Membrane filtration process has been introduced to many small water purification plants to fulfill the growing demands of cryptosporidium-free water, rationalized operation and maintenance, and dealing with polluted water source. Recently, introduction of membrane filtration process is to being considered by larger purification plants. For those cases, it is required not only small footprints or high water recovery, but also capability of on-site chemical cleaning of the process. Authors performed a demonstration experiment using pilot scale plant equipped with monolith ceramic MF membrane for put this process to practical use in larger plants. As a result, it was demonstrated that the plant has been operated stably under a flux of 4m/d, with periodical chemical cleaning about once in five month, and water recovery rate was 99.9%.