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WATER &EFFLUENT TREATMENT


Subsequently,the container is transported away and stored temporarily.Using this new process, the quantity of sludge is reduced by approximately 50 %. When the three containers are full, they are loaded onto alorry and transported away.


Whilst the sludge was very lubricious before drying,itnow degenerates after drying by rubbing.“The dried filter cake can now be transported without difficulty in conveyor screws by the company that will carry out further treatment”, Etzel happily.“In addition, the drying brings a cost saving for further treatment.” This is because the dried and now lighter filter cake is calculated by weight for further processing to fertilizer.


Special solutions on the day’s agenda


The drying plants from Harter with their specially developed heat transfer system save two thirds of the energy in comparison to traditional procedures. Furthermore, they are easy to operate and are virtually


maintenance free. Control is fully automatic, regulated using electronic humidity mea- surement. That means, when the desired solid content is attained, the dryer switches itself off.In addition to small and medium sized models, special below ceiling designs, mobile tilt units or the paint sludge drying also belong to the spectrum offered by the dryer manufacturer.In close cooperation with the users, individual solutions are developed, for example, if architectural circumstances or special features in the technical process must be observed. As described in the application case, many large container plants have already been realized, up to batch sizes that are barely limited. In the in-house laboratory,drying tests can be carried out, in order to determine precise data for planning aplant.


Deciding Facts For Operators


Sludge from the industrial effluent treatment usually has awater ratio of


50 SURFACEWORLD april 2013


approximately 95 %– too much for further treatment or to dispose of cost effectively.


Sludge drying plants must operate efficiently and effectively.In many companies, additional structural circumstances or special specifications for the procedure must be observed.


Harter sludge drying plants dry the sludge so that the remaining water content is 20 to 5%.


They can be fully automatically controlled. With the assistance of electronic humidity measurement, the dryer switches off automatically as soon as the desired solid content is attained.


Contact: Mervyn P. Brown, Mobile: (+44) 783 463 34 60 Email: mail@haven-env.co.uk www.harter-gmbh.de


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