Know what's in
every batch.
Before it ships.
Liquid Symbol is building AI-powered quality intelligence for commercial composting facilities — five-indicator quality assessment, contamination detection, and automated compliance documentation — across your entire operation.
Quality intelligence for
the composting operation.
Today, quality assessment at commercial composting facilities relies on manual inspection — labor-intensive, inconsistent, and undocumented. Liquid Symbol replaces that with a continuous, automated intelligence layer that tells operators exactly what is happening in every windrow, flags problems before product ships, and generates the documentation that certification and customer confidence require.
Continuous assessment
Every windrow, every batch — tracked automatically over its full composting cycle, not just spot-checked at the end.
Contamination caught early
Automated detection of plastic film, glass, and non-compostable materials — before they reach a customer or damage your reputation.
Compliance documentation
Timestamped, photo-documented QA records generated automatically — ready for STA certification, customer audits, and regulatory review.
Ship with confidence
Know exactly when each batch is ready. Reduce over-processing, eliminate guesswork, and stand behind the quality of every load you sell.
A smartphone photo.
An instant QA report.
An operator photographs a windrow and receives an automated, timestamped QA report in seconds — quality indicators documented and ready for your records, your customers, or STA certification files.
How it works
Photograph the pile or windrow
Use any phone camera. The app guides you through three representative angles of the compost surface.
The system assesses quality
Computer vision analyzes maturity, contamination, particle size distribution, and feedstock characteristics from the photos.
The QA report is ready on your phone
A timestamped, geotagged, photo-documented report is generated directly on the device — export it as a PDF, share with customers, or keep it for your STA certification files.
Monitor your facility in the Customer Portal
Every report syncs automatically to a web-based Customer Portal — view quality scores on a live satellite map, track pile trends over time, and flag contamination events.
Step 01 — Capture
The app guides the operator through three representative angles of the compost surface.
Step 03 — QA Report
A signed, photo-documented PDF report generated on the phone — ready to export, share, or file for certification.
Reports list · Pile trend charts
Contamination log · Report verification
Step 04 — Customer Portal
Every report syncs to the Customer Portal — quality scores on a live satellite map, with pile-by-pile trend tracking.
One score.
Five indicators.
Maturity Score
Visual indicators of decomposition stage — ready to ship, or more time needed.
Presence of Contamination
Detection of plastic film, glass, and visible non-compostable materials in the batch.
Particle Size Distribution
Assessment of whether particle sizing meets application-grade specifications for your market.
Visibility of Feedstock Materials
Assessment of how discernible individual feedstock fragments remain — an indicator of decomposition progress.
Uniformity of the Compost
Visual measure of how consistently feedstock materials are blended through the windrow.
Our technology can
help you today.
Help us make it better.
We're working with a small number of commercial composting facilities to improve the product in real-world conditions — and to collect the field data needed to build additional capabilities into our technology.
Pilot sites get immediate value from the QA reports we can deliver today, while helping shape a more complete product that benefits the whole industry. No purchase commitment. No equity or ownership offered.
What you get
- — Full system access at no cost
- — QA reports for your own records
- — Direct input on feature development
What we ask
- — Access to photograph windrows
- — Feedback on assessment accuracy
- — A brief monthly check-in call
No strings
- — No purchase commitment
- — No equity or ownership offered
- — Exit the program any time
Building tools for
the organic materials
management industry.
Liquid Symbol is an early-stage computer vision company focused on industrial composting. Our technology is designed for the practical realities of commercial facilities — field conditions, phone cameras, and operators who need answers quickly.
Liquid Symbol LLC is registered in the state of California.
Matthew Woods, PhD
Matthew is the founder and lead developer at Liquid Symbol. He brings over twenty years of experience in computer vision and machine learning to the problem of industrial organic materials quality assessment.
Questions, partnership inquiries, or just want to talk composting? Reach out below.
Let's talk
about your
facility.
Whether you want to learn more about the pilot program, ask about how the technology works, or discuss your facility's QA workflow — we want to hear from you.
171 Branham Ln, Ste 10 POB 1049
San Jose, CA 95136