ROTAMAT® Screw Press RoS 3Q - Tratamiento de Aguas

WASTE WATER SolutionsROTAMAT® Screw Press RoS 3QCost-effective sludge dewateringfor independence in sludge disposal

➤ The situation and potentialsof sewage sludge dewateringDue to the declining acceptance of sewage sludgespreading on agricultural land the cheapest disposaloption is disappearing. Advanced sewage sludgetreatment, such as disinfection, drying or incineration,requires particularly efficient upstream mechanicalsludge dewatering units:➤ Increased solids concentrations to minimizetransport and utilisation costs➤ Increased plant availability to avoid unplannedmachine down time➤ Flexible adaption to varying sludge propertiesto secure sludge utilisation➤ Reduced operating costs➤ Screw Press RoS 3Q featuresThe conditioned sewage sludge is pumped into thecompaction chamber inside the cylindrical sieve of theROTAMAT® Screw Press RoS 3Q. A screw shaft slowlyrotates inside the compaction chamber and continuouslyconveys the sludge through the chamber to the presszone with pneumatic counter-pressure cone at the upperend of the chamber where the sludge is pushed by theconveying screw past the pressure cone into thedischarge chamber. Due to the conical shape of the screwshaft and decreasing pitch of the screw flights the volumeof material between the flights is reduced and the sludgepressed against the inner screen surface so that thesludge is dewatered and the water pressed out throughthe sieve. The pressing force is adjustable via the positionand counterpressure of the pressure cone. The outersurface of the screen drum is washed periodically whilethe inner screen surface is cleaned by brushes fitted onthe screw flights.UgUeUaUb UcUdUfa Screw shaft drive with 0.2 - 1.5 rpmb Pressure feeding of sludgec Filtrate outletd Conically shaped screw conveyor with decreasing pitch for optimal compactione Cylindrical filtration unit with a 1.0 to 0.05 mm screenf Press cakeg Infinitely variable pressure cone

WASTE WATER Solutions➤ The benefits of theROTAMAT® Screw Press RoS 3QHigh dry substance contents of the press cakeare achieved through:➤ Defined volume reduction by the conveying andcompacting screw➤ Pressure cone for infinitely variable dewateringpressure➤ High driving torque for pressure build-up➤ Permanent cleaning of the inner screen surface➤ Minimum filter cake thicknessOutstanding plant availability is ensured by:➤ Virtually wear-free operation due to the slow screwspeed of < 1.5 rpm➤ Only few moving parts➤ Sturdy stainless steel design➤ Easy access through large inspection openings➤ Simple electrical control technology➤ Optional unattended round-the-clock operationMobile unit mounted on a trailerMinimized operating costs due to:➤ Outstanding energy efficiency➤ Specific power consumption < 0.01 kW/kgDR➤ Minimum operator attendance requirements of lessthan 20 minutes a day➤ Minimum costs for wear parts➤ Low wash water demand of below 8 % of the sludgethroughput➤ Low filtrate return load➤ High separation degree, normally > 97 %Sturdy stainless steel filtration unitLow total investment costs due to:➤ Compact, space-saving design➤ Simple electrical control technology➤ Integrated machine feet➤ Vibration-free, virtually noiseless operation➤ Encapsulated, odour-free plantStationary unit dewatering 140 kgDR/h

WASTE WATER Solutions➤ Special applications of theROTAMAT® Screw Press RoS 3QDewatering of thin sludge:As the ROTAMAT® Screw Press RoS 3Q is pressure fed andtherefore can separate huge amounts of water in the predewateringzone, it permits direct dewatering of thinsludge with solids contents below 1 %.Benefits:➤ Sludge dewatering without the need for precedingthickening➤ Typical dry substance of press cake: 18 – 24 %➤ Sludge volume reduction > 97 % in one singletreatment step➤ Saves investment and operating cost for sludgethickening➤ Minimum operator attendance for sludge treatmentMobile RoS 3Q 440 unit for contract dewateringVarying sludge propertiesfrequently have an adverse affect on sludge dewateringefficiency and lead to increased operator attendancebeing required.The ROTAMAT® Screw Press RoS 3Q automaticallyidentifies overloads or underloads and a control circuitautomatically ensures the optimal operating point ismaintained.Screw press for unattended round-the-clock operationBenefits:➤ Constant performance➤ Reliable operation➤ Minimum operator attendance requiredAvailable RoS 3Q sizesSizeThroughput capacity[kgDR/h]Drive capacity[kW]280 70 0.37440 140 1.5800 500 4.0Complete RoS 3Q 280 installation on 12 m 2Aguas Latinas México S. de R.L. de C.V.Insurgentes Sur 662, Desp. 603Col. Del Valle, Del. Benito Juárez03100, México, D.F.Subject to technical modification1,5 / 3 – 8.2010 – 4.2005ROTAMAT® Screw Press RoS 3Q