NP pellets in Aerobic & Anaerobic conditions

Discussion in 'Chemical Filtration / Low Nutrient Systems - LNS' started by Nemos Janitor, 24 May 2011.

  1. Nemos Janitor

    Nemos Janitor

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    What is the relationship between NP bio pellets and sulphur?

    Now i am going to ask some questions that will/might get some thinking.

    How is sulphur produced by NP pellets?

    Can NP bio pellets be used in a denitrator?

    Are NP bio pellets similar to Deniballs?
     
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  3. Achilles

    Achilles

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    They are similar to deniball yes but the difference is deniball is deisgned to be used in an anaerobic enviroment - to create nitrate free water by anaerobic conditions- slow flow - this can result in sulphur smell if too slow and hydrogen sulphide is produced-nitrate is reduced by bacteria using nitrate as an oxygen molecule to eventually make nitrogen gas- this is more for removing nitrate and not phosphate.

    The biopellets are designed to work in a aerobic enviroment by creating a large bacterial biomass that requires an efficient skimmer to skim out the bacteria biomass which have grown by using nitrate and phosphate and the pellets as carbon source- if the flow is too slow you have the pellets creating hydrogen sulphide as well as it goes anaerobic

    a simplified explanation to complex nutrient cycles
     
    Last edited: 24 May 2011
    leslie hempel and Dewald@Dorry like this.
  4. leslie hempel

    leslie hempel Moderator MASA Contributor

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    but a good explination at that ;)
     
  5. Dewald@Dorry

    Dewald@Dorry

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    Oops.. didn't mean to post, sorry Nemos
     
    Last edited: 25 May 2011
  6. Nemos Janitor

    Nemos Janitor Thread Starter

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    @Achilles thank you for the explanation.

    So NP pellets can be used in a denitrator as a food source?
     
    Last edited by a moderator: 26 Nov 2015
  7. Nemos Janitor

    Nemos Janitor Thread Starter

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    Going back to the purpose of NP pellets. Am i correct in understanding that the principle is to create a proper Redfield stoichiometry? If this is the case then it would make sense to have the outlet from the reactor feed the tank and corals.

    I too have been playing around with NP pellets. I have found that the breakdown of the pellets provide food for the corals. So from my experiences nitrates are not completely stripped from the tank.
     
  8. Alan

    Alan Admin MASA Contributor

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    This is a question i raised as well, i have never followed NP pellets but it does appear to me that they achieve the same result as zeolites, with zeolites we feed the system with the waste and excess bacteria.
    What is the difference between the NP pellets and zeolites besides the NP pellets being fluidised.
     
  9. Nemos Janitor

    Nemos Janitor Thread Starter

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    Alan i have never played around with zeolites so i cannot comment.

    But i can say that of the different brands i have tried, the shape of the pellets seems have an influence. The chunky ones dont fluidised as nicely as the round pellet ones. They seem to clog more often.
     
  10. preshan

    preshan <img src="/images/ecrccom.gif">

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    hi alan from my understanding they both do the same thing but zeolites have a limited
    life span +- 6weeks and require a carbon source to be dosed daily , np pellets have a carbon source within the bio pellets and should last a few months.
     
  11. Mekaeel

    Mekaeel Moderator MASA Contributor

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    Not forgetting Zeolites prevents the formation of Nitrates by breaking down Amonia and Nitrites.
     
  12. dallasg

    dallasg Moderator MASA Contributor

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    NP pellets are a carbon based, solid vodka, based media that provide both the space and food for nitrate and phos removing bacteria to live and grow

    zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents, cat litter, but also have special properties when used to filter water, removing of nh4 in freshwater via ionic exchange. they provide a great platform for bacteria to grow on but you still need to suppoly food etc

    yip, they can last for 2 years in freshwater but due to the way we use them in saltwater 6-8 weeks as in saltwater we can only use the bacteria housing properties as the ammonia absorbtion only works in freshwater, they are recharged in saltwater


    true, zeo method removes the cycle completely by not letting it start
     
  13. Alan

    Alan Admin MASA Contributor

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    Okay so they are both used for low nutrient systems, personally i use zeolites but dont feed carbon because IMO that makes the system run too nutrient deficient and i dont have the time to continually feed the corals. My concern with these types of systems is the less experienced reefers could end up with problems while just trying to take a short cut to fighting algae problems.
     
  14. dallasg

    dallasg Moderator MASA Contributor

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    i am using zeolites to replace bio-balls, for bacteria colonisation, thats all
     
  15. Alan

    Alan Admin MASA Contributor

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    Thats exactly how i use mine but i can see the advantages of using NP pellets over zeolites for running low nutrients.
     
  16. Nemos Janitor

    Nemos Janitor Thread Starter

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    I think that there are many ways NP pellets can be used. All depends on what you are trying to achieve. And the type of system. But if the primary object is to reduce nitrates due to heavy fish stocking I am inclined lean towards the denitrator.

    But if you want to feed corals heavily with all the live plankton and rotifiers that are becoming available then NP is the rout to go.
     
    Last edited: 25 May 2011
  17. Achilles

    Achilles

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    I would agree with this, in the coming years im sure more development will happen and eventually we will have systems that run very close to those of reefs.

    One caveat when using np pellets, it can also be source of food for bad bacteria strains to proliferate not only good ones.
     
  18. Nemos Janitor

    Nemos Janitor Thread Starter

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    [​IMG]

    [​IMG]


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    [​IMG]

    The reason i tried to move the NP post was i wanted to know if anyone has tried these brands. and i did not want to upset the sponsor where the threads were on.
     
    Last edited: 25 May 2011
  19. dallasg

    dallasg Moderator MASA Contributor

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    i have used 2 and 4
    so far almost the same for me

    but i am waiting for 2months data etc to be sure
     
  20. Nemos Janitor

    Nemos Janitor Thread Starter

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    I am sure each brand will have its pro's and con's.

    This one i have not seen in this country. But perhaps someone has.

    [​IMG]
     
  21. dallasg

    dallasg Moderator MASA Contributor

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    this one i hear is tops
    BRS
     
    Last edited: 25 May 2011
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