Characterization of the Microbial Community in a Sequentially Fed Anaerobic Digester Treating Solid Organic Waste
Bibliographic record
Abstract
A lab-scale solid phase anaerobic digester of novel design that treats organics waste was operated at for 88-weeks at the University of Toronto. Characterizing the microbial community inside the digester enables fundamental understanding of the system performance and operational limits. The microbial community was characterized through amplicon sequencing and correlated with operating parameters such as, biogas production rate. Clostridium spp. and organisms from Candidate Division WS6 were the two most dominant bacterial phylotypes and Methanobacterium and Methanoculleus were the two most dominant archaeal phylotypes. A direct relationship between the population of Clostridium spp., proportion of food waste, and biogas production rate was found while Candidate Division WS6 showed better adaptability to fibre rich substrate conditions. Shortened hydraulic retention time of leachate affected the microbial community. Shifts in dominant hydrogenotrophic methanogen spices were observed when HRT was decreased. Clostridium spp. were largely responsible for the enhanced “synergistic” biogas production from fibers.
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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".