Comparison between complete and partial recovery of N and P from stale human urine with MAP crystallization
Bibliographic record
Abstract
To provide an option of magnesium ammonium phosphate (MAP) crystallization for different recovery objective and treatment aim of separated stale human urine, five lab-scale tests were conducted, among which two of them acted as complete N and P recovery and three of them as partial N and complete P recovery, respectively. The results showed the recovery efficiencies of PO 4 3– -P were more than 85% when the molar ratio of Mg/N/P was above the needed stoichiometric proportion for MAP precipitation. Although higher recovery efficiencies of NH 4 + -N and PO 4 3– -P could be obtained by adding more phosphate and magnesium salts during MAP precipitation, there existed disadvantages such as inconvenient operation, hard to be put into practice, high operation cost, etc. Thus it was not recommended to completely recover NH 4 + -N and PO 4 3– -P simultaneously if there were no wastes containing high phosphorus on hand. All harvested precipitates were identified as nearly pure struvite with the presence of trace elements of K, Na, Ni, Mn, and Ca.
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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) | 0.000 | 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".