Responses of endogenous partial denitrification process to acetate and propionate as carbon sources: Nitrite accumulation performance, microbial community dynamic changes, and metagenomic insights

Water Research, Journal Year: 2024, Volume and Issue: 268, P. 122680 - 122680

Published: Oct. 21, 2024

Language: Английский

---

Optimizing anaerobic digestion: Benefits of mild temperature transition from thermophilic to mesophilic conditions

Environmental Science and Ecotechnology, Journal Year: 2024, Volume and Issue: 21, P. 100440 - 100440

Published: June 13, 2024

Anaerobic digestion (AD) plays a significant role in renewable energy recovery. Upgrading AD from thermophilic (50–57 °C) to mesophilic (30–38 conditions enhance process stability and reduce input remains challenging due the high sensitivity of microbiomes temperature fluctuations. Here we compare effects two decreasing-temperature modes 55 35 °C on cell viability, microbial dynamics, interspecies interactions. A sharp transition (ST) is one-step by 20 d−1, while mild (MT) stepwise 1 d−1. We find greater decrease methane production with ST (88.8%) compared MT (38.9%) during period. mode overproduced reactive oxygen species 1.6-fold, increased membrane permeability 2.2-fold, downregulated metabolism 25.1%, leading apoptosis anaerobes 1.9-fold release intracellular substances 2.9-fold, further constraining methanogenesis. The higher (1.6 vs. 1.1 copies per gyrA) metabolic activity acetate-dependent methanogenesis implied more efficient steady mesophilic, MT-mediated system. Metagenomic binning network analyses indicated that induced dysbiosis keystone greatly enhanced functional redundancy, causing loss syntrophic interactions redundant pathways. In contrast, interconnections (average degrees 44.9 22.1) at state suggested could better maintain necessary system functionality through syntrophy or specialized Adopting transform digesters into feasible potentially optimization broader application practical anaerobic engineering.

Language: Английский

---

Microalgal-bacterial granular sludge can remove complex organics from municipal wastewater with algae-bacteria interactions

Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)

Published: June 24, 2024

Abstract Interactions between algae and bacteria are pivotal in transforming complex organics for microalgal-bacterial granular sludge process, but the intrinsic removal mechanisms have not been well understood. Here, we investigate by which removed from municipal wastewater. Complex can be disposed during day-night cycles, significantly impacted carbon-to-nitrogen ratio influent. Upregulated gap2 gpmA genes enhanced conversion of into CO 2 , mediated interactions Chlorophyceae with Acidobacteriae / Sumerlaeia Fimbriimonadia upregulated petH gene Cyanobacteria strengthened fixation biomass. The breakdown starch, glycerol, fatty acid were depended on Actinobacteriota Chloroflexia Verrucomicrobiae Desulfobacterota I respectively. These findings provide new insights through symbiosis contribute to our understanding carbon cycle natural aquatic ecosystems.

Language: Английский

---

Microplastics enhance the denitrification of glycogen-accumulating organisms by regulating electronic transport in carbon-nitrogen coupling

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 489, P. 137627 - 137627

Published: Feb. 21, 2025

Language: Английский

---

Impaired denitrification of aerobic granules in response to micro/nanoplastic stress: Insights from interspecies interactions and electron transfer processes

Water Research, Journal Year: 2025, Volume and Issue: 279, P. 123472 - 123472

Published: March 9, 2025

Language: Английский

---

Robust rehabilitation of anammox system by granular activated carbon under long-term starvation stress: Microbiota restoration and metabolic reinforcement

Bioresource Technology, Journal Year: 2023, Volume and Issue: 393, P. 130113 - 130113

Published: Nov. 25, 2023

Language: Английский

---

Electroactive properties of EABs in response to long-term exposure to polystyrene microplastics/nanoplastics and the underlying adaptive mechanisms

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 465, P. 133438 - 133438

Published: Jan. 5, 2024

Language: Английский

---

Metabolic response of bacterial community to sodium hypochlorite and ammonia nitrogen affected the antibiotic resistance genes in pipelines biofilm

Water Research, Journal Year: 2024, Volume and Issue: 252, P. 121179 - 121179

Published: Jan. 25, 2024

Language: Английский

---

Manganese ore enhanced nitrate removal by improving bioavailability of organics released from corncob: Denitrification performance, organics transformation and nitrogen metabolic pathways

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 484, P. 149477 - 149477

Published: Feb. 9, 2024

Language: Английский

---

Effects of microplastics on denitrification and associated N2O emission in estuarine and coastal sediments: insights from interactions between sulfate reducers and denitrifiers

Water Research, Journal Year: 2023, Volume and Issue: 245, P. 120590 - 120590

Published: Sept. 6, 2023

Language: Английский

---