Washers - Import export

Application Standard grit trap contents have an organic proportion of 50 to 80 %. Conventional sand washers are able to dewater the grit trap settlings only partially. But, the high organic content and the lack of dry substance bring on unpleasant odour, high weight and, as a consequence, high costs for disposal. With the PWL Sand Washer the organics in the grit trap can be nearly completely washed out. This results into a reduction of mass of up to 80 % and might cause cost savings of up to 90 % when being disposed on a construction waste landfill. This procedure can be applied in industry, as well, to separate valuable materials from waste. Due to the separate discharge of the various fractions they can be further treated, recycled or disposed. Thus, valuable materials can be returned to the production process and waste material be disposed at low costs and correctly sorted. Function The PWL Sand Washer is fed with a sand-water-mixture. The settled sediment mixture is conveyed...

Application An extensive reduction of the screenings volume by returning organic ingredients into the clarification process offers besides important cost saving with regard to screenings disposal advantages for the process stability of nitrification/ denitrification necessary in nearly all clarification plants. The company ABZ in Austria implemented decades of experience in the field of screenings treatment on the screenings washers. Many references attest the leading position of this technology by which the screenings weight can be reduced on average by 75 %. Special attention has been turned to the development of least possible wear and utmost operational safety. The Interval-Wash-Compactor can be operated with service water from the sand trap area. Peak loads of screenings due to storm water events are handled without problem, as well. Function The screenings are discharged directly or via a conveyor from the screen into the infeed hopper of the washer. After a pre-compaction...