Gasification

Delivering Clean Electrical or Thermal Energy From Waste

Gasification technology continues to gain momentum as more customers realize financial benefits from its implementation. Whether you are aiming for better energy sustainability or reducing your carbon footprint, our patented, commercialized industrial-grade gasification systems can help you achieve a greener future. Our scalable, power-producing systems are custom-designed and built to accommodate each customer’s specific needs. In addition, we offer full management services, enabling continuous operation and maintenance on an ongoing basis.

  1. Predictable financial returns
  2. Hedging against future risk factors such as price increases or government regulation
  3. Converting a variety of biomass materials to deployable green energy
  4. Flexibility of processing as little as 30 tons/day or more than 100 tons/day of material
  5. Eliminating landfill disposal of many types of waste materials
  6. Reducing carbon footprint and greenhouse gases
  7. Producing a valuable by-product with both agricultural and industrial uses

Our facilities are industrial-grade and have been proven through thousands of hours of commercial use. The synthetic fuel gas produced through the clean thermo-chemical process of gasification can be utilized like natural gas for downstream thermal or electrical applications (Downdraft Gasifier), or to provide energy for destruction of biosolids or biological wastes (Fluidized Bed Gasifier).

A Green Energy Alternative

We have used several types of biomass and/or industrial waste to produce clean renewable electrical energy. The design of our power-producing systems are modular, which means customers can scale the plants to meet their energy needs and retain the ability to increase capacity as demand dictates.

Electricity can be generated through Organic Rankine Cycle (ORC) equipment; by combusting our syngas to power steam generators; or, by utilizing gas cleaning technology (Clean Gas Technology) to remove heavier tars so that internal combustion generating equipment can be employed in an economically feasible manner. The size of the plant, the generation system used, and the feedstock preparation systems involved, are always factors driven by the needs of the customers. While the basic design components remain very similar, there is no “one size fits all” solution from Aries Clean Energy. Designing and building to accommodate the need at hand is always a primary consideration.

Clean Conversion of Waste

There is no burning or incineration involved in our gasification systems. The high-temperature process that takes place in our patented downdraft gasifiers is thermo-chemical in nature, and because the introduction of very low levels of oxygen in a sealed environment is computer controlled, the reaction reaches and maintains a steady state which provides a consistent output of only two compounds:

  • Synthetic fuel gas, or producer gas, which can be utilized for clean combustion, much like natural gas, in downstream operations
  • High-carbon biochar which has many uses and is a valuable commodity in itself

Older waste-to-energy systems such as mass burning incineration, on the other hand, produce high levels of toxic emissions which must be constantly monitored and expensively cleaned, along with waste ash that is generally landfilled as a useless material.

Our design and chemical engineers can quickly analyze a customers’ waste stream and energy needs to determine if Downdraft or Fluidized Bed gasification technology provides the most beneficial solution.

Click to Explore Our Gasification Solutions:

Downdraft Biomass Gasification
Fluidized Bed Gasification
Management Services
Biochar

Downdraft Biomass Gasification

Our patented designs allow us to build the world’s largest downdraft gasifier. These major size and throughput increases let our customers capture much better economies of scale, and drastically improve the financial returns over what the technology historically offered.

Downdraft gasification is by far the least complex and most productive of gasification technologies. It has been successfully used for over 100 years, the limiting factor always having been internal mechanical structures that prevented simply making the equipment bigger. That problem has been eliminated in the Aries Clean Energy designs. The result is a process that is very straightforward with only a few moving parts in the gasifier itself. Simpler truly became better.


Feedstocks

Our downdraft gasifiers use a large component of wood-derived biomass material to produce the best results. Other factors we monitor closely are moisture and ash content. When feedstock preparation and sizing are optimized, blending of various types of materials is easily accomplished, and can increase the economic viability of the systems. The following are examples of materials that can be processed to required sizing and used in the downdraft system.

  • Wood
    • Scrap pallets, industrial packing and casing
    • Industrial wood trimmings
    • Bark or milling waste wood
    • Municipal and right-of-way trimmings
    • Cardboard and paper
    • Construction and demolition wood waste
  • Scrap tires and industrial rubber products
  • Food manufacturing, processing and other biomass food waste
  • Biological sludge from municipal or industrial wastewater systems
  • Agricultural crop and animal residues

Applications

The synthetic fuel gas that is produced in the thermal-chemical reaction is clean-burning and very combustible, producing an emissions signature similar to natural gas. The gas can be, and is being, utilized in the following applications:

Electricity

Steam Generators Organic Rankine Cycle Generators Internal Combustion Engines

Steam

Fueling Boilers Community Heating Systems

Direct Thermal

Kiln Operations Sludge Dryers

Combustion

Industrial Thermal Oxidizers

Sustainability Benefits

Our downdraft gasification systems give customers a much more environmentally friendly method of waste disposal, and can lower their dependency on fossil fuels. The fact that the Tennessee Department of Environment and Conservation has awarded two of our customers clean energy grants is the amount of $250,000 for installing our systems speaks to our value in the sustainability arena.

