Turning Waste into Energy: The Promise of Alternative Engineered Fuel (AEFs)

Our planet faces significant environmental challenges, and innovation is key to addressing these issues. As companies face higher scrutiny regarding their sustainability practices, innovation in recycling and waste management becomes crucial, especially for those producing hard-to-recycle materials during the manufacturing process.

Creative thinking, new production methods, and advanced recycling approaches are essential for moving forward sustainably. One of the most exciting developments in this realm is Alternative Engineered Fuel (AEFs), which offers a transformative solution for managing waste and energy.

What Are Alternative Engineered Fuels?

AEFs are innovative fuels created from industrial byproducts and post-consumer waste that are too complex for traditional recycling. Unlike fossil fuels like coal and natural gas, AEFs are derived from a mix of materials such as paper, plastics, , resins, and rubber. These components are processed into a solid fuel, providing an efficient alternative to conventional energy sources.

Industrial Applications of AEFs

AEFs are primarily utilized in cement, lime kilns, and coal burning boilers, replacing traditional fossil fuels and reducing environmental impact. This shift not only cuts greenhouse gas emissions but also redirects substantial waste from landfills. Cement and lime kilns using AEFs can currently replace 10% to 20% of their fuel, with some achieving up to 30%.. Since 1975, the U.S. cement industry has reduced its carbon dioxide emissions by 33% and its energy consumption by as much as 37%.

The adoption of AEFs is expected to grow, potentially exceeding 50% in many of the coal burning kilns. The University of Iowa relies on steam to supply heat throughout its campus and generate some of its power. To produce steam, the university uses several types of boilers. One of these was originally coal-fired, but In 2017, in support of its goal of becoming coal-free by 2025, the university transitioned to burning 100% AEF. This solid fuel is made of pre-consumer paper and plastic industrial waste; not only eliminates the boiler’s use of coal as a fuel, but also reduces the amount of plastic going to landfills.

To understand how AEFs are processed, watch this video from SSI Shredding Systems.

Advantages of Using AEFs

AEFs offer numerous benefits, both environmentally and financially:

1. Environmental Benefits: AEFs burn cleaner than coal, emitting lower levels of CO2, sulfur, and nitrogen oxides. Some AEFs may even be carbon-neutral or carbon-negative, given the methane emissions avoided by diverting waste from landfills.
2. Cost Savings: Converting waste into AEFs can create new revenue streams and reduce the rising costs associated with landfill disposal. Additionally, using AEFs helps companies avoid fines and compliance issues linked to traditional waste management.
3. ESG and Brand Enhancement: Actively pursuing environmental, social, and governance (ESG) goals boosts brand reputation, leading to sales growth, investment opportunities, and attracting valuable partnerships and talent. For industries like cement and lime production, AEFs offer a cost-effective and efficient fuel alternative that also meets regulatory standards.

iSustain's Role in Providing AEFs

iSustain plays a pivotal role in the development and supply of AEFs. By qualifying, blending, and providing alternative fuels, iSustain supports companies in their sustainability efforts. An excellent example of this is our supply relationship with Lafarge Cement Company, a leader in sustainable cement production.

Lafarge has implemented a lower carbon fuel (LCF) system at their Richmond, British Columbia, plant, replacing up to 50% of their fossil fuel consumption with LCF, which includes construction waste, wood, and non-recyclable plastics. iSustain supplies these alternative fuels, aiding Lafarge in minimizing greenhouse gas emissions and diverting 100,000 tons of waste from landfills annually. To learn more about this collaboration, visit our blog on Lafarge's sustainable practices.

A Sustainable Solution for All

Alternative engineered fuels provide a dual benefit for both the environment and businesses. They not only reduce landfill waste and greenhouse gas emissions but also help companies capitalize on otherwise unusable materials. By meeting ESG objectives, mitigating risks, and generating new revenue, AEFs represent a forward-thinking, sustainable solution.

Looking Ahead with iSustain

At iSustain, we're always exploring new ways to enhance sustainability and reduce waste costs for our clients. We are excited to see the ongoing advancements in research and technology surrounding AEFs and look forward to their increasing impact on various industries. By staying at the forefront of these developments, we continue to help our clients achieve their sustainability goals and drive positive change for the environment.