Pathogen Characterization of Fresh and Stored Mesophilic Anaerobically Digested Biosolids
Bibliographic record
Abstract
Culturable bacterial pathogens (Campylobacter, Salmonella, Listeria, Yersinia) and indicators (E. coli, enterococci, Clostridium perfringens) were quantified at six water resource recovery facilities that land apply anaerobically digested biosolids in Ontario, Canada. Cryptosporidium parvum and Giardia lamblia were also quantified by polymerase chain reaction (PCR). Salmonella and Listeria were frequently detected in sludge and liquid biosolids (70-100% of samples) but less often in fresh dewatered cake biosolids (50-60%); with low levels in fresh cake (<100 cells/g dw). Yersinia were in 20 to 30% of samples, typically at very low levels (<10 cell/g dw). Giardia and Cryptosporidium were detected in 80 and 20% of cake biosolids at geometric means of 270 cysts/g dw and 70 oocysts/g dw, respectively. E. coli reduction was typically >2-log10 while pathogen reduction was variable. "Sudden increase" of pathogens was not observed, however, Salmonella and E. coli showed regrowth (at 1 to 3 orders of magnitude) after 2- to 3-day storage at 30 °C.
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 | 0.001 | 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".