Optimizing Raw Material Mixing Equipment: Evidence from a Dairy Manufacturing Operation in Indonesia

Inefficient raw material mixing remains a major challenge in large-scale dairy processing, particularly in emerging-market production environments where controlling energy consumption and product uniformity is difficult. This study aims to improve the liquid raw material mixing system at a dairy manufacturing operation in Indonesia by increasing mixing homogeneity while reducing energy intensity during processing. A qualitative descriptive case study approach is employed, drawing on archival production records, organizational documents, operational processes, and patent analysis to examine existing mixing practices and applied process improvements. The study focuses on addressing sedimentation and the uneven distribution of granular solid materials during aseptic conveying and filling stages. Data from production logs indicate that the optimization of combined dynamic and static mixing configurations reduced variability in fruit granulate distribution from approximately 1.5–12% to 2–7.5%, while improving mixing stability and process continuity. Although the findings are specific to the studied case, they provide practical insights into how mixing system optimization can support product quality, operational efficiency, and sustainability objectives in dairy manufacturing under similar production constraints