Phosphorus removal in a waste-stabilization pond containing limestone rock filters
Bibliographic record
Abstract
This study analyzed samples taken along internal transects through a small waste-stabilization pond system in New Zealand that had rock filters installed between the final maturation cells. The aim of the study was to determine the respective importance of the ponds and rock filters for phosphorus (P) removal since routine monitoring from the preceding 2 months had indicated effluent P levels below 2 g/m 3 for influent levels around 9 g/m 3 . Despite the filters being constructed from a reactive sorbent (i.e., limestone) it was found that phosphorus removal was mainly occurring in the ponds. A solubility analysis suggested that phosphorus removal may have been due to moderate calcium hardness levels of around 60 g/m 3 as Ca 2+ , while an analysis of sludge samples in the system suggested that the ratio of calcium to phosphorus in the sludge was consistent with the precipitation of phosphorus as calcium hydroxyapatite.Key words: waste-stabilization ponds, phosphorus removal, limestone rock filters.
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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 | 0.001 | 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) | 0.000 | 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".