A closed, non-combustion alternative to open burning and open detonation — validated by the U.S. Army, deployable as a modular on-site system.
Executive Summary
The United States munitions industrial base produces energetic waste faster than it can lawfully dispose of it. Open burning and open detonation (OB/OD) — the default disposal route for decades — is under direct regulatory pressure, replacement incinerators are years behind schedule, and production is ramping. Hydrothermal Alkaline Liquefaction Treatment (HALT) offers a fundamentally different path: a closed, non-combustion chemical process that converts nitrocellulose fines and related energetic wastes into non-energetic products and a methane-rich fuel gas — on site, with no stack, no flame, and no energetic residue. The core chemistry has been validated by the U.S. Army Engineer Research and Development Center (ERDC TR-26-8, 2026). Applied Extracts is engineering HALT as a containerized, transportable skid that turns a facility’s most difficult waste stream into recovered energy.
The Problem: Energetic Waste Has Outgrown Its Disposal Options
Every propellant and munitions plant generates energetic process waste — nitrocellulose (NC) fines from purification and dewatering, off-specification propellant, and energetics-contaminated liquids. These materials cannot go to a landfill or a conventional treatment plant: they are reactive hazardous wastes that historically had exactly two exits, open burning and incineration. Both exits are closing:
- Regulation. EPA’s proposed revision to RCRA standards for waste explosives (89 FR 19952, March 2024) would require facilities to evaluate and use safe, available alternative technologies in lieu of OB/OD wherever they exist.
- Consensus science. The National Academies concluded that safe alternatives already exist for certain explosive wastes — while alternatives for bulk energetics remain a critical gap.
- Capacity. Replacement incinerators face permitting resistance, community opposition, emissions liabilities, and multi-year construction delays — while the demilitarization stockpile, already hundreds of thousands of tons, grows every year.
- Production ramp. Artillery ammunition production is expanding across the industrial base, multiplying the waste streams at exactly the moment disposal capacity is shrinking.
Hydrothermal Alkaline Liquefaction Treatment: How It Works
HALT destroys energetic materials in hot, pressurized water made mildly alkaline with sodium hydroxide. At subcritical hydrothermal conditions (approximately 350 °C in the liquid phase, with dilute 0.5 M NaOH and residence times on the order of thirty minutes), the chemistry does two things at once:
- Denitration. The nitrate ester and nitramine functional groups that make the material energetic are cleaved, with nitrogen reporting to benign inorganic species in the aqueous phase.
- Energy recovery. The remaining carbon skeleton is depolymerized and reformed into a methane-rich product gas — recoverable on-site energy rather than a disposal cost.
The process is fully closed. Water and alkali recirculate; there is no combustion, no open flame, no stack, and no energetic residue. Because the operating window is subcritical — far milder than supercritical water oxidation — the system is built from standard ASME code-stamped alloy construction rather than exotic-alloy pressure hardware, which is what makes compact, transportable, economically rational systems possible.
Validated by the U.S. Army
The core HALT chemistry was validated in U.S. Army ERDC technical report TR-26-8 (2026), which demonstrated alkaline hydrothermal conversion of nitrocellulose fines to a methane-rich product gas at the conditions described above. Applied Extracts is engaged with ERDC-CERL on demonstration planning to carry that validated chemistry from the bench to a fielded system. The company’s process embodiments are the subject of U.S. provisional patent filings (2026) — patent pending.
From Chemistry to Hardware: A Modular, Transportable System
Applied Extracts’ deployment concept is a containerized skid — nominally one ton per day of energetic feed per unit — installed at the waste generator’s site. Slurry preparation, high-pressure feed, reaction, heat recovery, gas-liquid separation, and gas polishing are integrated on a single frame under PLC control, with the product gas delivered to the site as fuel. Capacity scales by adding skids in parallel, so a facility can start with a single unit and expand as OB/OD permits retire.
