾，这些垃圾通常被丢弃在垃圾填埋场，污染环境。除此之外，马来西亚对鸡肉产品需求的增加导致鸡粪产量大幅上升。随着厌氧消化技术不断被探索，人们对鸡粪沼渣的利用存在担忧。因此，本研究通过比较分析堆肥和蚯蚓堆肥方法的有效性，来应对马来西亚厨余垃圾和鸡粪沼渣的处理挑战。通过整合厨余垃圾，特别是用过的咖啡渣、骨头废料和用过的厨房毛巾，本研究旨在改善鸡粪沼渣理化性质失衡的问题。
在堆肥之前，对厨余垃圾和鸡粪沼渣进行表征，以确定其初始理化性质。建立了四个包含这些物质的堆肥装置，以研究堆肥50天后最终堆肥的物理外观、温度和pH值变化、氮、磷、钾含量的增加以及质量减少情况。
添加厨余垃圾添加剂的蚯蚓堆肥显示出显著的养分改善，氮磷钾质量比为1:3.57:6.58，较低的水分质量分数为48.92%，成熟时间最短（20天），质量减少率最高（55.11%）。
本研究的新颖之处在于将有机厨余垃圾和鸡粪沼渣转化为生物肥料。最终结果是通过推广一种可持续的替代方法来利用厨余垃圾实现的，而不是采用传统的垃圾填埋方法。同时解决了沼渣问题，特别是其理化性质失衡的问题，尤其是大量营养素、pH值和水分含量。与以往研究不同的是，本研究调查了传统堆肥和蚯蚓堆肥结合有机厨余垃圾（用过的咖啡渣、骨粉和用过的厨房毛巾）来改善沼渣理化性质的有效性。
Zotero 插件
