Reduction of hydraulic conductivity changes in an in-ground bioreactor
Bibliographic record
Abstract
The biodegradation of dissolved naphthalene was studied in the laboratory, in preparation for a field-scale investigation of enhanced bioremediation in a permeable barrier. The laboratory experiments were performed, under water saturated conditions, in acrylic columns packed with silica sand. The sand contained 1% by volume of granular activated carbon (GAC). Naphthalene, nutrient, and nitrate solutions were pumped through, and concentrations and liquid pressures were monitored. One objective of the laboratory study was to determine if the decrease in hydraulic conductivity caused by microbial growth could be reduced. It was believed that biomass would attach preferentially to the small proportion of GAC added to the sand. Scanning electron microscope micrographs showing evidence of preferential attachment of biomass on the GAC are presented in this paper. A calculation indicates that the decrease in hydraulic conductivity could be less than 6%. Data gathered to design the field scale bioreactor and the design and assessment of the performance of the permeable barrier are presented elsewhere. Key words: hydraulic conductivity, biomass growth, in-situ bioreactor, granular activated carbon, naphthalene.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| 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".