Waste and sludge treatment



SLUDGE TREATMENT INDUSTRY

 

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The sludge treatment industry arises from problems linked to the treatment of civil and industrial waste water. The use of abundant water generates a large quantity of waste water which requires special treatment to remove the harmful substances contained in it before it can be recycled back into nature.

Purification plants were developed to remove the harmful substances contained in waste water by means of active or activated sludge thereby generating semisolid waste called thickened sludge, which in turn must also be disposed of.

 

Over the years ongoing research and the use of new technologies have made it possible to dispose of and reuse waste material in many industries such as for example in biogas plants or to recycle it back into nature as fertiliser. Disposal plants, normally huge centralised plants, reduce the moisture content of the sludge through a process of thickening and densification in order to generate a dry material that is easier to store and use.

 

This industry is the ideal application for progressive cavity pumps because of the nature of the treatment sludge, which has a high percentage of solids content that increases during the various treatment stages, tends to plasticize and has adhesive properties.

Progressive cavity pumps perform best in the various stages involving the transfer of this matter as they ensure effective and reliable performance, which are of vital importance for a waste disposal plant, and higher output levels compared to other pumping systems.

 

 

WHY CHOOSE NOVA ROTORS?

Nova Rotors has been operating in the sludge treatment industry for years providing the best possible solutions, a wide range of products, services and expertise to find the most suitable configuration based on the customer’s specific requirements.

The various testimonials received from our customers both in Italy and from around the world over the years attest to the commitment of a dynamic company focussed on meeting the constantly growing market demands.

The pumps conceived and developed directly by Nova Rotors are designed specifically for the treatment of thickened and dewatered sludge with a high solids content of up to 40%, with low or high viscosity and that tend to plasticize, fluid or semi-fluid typical of sludge treatment plants.

The Nova Rotors progressive cavity pumps are developed scrupulously in compliance with the strictest hygiene standards to guarantee high standards of quality, reliability and durability, by providing the best solutions throughout all the plant’s storage and treatment stages. Special attention has been given to the development of the most appropriate construction and arrangement types based on use in order to optimise each and every transfer.

 

 

Diamond Series

DHB

This pump is typically used in the sludge-cake  treatment field with double bridge breaker shaft

 

 

 

 

 

 

FLOW CHART

schema-depurazione

 

Application (refer to the above diagram):

 

  1. DN: pump specifically designed for heavy-duty application, used for pumping from the thickened sludge storage tank to the various dewatering systems
  2. DHB: hopper pump with double bridge breaker shaft for transferring treated sludge to silos, tanks or vats
  3. DHS: pump used to transfer treated sludge from the centrifuge or screw press to silos, tanks or vats
  4. DHS: pump coupled directly to the silo for pumping treated sludge
  5. DHSB: DHS model pump fitted with “B??? module for transferring sludge from a silo to a dryer or incinerator which is the final stage, that is, the removal of residual moisture, in the sludge treatment plant illustrated above

 

 

 

Products for the sludge treatment industry


dnDN SERIES

Flanged industrial series ideal for heavy duty applications.

It is the best solution for the industrial sector for pumping a vast range of fluids; available with UNI, DIN and ANSI flanged and GAS BSP threaded connections.


 

DH SERIES

Standard model equipped with hopper and auger feed screw to move the product to the hydraulic part. Suitable for pumping materials with a low degree of flowability and prone to bridging.

 


 

dhsDHS SERIES

Model featuring a rectangular hopper, with joint protection sleeve and enlarged auger feed screw to move the product to the hydraulic part. Suitable for pumping high viscosity materials with low flowability and up to 28% solids content not prone to bridging.

 


 

dhb

 

DHB SERIES

Model featuring a hopper with double bridge breaker shaft, joint protective sleeve and enlarged auger feed screw to move the product to the hydraulic part. Suitable for pumping highly viscous, non-flowing materials with up to 35% solids content prone to bridging or in blocks.

 


 

dhsbDHSB SERIES (DHS with “B” MODULE)

This model features a rectangular hopper, joint protection sleeve and an enlarged auger feed screw to move the product to the hydraulic part. A “B??? Module is installed on the hopper which feeds the screw by means of a wheel device to prevent bridging. Suitable for pumping non-flowing materials with up to 40% solids content prone to bridging and plasticizing.

 

 


 

dv-longDV SERIES

Vertical Series developed for pumping from tanks and wells immersed directly in the product to be pumped. The length can be adapted to suit the installation requirements. The stainless steel version (AISI 304 or AISI 316) is supplied with a stator jacket as standard to prevent corrosion of the stator. Two standard configuraions are available: the short version and the long version with split casing and bottom mounted guiding cone.

 

 

 

APPLICATIONS


 

i_5f4f0ee62b08b914_html_3943c1d3DHS pump

Hopper pump DHS series used after filter press for the recycling of the dried sludge into a collector tank.

 

 

 

 

 

 


i_5f4f0ee62b08b914_html_9e44e54DN pump

DN series used for sludge transfer in a waste water treatment plant.

 

 

 

 

 

 


 

i_5f4f0ee62b08b914_html_56204925DN pump

DN series used for chemical thickened sludge transfer to the centrifuge.

 

 

 

 

 

 


i_5f4f0ee62b08b914_html_f4198904DN pump

DN series used for transfer of polymer and sludge in a waste water treatment plant.

 

 

 

 

 

 

 

 



dn-din DN SERIES
Flanged industrial series ideal for heavy duty applications. It is the best solution for the industrial sector for pumping a vast range of fluids; available with UNI, DIN and ANSI flanged and GAS BSP threaded connections.

 


dh

DH SERIES
Standard model equipped with hopper and auger feed screw to move the product to the hydraulic part. Suitable for pumping materials with a low degree of flowability and prone to bridging.


dhe-garolla

 

 

DHE SERIES
Model with a large eccentric hopper and integrated trolley, ideal in the winemaking industry for pumping crushed grapes with or without the stems. Standard AISI 304 stainless steel construction for all components.

 

 


dhp-din

 

DHP SERIES
Model with enlarged hopper and auger feed screw to move the product to the hydraulic part, ideal for pumping materials with a low degree of flowability and prone to bridging. Standard AISI 304 or AISI 316 stainless steel construction.

 


dxoDXO SERIES
The DXO series is the hygienic pump with open joint. The design of its casing and rotating parts that are completely free of standing water and dead zones makes it the absolute best sanitizing solution.

 


dxcDXC SERIES
The DXC series is a hygienic pump with standard DN series joint. It is the solution that combines excellent sanitizing characteristics thanks to the design of its casing that is completely free of standing water and dead zones, with the top performing patented pin joint of the Diamond series.

 

 


rl

 

RL SERIES
The RL series is an extremely compact product thanks to the integrated pump-electric motor construction. The patented pin joint of the Diamond series ensures high reliability.

 


r

 

R SERIES
The R series is the most compact product available due to the elimination of the block between the pump and the drive. It uses a cross joint, is reliable and easy to maintain.