Sustainability benefits for our systems typically can be found in:

  • Achieving zero landfill goals for industry, and helping municipalities conserve/extend the life of their landfill facilities, thus negating the need to site new dumps.
  • Reducing carbon footprints. New green energy production measurably offsets former use of fossil fuels. A considerable reduction in trucking operations also contributes to reducing CO2 by thousands of tons per year. These carbon and greenhouse gas reductions are calculated using EPA standards
  • Enhancing the brand value of a community or an industry can be an integral element in the sustainability value of a gasification system.

Financial Benefits

Analyzing the financial benefits of a gasification project can be quite straightforward in many cases. In other instances, with multiple partners and cost/income centers involved, putting together the true financial picture becomes more complex.

From an economic standpoint, projects are almost always based on some combination of two benefit factors:

  • Waste disposal cost reduction and offsets. These include not only tipping fees, but usually sizable transportation costs. There can be financial benefits in meeting government regulations and avoiding fines imposed for non-compliance in disposal practices.
  • Energy (electrical or thermal) production and the value that brings in terms of offsetting current costs, as well as additional monetary value of utilizing sustainable/renewable power.

Fluidized Bed Gasification

Fluidized bed gasification is a process that converts carbon-containing waste material into a synthetic fuel gas, along with a very small amount of inert ash. Waste feedstock is fed into the gasifier and a controlled amount of oxygen is introduced. Once necessary temperatures are achieved and maintained, a thermo-chemical process converts the biomass into a combustible syngas primarily composed of carbon monoxide, hydrogen and methane. That sustainable fuel can be deployed in a commercial dryer to remove moisture from bio-solids. The system can cleanly reduce volume by as much as 95%.

Because our patented fluidized bed gasification technology consumes little oxygen and results in lower air emissions, it is an attractive alternative to conventional disposal processes such as burning or land application. In fact, the Environmental Protection Agency has specifically established that fluidized bed gasification is not classified as incineration.

Aries Clean Energy brings extensive experience in working with engineering firms, contractors, vendors and financial entities to assist in the smooth integration of our gasifier into an overall biosolids treatment system. Siting facilities is easier than with alternative methods due to the clean emissions profile associated with our gasification process.


Feedstocks

The most suitable feedstocks for the Aries Clean Energy fluidized bed gasification system are biosolids from municipal wastewater treatment plants, or biomass residues from certain types of industrial manufacturing and processing operations.


Applications

The primary use of syngas resulting from our fluidized bed systems is the reduction and disposal of biosolids utilizing conventional industrial gas-powered drying technology.


Sustainability Benefits

Our fluidized bed systems give customers a much more environmentally friendly method of biosolids disposal, and can lower their dependency on fossil fuels. Sustainability benefits for our systems typically can be found in:

  • Achieving zero landfill and/or land application goals for industry and municipalities.
  • Reducing carbon footprints. New green energy production measurably offsets former use of fossil fuels. A considerable reduction in trucking operations also contributes to reducing CO2 by thousands of tons per year. These carbon and greenhouse gas reductions are calculated using EPA standards.
  • Enhancing the brand value of a community or an industry can be an integral element in the sustainability value of a gasification system.

Financial Benefits

Analyzing the financial benefits of a fluidized bed gasification project can be quite straightforward in many cases. In other instances, with multiple partners and cost/income centers involved, putting together the true financial picture becomes more complex.

From an economic standpoint, projects are almost always based on some combination of two benefit factors:

  • Biosolids disposal cost reductions and offsets. These include not only tipping fees, but usually sizable transportation costs. There can be financial benefits in meeting government regulations and avoiding fines imposed for non-compliance in disposal practices.
  • Energy (electrical or thermal) production and the value that brings in terms of offsetting current costs, as well as additional monetary value of utilizing sustainable/renewable power.

Management Services

Operation and maintenance training for our plants is standard in Aries Clean Energy agreements, and we recommend that customer technicians be a part of the construction and commissioning phases to help them understand the entire system and its components.

At the same time, we are also willing to enter into complete facility O&M contracts for the systems we provide. This arrangement gives our customers a predictable budget line item, and transfers the personnel and training responsibilities to us.

Biochar

Biomass feedstock processed through our downdraft gasifier exits the machine either as a synthetic fuel gas or as a high-carbon biochar. There is no ash product that requires disposal.

The charcoal-like biochar is consistently 70% carbon with a high BTU content. It can be used as:

  • Fuel for cement kilns or other operations that utilize solid material
  • Agricultural soil amendment which substantially increases the water and nutrient holding capabilities of most growing media
  • Base material to produce carbon black, a valuable industrial colorant
  • Filtering agent for liquids or gases to remove containments or odors, since the biochar shares many chemical properties with activated charcoal

In most cases, about 95% (by weight) of the raw material gasified is converted to fuel gas with the remaining 5% becoming biochar.