Patent ID: 8070948

Claim:
A sewage treatment plant comprising: at least one activation tank for wastewater and/or at least one secondary clarification tank for wastewater, the activation tank and/or the secondary clarification tank being charged with shaped bodies freely suspended in the wastewater, and at least one filtration appliance for wastewater purification comprising membrane plates arranged essentially in parallel to one another, wherein the membrane plates are made of a porous ceramic and have a thickness between 0.15 mm and 20 mm, wherein the shaped bodies are plastic shaped bodies and have a space diagonal of between 0.1 cm and 10 cm, the membrane plates arranged essentially in parallel to one another are submerged at least in part in the at least one activation tank and/or in the at least one secondary clarification tank such that a surface of at least two membrane plates can immediately contact the shaped bodies floating in the tanks, and the membrane plates comprise at least one separation layer which consists at least in part of nanoscale particles and which has pores having a diameter between 1 nm and 1400 nm.