Bacterial community structure and diversity during establishment of an anaerobic bioreactor to treat swine wastewater

2010 ◽  
Vol 61 (1) ◽  
pp. 243-252 ◽  
Author(s):  
Ping Li ◽  
Yanxin Wang ◽  
Yanhong Wang ◽  
Kun Liu ◽  
Lei Tong
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Methane Production ◽  
Bacterial Community Structure ◽  
Removal Rate ◽  
Swine Wastewater ◽  
Uasb Reactor ◽  
Start Up ◽  
Bacterial Structure ◽  
Cod Removal Rate

An upflow anaerobic sludge blanket (UASB) reactor was successfully established to treat swine wastewater. The bacterial structure and biodiversity of activated sludge in the anaerobic bioreactor were analyzed using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) and amplified 16S rDNA restriction analysis (ARDRA). The UASB reactor was acclimatized with swine wastewater for a period of 36 days and exhibited an increase in daily COD removal rate up to 90% and methane production up to 9.5 L/day for an influent COD of 3,500 mg/L at the end of the start-up period. The reactor was then run continuously with an influent COD of 3,000–6,000 mg/L in the following two months of steady operation, reaching COD removal rate of 90–95% and methane production of 9.5–13.2 L/day respectively. The results of microbial community analysis showed a diversified and abundant bacterial structure and biodiversity during the start-up period, which then changed insignificantly in the steady operation period. The change patterns of the bacterial population function were similar to those of the bioreactor performance, indicating a close relationship between bacterial community structure and treatment efficiency.

scholarly journals Comparative analysis of the composition of bacterial communities from two constructed wetlands for municipal and swine wastewater treatment

2009 ◽  
Vol 8 (1) ◽  
pp. 147-157 ◽  
Author(s):  
Paula Arroyo ◽  
Gemma Ansola ◽  
Ivan Blanco ◽  
Patricia Molleda ◽  
Estanislao de Luis Calabuig ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Bacterial Community Structure ◽  
Typha Latifolia ◽  
Treatment System ◽  
Swine Wastewater ◽  
Wastewater Treatment System ◽  
Wastewater Treatment Systems

This work provides information about bacterial community structure in natural wastewater treatment systems treating different types of wastewater. The diversity and composition of bacterial communities associated with the rhizosphere of Typha latifolia and Salix atrocinerea were studied and compared among two different natural wastewater treatment systems, using the direct sequencing of the 16S ribosomal RNA codifying genes. Phylogenetic affiliations of the bacteria detected allowed us to define the main groups present in these particular ecosystems. Moreover, bacterial community structure was studied through two diversity indices. Ten identified and five non-identified phyla were found in the samples; the phylum Proteobacteria was the predominant group in the four ecosystems. The results showed a bacterial community dominated by beta-proteobacteria and a lower diversity value in the swine wastewater treatment system. The municipal wastewater treatment system presented a high diverse community in both macrophytes (Typha latifolia and Salix atrocinerea), with gamma-proteobacteria and alpha-proteobacteria, respectively, as the most abundant groups.

scholarly journals Methane Production in Dairy Cows Correlates with Rumen Methanogenic and Bacterial Community Structure

2017 ◽  
Vol 8 ◽  
Author(s):  
Rebecca Danielsson ◽  
Johan Dicksved ◽  
Li Sun ◽  
Horacio Gonda ◽  
Bettina Müller ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Dairy Cows ◽  
Methane Production ◽  
Bacterial Community Structure

Effect of earthworm loads on organic matter and nutrient removal efficiencies in synthetic domestic wastewater, and on bacterial community structure and diversity in vermifiltration

2013 ◽  
Vol 68 (1) ◽  
pp. 43-49 ◽  
Author(s):  
L. M. Wang ◽  
X. Z. Luo ◽  
Y. M. Zhang ◽  
J. J. Lian ◽  
Y. X. Gao ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Ammonia Nitrogen ◽  
Domestic Sewage ◽  
Shannon Index

In this paper, we studied the effect of earthworm loads on the removal rates of chemical oxygen demand (COD), ammonia nitrogen (NH3-N), total nitrogen, and total phosphorus from synthetic domestic sewage and on the bacterial community structure and diversity of substrates in earthworm packing beds. The different vermifiltrations (VFs), including the control, are successful in removing both organic matter (OM) and nutrients. The removal rate of NH3-N at 12.5 g of earthworm/L of soil VF is higher compared with that at 0 and 4.5 earthworm load VFs. The highest Shannon index, in the earthworm packing bed, occurred at 16.5 earthworm load VF. Furthermore, the COD removal rate is significantly correlated with the Shannon index, which reveals that OM removal for synthetic domestic sewage treatment at VF might be more dependent on bacterial diversity at the earthworm packing bed. The band distributions and diversities of the bacterial community for samples from different earthworm loads in VFs suggest that the bacterial community structure was only affected within the earthworm packing bed when the earthworm load reached a certain level. The present study adds to the current understanding of OM and nutrient degradation processes in VF domestic wastewater treatment.

Temporally invariable bacterial community structure in the Arabian Sea oxygen minimum zone

2014 ◽  
Vol 73 (1) ◽  
pp. 51-67 ◽  
Author(s):  
A Jain ◽  
M Bandekar ◽  
J Gomes ◽  
D Shenoy ◽  
RM Meena ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Arabian Sea ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Oxygen Minimum
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