Waste Management

As communities grow, landfill space runs short and disposal costs rise. WES engineers waste-management solutions that cut reliance on landfills while recovering value from what would otherwise be discarded. The systems we evaluate can accept a wide range of caloric feedstocks:

• Biomass and agricultural residuals
• Municipal Solid Waste (MSW)
• Industrial waste, such as tires
• Certain hazardous and specialty streams (subject to permitting)
• Refuse Derived Fuel (RDF)

Where it fits, a waste-to-energy approach can reduce the volume of waste substantially while improving sanitation and lowering the risk of contamination and disease.

Gasification

Gasification is the process of converting carbonaceous materials — such as coal, petroleum, biomass and waste — into combustible gases (carbon monoxide and hydrogen) that ideally retain most of the energy present in the original feedstock. In practice, energy-conversion efficiencies are typically reported in the range of 70–90%, depending on the feedstock and the plant configuration.

It is achieved by thermally degrading organic materials in the absence of the air needed to support full combustion. Gasification is not a new subject: it was widely employed during the Second World War to operate vehicles and generators across Europe. Today it offers a clean route to dispose of organic waste while deriving commercial benefit from its energy content.

Where gasification fits a project, WES engineers it to convert calorific waste into a combustible syngas, a solid residue and usable energy products, with careful attention to environmental impact. WES evaluates gasification objectively, as one of the available conversion technologies, and engineers it on the owner’s behalf only where the feedstock, the site and the goals support it.

Municipal Infrastructure

Growing cities face growing volumes of municipal solid waste. WES works with governments and municipalities to plan and engineer infrastructure that manages that waste responsibly while generating energy for the community — reducing dependence on landfills and turning a public cost into a public asset. Engagements can range from feasibility studies and technology evaluation through to the engineering and implementation of a complete facility.

Environmental Solutions

Environmental performance is engineered into the solution, not added at the end. High-temperature treatment and a multi-stage gas-cleaning system are designed to keep emissions within strict international standards, subject to local permitting, and the process is designed to recover material rather than simply destroy it:

• High-temperature gasification is designed to break down toxic substances.
• High-temperature treatment produces an inert solid residue that can be reused as a construction material.
• Metals and minerals can be recovered as valuable products.
• Multi-stage gas cleaning is designed to produce a clean, high-value syngas that can substitute for fossil fuels.
• Dioxins and furans are broken down, and by displacing fossil fuels the process can help reduce CO₂ emissions and improve the carbon footprint.

Which waste streams can be converted to energy?

The systems WES evaluates can accept a wide range of caloric feedstocks — biomass and agricultural residuals, municipal solid waste (MSW), industrial waste such as tires, certain hazardous and specialty streams (subject to permitting) and refuse-derived fuel (RDF). Each stream is evaluated on its caloric content, its handling requirements and the products the client wants to recover, and solutions scale from large municipal facilities down to smaller systems.

How does WES decide which waste-treatment technology is right for a project?

WES treats technology selection as an engineering question, not a sales question. Through objective technology evaluation, our engineers weigh the feedstock, the site, the emissions targets, the regulations and the client's objectives, then select and adapt the process that best fits, whether that is gasification or another available conversion technology. Because WES is an independent engineering firm rather than an equipment vendor, the recommendation follows the project rather than a product.