Why does ammonium concentration inhibit the growth of NOB, although it is not used as their energy source?

More Kulthoum Ismail's questions See All

Why CDOM concentrations are much higher in fresh waters and estuaries than in the open ocean?

CDOM is the colored dissolved organic matter. What makes the fresh water higher in CDOM concentrations than the ocean?

05 June 2019 288 4 View

Any brief and concise explanation of the relationship of Dirac, Kronecker delta, and Heaviside step function?

Can anyone relate these functions and explain their potential in real life applications? Thanks, Kulthoum

03 April 2017 10,081 7 View

Is the saturation constant for ammonium in the ASM3 model meant for ammonium-N or both ammonia+ammonium N ?

The half-saturation constant of ammonium in Activated sludge model #3 is given as ammonium, is it for ammonium only or both NH4 +NH3?

01 February 2017 1,538 0 View

Is the activation energy that is calculated from the observations of the maximum growth rate of microorganisms remains constant?

How the activation energy of 69,000 J/mol in the Arrhenius relation is calculated? Does this value change with temperature/ type of microorganisms/....? Any help would be greatly...

08 September 2016 2,665 1 View

Why is the yield (cell production/ammonium consumption) higher in the Annamox than in nitrification?

Both Annamox bacteria and nitrifiers are slow growers and they both grow on ammonium as their energy source, nitrification is aerobic and annamox is anaerobic , shouldn't the yield in...

10 November 2015 5,450 2 View

What is the reason for adding thiosulphate to a medium containing aerobic denitrifiers like T. Pantotropha?

if this organism could denitrify efficiently in the existence of DO, why do we need thiosulfate then ?

07 August 2015 7,835 4 View

Why nitrogen fixation and denitrification are non-reversible reactions whereas nitrification is a reversible reaction?

what are the reasons that make these two reactions irreversible while nitrification reversible?

05 June 2015 8,067 2 View

Why anammox and nitrification need additional electrons for the ammonium reaction?

These two processes are involved in the nitrogen cycle. I wonder why these two pathways need additional electrons !

01 February 2015 4,473 3 View

Can we represent a non-periodic function by a Fourier series?

Any function that is defined over the entire real line can be represented by a Fourier series if it is periodic. What if it is non-periodic?

01 February 2015 3,980 15 View

Can we consider only the kinetics of the nitrite oxidizing bacteria when modelling nitrification pathway?

Since the nitrite produced during the partial nitrification is virtually immediately further nitrified to nitrate. And the rate of conversion of ammonia to nitrite by ammonia oxidizing bacteria is...

01 February 2015 8,212 3 View

How to develop investments in renewable energy sources?

08 August 2024 5,112 3 View

Is artifacts in XPS possible to build high deviation in binding energy larger than 5 eV??

Hello. Thanks for your consideration to see my question. Recently, I conducted XPS anaylsis of g-CN that is prepared from thermal polycondensation of DCDA, so-called conventional bulk-g-CN,...

30 July 2024 9,824 2 View

Culture fibroblasts with or without FGF2?

I'm new to primary human fibroblast culture and I'm studying aging using cells from old and young donors. Some research groups have used media supplemented with FGF2, so I cultured cells in the...

29 July 2024 3,030 2 View

Is there a database with onshore wind production for the wind farms in Portugal?

I am looking to predict some production for future onshore wind energy production in Portugal, is there any database with info of performances of the existing wind farms in the country? something...

28 July 2024 1,750 1 View

HAs anyone used TGA to find activation enegy of water evaporation?

I have different polymer solutions and I hypothesize that water molecules are retained based on the water-polymer interactions, so the amount of free water is less to intercat with drug tablet....

28 July 2024 9,545 6 View

Can we eliminate the stress singularity at the tip of the crack by manipulating the elastic constants?

The aim of the research here is to prevent the propagation of the crack in the fabricated elastic medium with useful applications.

25 July 2024 9,976 3 View

Can anyone kindly suggest research topics in the area of thermodynamics, heat transfer, fluid mechanics or renewable energy?

I am an undergraduate mechanical engineering student seeking suggestions on topics related to either thermodynamics, fluid mechanics, heat transfer or renewable energy for my final year project....

24 July 2024 4,058 5 View

Is it feasible to employ an artificial sun in the experimental investigation of concentrated solar power systems, specifically linear Fresnel systems?

Is it feasible to employ an artificial sun in the experimental investigation of concentrated solar energy systems, specifically linear Fresnel systems? If the answer is affirmative, what type of...

22 July 2024 9,710 6 View

Why binding energy is in positive number after performing mmpbsa?

I performed mmpbsa of protein-protein complex simulation on gromacs. My binding free energy is +166781. This complex is stable when experimentally produced in wet lab. In index.ndx I grouped...

19 July 2024 4,120 5 View

Why electrical charge on the moving plate increase?

Hi, everyone This figure depicts a simulation of an electrostatic energy harvesting system in COMSOL Multiphysics software. My question is regarding the relationship between the changes in...

19 July 2024 4,694 4 View

Surender Singh

Kindly check here..

http://users.ugent.be/~evolcke/pdf/2014%20Kouba%20WST%20ImpactInfluentTotalammoniumNOBinhibitionMBBR.pdf

See this also...

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4564738/

Refer to this..

http://onlinelibrary.wiley.com/doi/10.1002/bit.21018/abstract

Check here too..

http://www.sciencedirect.com/science/article/pii/S0960852414004076