A Novel Approach to Sludge Treatment Using Microwave Technology

Thermal drying approaches can reduce sludge transportation costs by reducing the sludge volume. This thesis describes the application of a novel microwave-based pilot-scale unit for the sanitization and drying of sludge from municipal wastewater treatment plants and on-site sanitation facilities. Microwave technology offers faster processing times, improved drying rates, and a reduced physical footprint. When coupled with mechanical dewatering techniques and membrane separation technology, it can increase the reliability of sludge treatment while recovering valuable resources through agricultural or thermochemical applications.

Format: Paperback / softback
Length: 170 pages
Publication date: 01 March 2022
Publisher: Taylor & Francis Ltd

Sludge transportation costs can constitute a substantial portion of the expenses incurred in municipal and faecal sludge management. These costs can be mitigated by employing thermal drying techniques to reduce sludge volume. This thesis explores the application of a novel microwave-based pilot-scale unit as an alternative technology for sanitizing and drying sludge from municipal wastewater treatment plants and on-site sanitation facilities. The potential economic advantages of volumetric heating, moisture levelling, and enhanced liquid and vapour migration from the interior to the surface of the product drive the growing interest in microwave technology in sludge treatment processes.

According to the findings of this study, these factors result in faster processing times, improved drying rates, and a reduced physical footprint. Furthermore, microwave technology operates as a standalone treatment unit. When combined with mechanical dewatering techniques and membrane separation technology, it can enhance the reliability of the technology employed in sludge treatment while recovering valuable resources through agricultural or thermochemical applications such as (co-) combustion.

The results of this work substantiate the strong feasibility of incorporating microwave-based technology within environmental protection and public health initiatives.

ISBN-13: 9781032217994