Graphene oxide-induced variations in the processing performance, microbial community dynamics and heavy metal speciation during pig manure composting

2020 ◽  
Vol 136 ◽  
pp. 214-222 ◽  
Author(s):  
Jiabin Li ◽  
Ningning Song
Keyword(s):  
Heavy Metal ◽  
Graphene Oxide ◽  
Microbial Community ◽  
Community Dynamics ◽  
Metal Speciation ◽  
Pig Manure ◽  
Heavy Metal Speciation ◽  
Microbial Community Dynamics

Microbial community structure and performance of an anaerobic reactor digesting cassava pulp and pig manure

2012 ◽  
Vol 66 (7) ◽  
pp. 1590-1600 ◽  
Author(s):  
P. Panichnumsin ◽  
B. Ahring ◽  
A. Nopharatana ◽  
P. Chaiprasert
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Community Dynamics ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Pig Manure ◽  
Relative Distribution ◽  
Cassava Pulp ◽  
Microbial Community Dynamics ◽  
Gradient Gel Electrophoresis ◽  
Substrate Types

Microbial community dynamics in response to changes in substrate types (i.e. pig manure (PM), cassava pulp (CP) and mixtures of PM and CP) were investigated in an anaerobic continuously stirred tank reactor (CSTR). Molecular identification of bacterial and archaeal domains were performed, using a 16S rDNA clone library with polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) screening and phylogenetic analysis. Analysis of bacterial clone libraries revealed that the differences in the community structure corresponded to the substrate types. However, the Bacteroidetes were the most abundant group in all substrates, followed by the Clostridia. With pure PM, the dominant bacterial groups were Bacteroidales, Clostridia and Paludibacter. With a co-substrate, at CP to PM (CP:PM) ratio of 50:50, the sequences analysis revealed the greatest diversity of bacterial communities at class level, and the sequences affiliated with Cytophaga sp. became an exclusive predominant. With CP alone, Bacteroides sp. was the dominant species and this reactor had the lowest diversity of bacteria. Archaea observed in the CSTR fed with all substrate types were Methanosaeta sp., Methanosaeta concilii and Methanospirillum hungatei. Among the Archaea, Methanosaeta sp. was the exclusive predominant. The relative distribution of Archaea also changed regarding to the substrate types.

Anaerobic co-digestion of pig manure and food waste; effects on digestate biosafety, dewaterability, and microbial community dynamics

2018 ◽  
Vol 71 ◽  
pp. 532-541 ◽  
Author(s):  
C. Dennehy ◽  
P.G. Lawlor ◽  
M.S. McCabe ◽  
P. Cormican ◽  
J. Sheahan ◽  
...  
Keyword(s):  
Microbial Community ◽  
Food Waste ◽  
Community Dynamics ◽  
Pig Manure ◽  
Microbial Community Dynamics

HEAVY METAL SPECIATION IN BOTTOM SEDIMENTS OF THE VYSHNEVOLOTSKY RESERVOIR

2018 ◽  
pp. 46-54
Author(s):  
O. A. Lipatnikova
Keyword(s):  
Heavy Metal ◽  
Organic Matter ◽  
Bottom Sediments ◽  
Metal Speciation ◽  
Organic Matter Content ◽  
Water Reservoir ◽  
Matter Content ◽  
Heavy Metal Speciation ◽  
Mobile Forms ◽  
Manganese Hydroxides

The study of heavy metal speciation in bottom sediments of the Vyshnevolotsky water reservoir is presented in this paper. Sequential selective procedure was used to determine the heavy metal speciation in bottom sediments and thermodynamic calculation — to determine ones in interstitial water. It has been shown that Mn are mainly presented in exchangeable and carbonate forms; for Fe, Zn, Pb и Co the forms are related to iron and manganese hydroxides is played an important role; and Cu and Ni are mainly associated with organic matter. In interstitial waters the main forms of heavy metal speciation are free ions for Zn, Ni, Co and Cd, carbonate complexes for Pb, fulvate complexes for Cu. Effects of particle size and organic matter content in sediments on distribution of mobile and potentially mobile forms of toxic elements have been revealed.

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