Quantify how much of the waste your process generates is recovered or recycled, rather than discarded. Enter each waste stream, record how much you recover, and the overall recycling rate updates live — all in your browser, never on a server.
The Waste Recycle Rate (WRR) measures what fraction of the total waste generated by a chemical process is recovered, recycled, or valorised — rather than being sent for disposal. Where the E-factor tells you how much waste you produce, the WRR tells you how much of that waste you claw back. Together, they paint a complete picture of process circularity.
| Symbol | Term | Units |
|---|---|---|
| WRR | Waste Recycle Rate | % (0–100); higher is better |
| \(m_{\text{recycled}}\) | Total mass of waste actually recovered or recycled across all streams | kg (or g) |
| \(m_{\text{waste generated}}\) | Total mass of all waste generated (all streams, before recovery) | kg (or g) |
Any material that is not the desired product counts as "waste generated" — solvents, by-products, catalyst residues, and workup materials. If some of that material is recovered and returned to the process (or diverted to another productive use), it counts as "recycled." The WRR is the ratio of these two quantities, expressed as a percentage.
| Sector / Context | Typical WRR | Key driver |
|---|---|---|
| Continuous industrial processes | > 80% | Integrated solvent loops, distillation columns, catalyst regeneration |
| Fine chemicals (optimised) | 50–80% | Rotary evaporation, solvent polishing, catalyst reuse |
| Pharmaceutical batch (API) | 25–50% | Complex workup; some solvent recovery but multi-solvent systems limit reuse |
| Early-stage lab / teaching lab | < 25% | Low throughput; solvent recovery often absent; water workup not recovered |
| Metric | What it measures | Direction |
|---|---|---|
| E-factor | Mass of all waste per mass of product — how much waste the process produces | Lower is better |
| PMI | Total mass of all inputs per mass of product — overall mass efficiency | Lower is better |
| WRR | Fraction of generated waste that is recovered or recycled — process circularity | Higher is better |
| Zero-Waste Index (ZWI) | Fraction of total output that is product rather than waste — efficiency complement | Higher is better |
| Solvent Recycle Index (SRI) | Fraction of solvent used that is recovered — solvent-specific recycling | Higher is better |
Enter every waste stream generated by your process — solvents, by-products, catalyst residues, and workup materials. For each stream, record the total mass generated and the mass actually recycled or recovered (e.g. by rotary evaporation, distillation, or catalyst filtration). Do not enter the desired product here.
| Waste stream | Category | Total generated (g) | Recycled / recovered (g) | Stream WRR (%) |
|---|
| Waste stream | Category | Generated (g) | Recycled (g) | Unrecovered (g) | Stream WRR | Visual |
|---|---|---|---|---|---|---|
| Enter waste streams above to see breakdown. | ||||||
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Export your WRR calculation as a PDF report or CSV data file. PDF opens in a new tab and uses your browser's print function. CSV downloads directly.
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This portal was built with the assistance of a large language model (Claude, Anthropic), which was used to generate and refine code, articulate and structure contributed ideas within the defined page format, and support iterative design decisions. All scientific content, conceptual frameworks, pedagogical choices, and final outputs were directed, reviewed, and verified by the contributors listed above.
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