Filtration appliance for sewage treatment using ceramic-based membrane

The invention relates to a filtration device for effluent purification, preferably for a sewage treatment plant, in particular, for a small sewage treatment plant, comprising at least one ceramic-based membrane for separation of microorganisms, a sewage plant with such a filtration device, a method for purification of effluent, in particular in a sewage plant, wherein microorganisms in the effluent are separated by means of at least one ceramic-based membrane and the use of a ceramic based membrane as filter for separation of microorganisms and optionally fine solids from effluents.