scholarly journals Characterization of uranium in the extracellular polymeric substances of anaerobic granular sludge used to treat uranium-contaminated groundwater

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 54188-54195 ◽  
Author(s):  
Hailing Zhang ◽  
Mengxi Cheng ◽  
Weidong Liu ◽  
Fengyu Huang ◽  
Huanhuan Ding ◽  
...  
Keyword(s):  
Extracellular Polymeric Substances ◽  
Granular Sludge ◽  
Contaminated Groundwater ◽  
Anaerobic Granular Sludge

Characterization of the contents and forms (soluble ionic or particulate) of uranium reserved in AnGS's EPS.

Biosynthesis and characterization of cadmium carbonate crystals by anaerobic granular sludge capable of precipitate cadmium

2020 ◽  
Vol 246 ◽  
pp. 122797
Author(s):  
C.M. Martínez ◽  
M. Rivera-Hernández ◽  
Luis H. Álvarez ◽  
Ismael Acosta-Rodríguez ◽  
F. Ruíz ◽  
...  
Keyword(s):  
Granular Sludge ◽  
Anaerobic Granular Sludge ◽  
Cadmium Carbonate

scholarly journals Fluorescent component and complexation mechanism of extracellular polymeric substances during dye wastewater biotreatment by anaerobic granular sludge

2018 ◽  
Vol 5 (2) ◽  
pp. 171445
Author(s):  
Na Li ◽  
Dong Wei ◽  
Qunqun Sun ◽  
Xiao Han ◽  
Bin Du ◽  
...  
Keyword(s):  
Fluorescence Spectra ◽  
Extracellular Polymeric Substances ◽  
Three Dimensional ◽  
Granular Sludge ◽  
Synchronous Fluorescence ◽  
Anaerobic Granular Sludge ◽  
Synchronous Fluorescence Spectra ◽  
Pseudo Second Order ◽  
The Difference ◽  
Complexation Mechanism

In this study, methylene blue (MB) wastewater was biotreated by anaerobic granular sludge (AnGS), and the fluorescent components of extracellular polymeric substances (EPS) and complexation mechanism were evaluated. Based on the experimental data, the sorption of MB by both live and inactivated AnGS followed the pseudo-second-order model, and the adsorption isotherm conformed well to the Langmuir model. It was shown that the difference in the sorption of live and inactivated AnGS was not significant, indicating that the sorption is mainly a physical–chemical process and metabolically mediated diffusion is negligible. The interaction between EPS and MB was proved by three-dimensional excitation–emission matrix (3D-EEM) and synchronous fluorescence spectra. 3D-EEM indicated that protein (PN)-like substances were the main peaks of EPS, and gradually quenched with increase of MB concentrations. According to synchronous fluorescence spectra, the main fluorescence quenching was caused by PN-like and humic-like fractions, and belonged to the static type of quenching. FTIR spectra demonstrated that hydroxyl and amino groups played a major role in MB sorption.

Characterization of anaerobic granular sludge developed in UASB reactors that treat ethanol, carbohydrates and hydrolyzed protein based wastewaters

2008 ◽  
Vol 57 (6) ◽  
pp. 837-842 ◽  
Author(s):  
F. Molina ◽  
C. García ◽  
E. Roca ◽  
J. M. Lema
Keyword(s):  
Distribution Density ◽  
Granular Sludge ◽  
Treated Wastewater ◽  
Uasb Reactor ◽  
Anaerobic Granular Sludge ◽  
Hydrolyzed Protein ◽  
Different Types ◽  
Micro Organisms ◽  
Uasb Reactors

In this work, granules developed from UASB reactors that treat different types of wastewaters (ethanol, carbohydrates and protein-based synthetic wastewaters) were studied. Granule parameters (size distribution; density; settlement characteristics; elemental composition; acidogenic and methanogenic activities) were analyzed along with micro-organisms identified by FISH to better understand granule behavior and its formation process. Micro-organisms distributions in anaerobic granules are highly dependent on the type of treated wastewater. Granules developed in a UASB reactor that treats wastewater with a high content of carbohydrates presented high acidogenic bacteria colonization. Members of Methanosaetaceae were the dominant methanogens in the studied granules, and Methanobacteriales appear to be co-dominant in the granules developed with carbohydrates and protein-based wastewaters.

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