Solid recovered fuels (SRF) are an innovative solution adopted by manufacturers to reduce their dependence on fossil fuels, while at the same time recovering the value of the waste they produce. A genuine energy alternative, both economical and ecological, SRFs are winning over more and more companies.
But how exactly do CSRs work, and what benefits can they bring to your industrial processes? In this article, we take you through their advantages, the technical challenges to be overcome, and the importance of rigorous quality control by analytical laboratories.
Understanding solid recovered fuels (SRF)
The energy transition is gradually becoming a priority for many industry professionals. In this context, solid recovered fuels (SRF) offer a credible alternative to fossil fuels. Their advantages go far beyond simply reducing carbon footprints, since they are part of a dynamic of waste-to-energy and energy-cost optimization. However, to exploit their full potential, it is essential to understand their nature, how they are produced and the issues involved in using them in industrial processes.
Definition and characteristics of CSR
Solid recovered fuels (SRF) are fuels produced from non-hazardous waste, such as plastics, paper, wood or textiles. This waste, initially destined for landfill or incineration, is then sorted, transformed and homogenized to create combustible materials with a high calorific value.
Unlike traditional fossil fuels, RDF is the result of a circular recovery process. They recover energy while reducing the amount of household or industrial waste processed by waste management systems. This circularity offers manufacturers a dual opportunity: to reduce their carbon footprint while limiting their dependence on fossil fuels, whose reserves are limited.
CSRs can be tailored to the specific needs of each industrial facility, depending on the composition of the available waste and the requirements of the combustion processes used in heating networks. By adjusting moisture content and particle size, it is possible to optimize the energy performance of SRFs in different boilers or industrial furnaces. CSRs are therefore a major strategic asset for industry professionals looking for more flexible and sustainable energy solutions.
CSR manufacturing processes and quality control
CSR production relies on a rigorous waste treatment process to ensure consistent, reliable fuel quality. The CSR manufacturing cycle begins with the collection and selective sorting of non-hazardous household waste. It is then crushed and dried to achieve the homogeneity required for combustion.
This transformation process includes several crucial quality control stages to ensure that SRF meets industrial specifications in terms of calorific value, moisture content and pollutant content (heavy metals, chlorine, etc.). It is essential for manufacturers to ensure that the solid recovered fuel used in their facilities complies with strict standards, to avoid any risk of equipment corrosion or pollutant emissions.
This is where specialized laboratories like CIRAM play a fundamental role. Thanks to their advanced analytical methods, the laboratories are able to accurately assess the chemical composition of SRFs, their energy potential and possible contaminants. They provide industry professionals with the advice and data they need to adjust their combustion processes and maximize efficiency while minimizing environmental risks.
CSR quality control is therefore not limited to guaranteeing sufficient calorific value, but also to ensuring that these fuels are adapted to the specific requirements of each industrial process. This includes particular attention to the technical and regulatory aspects governing their use.
Technical challenges of SRF for industry
Making efficient use of solid recovered fuels (SRF) involves overcoming major technical challenges associated with the variability of their composition for industry professionals. This heterogeneity can have a direct impact on the performance of their industrial processes, making laboratory testing essential to guarantee consistent, reliable quality.
Variability in RSC composition: a challenge for manufacturers
Solid recovered fuels, which are derived from the recovery of non-hazardous waste (plastics, textiles, paper or wood), are characterized by their highly heterogeneous composition. The proportions of organic and inorganic components, moisture levels and pollutant content can vary considerably depending on the waste source. This variability creates a major challenge for manufacturers seeking to guarantee efficient, stable combustion.
For manufacturers, the impact of this heterogeneity is manifold. Firstly, fluctuations in the calorific value of RDF can make it difficult to adjust combustion equipment, such as boilers or industrial furnaces. Uncontrolled variations can lead to a drop in energy yield, or untimely shutdowns due to overheating or insufficient combustion. Secondly, the unpredictable presence of impurities such as chlorine or heavy metals can cause material damage, particularly by increasing the risk of plant corrosion. If this phenomenon is not anticipated, it generates additional maintenance costs and shortens equipment life.
To achieve this, it is crucial to take these challenges into account upstream of the energy production process. CSR homogenization, although difficult to achieve on a large scale, can help reduce these performance gaps. In addition, it is essential to adapt combustion equipment control systems to respond to variations in composition. Some manufacturers also use filtration or pre-treatment technologies to minimize the impact of pollutants, but these solutions require initial investment and a high level of technical expertise.
Importance of laboratory testing to guarantee CSR quality
Given the variability in the composition of Solid Recovered Fuels (SRF), the role of analytical laboratories is becoming crucial in ensuring optimal exploitation from an industrial perspective. Rigorous tests enable us to assess the precise chemical composition of SRF, its energy capacity, and the presence of substances potentially hazardous to installations or the environment. This information is vital in order to adjust combustion equipment parameters in real time and ensure stable performance.
An essential aspect of RSC analysis concerns their biosourced content, i.e. the proportion of biomass present in the fuel. Biogenic carbon content, which measures the percentage of carbon originating from biological sources, is a key indicator for assessing the environmental impact of RDF. The radiocarbon method enables this percentage to be accurately determined. This analysis is essential for verifying compliance with regulatory and environmental requirements, particularly for manufacturers seeking to reduce their carbon footprint. Biomass content is often a decisive factor in certification processes and in the awarding of carbon credits.
Laboratory tests, carried out by CSR analysis laboratories such as CIRAM, include stable isotope and carbon14 analyses, in accordance with EN ISO 21644 (formerly EN 15440), which specifies methods for determining the composition of CSR. Analysis of the biobased component also plays a role in compliance with European and international regulations on sustainable development. By mastering these aspects, manufacturers can meet the growing requirements for reducing CO2 emissions.
Having an in-depth knowledge of the composition of SRF prior to its use is essential for industry professionals to better anticipate the necessary adjustments to combustion processes. This enables them to avoid possible fluctuations in performance and maximize plant efficiency, while limiting the risk of unplanned shutdowns or property damage.
On the other hand, these analyses guarantee compliance with current standards, particularly in terms of atmospheric emissions and management of combustion residues. For manufacturers, the penalties incurred in the event of non-compliance can be costly, both in financial terms and in terms of image. By integrating regular testing into their production processes, companies not only reduce the risk of incidents, but also increase the energy efficiency of their facilities, thereby optimizing their operating costs.
SRFs therefore represent a major opportunity for manufacturers seeking to improve their manufacturing processes, from reducing environmental impact to optimizing energy costs. But while these fuels promote energy circularity, they also present major technical challenges, with their variable composition and impact on equipment.
The use of analytical laboratories such as CIRAM is therefore not only limited to simple quality control through compositional analysis (biobased content), but also to regulatory compliance with current standards. By integrating solid recovered fuels into their energy strategy, manufacturers have the technical and scientific support they need to maximize the added value of these fuels while minimizing the associated risks. This includes rigorous management of biomass content and biogenic carbon, essential for aligning industrial processes with environmental and regulatory standards. If you would like to benefit from the expertise of a laboratory expert in SRF analysis, request a study of your samples from the CIRAM teams and obtain advice and quality analyses.
