Largest nitrite accumulation method in denitrification process
A nitrite and denitrification technology, applied in anaerobic digestion treatment and other directions, can solve the problems of long start-up time, easy to be destroyed, complicated control process, etc., to achieve short start-up time, high nitrite accumulation, nitrite The effect of high accumulation rate
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[0025] Combined with specific experimental examples, this method is further explained:
[0026] The SBR reactor was used to carry out the experiment of nitrite accumulation in the process of denitrification. The effective volume of the reactor was 10L; each cycle of the SBR reactor included water intake for 6 minutes, anoxic stirring for 35 minutes, precipitation for 20 minutes, and then the supernatant was discharged. 50%.
[0027] Specifically include the following steps:
[0028] (1) Inoculate the sludge in the primary sedimentation tank, and control the concentration of the influent sludge at 2000-4000mg / L.
[0029] (2) After the nitrate wastewater enters the denitrification reactor, adjust the pH value in the reactor to 9-9.5, and then add sodium acetate to make the system's initial COD / NO 3 - -N is between 2.5 and 3.5;
[0030] (3) Anoxic stirring, the specific time is set as follows: in the first cycle, measure the NO in the reactor every hour after the stirring sta...
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