Objective
The project will facilitate the application of a fluidized-bed drier for the drying of excess sludge from a process water purification plant. The water removed from the drier is returned into the purification plant of the mill and the wet sludge is dried into a percentage of dry matter. This procedure provides a substantial relief for dumping sites. The resultive granulate, which can be stored for an unlimited time can be used as a heating equivalent of brown coal and is thus quite valuable. Accordingly, the fluidized-bed steam drying procedure offers the possibilities of both volume reduction of sewage sludge by means of drying and the creation of energy through the granulate.
In the water purification plant of the company Mayr-Mainhof, the excess sewage water is purified using a 2-stage anaerobic/arerobic technique. The resulting sludge that amounts to 50 tons per day may be dried by conventional twin-wire presses to obtain a maximum of 30% dry matter content. By using the fluidized-bed drier, which is to be operated with steam from the bio-gas boiler, the dry matter content of the sludge may be raised to as much as 95% in a closed steam circuit. Using the drying system of Mayr-Melnhof, no emissions result. The closed system also prevents dust development during the process. The accruing water steam is condensed is returned to the biological sewage water purification plant. The use of waste paper in the surface layer of the carton is a further innovative solution. Furthermore using a tuyère bottom for the drier has been of particular importance within the scope of the project, because the efficiency of the drying process depends on it. The drying of the sludge itself is effected by a combination of contact and convection drying. At around 120°C, the excess water is extracted from the wet sludge in a gentle manner.
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Programme(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
8130 Frohnleiten
Austria
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.