Parallel Bench-Scale Digestion Studies
Bibliographic record
Abstract
Two, 2-L bench-scale digesters were operated for 30 days in Phase I and 32 days in Phase II to evaluate the effectiveness of oxygen and ozone on sludge stabilization. Each digester contained waste activated sludge generated from the Rocky Creek Wastewater Treatment Plant (WWTP) in Macon, Georgia. One digester was sparged with air and the other digester was sparged with ozone. The following parameters were measured frequently during the bench-scale study: pH, total and soluble chemical oxygen demand (COD), temperature, total and volatile solids, and total suspended and volatile suspended solids. The kinetics of total solids (TS) reduction was determined and first order degradation coefficients (KD) for the aerobic and ozonated digesters were 0.0073 days–1 and 0.0278 days–1 respectively in Phase I and 0.0049 days–1 and 0.0186 days–1 in Phase II; indicating that ozone was more effective at destroying TS than oxygen. Total chemical oxygen demand (COD) removals averaged 34.8% and 57.5% respectively, for the aerobic versus ozonated digesters. Soluble COD (SCOD) production per gram of total solids (TS) destroyed was 9.5 and 4.2 respectively, for the Phase I and Phase II aerobic digester and 146 and 120 respectively, for the Phase I and Phase II ozonated digester. Approximately 1.89 mg of oxygen equivalents in terms of COD was required per mg of total volatile solids (TVS) destroyed in the aerobic digester in Phase I versus 1.96 mg oxygen equivalents per mg TVS destroyed in Phase II. Average ozone dosages observed in this study were 2.6 and 0.57 mg of O3 per mg of total solids (TS) destroyed for ozonated digesters in Phase I and II, respectively.
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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 | 0.000 |
| 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 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".