Purple Bacteria for Wastewater Treatment and Resource Recovery
Notice bibliographique
Résumé
Wastewater treatment plants are transitioning into resource-recovery centers that reduce pollution from the wastewater by transforming it into valuable resources.Purple phototrophic bacteria (PPB) have been shown to exhibit accumulative properties under anaerobic conditions while utilizing infrared light as their primary energy source, which reduces energy input into the biochemical process.Manipulating their accumulative properties will allow carbon, phosphorus and energy recovery from wastewater in the form of poly-hydroxyalkanoates (PHAs), poly-phosphates (poly-P) and hydrogen gas, respectively.This work first aimed to investigate the viability of treating wastewater using PPB.A 4-L anaerobic photobioreactor was constructed and illuminated with 850 nm infrared light.Steady-state analysis showed satisfactory chemical oxygen demand (COD) removal with soluble COD dropping to less than 30 mg/L.The enriched biomass under this reactor accumulated about 5 mg-P/L of ortho-phosphates corresponding to 6% of the total dry weight of solids.Fluorescence microscopy analysis with the dye 4,6-diamidino-2-phenylindole (DAPI) suggested that a portion of the accumulated P was in the form of poly-P.An enrichment experiment was conducted to investigate the effect of isolating the carbon sources of the synthetic wastewater (normally comprises eight carbon sources) on the microbial community composition.rRNA gene amplicon sequencing revealed the presence of fermenters when fermentable substrates (starch, milk or glycerol) were fed to the reactors, while only a small amount fermenting bacteria were present when reactors were fed acetate.The latter fermenters were likely fermenting microbial metabolites and macromolecules.The PPB accounted for 50% of the sequence reads when the reactors were illuminated with 850 nm, while they were only 30% of the reads with the 940 nm light.Microbial composition of the reactors fed complete wastewater appeared to be more similar to the fermentable substrates than the acetate reactors.A second experiment was done to examine I also want to extend my appreciation to all the members (Alex, Arshath, Claire, Julie, Sampriti, Sarayu and Vini) of the environmental engineering lab for illuminating this beautiful environment with their companionship.I would also like to acknowledge the people who have lent me their hands and facilitated the completion of this project.Namely, our lab technician, John Bartczak who helped with the reactor construction, my summer student
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».