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nutrient Evaluation of Dining Center Food Waste and Comparison to Monogastric and Ruminant Feedstuffs

Open Journal of Animal Sciences 2023年第3期13卷 323-335页

作者： Nelsa M. Beckman Phillip A. Lancaster Haley K. Otott Rachel N. Kort Katherine M. Krauss Melissa A. Schrader Jordan T. Gebhardt Charles R. Stark Chad B. Paulk Department of Grain Science and Industry Kansas State University Manhattan USA Department of Clinical Sciences Kansas State University Manhattan USA Department of Housing and Dining Kansas State University Manhattan USA Department of Diagnostic Medicine Pathobiology Kansas State University Manhattan USA

The objective of this study was to analyze the nutrient composition and variability of university dining hall food waste and compare it with common feedstuffs used in ruminant and monogastric diets. Food waste was categorized into two initial streams: mainstream (MS) from the serving line and vegetable preparation (VP) from the kitchen. Waste was collected from the Kramer Dining Center, Kansas State University, resulting in 30 daily samples. Waste was weighed and ground to homogenous particle size. Daily samples of MS and VP were analyzed for nutrient composition, where results were combined to calculate the nutrient profile of a hypothetical mixed food waste stream (MX) composited by total weight. Data were analyzed using R statistical software (v 4.2.2). Moisture and neutral detergent fiber (NDF) were greater in VP (P , while ether extract (EE) was less compared to MS and MX. Crude protein (CP) was greater (P nutrients (TDN) and energy were greater in MS food waste than in MX, which was also greater than VP (P content, measured by standard deviation, was similar (P > 0.05) among streams for NDF, nitrogen-corrected neutral detergent fiber, acid detergent insoluble crude protein, CP, ash, lignin, and digestible and metabolizable energy. Dry matter and EE variation were greater (P < 0.05) in MS, whereas VP was less (P < 0.05) compared to MX. Standard deviation increased (P < 0.05) in MS and MX for neutral detergent insoluble crude protein, TDN, and gross energy when compared to VP. Despite having 70% - 80% moisture, dining hall food waste does have nutritive value and the potential to be included in ruminant and monogastric diets. Further research needs to be done to understand the value of including it in animal diets.

关键词： Food Waste Feedstuffs Monogastric Ruminant nutrient variability

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