Thermal Depolymerization (TDP): “geology in a container” that turns waste into fuel — and how it fits into the logic of the ERVO project by AVELIFE

In nature, organic residues can take millions of years to “ripen” into oil. Humanity, of course, does not have that much time — but it does have engineering. Thermal Depolymerization (TDP), or thermal depolymerization, is a process that uses temperature, pressure, and water (the so-called hydrous pyrolysis) to break down long organic molecules into shorter hydrocarbon chains suitable for producing energy carriers.

This is not magic, but very pragmatic chemistry: instead of dumping waste into landfills (where it produces methane, toxic leachates, and eternal problems), we turn it into resources.

What is TDP in simple words?

Thermal depolymerization is the thermo-chemical processing of organic waste in a water environment at high temperatures and pressures.

Raw materials (what can be processed)

• biomass and agro-waste;
• manure, livestock waste;
• sewage sludge;
• mixed organic fractions of MSW;
• plastics (often in combinations with other fractions).

Products (what we get)

• synthetic “oil” / liquid fuel (raw material for further refining/fractionation);
• Syngas (syngas) is a gas fraction that can be used as a fuel to power the process;
• solid carbon residue (such as carbon black/char) — depending on the raw material and modes, it can be fuel or carbon black/carbon additive.

How does TDP differ from “conventional” pyrolysis?

Classical pyrolysis usually proceeds without water (in an inert environment or with a minimum of oxygen). In contrast, thermal depolymerization uses water as the reaction medium. This allows for better control over the decomposition of polymers and organics, as well as improving the quality of the final products. This is especially important for the processing of “wet” waste (sewage sludge, biomass, manure), since their preliminary drying is energy-intensive and economically unprofitable. [1]

Why it’s important right now: economy + ecology + community safety

TDP/depolymerization technologies are critically important in today’s environment for several reasons. They not only solve the problem of disposal, but also create new economic opportunities. According to research, waste processing using thermochemical methods can significantly reduce landfill volumes and associated greenhouse gas emissions. [2]

Key benefits:

• reducing the amount of waste that would otherwise go to landfill;
• reduction of methane emissions from organic matter decay;
• translating “disposal costs” into a resource model (fuel/gas/carbon);
• creating a basis for a circular economy at the local level: “waste → energy → local sustainability”.

Current reviews emphasize that the integration of such technologies is key to regional energy security and environmental sustainability. [3]

How does this relate to AVELIFE and our ERVO project?

At AVELIFE, we view waste recycling not as “disposal” but as restoring the balance of materials and energy in communities. Our approach is based on modern engineering solutions described in the specialized literature on waste and resource management. [4]

ERVO / Typhoon ERVO in our solution ecosystem

ERVO is a direction that we are developing as a mobile/modular plant capable of processing plastic, rubber, and sedimentary waste into energy using catalytic depolymerization and pyrolysis.

The key logic here is very close to TDP:

· we also work with the destruction of polymer chains to useful fractions; · we obtain liquid fuel, gas (for autonomous energy supply of the process) and solid carbon residue; · approach — modularity + autonomy + applied benefit for communities.

According to our experience within ERVO, the unit can produce up to ~60 liters of fuel from 100 kg of raw material (depending on composition and operating conditions), and the gas fraction is used to maintain the energy balance of the unit. This correlates with the efficiency data of similar systems given in technical reports and analytics. [5]

Where ERVO makes the most sense

· communities (local waste recycling without “take it out and forget it”); · agroclusters (production waste + energy autonomy); · infrastructure and logistics hubs; · dual-purpose facilities where energy sustainability is critical.

Practical value for Ukraine: “not waste, but raw materials”

Ukraine simultaneously has:

1. huge waste streams (organics, plastic, sewage sludge),
2. energy risks and deficits,
3. the need for solutions that work locally, without dependence on long supply chains.

Thermal depolymerization class technologies are all about turning a problem into an asset. Implementing such systems allows you to get:

· less landfills and disposal costs; · more local fuel/energy; · fewer emissions and toxic effects; · new local jobs.

According to analytical materials, decentralized modular installations are the most promising for countries with transition economies and high density of agricultural production. [6]

How we present it on avelife.pro: part of the system picture

For AVELIFE ERVO, it is not an isolated “device”, but a brick in a larger architecture:

· waste processing → energy → community stability; · organics/sediment processing → reduction of environmental burden; · carbon residues/sorbents → potential for environmental applications (including in conjunction with other Institute solutions).

We are moving towards a model where waste becomes a resource, and the community is not a “consumer of services” but the owner of the cycle.

Offer for partners and communities

AVELIFE is open to:

· ERVO pilots at community/cluster level; · partnerships with enterprises with plastic/rubber/sediment waste streams; · investment and production cooperations to scale up modular solutions.

Sources and useful links

1. ScienceDirect. Hydrous pyrolysis vs. conventional pyrolysis: A comparative review of product yields and mechanisms. (2023) ― review of the differences between hydropyrolysis (TDP) and classical pyrolysis, analysis of product yields and reaction mechanisms.
2. U.S. Environmental Protection Agency (EPA). Sustainable Materials Management: Non-Hazardous Materials and Waste Management Hierarchy. (2024) ― analytical materials on the waste management hierarchy, methods for reducing landfill volumes and associated emissions.
3. International Energy Agency (IEA). The Role of Waste-to-Energy in the Circular Economy. (2024) ― report on the place of waste-to-energy technologies in the circular economy, analysis of economic and environmental efficiency.
4. MDPI. Energies. “Thermochemical Conversion of Biomass and Waste to Fuels and Chemicals.” (2023) ― нscientific review of modern thermochemical methods for converting biomass and waste into fuels and chemical products.
5. Waste Management World. Modular Pyrolysis Units: A Technical and Economic Assessment. (2024) ― Feasibility study of modular pyrolysis plants, analysis of efficiency and payback indicators.
6. World Bank. What a Waste 2.0: A Global Snapshot of Solid Waste Management to 2050. (2018) ― global waste stream research, analytics on volumes, composition and optimal solutions for different types of economies.