Real-time measurement of particles sedimentary layer in the centrifuge with WERD

Abstract

Centrifuges have important part in solid-liquid separation process of sewage plant to reduce slurry. Measuring solid-liquid separation phenomena in centrifuge is required to obtain more effective separation and save energy. However, the measurement device that measures solid-liquid separation phenomena in centrifuges has not existed yet, because centrifuges rotate at high speed. Therefore, in this study the measurement device with wireless communication function for centrifuges has developed. The measurement device is composed of constant current circuit, voltage measurement circuit, wireless communication device and electrodes. The measurement device measures solid-liquid separation phenomena(particle sedimentation thickness) by measuring electrical resistance between electrodes. Experiments carried out attaching the measurement device on centrifuges. The changes of particle sedimentation thickness were measured changing elapsed time and feed rate. Particle sedimentation thickness increased with the passage of time and increases of feed rate.