Preparation method of high-activity nitrifying bacteria biological membrane for aquaculture water treatment

Abstract

The invention relates to a preparation method of a high-activity nitrifying bacteria biological membrane for aquaculture water treatment. The preparation method comprises the following steps: (1) adding sea sand into aquaculture pond water; (2) adding a nutrient solution; (3) aerating, and controlling the concentration of dissolved oxygen; (4) adding a ferric hydroxide solution; (5) maintaining the ammonia nitrogen concentration at 2-20 mg/L all the time, and maintaining the pH value at 7-9 all the time; (6) adding a suspended carrier according to the concentration of suspended matters except the sea sand in the mixed solution; (7) adjusting the concentration of dissolved oxygen; (8) stopping aeration and taking out the sea sand when more than 20% of the suspended carrier is turned over along with the water flow; (9) starting aeration and maintaining the dissolved oxygen concentration; and (10) when the ammonia nitrogen cannot be detected, completing the preparation of the biological membrane. According to the method, the fixing speed of the nitrifying bacteria biological membrane is increased, and the nitrifying bacteria biological membrane has efficient nitration reaction activity and can quickly remove ammonia nitrogen and nitrite nitrogen in water.

Description

technical field [0001] The invention relates to a preparation method of a highly active nitrifying bacteria biofilm for treating aquaculture water, and belongs to the technical field of nitrifying bacteria biofilm preparation. Background technique [0002] In the process of aquaculture, ammonia nitrogen and nitrite nitrogen are produced by the manure and residual food of aquatic organisms, which pose a threat to the health of aquatic organisms. For the removal of ammonia nitrogen and nitrite nitrogen in water, the microbial method is an economical, feasible, environmentally friendly and efficient method. [0003] The microbial method uses nitrifying bacteria to remove ammonia nitrogen and nitrite nitrogen in water under aerobic conditions, while nitrifying bacteria, as autotrophic bacteria, have a long generation cycle and require harsh growth environments, so they are often unable to compete with heterotrophic microorganisms. gain an advantage. Therefore, when the ammonia...

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Problems solved by technology

[0008] Aiming at the problem that ammonia nitrogen, nitrite nitrogen and other pollutants are difficult to remove in aquaculture ponds and the deficiencies in the existing nitrifying bacteria microbial film preparation technology, the present invention proposes a method that promotes the growth of biofilm nitrifying bacteria, has fast preparation speed and high nitrifying activity. A method for preparing a highly active nitrifying bacteria biofilm for aquaculture water treatment to solve the problem of low removal rate of ammonia nitrogen in aquaculture water

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