Production and Characterization of Foam in the Anoxic Zone of a Membrane‐Enhanced Biological Phosphorus Removal Process
Bibliographic record
Abstract
A pilot-scale membrane-enhanced biological phosphorus removal process accumulated substantial quantities of stable foam on the surface of the anoxic zone. The foam contained 4 to 6% dry matter, with specific nitrogen and phosphorus contents that were similar to those of the underlying anoxic zone mixed liquor. Kinetic studies demonstrated that the specific rate of phosphorus release from the foam was only 25 to 30% of that observed with mixed liquor from the aerobic zone. Molecular techniques demonstrated that the calculated similarity of the microbial communities in the foam and the underlying mixed liquor was approximately 80%, with two phylotypes (Gordonia amarae and Microthrix parvicella) being uniquely enriched in the foam and one phylotype (Epistylis sp.) more abundant in the underlying mixed liquor. The production of foam was demonstrated to be a consistent phenomenon that depended on the concentration of the suspended solids in the bioreactor.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 source (direct Gemma or distilled Codex), 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".