Effect of Cleaning Milk Equipment with Plant Material on Microbial Load, Quality and Organoleptic Character of Milk

Ensuring the safety and quality of milk requires effective sanitation of milk-handling equipment to minimize microbial contamination. This study examined the antimicrobial effectiveness of Eucalyptus globulus and Ruta chalepensis as natural cleaning agents compared to conventional synthetic detergents. Equipment cleaned with plant-based solutions significantly reduced microbial loads, including total bacterial count (TBC), coliforms, and lactic acid bacteria (TLAB), with reductions exceeding those observed with conventional detergents (p < 0.05). Lower titratable acidity in milk processed using plant-treated equipment indicated delayed spoilage and extended shelf life. Sensory evaluation by trained panelists revealed improved flavor, texture, and overall acceptability in milk cleaned with plant-based agents, outperforming detergent-cleaned samples (p < 0.05). The antimicrobial properties of Eucalyptus globulus stem from its phytochemicals, such as eucalyptol and α-pinene, which disrupt bacterial cell membranes, effectively targeting gram-positive and gram-negative bacteria. Ruta chalepensis owes its antibacterial activity to phenolics and flavonoids, which inhibit bacterial growth through oxidative stress and enzyme disruption. These bioactive compounds contribute not only to reduced microbial loads but also to enhanced sensory qualities of milk, making the plant-based agents promising alternatives to chemical cleaners. The findings suggest that Eucalyptus globulus and Ruta chalepensis offer sustainable, eco-friendly solutions for dairy sanitation, effectively reducing microbial contamination while enhancing milk quality. These natural agents align with the growing consumer preference for environmentally sustainable practices in food production. Further research is recommended to optimize their application methods, evaluate residue safety, and investigate their long-term impact on milk-handling equipment and microbial resistance patterns. By integrating these plant-based solutions into dairy sanitation practices, producers can achieve safer, higher-quality milk while reducing reliance on synthetic chemicals.