Dr. Sarkar's research focuses on the application of membrane in food, bioprocessing, and wastewater treatment. This entails carrying out experiments in the laboratory, understanding of underlying membrane fouling phenomena and modeling of flux decline behavior. Our study also involves in the optimization of process parameters, understanding of kinetics and mechanism during extraction of bioactive compounds from plant materials. Our recent study demonstrated that the aqueous extracts of jamun seeds and leaves were rich in polyphenol with antioxidant activities and the integrated membrane processes could be a potential tool for concentrating both the extracts with enhanced process throughput, product purity and storage stability. The flux decline behaviour during ultra- and nanofiltration was successfully explained by combined sequential model. Currently we are working on the application of biosurfactant for simultaneous removal of heavy metal ions and organic compounds from wastewater, with the aim of identification of membrane fouling mechanism, adsorption kinetics, adsorption isotherm, prediction of process throughput and process intensification.