Biologically induced clogging of a granular medium permeated with synthetic leachate
Why this work is in the frame
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Bibliographic record
Abstract
The results of a laboratory column test conducted to gain insight regarding the clogging mechanisms within porous media are presented. Tests were conducted under saturated, anaerobic conditions using synthetic leachate that models Keele Valley Landfill (KVL) leachate in chemical compositions but has negligible suspended solids and bacterial concentrations compared with KVL leachate. Comparisons were made between tests conducted with synthetic leachate and similar column tests conducted with KVL leachate to assess the presence of suspended solids and bacterial loading on the rate of clogging. It is shown that the synthetic leachate columns behaved similarly to the KVL leachate columns in terms of nutrients removed from the leachate as it passed through the porous media and clog properties (bulk densities and chemical composition). Excessive microbially induced clogging near the influent end of the column (but likely near the collection pipe in a field situation) resulted in a decrease in drainable porosity to less than 10% of the initial value and a decrease in hydraulic conductivity by seven orders of magnitude. Key words: leachate collection, clogging, porous media, anaerobic, laboratory study.
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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 | 0.001 |
| 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 it