Phosphorus Recovery\nin Municipal Wastewater and Socioeconomic\nImpacts in Canada and the United States
Bibliographic record
Abstract
Phosphorus is a nonrenewable material essential for ensuring food security whose global reserves are controlled by a limited number of nations. Potential phosphorus insecurity prompted some countries to develop regulations to support a circular phosphorus economy from end-of-life materials. However, the impact of phosphorus recovery costs on the economy of communities served by wastewater resource recovery facilities stays unquantified. We analyze the socioeconomic impact of phosphorus recovery at the wastewater resource recovery facilities of Canada and the continental United States. We found that phosphorus recovery results in a cost gap between urban and rural areas due to the differences in the treatment level and scale of wastewater resource recovery facilities. This cost disparity could lead to the emergence of deprived social groups bearing the economic burden of transitioning toward a circular phosphorus economy. However, the environmental remediation costs avoided by the recovered phosphorus offset the recovery costs, providing an economic driver for phosphorus recovery.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.030 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".