Lindauer Dornier Gesellschaft Mbh

Lindauer Dornier Gesellschaft MIT Beschränkter Haftung

Karsten Resch

Andreas Rutz

Martin Veil

Richard Hehle

Wolfgang Klier

Dieter Wohlgenannt

Simone Tautenhahn

Herbert Mangold

In a method of drying a moist bulk material, such as sewage sludge, and treating the malodorous moisture-laden gas resulting from the drying process, the moisture-laden gas is introduced into waste water contained in a waste water clarifying basin of a waste water treatment plant. A system for carrying out the method includes a drying apparatus and at least one waste water basin of a waste water treatment plant, connected so that the moisture-laden gas emitted from the drying apparatus can be introduced, for example through an aerator, into the waste water. Thereby, the gas is cooled, demoisturized and deodorized, and moisture and volatile components are condensed and/or dissolved out of the gas into the waste water. The waste water is beneficially oxygenated, heated, and enriched with organic substances.

Method and apparatus for treating exhaust gases of thermal drying

Clogging and prolonged down times are avoided in a pelletizer for paste type materials such as sludge by providing an extruder hopper with at least one, preferably two, lower edge slide gates which can be opened to permit movement of a clogged screen zone out of alignment with the discharge opening of the hopper. The clogging material can be scraped off from the screen portion that is taken out of alignment with the hopper discharge opening. The cutting of the extruded sludge is accomplished by an oscillating lower screen section that slides back and forth below the upper screen section. The upper screen section is provided with two, preferably three zones, two of which are perforated and one of which is unperforated to form a closure for the hopper discharge opening. Screeding non-pelletizable material off the screen surface is accomplished either by a separate screeding device or by operating the slide gate or gates as screeds.

Apparatus for pelletizing dehydrated paste material, especially sludge

Growing community of inventors

Weissensberg, Germany

Karsten Resch