Minimize environmental impact of dairy production through improve the life cycle. Part 2:

El-Tawabty, Mohamed O.; Samn, Alaa A. M.; Ghanem, Mohamed H.; A., Noura; Abou Taleb, Enas M.

doi:10.21608/ejchem.2025.376829.11621

	Minimize environmental impact of dairy production through improve the life cycle. Part 2: "Recovery of Proteins and Nutritional Components from Dairy Whey Waste via Spray Drying Technology"
Egyptian Journal of Chemistry
Volume 68, Issue 10, October 2025, Page 659-667 PDF (792.17 K)
Document Type: Original Article
DOI: 10.21608/ejchem.2025.376829.11621
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Authors
Mohamed O. El-Tawabty ¹; Alaa A. M. Samn²; Mohamed H. Ghanem²; Noura A.³; Enas M. Abou Taleb ⁴
¹6th of October City Authority, New Urban Communities Authority, Ministry of Housing and Utilities, P.O. 12573, Giza, Egypt
²Zoology Department, Faculty of Science, Al-Azher University.P.O. 11884, Nasr City Cairo, Egypt
³Animal Physiology Research, Desert Research Center, P.O. 11753, Cairo, Egypt
⁴National Research Centre, Water Pollution Research Department, El Buhous St., P.O. 12622, Dokki, Giza, Egypt
Abstract
Mechanical wastewater from dairy plants contains high concentrations of natural toxins that are harmful to the environment. Dairy plant pollution is characterized by high levels of natural substances, which represent a major source of chemical oxygen demand, biological oxygen demand, total suspended solids, and total organic carbon. Using spray-drying technology, this study formulated a novel strategy for extracting protein and nutrients from dairy plant sludge. A comparison was made between conventional organic processing and protein drying using animal feed by-products as an alternative to conventional proteins. The process of spray drying represents an established physicochemical methodology for the transformation of liquid-state solutions into fine powders, and droplets are heated with hot air, which leads to rapid water evaporation. Thus, the spray-drying method offers low waste with a conservative yield, resulting in the removal of contaminants in large mechanical filter units. The results showed that the treated effluent of the dry system complies with wastewater limits. The dry system effectively removes chemical oxygen demand, biological oxygen demand, total suspended solids, and total organic carbon. Furthermore, the dry milk powder was analyzed and evaluated, and it met international standard limits for buttermilk powder. Animals reuse the buttermilk powder due to its high protein content. The results of the analysis of the buttermilk powder showed the presence of protein, lactose, starch, fat, and moisture (34-37, 49.5-52, 0.6-8.6, 0.6-1.25, and 3.0-4.0%), each separately.
Keywords
dairy; wastewater; spray drying method; buttermilk; protein


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Minimize environmental impact of dairy production through improve the life cycle. Part 2: "Recovery of Proteins and Nutritional Components from Dairy Whey Waste via Spray Drying Technology"