Feedstock acceptance
Can the site provide stable sludge for continuous testing?
- Dry solids
- Volatile solids
- Ash
- Lipids/proteins/carbohydrates
- Metals screen
Thirty-day variability stays inside the modeled feed envelope.
Pilot Design
From bench signal to wastewater-site trial
The pilot plan treats sewage-to-fuel as a whole-facility integration problem. It must prove conversion, sidestream compatibility, product quality, and economics under the same evidence standard.
HTL conversion
Does the reactor produce enough biocrude at practical severity?
- Biocrude yield
- Gas yield
- Char/solids
- Energy balance
- Heat exchanger duty
Net fuel intermediate improves over AD baseline after parasitic loads.
Aqueous phase integration
Can sidestreams return to the plant without destabilizing treatment?
- COD
- Ammonia
- Toxicity screen
- BMP potential
- Nitrification response
Pretreatment plus recycle load remains inside plant permit and biology limits.
Upgrading and product quality
Can biocrude be upgraded into a credible fuel blendstock?
- Hydrogen demand
- Nitrogen
- Oxygen
- Sulfur
- Distillation range
- Stability
Hydrotreating closes the product-quality gap without erasing the energy or carbon benefit.
Decision economics
Does the integrated system justify scale-up capital?
- Capex class estimate
- Opex
- Carbon intensity
- Waste disposal avoided
- Revenue stack
Sensitivity analysis shows a durable advantage under conservative sludge, energy, and hydrogen prices.
Evidence linked to pilot gates
Energy Conversion and ManagementHTL model validation now has pilot-plant anchorsEnergy & FuelsFuel-quality bottleneck is nitrogen removal after HTLWater ResearchMunicipal sludge HTL literature has enough breadth for a benchmark setFrontiers in Chemical EngineeringAqueous phase handling can decide full-scale feasibility