Waste Water Treatment
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PROCESS WATER CLEANING TECHNOLOGY TROWAL PROCESS WATER CLEANING TECHNOLOGY for surface finishing applications

Process water – a significant cost factor MASS FINISHING NEEDS PROCESS WATER Water and cleaning compounds are two indispensable ingredients for nearly all “TROWALIZING” processes. Media and metal fines as well as oil and grease from the surface of the treated work pieces are accumulating in the process water. For this reason, the process water must be cleaned. Whenever the process water goes to drain, the legal standards for the cleaning process (e.g. flocculation) are quite stringent. For recycling of the process water the cleaning requirements are not quite as strict.The multiple use of...

Trowalpur flocculation – the classical waste water treatment system CRISTAL CLEAR WATER Any contaminated mass finishing process water, even if it is acidic or a lkaline, can be transformed into clean water that qualifies to be discharged to drain. SIMPLE ADDITION OF POWDER FLOCCULANT Daily process water batches of = 3,000 liter (790 gal) can be cleaned in an easy to operate low cost RT batch flocculation system. At the end of the workday a p owder flocculant is sprinkled into the collected wastewater while being agitated with an electric stirrer. After a short time the formed flocks sink to...

CENTRIFUGAL FILTERING – THE SOFT CLEANING TECHNOLOGY In centrifuges the solids are separated from the liquid phase with a centrifugal force of up to 2,417 G. Oil and / or media and metal fines = 1.0 μm can be separated by the addition of flocculants. The cleaning compound is not affected and remains in the process water to be re-used! BASKET CENTRIFUGES, MODEL RANGE ZM Cleaned process water Dirty process water The models ZM 03-ECO 1 and ZM 03-FL are characterized by their sturdy design and ease of operation. The sludge basket is removed and emptied manually. It has a capacity of 14 liters...

AUTOMATIC PEELING CENTRIFUGES, MODEL RANGE ZA The fully automatic, PLC controlled models ZA 04 and ZA 06 can clean up to 2,000 liters/h of contaminated process water from mass finishing operations. In preset time cycles the sludge deposited on the inner wall of the rotary drum is automatically peeled out and dumped into a sludge container located below the drum. The modular design of the ZA model range offers multiple machine configurations allowing the ideal adaptation of the equipment to the specific customer requirements. These o ptions include different dirty water and process water...

Operational recommendations for everyday applications RECYCLING WITH CENTRIFUGES For mass finishing processes with recycling we recommend the following trowal compounds and trowalpur flocculants: Application involving ferrous metals non-ferrous metals trowal compound trowalpur flocculant* Much oil & few solid fines Much oil & many solid fines Little emulsified oil & many solid fines (plastic or metal) Little emulsified oil & few solid fines (or only ceramic media) * Flocculants are mainly used in combination with hot air drying of the finished parts and/or high oil quantities on the surface...

TROWAL CENTRIFUGES CAN BE USED FOR MANY INDUSTRIAL LIQUIDS! Whenever solids in the process liquid negatively influence a manufacturing process, trowal centrifuges offer the solution: • Removal of paint sludge from the recycling water in paint booths • Phosphating liquids • Coolants used for treating metal/ceramic/stones/glass. • Removal of undersize media in wet blast operations • Removal of solids from industrial cleaning liquids • Cleaning of oil Process water prior to cleaning Customer service TROWAL OFFERS A COMPREHENSIVE SERVICE PROGRAM Services like professional consultation, the...

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