Effect of seed sludge on characteristics and microbial community of aerobic granular sludge

2010 ◽  
Vol 22 (9) ◽  
pp. 1312-1318 ◽  
Author(s):  
Zhiwei Song ◽  
Yuejun Pan ◽  
Kun Zhang ◽  
Nanqi Ren ◽  
Aijie Wang
Keyword(s):  
Microbial Community ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Seed Sludge

scholarly journals Microbial Community Shift and Role of Bacteria in Rapid Granulation By Using Diatomite

2022 ◽  
Author(s):  
Hazlami Fikri Basri ◽  
Aznah Nor Anuar ◽  
Mohd Hakim Abdul Halim
Keyword(s):  
Microbial Community ◽  
Alpha Diversity ◽  
Granular Sludge ◽  
Community Analysis ◽  
Shannon Index ◽  
Microbial Community Analysis ◽  
Aerobic Granular Sludge ◽  
Granulation Process ◽  
Community Shift ◽  
Seed Sludge

Abstract Aerobic granular sludge (AGS) technology is a promising biological method for modern wastewater treatment. However, granulation time have become a major issue for the application of AGS technology especially in low strength wastewater. Recent studies on granulation are focusing towards rapid start-up granulation process. Diatomite, a friable light-coloured sedimentary rock was introduces in this study to enhanced the granules formation. This study highlight the effect of diatomite towards the microbial community during the transformation of seed sludge until development of granules. DNA extraction and Metagenomic analysis was conducted with three samples (seed sludge, control AGS, AGS diatomite) to compare the microbial community. The microbial community analysis revealed the alpha diversity, phylum and class level, and the abundance of EPS producing bacteria of each bacteria samples respectively. Diatomite has a significant influence towards the microbial diversity (High Shannon index alpha diversity). Also, diatomite promotes the abundance of functional bacteria especially EPS producing bacteria, which seen as a crucial elements in granulation process.

Rapid start-up of a nitrifying reactor using aerobic granular sludge as seed sludge

2012 ◽  
Vol 65 (3) ◽  
pp. 581-588 ◽  
Author(s):  
Naohiro Kishida ◽  
Goro Saeki ◽  
Satoshi Tsuneda ◽  
Ryuichi Sudo
Keyword(s):  
Removal Rate ◽  
Granular Sludge ◽  
Ammonia Removal ◽  
High Rate ◽  
Aerobic Granular Sludge ◽  
Nitrite Accumulation ◽  
Ammonia Oxidizing Bacteria ◽  
Continuous Stirred Tank Reactor ◽  
Start Up ◽  
Seed Sludge

In this study, the effectiveness of aerobic granular sludge as seed sludge for rapid start-up of nitrifying processes was investigated using a laboratory-scale continuous stirred-tank reactor (CSTR) fed with completely inorganic wastewater which contained a high concentration of ammonia. Even when a large amount of granular biomass was inoculated in the reactor, and the characteristics of influent wastewater were abruptly changed, excess biomass washout was not observed, and biomass concentration was kept high at the start-up period due to high settling ability of the aerobic granular sludge. As a result, an ammonia removal rate immediately increased and reached more than 1.0 kg N/m3/d within 20 days and up to 1.8 kg N/m3/d on day 39. Subsequently, high rate nitritation was stably attained during 100 days. However, nitrite accumulation had been observed for 140 days before attaining complete nitrification to nitrate. Fluorescence in situ hybridization analysis revealed the increase in amount of ammonia-oxidizing bacteria which existed in the outer edge of the granular sludge during the start-up period. This microbial ecological change would make it possible to attain high rate ammonia removal.

Effect of chromium (VI) on the multiple nitrogen removal pathways and microbial community of aerobic granular sludge

2017 ◽  
Vol 39 (13) ◽  
pp. 1682-1696 ◽  
Author(s):  
Xiao-ying Zheng ◽  
Dan Lu ◽  
Ming-yang Wang ◽  
Wei Chen ◽  
Gan Zhou ◽  
...  
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Granular Sludge ◽  
Aerobic Granular Sludge ◽  
Chromium Vi
Sign in / Sign up

Export Citation Format

Share Document