The turbo filter serves to clean the cooling lubricants of machining processes (e.g. milling, turning, drilling). The modular system allows the filter to be used both decentrally in standalone machines as well as be installed in central plants. The filter works in accordance with the reverse flow principle and does not require any filter media. The sludge conveyor with integrated scraper conveyor, which serves as a sediment reservoir, discharge conveyor and fluid buffer, is especially suited for handling the concentrated reverse flow liquid. If required, a bath purification in the bypass flow expands (e.g. belt filter or centrifuge) the plant, in order to prevent a concentration of unsedimented fine particles.