UniversaBio Fuel

Docker-Generated Aqueous Valorization

Aqueous Valorization Lab

A 3D route workspace for deciding whether HTL process water can help close hydrogen demand, COD removal, water reuse, fuel-gas recovery, nutrient handling, and WRRF compatibility instead of remaining the main scale-up liability.

15

RDKit-checked aqueous, gas, nutrient, corrosion, inhibitor, and fuel-gas molecule markers

8

route options ranked across COD destruction, H2 closure, water reuse, readiness, and risk

RuOx/Ti electrochemical oxidation flow cell

top current route by Docker-generated score

72.5

average hydrogen-closure score in the selected support train

Interactive Aqueous Valorization

Turn the HTL water stream from a liability into hydrogen, fuel gas, heat, or treatment value

Route score350
COD removal88
H2 closure100
Water reuse82
electrochemical H2 and COD route

RuOx/Ti electrochemical oxidation flow cell

flow-cell stability on real sludge HTL water, ammonium tolerance, chloride byproducts, and H2 cleanup

Readiness
60
Fuel gas
74
Energy risk
44
N risk
62

Pyomo-formulated aqueous valorization train with deterministic enumeration across hydrogen, COD, biological-compatibility, and readiness constraints. Current train covers 4 route classes and 14 molecule markers.

Route molecule markers

Acetic acid; Propionic acid; Butyric acid; Phenol; Pyridine; Ammonia; Chloride ion; Hydrogen; Ethane; Propane; Butane

The route is only useful if these water-side markers move with COD, nitrogen, H2 purity, and corrosion evidence.

Top molecule
Butyric acid
Source IDs
valorization-eco-pnnl-2025; valorization-cleanset-pnnl

The highest-upside route is electrochemical: use HTL aqueous COD to make H2 and C2-C4 gases, while reducing wastewater load before recycle or WRRF return.

Aqueous valorization can close hydrogen and water loops only if ammonium, chloride, nitrogen heterocycles, PFAS, electrode/catalyst life, and plant biological compatibility are measured together.

This is a support-train discovery screen. It does not replace oil upgrading, fuel specifications, residual routing, or TEA/LCA validation.

Current aqueous decision

Treat HTL water as the next discovery surface

Recent sources make the strongest new improvement path clear: the HTL aqueous phase should be tested as a coupled H2, COD, heat, fuel-gas, nutrient, and WRRF-compatibility problem. ECO/CleanSET and microbial electrolysis are high-upside H2 routes, wet air oxidation is a robust COD and toxicity reducer, and ambient catalytic upgrading is a TEA/LCA monetization lead. None of these remove the need for measured nitrogen, chloride, PFAS, corrosion, and biological-compatibility gates.

Top score350

RuOx/Ti electrochemical oxidation flow cell is the top route because it can connect COD removal with H2 and C2-C4 fuel-gas value.

Portfolio score1401.3

The selected train covers electrochemical, catalytic, bioelectrochemical, and high-severity carbon-recovery options.

Max COD removal96

Deep COD removal is possible on paper, but refractory acids and N-heterocycles decide whether the route actually de-risks the plant.

Selected support train

Four aqueous routes to test before scaling the HTL-hydrotreating loop

electrochemical H2 and COD route

RuOx/Ti electrochemical oxidation flow cell

Score 350; COD 88; H2 closure 100; water reuse 82; readiness 60. Must prove: flow-cell stability on real sludge HTL water, ammonium tolerance, chloride byproducts, and H2 cleanup.

monetization and fuel-gas route

Ambient-pressure aqueous catalytic upgrading

Score 335.1; COD 90; H2 closure 56; water reuse 78; readiness 54. Must prove: catalyst cost/life, real HTL-water poisons, gas cleanup, and nutrient product quality.

bioelectrochemical H2 route

Pilot microbial electrolysis cell

Score 330.8; COD 72; H2 closure 88; water reuse 64; readiness 64. Must prove: site-specific biofilm stability, methanogen suppression, H2 purity, and inhibitory HTL-water tolerance.

high-severity carbon recovery route

Catalytic hydrothermal gasification

Score 296.2; COD 96; H2 closure 46; water reuse 84; readiness 52. Must prove: high-pressure catalyst life, salts and sulfur poisons, heat recovery, and pressure-system economics.

