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

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

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

Ammonium is neither consumed nor produced in nitrite oxidation, how does ammonium concentration suppress NOB and why?

04 May 2017 6,194 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

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

• What the possible Persistent Organic Pollutants and Heavy metals present in fluorspar, sediments, and water bodies around its mining area?

Approximate concentrations are require in compared with the WHO permissible limts

11 August 2024 2,723 1 View

Basis set and input instruction to calculate HOMO and LUMO using Orca for Imidazolium based organic salts?

Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...

09 August 2024 5,444 7 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

How to convert g/kg Humic acid dose to kg/ha?

I used humic acid at 0.044 g/kg soil in my pot experiment. But finally, I have to recommend kg/ha. Each pot's soil weight was 11 kg. What is the solution?

02 August 2024 7,186 6 View

How to improve peaks separation in HPLC?

Hi everyone, I'd like to better separate two close peaks coming from a bioconversion sample, I'm currently using a C18 KromaPhase 4,6mm Ø.I. SCHARLAU, particle size (µm): 10, pore size (Å): 100,...

30 July 2024 435 3 View

How to separate the stereoisomers compond in reaction mixture?

how to separate the organic reaction stereo isomers compounds are separate from the reaction mixture any simple methods are available

23 July 2024 8,025 4 View

What additional processing or treatment options are available to enhance biogas plant digestate quality or value?

One has to understand about the enhancement procedures and treatment systems I can list around 12 procedures which are tried and tested and are proven so let us see how many in total the experts...

20 July 2024 3,392 2 View

Iwork on producing organic fertilizer from rice husk. how can I reduce the bioconversion time ?less than two months?

I work on producing organic fertilizer from rice husk. how can I reduce the bio-conversion time ?less than two months

20 July 2024 6,049 3 View

Is cow dung can be in used for repeated use ?

Is this organic cow dung manure now important than artificial fertilizer.if good then why ?

19 July 2024 9,052 2 View

How does the digestate compare to other organic amendments regarding quality and performance in different countries?

Experts are welcome to share their experience country-wise so that we can make a nice document listing all the country-wise experiences. ? How does the digestate compare to other organic...

18 July 2024 5,225 3 View