Ancillary Equipment

DEWA offers a wide range of ancillary equipment for sludge thickening and dewatering including polymer preparation and dosing systems, flocculation systems, conveyors, MCC, SCADA, etc.

Cavitations technology

The recent merger between DEWACO LTD and Cavia Technology of Finland, a company specialised in ultrasonic treatment systems enables DEWACO LTD to include “cavitations technology” to its portfolio to consolidate in this competitive high-potential sector. Disruption of sludge cells by means of DEWACO LTD “high frequency” ultrasonic cavitations treatment enables the release of light organic substances into the sludge water thereby exposing them for further anaerobic digestion. In practical terms, a certain portion of the biological sludge will be treated using DEWACO LTD ultrasonic cavitations treatment prior to digestion. This process encourages the exploitation of valuable materials and energy from stabilised sewage sludge just before its final disposal. In addition, DEWACO LTD ultrasonic treatment can be utilised to improve dewatering efficiencies of biological sludge.

Mobile dewatering Plants

The DEWA mobile sludge dewatering unit is a complete system that can be mounted on a trailer. It really is the ultimate “plug and play” system. The fully enclosed system creates an operator friendly environment with minimum risk of contact with sludge cake or vapours. Unit volumes are available from 1m3/hr to 30m3/hr. Our equipment, systems and services are dedicated to assisting customers in optimizing the performance of their processes. Our representative works closely with customers in almost 30 countries to help them stay ahead.

Sludge Removal (Chain & Flight type Sludge Collectors for rectangular clarifiers)

There have been tremendous progresses in the Sludge Collector Market and the popularity of the rectangular clarifier is rapidly increasing around the globe. Rectangular Clarifier provides a friendly layout option with minimum dead space between the units as these units can be placed on the common wall. In addition, they can be built one on top of the other (in 2 – 3 layers). Circular tanks require careful design of the inlet stilling well (inlet buffer) to achieve a stable radial flow pattern without causing excessive turbulence in the vicinity of the central sludge hopper. The removal efficiency of the chain and flight type collector mechanism is much higher than the any of the bridge type. This is due to the large numbers of the flights. Moreover, power consumption and maintenance costs are rather minimal. These mechanisms can be provided with non-metallic components including Collector Chain, Head and Idler shaft Sprockets and Scrappers which not only ensure easier erection due to light weight but also long life. These Scrappers are driven through the collector chains on both ends of the tank and in-turn carried on the sprocket mounted on the solid stainless steel shafts running across the tank width and supported on the tank walls. Today, there are over 1000 of DEWA sludge and scum removal systems in operation throughout the world. Thanks to our professional partners who appreciate quality & reliable products rather than cheap ineffective systems. Your advantages at a glance: DEWA L-K 160 sludge collector chain exhibits the least amount of elongation and the life span of DEWA collector is an extremely significant DEWA c-channel flights have high Modulus of Elasticity, which gives the least amount of deflection. DEAW c-channel Flights do not recalculate solids into the effluent. Provide superb strength characteristics for extreme sludge loading applications Draining not required for the tensioning of the collector chain. Energy efficient, operator friendly and long lasting Applicable for any type of rectangular clarifier DEWA systems are designed to operate in the clarifiers up to 100m long and 12m width, as well as DAF and API tank systems. System components: Collector Chain Scraper flights, stiffeners and attachments Head shaft sprockets Idler sprockets Shafts and collars Bearing assembly Wear Shoes (Carry and Return Wear Shoes) Rails Collector chain tensioning device Electrical components Drive and driven sprockets, drive chain Scum canoe System controls

Sludge Thickening & dewatering

During the process of water & wastewater treatment, sludge generation is an important and at times crucial issue to be addressed as inadequate sludge handling system can pose serious environmental implications. Liquid sludge can be easily thickened and reduced to a solid cake via sludge thickening / dewatering. This reduces the volume of liquid sludge significantly, usually resulting in a quite substantial net saving in sludge disposal costs. Different technologies are required as the properties of the liquid sludge vary from municipalities to industries. The sludge’s can be organic or inorganic as a consequence of treatment process and each of this sludge variety needs specific handling before it is fit for disposal as a client's requirement which sometimes is dictated by the environmental issues in their respective areas. As sludge treatment specialist DEWACO LTD has developed various concepts for different sludge thickening / dewatering applications. With over 1000 installations, DEWA offers a full range of thickening and dewatering equipment that provides superior performance, mechanical reliability, and long-life durability, and user friendly features. Current trends clearly illustrate that the demand for mechanical dewatering equipment are in upbeat. More and more consultants and experts are specifying gravity belt thickeners and belt filter presses rather than other dewatering equipment due to excellent performance and competitiveness. As a well experienced company in the field of sludge treatment DWT is always focusing to become forerunner in this field.