Quick start method for short-range deep denitrification by SBR (Sequencing Batch Reactor) process at low temperature
A technology of deep denitrification and low temperature conditions, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effects of saving additional carbon sources, sensitive response, and saving operating costs
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Embodiment 1
[0034] The SBR short-range deep denitrification quick start process runs continuously for 45 cycles, the SRT is controlled at about 35 days, and the temperature is within the range of 11-17 °C;
[0035] Taking domestic sewage discharged from a university as the research object (pH=7-7.8, COD=160-320mg / L, NH 4 + -N=75-90 mg / L). The test device adopts an effective volume of 7.0m 3 The pilot scale SBR reactor, the water volume per cycle is 2.5m 3 , after the water inflow is completed, the COD concentration of the mixed liquid in the reactor is maintained at 120-240mg / L, and the NH 4 + -N concentration is 20-35mg / L. In the rapid start-up stage of the short-range deep denitrification process, since the pilot-scale SBR reactor is used, the temperature control device cannot be used to control the reaction temperature, and the reactor temperature can only change with the change of the ambient temperature. The time of the rapid start-up phase is the period of transition from wint...
Embodiment 2
[0047] The SBR short-range deep denitrification rapid start-up process runs continuously for 55 cycles, the SRT is controlled at about 30 days, and the temperature is within the range of 11-17°C;
[0048] Taking domestic sewage discharged from a family area of a university as the research object (pH=7-7.8, COD=160-320mg / L, NH 4 + -N=75-90 mg / L). The test device adopts a small-scale SBR reactor with an effective volume of 10L, and the water treatment volume per cycle is 4L. After the water intake is completed, the COD concentration of the mixed liquid in the reactor is maintained at 150-260mg / L, and the NH 4 + -N concentration is 25-45mg / L. In the rapid start-up stage of the short-range deep denitrification process, the temperature is controlled within the range of 11-17°C. The external carbon source is ethanol with a volume fraction of 99.5%. The specific operation steps of each cycle are as follows:
[0049] I use the SBR reactor with an effective volume of 10L for th...
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