Route ledger

Every treatment option moves a different part of the risk

electrochemical H2 and COD route

RuOx/Ti electrochemical oxidation flow cell

Score
350
COD
88
H2
100
Energy risk
44
monetization and fuel-gas route

Ambient-pressure aqueous catalytic upgrading

Score
335.1
COD
90
H2
56
Energy risk
30
bioelectrochemical H2 route

Pilot microbial electrolysis cell

Score
330.8
COD
72
H2
88
Energy risk
34
high-severity carbon recovery route

Catalytic hydrothermal gasification

Score
296.2
COD
96
H2
46
Energy risk
72
WRRF integration route

Ozone plus biological polishing

Score
215.3
COD
78
H2
0
Energy risk
50
thermal oxidation and heat route

Continuous wet air oxidation

Score
212
COD
95
H2
0
Energy risk
54
lowest-complexity treatment route

Diluted aerobic co-treatment at WRRF

Score
174.6
COD
64
H2
0
Energy risk
38
yield-recycle route

Controlled aqueous recycle to HTL

Score
112.2
COD
18
H2
0
Energy risk
18

Category ledger

Route classes separate the hydrogen, COD, water, and treatment claims

electrochemical H2 and COD route
Routes
1
Score
350
COD
88
H2
100
monetization and fuel-gas route
Routes
1
Score
335.1
COD
90
H2
56
bioelectrochemical H2 route
Routes
1
Score
330.8
COD
72
H2
88
high-severity carbon recovery route
Routes
1
Score
296.2
COD
96
H2
46
WRRF integration route
Routes
1
Score
215.3
COD
78
H2
0
thermal oxidation and heat route
Routes
1
Score
212
COD
95
H2
0
lowest-complexity treatment route
Routes
1
Score
174.6
COD
64
H2
0
yield-recycle route
Routes
1
Score
112.2
COD
18
H2
0

Aqueous molecule ledger

Molecules that make or break the water-side value claim

volatile fatty acid

Butyric acid C4H8O2

Priority
255.1
COD
72
H2
62
Inhibition
30
volatile fatty acid

Propionic acid C3H6O2

Priority
242.4
COD
70
H2
58
Inhibition
28
phenolic inhibitor

Phenol C6H6O

Priority
220.1
COD
76
H2
34
Inhibition
82
N-heterocycle

Pyridine C5H5N

Priority
219.5
COD
58
H2
28
Inhibition
86
upgrading reagent

Hydrogen H2

Priority
217.4
COD
0
H2
100
Inhibition
0
refractory carboxylate

Acetic acid C2H4O2

Priority
201.2
COD
66
H2
46
Inhibition
26
organic nitrogen

Urea CH4N2O

Priority
152.9
COD
32
H2
20
Inhibition
34
fuel gas

Butane C4H10

Priority
141.1
COD
0
H2
36
Inhibition
0
fuel gas

Propane C3H8

Priority
134.4
COD
0
H2
34
Inhibition
0
fuel gas

Ethane C2H6

Priority
127.6
COD
0
H2
32
Inhibition
0
aqueous nitrogen

Ammonia H3N

Priority
109.5
COD
0
H2
8
Inhibition
58
fuel gas

Methane CH4

Priority
101.8
COD
0
H2
36
Inhibition
0
denitrification product

Nitrogen N2

Priority
73
COD
0
H2
0
Inhibition
0
electrolyte and corrosion marker

Chloride ion Cl-

Priority
70.6
COD
0
H2
0
Inhibition
22
oxidation product

Carbon dioxide CO2

Priority
30.4
COD
0
H2
0
Inhibition
0

Top molecule markers

Short-chain acids and inhibitors define the first bench assays

HTL aqueous

Butyric acid

water-soluble carbon that can be converted to C2-C4 gas and hydrogen. Electrochemical fit 84; fuel-gas potential 82; water signal 84.5.

HTL aqueous

Propionic acid

short-chain acid candidate for electrochemical fuel-gas conversion. Electrochemical fit 82; fuel-gas potential 74; water signal 87.

