Author(s): Madhu K. Murali; Eleanor Mancusi-Ungaro; Aonghus Mcnabola
Linked Author(s): Madhu Krishna Murali, Aonghus McNabola
Keywords: No Keywords
Abstract: Coal is widely used for heating water in Zambian food processing and manufacturing. In certain industries, Wastewater Heat Recovery (WWHR) may be an option to reduce carbon emissions and coal use associated with water heating. Feasibility assessments at several food processing plants showed that there was significant embedded heat in dairy processing and boiler blowdown wastewater discharges. Additional longer-term monitoring showed a consistent thermal resource, particularly in boiler blowdown wastewater discharges and in wastewater from soybean oil extraction with mean temperatures between 40-95°C. The estimated energy savings across a number of discharge locations ranged from an equivalent reduction in coal use of 16 to 100 tonnes per year, around 24.2 to 150 tonnes of CO2 equivalent (tCO2e).
Year: 2024