Role of cyclic diguanylate in affecting microbial community shifts at different pH during the operation of simultaneous partial nitrification, anammox and denitrification process

The Science of the Total Environment
Chao WangDong Wang

Abstract

The intracellular cyclic diguanylate acid (c-di-GMP) has emerged as a prominent second signal molecule that coordinates sessile-motile transition and biofilm formation in many bacteria. Herein, we study the role of c-di-GMP in affecting microbial community shifts at different pH levels during simultaneous partial nitrification, anammox and denitrification process (SNAD) in integrated fixed film activated sludge (IFAS) reactor. The results demonstrated that the contents of c-di-GMP notably decreased in suspended sludge, whereas the contents of c-di-GMP in biofilm had no significant change as pH gradually increased from 7.5 to 8.5. Most of the bacteria (Blastocatella, Brevundimonas) with flagella that have been reported to be regulated by c-di-GMP were present in suspended sludge, and the microbial community structure of suspended sludge had obvious change than biofilm. The increased alkaline pH reduced intracellular c-di-GMP content for increasing the motility of bacteria to be washed out from the reactor, causing the microbial community shifts in suspended sludge. This change would lead to the increase of nitrite-oxidizing bacteria which would inhibit anammox activity. Overall, this study provided more comprehensive information...Continue Reading

Citations

Jul 12, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Han WeiPeng Zhao-Xu
Jul 23, 2020·Archaea : an International Microbiological Journal·Ruili YangShaohua Chen
Nov 6, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Quan YuanHui Gong
Oct 19, 2020·The Science of the Total Environment·Zhi-Cheng ZhaoNan-Qi Ren
Jun 9, 2020·Journal of Environmental Management·Sharjeel WaqasMuhammad Aslam
Aug 18, 2021·Food Science & Nutrition·Xingjiang LiXuefeng Wu
Nov 1, 2021·The Science of the Total Environment·Weiqiang ZhuSiegfried E Vlaeminck

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biofilms

Biofilms are adherent bacterial communities embedded in a polymer matrix and can cause persistent human infections that are highly resistant to antibiotics. Discover the latest research on Biofilms here.

Biofilm & Infectious Disease

Biofilm formation is a key virulence factor for a wide range of microorganisms that cause chronic infections.Here is the latest research on biofilm and infectious diseases.