The Economics: Disposal Cost Becomes Recovered Energy
A single 1-TPD HALT skid displaces on-site disposal spending — on the order of $1 million per year at nameplate utilization — while returning approximately 25 GJ per day of methane-rich fuel gas to the host facility’s fuel header. HALT is priced as a per-ton treatment fee plus a fixed charge for equipment build, installation, and commissioning; the host provides site utilities and receives the green methane and renewable-fuel credits.
| Disposal route | Permitting burden | Timeline to deploy | Emissions / liability |
|---|---|---|---|
| OB/OD (where still permitted) | Existing permits under active regulatory pressure; renewals increasingly contested | In place today; retiring | Uncontrolled air emissions; soil and groundwater liability; community opposition |
| Off-site incineration / shipment | Generator, transport, and receiving-facility permits; constrained third-party capacity | Subject to third-party capacity and backlog | Hazmat transport risk; liability follows the waste off site |
| On-site incineration (new build) | New air permit; multi-year public process; community opposition | ≈5 years from award to operations | Stack emissions; continuous monitoring burden; permanent fixed asset |
| HALT | Closed treatment unit; no stack or open emission point | ~6 months per skid from in-stock pressure components | No combustion, no stack, no energetic residue; recovered fuel gas |
Safety and Permitting: Designed for the Questions That Matter
HALT’s safety case begins with the process itself, not with layered mitigation of an inherently violent operation. The energetic feed enters the system as a dilute aqueous slurry and is destroyed in continuous flow, so the energetic inventory in process at any moment is small. Operating temperatures are subcritical, there is no combustion anywhere in the process, and the material ceases to be energetic inside the reactor rather than in a downstream step. The hazard profile is that of a code-stamped pressurized-water system handling a dilute slurry — not that of a burn pan, a detonation ground, or an incinerator.
Because the process has no stack and no open emission point, the anticipated permit route is a modification to the host facility’s existing RCRA Part B permit, with the HALT skid permitted as a miscellaneous treatment unit under 40 CFR Part 264, Subpart X — or, for the initial demonstration campaign, a Research, Development, and Demonstration permit under 40 CFR 270.65.
Built on a Proven High-Pressure Platform
The HALT chemistry is Army-validated at bench scale, and the delivery platform, while not yet fielded for this application, is not new engineering. Applied Extracts has designed, built, and fielded dozens of commercial supercritical-CO₂ extraction systems and pilot-scale high-pressure biomass-processing systems — the AE-100 series, at TRL 9. The HALT skid applies the same engineering discipline: code-stamped pressure vessels, certified welding, factory acceptance testing, and remote monitoring, executed with an ISO 9001, ASME U- and R-stamp fabrication partner.
Where HALT Applies
- NC fines. Nitrocellulose fines from propellant manufacturing — the validated anchor application.
- Propellant waste. Off-specification and obsolete single- and double-base propellants, sized and slurried for continuous feed.
- Demil streams. Demilitarization-derived bulk energetics, where closed-disposal capacity is the binding constraint on the national stockpile drawdown.
- Contaminated liquids. Energetics-contaminated process waters and washdown streams, treated in the same closed loop.
Proposed First Engagement: One Skid, One Waste Stream, One Site
Applied Extracts proposes a funded on-site demonstration, scoped deliberately narrow: a single 1-TPD HALT skid operating on a defined NC-fines stream, in a 90-day campaign. Because the skid is built from in-stock pressure components, delivery to site is approximately six months from award. Applied Extracts provides the system, commissioning, trained operations, and a full data package suitable for permitting support and scaling decisions.
If your facility has an energetic waste stream that is getting harder to dispose of every year, we would like to scope a demonstration against it.
Contact: James White, Ph.D. · Founder & CEO · jwhite@appliedextracts.com · 617-818-3332
© 2026 Applied Extracts, Inc. HALT process embodiments patent pending (U.S. provisional applications, 2026). ERDC TR-26-8 is a publication of the U.S. Army Engineer Research and Development Center; reference does not imply endorsement.