Assessing the performance of uv/H<sub>2</sub>O<sub>2</sub> as a pretreatment process in TOC removal of an actual petroleum refinery wastewater and its inhibitory effects on activated sludge
Bibliographic record
Abstract
The treatment of a petroleum refinery wastewater is studied using a bench scale UV/H 2 O 2 photoreactor in batch mode. The average initial total organic carbon (TOC) concentration is 42 mg/L. Moreover, the initial H 2 O 2 concentrations are 345, 690, and 1023 mg/L for initial H 2 O 2 /TOC molar ratios of 2.9, 5.8, and 8.6, respectively. The results reveal that the highest treatment efficiency of 78.38 % for the removal of TOC from the refinery wastewater using the bench scale UV/H 2 O 2 photoreactor occurs at the reaction time of 45 min and a pH of 5.0. A three‐factor analysis of variance (ANOVA) is used to verify the statistical significance of the initial H 2 O 2 /TOC molar ratio, reaction time, and pH on the bench scale UV/H 2 O 2 photoreactor. Furthermore, the respirometry analysis shows that the pretreated refinery wastewater by the UV/H 2 O 2 process is inhibitory on activated sludge (AS) microorganisms. Thus, the UV/H 2 O 2 process is found to be currently not suitable as a pretreatment process for refinery wastewater treatment at these operational conditions.
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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".