SCRAPERBOX - Device and method for thickening sludge

  • From France
  • Responsive
  • Patents for licensing

Summary of the technology

Scraper Box is a simple, efficient and low cost innovative technology for thickening liquid sludge. It can be automated and does not require conditioning polymer.


Details of the Technology Offer

Reducing the volume of sludge from waste water treatment plants is a key parameter for handling and conveying... improving techniques and optimizing costs are crucial (storing sludge thickened by gravity makes up 40% of the total cost of the spreading sector).

Scraper Box is a simple, efficient and low cost innovative technology for thickening liquid sludge. It can be automated and does not require conditioning polymer.

It produces sludge that is 60% more concentrated than with usual thickeners: sludge dryness is increased significantly, achieving 50g/L compared to the current 30g/L, without the use of costly coagulants.

For example: a city with a daily production of 20m3 of sludge at 30g/L would only produce 12m3 at 50g/L with Scraper Box.
Our innovative thickener is particularly adapted to the needs of rural and peri-urban cities with small waste water treatment plants (<2000 inhabitant). It is mobile, robust and simple to maintain while its tactile interface makes it easy to use.

The device includes a tank (inlet: raw sludge; outlet: thickened sludge) with an internal filter to separate two sections. Raw sludge is added into the lower section. It is then thickened over 2 stages: Settling followed by Filtration/Compression. The settling phase occurs until the sludge cake reaches the filter located in the upper part of the tank.

The thickened sludge is removed separately from the liquid contained in the upper section. A second tank allows a continuous thickening while the first one is emptying.

Current development status

Commercially available technologies


- Processing waste water: thickening sludge from waste water treatment plants - Particularly adapted to small plants treating urban or rural industrial waste water (<2000 IE)

Desired business relationship

Patent licensing

Intellectual property status

  • Granted Patent
  • Patent application number :PCT/FR2014/052548

Attached documents

Related Keywords

  • Industrial Technologies
  • Mining Technologies
  • Agriculture and Marine Resources
  • Protecting Man and Environment
  • Waste Management
  • Municipal Water Treatment
  • Water Resources Management
  • Social and Economics concerns
  • Consumer related
  • Industrial Products
  • Water treatment equipment and waste disposal systems
  • Other
  • Construction and Building Products
  • Water, sewerage, chemical and solid waste treatment plants
  • Other (uncategorised)


The "Valorisation Sud" Consortium (CVT) is an inter-institutional organisation certified within the framework of investments for the future. With a ten-year endowment of €9 million, the CVT Valorisation Sud is the national reference organisation for transfers of technology and know-how adapted to tropical and equatorial regions and the Global South.

Our aim

To boost transfers of technologies and know-how adapted to the Global South (tropical and equatorial regions, developing and emerging countries) to the economic world.

Our mission

To promote and transfer technologies of socioeconomic interest developed by French public research laboratories to markets in the Global South.

What we do

Our team of business managers offers a service tailored to your needs:

+ Assistance with intellectual property management;
+ Creation of a technologies portfolio with a promotion and transfer mission;
+ Marketing and promotion of technologies in markets in the Global South;
+ Pre-industrial maturation, project management, licensing agreements;
+ Establishment of innovating companies.


Never miss an update from CVT VALORISATION SUD

Create your free account to connect with CVT VALORISATION SUD and thousands of other innovative organizations and professionals worldwide


Send a request for information

About Technology Offers

Technology Offers on Innoget are directly posted
and managed by its members as well as evaluation of requests for information. Innoget is the trusted open innovation and science network aimed at directly connect industry needs with professionals online.


Need help requesting additional information or have questions regarding this Technology Offer?
Contact Innoget support