Design and Development of Dewatering Screw Press

Abstract

With time, dewatering waste has always been a very crucial step in waste management. Several techniques have been developed and are still being developed for efficient dewatering of sludge. Dewatering of sludge is important in several aspects to dispose or reuse the sludge. Sludge management not only creates potential savings of economic resources but is also destined for public health, especially to treat waterborne diseases and also reduction of chemical use of fertilizer for crop production. Public and private sectors need to dispose of sludge in a manner that is approved by regulatory agencies. It is usually found that the sludge is just air dried, disposed of or discharged without any treatment, which is harmful to the human body, plant, air and soil. The growing demand in both urban and rural areas for sustainable waste management system was identified as a motivation for the design of a compact screw press dewatering system. The concept involves the principle of compression and filtration in different stages to attain the maximum efficiency of dewatered sludge as the output. To support the concept, we have used three-dimensional modelling and FEA analysis to support our mathematical calculations. We aim to derive a concept of dewatering screw press for solid–liquid separation of cow dung. Cow dung is the bulk material that we have referred to depict the concept of sludge dewatering for its abundance availably and the vast significance of its uses in various industries.