Characterization of microbial consortia in anaerobic granular sludge : a ribosomal RNA-based molecular approach

2000 ◽  
Author(s):  
On-chim Chan
Keyword(s):  
Ribosomal Rna ◽  
Granular Sludge ◽  
Microbial Consortia ◽  
Anaerobic Granular Sludge ◽  
Molecular Approach

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 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.

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.

scholarly journals Characterization of arsenic species in the anaerobic granular sludge treating roxarsone-contaminated wastewater

2017 ◽  
Vol 327 ◽  
pp. 162-168 ◽  
Author(s):  
Peilun Ji ◽  
Rui Tang ◽  
Ping He ◽  
Shoujun Yuan ◽  
Wei Wang ◽  
...  
Keyword(s):  
Granular Sludge ◽  
Arsenic Species ◽  
Anaerobic Granular Sludge

Characterization of anaerobic granular sludge using a rheological approach

2016 ◽  
Vol 106 ◽  
pp. 116-125 ◽  
Author(s):  
Hou-Feng Wang ◽  
Hao Hu ◽  
Hai-Yang Yang ◽  
Raymond J. Zeng
Keyword(s):  
Granular Sludge ◽  
Anaerobic Granular Sludge

Toxicity of Sulfite and Cadmium to Anaerobic Granular Sludge

1994 ◽  
Vol 29 (4) ◽  
pp. 581-598
Author(s):  
C.F. Shew ◽  
N. Kosaric
Keyword(s):  
Granular Sludge ◽  
Upflow Anaerobic Sludge Blanket ◽  
Shock Load ◽  
Anaerobic Sludge ◽  
Anaerobic Granular Sludge ◽  
Scanning Electron Micrographs ◽  
Bacterial Growth Rate ◽  
Digestion Rate ◽  
Sulfate Reducing ◽  
Load Conditions

Abstract Toxicity of sulfite (Na2SO3) and cadmium (CdCl2) ions to anaerobic granular sludge was investigated in 1.2 litre bench-scale upflow anaerobic sludge blanket (UASB) reactors during process acclimation and shock load conditions. Minimal sulfite toxicity was observed under gradual and shock load conditions at sulfite concentrations of up to 1000 mg S/L if proper acclimation was allowed to occur. No long-term toxic effects were observed although the COD digestion rate was temporarily inhibited by shock load of sulfite. Scanning electron micrographs indicated that more sulfate-reducing bacteria were present in the granules developed in the reactors with sulfite supplement although rod-shaped Methanosaeta-like bacteria were still dominant. High bacterial growth rate was observed in the reactors which were supplied with the feed containing sulfite. The COD digestion rate was inhibited at a cadmium loading rate of 2.4 g Cd per day under both acclimation and shock load conditions. Acclimation did not seem to improve the bacteria to tolerate the toxicity of cadmium. The concentration of free cadmium was very low in the reactors under normal conditions, but increased rapidly when the COD digestion in the reactors ceased. The bacteria could not be reactivated after inhibited by cadmium. When reactors were operated at low specific COD loading rates, more inorganic precipitates were formed inside the granules which consequently settled faster.

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