Recovery of sludge from wastewater treatment and the aggregates extraction process to obtain lightweight aggregates

The LIFE SLUDGE4AGGREGATES project seeks the industrial recovery of WWTP sludge and sludge from the natural aggregates extraction process. The innovative aspect of this project revolves around the manufacture of artificial lightweight aggregates (ALA) using 100% of the recovered sludge as raw material.

Project objectives
The main objective of the project is to demonstrate that artificial lightweight aggregates (*) can be obtained from the mix of WWTP sludge and sludge from the natural aggregates extraction process for application in construction/infrastructure and gardening/ horticulture.
The specific objectives of the project are as follows:
• To develop an alternative sludge management process that facilitates recovery, in accordance with European Commission environmental policies (Directive 2008/98/EC. Article 4.1.b).
• To design and construct a pilot plant for the manufacture of artificial lightweight aggregates.
• To establish the technological and environmental parameters necessary for the new products, in accordance with applicable Spanish and European legislation.
• To validate project results technologically and environmentally, through lifecycle analysis of the products obtained and their use in the applications envisaged within the framework of the project.
• To promote the use of the artificial lightweight aggregates produced as a result of sludge recovery.
(*) Light aggregates are natural or artificial products with a density of less than 1200 kg/m 3 , which are used in multiple applications: to obtain lightweight construction elements and/or insulating materials, gardening/horticulture etc.
Project actions
The project comprises 11 main tasks or actions. One of these is a preparatory action; two are associated with the monitoring of technical, environmental and socioeconomic indicators; one is related to dissemination and communication; one relates to management and coordination, and the six remaining actions are associated with technical areas.

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D. Agripino Pérez Lorenzo y | and Dña. María Dolores Corvinos Aguarón.
JAP Energéticas Medioambientales
D. Antonio Romero Casado. Instituto Tecnológico de Rocas Ornamentales y
Materiales de la Construcción (INTROMAC)
D. Jacinto Alonso Azcárate
Universidad de Castilla-La Mancha (UCLM)
Dña. María Fernández Torío. Arcillas Refractarias, SA (ARCIRESA)
D. Carlos Alberto Muro Plaza
Ayuntamiento de Cáceres | Cáceres City Council

Article published in: FuturENVIRO #33 September 2016