Efficacy and Adaptation Mechanisms of Algal-Bacterial Granular Sludge Treatment for Phenolic Wastewater

Water, Journal Year: 2025, Volume and Issue: 17(1), P. 127 - 127

Published: Jan. 5, 2025

The ubiquitous presence of phenolic compounds in effluents poses a risk to aquatic organisms and human health. This study investigates the responses emerging algal-bacterial granular sludge process treating wastewater. results showed that phenol at 1, 10, 100 mg/L had little effect on ammonia-N, chemical oxygen demand (COD), phosphate-P removal. At highest concentration mg/L, average removal rates COD, were 94.8%, 72.9%, 83.7%, respectively. led decline chlorophyll content sludge, concurrently resulting an increase abundance microbial diversity. Algal-bacterial exhibited mechanisms such as elevated extracellular polymeric substances (EPSs), superoxide dismutase (SOD), catalase (CAT) production, which may aid coping with oxidative stress from phenols. research underscores sludge’s potential for wastewater, thereby advancing knowledge field degradation this innovative technology.

Language: Английский

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Screening of Bacteria Promoting Carbon Fixation in Chlorella vulgaris Under High Concentration CO2 Stress

Biology, Journal Year: 2025, Volume and Issue: 14(2), P. 157 - 157

Published: Feb. 3, 2025

The cooperation between microalgae and bacteria can enhance the carbon fixation efficiency of microalgae. In this study, a microalgae-bacteria coexistence system under high-concentration CO2 stress was constructed, bacterial community structure entire analyzed using 16S rDNA technique. Microbacterium sp., Bacillus Aeromonas sp. were screened demonstrated to promote in Chlorella vulgaris HL 01 (C. 01). Among them, + C. experimental group exhibited most significant effect, with an increase about 24% final biomass yield daily 245% (day 7) compared control group. Continuous cultivation symbiosis showed that could utilize compounds secreted by for growth produce nutrients maintain vitality Detection extracellular organic microorganisms culture broth excitation-emission matrix spectral analysis revealed utilized aromatic proteinaceous others produced new required 01. metabolic substances liquids groups liquid chromatography-mass spectrometry, it found 31 unique bacteria, 136 produced. These differential mainly acids their derivatives, benzene compounds, heterocyclic etc. results fully demonstrate ability persistence are improved through material exchange bacteria. This study establishes method screen carbon-fixing symbiotic verifies significantly improve exchange, providing foundation further research microalgae-bacterial fixation.

Language: Английский

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Impacts of hydraulic retention time on organic removal in treating liquor wastewater via algal-bacterial granular sludge

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132394 - 132394

Published: March 1, 2025

Language: Английский

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History of carbon supply shapes the metabolic response of photogranules to light shifts

Water Research, Journal Year: 2025, Volume and Issue: unknown, P. 123557 - 123557

Published: March 1, 2025

Oxygenic photogranules mainly composed of cyanobacteria and heterotrophic bacteria, have gained attention for their ability to treat wastewater (removal C, N, P) without external aeration. Currently, the metabolic dynamics varying nutrient light conditions in treatment systems remains poorly studied. However, understanding how quickly photogranule metabolism changes, whether this change is temporary or permanent important optimal use photogranules. Here, an NMR-based metabolomics approach was applied investigate temporal presence absence acetate with light. Our findings revealed that under carbon-limited conditions, relied on alternative carbon sources, such as N-acetylneuraminate (a constituent EPS) amino acids like hypotaurine L-alanine. This adaptation affected key pathways, including glycolysis, taurine metabolism, tricarboxylic acid cycle. When provided, both phototrophic activities were maintained. Notably, history supply influenced responded shifts. Metabolic indicators showed lag addition altered fatty fixation, leading shifts concentrations distinct profiles when turned off. Thus, NMR identified induced by contrasting lasting several hours, significantly affecting response fluctuations. These results suggest supplementation may shape responses other environmental changes stressors.

Language: Английский

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Integrating Algal-Bacterial Granular Sludge and Down-Flow Hanging Sponge Systems for Purified Terephthalic Acid Wastewater Treatment, Coupled with Granule Digestion: A Techno-Economic and Modeling Approach

Process Safety and Environmental Protection, Journal Year: 2025, Volume and Issue: unknown, P. 107093 - 107093

Published: April 1, 2025

Language: Английский

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Metabolic responses of microalgal-bacterial granular sludge to enrofloxacin and sulfamethoxazole exposure

Bioresource Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132516 - 132516

Published: April 1, 2025

Language: Английский

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Sustainable management of petrochemical wastewater using algal-bacterial granules followed by biogas and biochar production: A techno-economic perspective

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 68, P. 106391 - 106391

Published: Oct. 28, 2024

Language: Английский

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Evaluating the performance and stability of microalgal-bacterial granular sludge in municipal wastewater treatment plants

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 373, P. 123912 - 123912

Published: Dec. 27, 2024

Language: Английский

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