HTL aqueous and oil

Phenol

slow-oxidizing toxicity marker for WAO and biological polishing. Electrochemical fit 62; fuel-gas potential 28; water signal 76.8.

HTL aqueous and oil

Pyridine

refractory nitrogen heterocycle and recycle-toxicity marker. Electrochemical fit 54; fuel-gas potential 20; water signal 71.5.

gas

Hydrogen

hydrotreating loop closure product. Electrochemical fit 92; fuel-gas potential 74; water signal 56.

HTL aqueous

Acetic acid

dominant slow-oxidizing acid after partial wet oxidation. Electrochemical fit 72; fuel-gas potential 42; water signal 88.8.

HTL aqueous

Urea

water-soluble protein nitrogen proxy. Electrochemical fit 46; fuel-gas potential 14; water signal 95.4.

gas

Butane

CleanSET C4 gas product signal. Electrochemical fit 74; fuel-gas potential 84; water signal 43.5.

valorization-eco-pnnl-2025

Electrocatalytic oxidation of HTL aqueous phase for on-site wastewater treatment and H2 production

PNNL 2025 source reporting ECO COD-removal efficiency, stability dependence on AP composition, ammonium/chloride effects, and a preliminary H2 balance for sludge HTL.

Open source
valorization-wao-pnnl-2025

Continuous wet air oxidation of HTL aqueous product from wet wastes

PNNL 2025 source reporting continuous WAO COD reduction, refractory acids and N compounds, and improved downstream methane kinetics.

Open source
valorization-mec-pnnl-2025

Pilot microbial electrolysis cell closes the hydrogen loop for hydrothermal wet-waste conversion

PNNL 2025 source reporting a >250 L pilot MEC treating HTL wastewater with high-purity H2 and hydrogen recovery.

Open source
valorization-cleanset-pnnl

CleanSET electrochemical treatment technology

PNNL technology source for RuOx/Ti flow-cell treatment of HTL wastewater and conversion of small organics to H2 and C2-C4 fuel gases.

Open source
valorization-monetization-pnnl-2024

Aqueous-phase product treatment and monetization options for wet-waste HTL

PNNL TEA/LCA source identifying ambient-pressure catalytic upgrading as a low-MFSP and low-GHG aqueous-phase monetization route.

Open source
valorization-review-2026

Recent advances on treatment and valorization of HTL aqueous phase

2026 process-intensification review indicating integrated treatment trains outperform single units and summarizing WAO/ECO COD-reduction opportunities.

Open source
valorization-rsc-wet-waste-2026

Wet-waste HTL TEA/LCA with different biocrude upgrading strategies

Open-access 2026 TEA/LCA source framing sludge, manure, and food-waste HTL with marine fuel, renewable diesel, and SAF upgrading strategies.

Open source
valorization-aerobic-cotreatment-2025

Continuous-flow aerobic co-treatment of municipal-sludge HTL aqueous phase

2025 source for direct WRRF cotreatment economics, aeration-cost penalty, and activated-sludge integration gate.

Open source
valorization-ozone-bio-2025

Ozone enhancement of biological treatment for municipal-sludge HTL aqueous streams

2025 source for ozone-assisted biological treatment of municipal-sludge HTL aqueous streams and recalcitrant inhibitor handling.

Open source
valorization-wrf-pfas-ad-2025

Advancing integration of HTL aqueous into WRRF digestion processes and assessing PFAS fate

Water Research Foundation project source for HTL aqueous integration, digestion inhibition, pretreatment needs, and PFAS fate.

Open source
valorization-chg-pnnl

Combined HTL and catalytic hydrothermal gasification system

PNNL technology source for CHG treatment of aqueous HTL effluents containing residual organics.

Open source
valorization-ap-recycle-2026

Aqueous-phase recirculation effects in sewage-sludge HTL

2026 source showing AP recycle can raise yield while increasing oxygen content and accumulating N-heterocycles.

Open source

aqueous valorization is a support train, not proof of finished fuel, until COD removal, hydrogen balance, nitrogen fate, electrolyte corrosion, PFAS, and WRRF compatibility are measured on site-specific sludge HTL water