Successful start-up of the anammox process in constructed wetland microcosms: influence of the electron acceptors on performance, microbial community, and functional genes

2019 ◽  
Vol 26 (5) ◽  
pp. 5202-5209 ◽  
Author(s):  
Huai Li ◽  
Zifang Chi ◽  
Baixing Yan
Keyword(s):  
Microbial Community ◽  
Constructed Wetland ◽  
Electron Acceptors ◽  
Functional Genes ◽  
Start Up ◽  
Anammox Process

A fast start-up of the organotrophic anammox process inoculated with constructed wetland sediment

2019 ◽  
Vol 138 ◽  
pp. 454-460 ◽  
Author(s):  
Xuejiao Yin ◽  
Jun Zhai ◽  
Wei Hu ◽  
Yue Li ◽  
Md. Hasibur Rahaman ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Wetland Sediment ◽  
Start Up ◽  
Fast Start ◽  
Anammox Process

scholarly journals Achieving fast start-up of anammox process by promoting the growth of anammox bacteria with FeS addition

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Chunzhen Zou ◽  
Beibei Guo ◽  
Xuming Zhuang ◽  
Liying Ren ◽  
Shou-Qing Ni ◽  
...  
Keyword(s):  
Microbial Community ◽  
Nitrogen Removal ◽  
Nitrite Reductase ◽  
Removal Rate ◽  
Anammox Bacteria ◽  
Gene Encoding ◽  
Start Up ◽  
Fast Start ◽  
The Difference ◽  
Anammox Process

Abstract The effects of FeS on nitrogen removal performance and microbial community of anammox process were studied. During the start-up period, the removal efficiencies of nitrite and total nitrogen were significantly improved by FeS. The addition of FeS increased the content of iron ions in the reactor and promoted the synthesis of heme c, which was involved in the formation of various enzymes. Compared with the control, the abundance of anammox bacteria in the FeS reactor was increased by 29%, and the expression level of the nirS gene (encoding cd1 type nitrite reductase containing heme) was nearly doubled. The content of nitrite reductase (ammonia-forming) in the community was increased by 26.4%. The difference in functional bacteria and enzyme contents in the microbial community resulted in a difference in nitrogen removal rate (NRR) between the two reactors. High-throughput results indicated that FeS increased the richness and diversity of microbial community and enhanced the metabolic function of the microbial community. The addition of FeS did not change the dominant position of Ca. Kuenenia in both reactors. But the relative abundance of heterotrophic denitrifying bacteria was reduced with FeS, which may be related to the inhibition effect of S2− produced by FeS.

scholarly journals Deciphering the evolution of the functional genes and microbial community of the combined partial nitritation-anammox process with nitrate build-up and its in situ restoration

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 111702-111712 ◽  
Author(s):  
Yuanyue Wang ◽  
Hongyan Wang ◽  
Junya Zhang ◽  
Li Yao ◽  
Yuansong Wei
Keyword(s):  
Microbial Community ◽  
Retention Time ◽  
Functional Genes ◽  
Partial Nitritation ◽  
Sludge Retention Time ◽  
Anammox Process

The operation of a combined partial nitritation-anammox (CPNA) process was hampered by the overgrowth of NOB, which was then successfullyin siturestored by the combination of hydroxylamine (NH2OH) dosing and sludge retention time (SRT) control.

scholarly journals Accelerated start-up, long-term performance and microbial community shifts within a novel upflow porous-plated anaerobic reactor treating nitrogen-rich wastewater via ANAMMOX process

RSC Advances ◽  
2019 ◽  
Vol 9 (45) ◽  
pp. 26263-26275 ◽  
Author(s):  
Dachao Zhang ◽  
Shi Xu ◽  
Philip Antwi ◽  
Longwen Xiao ◽  
Wuhui Luo ◽  
...  
Keyword(s):  
Microbial Community ◽  
Porous Plate ◽  
Schematic Diagram ◽  
Anaerobic Reactor ◽  
Start Up ◽  
Community Shifts ◽  
Long Term Performance ◽  
Term Performance ◽  
Anammox Process

Schematic diagram of the upflow porous-plate anaerobic reactor and nitrogen removal pathways occurring within the reactor.

scholarly journals Start-up performance of anaerobic/aerobic/anoxic-sequencing batch reactor (SBR) augmented with denitrifying polyphosphate-accumulating organism (DPAO) and their gene analysis

2018 ◽  
Vol 78 (3) ◽  
pp. 523-533
Author(s):  
Yifang Zhang ◽  
Meng Li ◽  
Qian Zhang ◽  
Wenjiao Sang ◽  
Yiheng Jiang
Keyword(s):  
Microbial Community ◽  
16S Rrna ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Community Diversity ◽  
Functional Genes ◽  
Microbial Community Diversity ◽  
Start Up ◽  
Functional Bacteria ◽  
Relationship Of

Abstract This paper was aimed at investigating the bio-augmentation performance of anaerobic/aerobic/anoxic-type sequencing batch reactor (SBR) during its start-up period by introducing a strain of denitrifying polyphosphate-accumulating organism (DPAO). Two SBR reactors were inoculated to study the start-up performance, with one for DPAO introduction and the other as the control specimen. A comparison, of microbial community diversity based on the reactor which obtained a better performance, was made between polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) analyses encoded by 16S rRNA and functional genes (nirS, nirK). The results indicated that the introduction of DPAO had a positive effect on the biological system, including a reduction of the start-up period, the improvement of sludge characteristics and the removal efficiency of nutrients, especially for phosphorus. By comparing the phylogenetic relationship of 16S rRNA and functional genes (nirS, nirK) of the reactor augmented with DPAO, it could be found that the phylogenetic relationship of these genes were remarkably inconsistent with each other. Therefore, 16SrRNA should not be used to determine the microbial community diversity of functional bacteria which could accomplish denitrification, and gene nirK should not be neglected when determining functional bacteria.

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