Method for culturing denitrogenized granular sludge

Method for culturing denitrogenized granular sludge

  • CN 102,040,281 B
  • Filed: 10/21/2009
  • Issued: 12/31/2014
  • Est. Priority Date: 10/21/2009
  • Status: Active Grant
First Claim
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1. a cultural method for nitrogen removal granule sludge, is characterized in that comprising following content:

  • (1) seed sludge is accessed in aerobic reactor, carry out the enrichment culture of aerobic sludge with high-ammonia nitrogen low C OD waste water, to obtain the aerobic sludge that can tolerate high ammonia nitrogen denitrogenation flora;

    (2) separation screening aerobic denitrifying bacteria from step (1) enrichment flora;

    (3) aerobic denitrifying bacteria of screening in step (2) is carried out domestication to cultivate;

    (4) aerobic denitrifying bacteria that step (3) obtains is inoculated in the aerobic sludge of step (1) carries out nitrogen removal granule sludge cultivation, the nitrogen removal granule sludge of having tamed can be obtained when ammonia nitrogen and nitrogen removal rate reach more than 50%;

    Wherein the enrichment culture of step (1) adopts the mode improving matrix ammonia nitrogen concentration gradually to carry out enrichment, culturing process nutrient solution ammonia nitrogen starting point concentration is 100 ~ 600mg/L, final ammonia nitrogen concentration is 700 ~ 2000mg/L, nutrient solution COD value 100 ~ 1000mg/L;

    When nutrient solution ammonia nitrogen concentration is reduced to below 150mg/L, raising matrix ammonia nitrogen concentration is added carbon source simultaneously and is ensured that nutrient solution COD concentration is not less than 100mg/L, each raising ammonia nitrogen concentration 50 ~ 400mg/L;

    In step (1), seed sludge chooses the active sludge of oil refining or Catalyst sewage treatment plant, and enrichment culture condition is;

    temperature 20 ~ 40 DEG C, pH6.0 ~ 9.0, dissolved oxygen 2mgL -1above;

    Wherein step (4) cultivates the process of granule sludge is that the initial ammonia nitrogen concentration of nutrient solution is 100 ~ 300mg/L, and final ammonia nitrogen concentration is 400 ~ 1500mg/L, and maintaining carbon-nitrogen mass ratio is 1;

    1 ~ 10;

    1;

    When reaction solution ammonia nitrogen concentration is reduced to below 100mg/L, raising matrix ammonia nitrogen concentration is added carbon source simultaneously and is ensured that nutrient solution COD concentration is not less than 100mg/L, each raising ammonia nitrogen concentration 50 ~ 200mg/L;

    Acclimation temperature is 20 ~ 35 DEG C, and pH is 6.5 ~ 10.0, and dissolved oxygen is 0.5 ~ 5mgL -1.

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