Zero-valent iron polyculture denitrification coupling modified charcoal two-stage PRB underground water denitrification method and reactor
A technology of biochar and denitrification, applied in chemical instruments and methods, biological water/sewage treatment, polluted groundwater/leachate treatment, etc., can solve the problems of low efficiency, slow growth rate of ferroautotrophic denitrifying Nitrogen efficiency decline and other issues
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[0031] This embodiment provides a zero-valent iron polyculture denitrification coupling modified biochar two-stage PRB groundwater denitrification method and denitrification reactor, the groundwater NO in this embodiment 3 - -N concentration is 25 ± 5.0mg / L, denitrification is carried out through a two-stage PRB groundwater denitrification method provided by this embodiment with zero-valent iron polyculture denitrification coupled with modified biochar, including the following steps:
[0032] Step 1): Set Fe wrapped in polyethylene mesh bag in the primary PRB reaction zone 0 (Iron shavings) filler, use the residual sludge of urban sewage treatment plant as seed sludge, and inoculate it into the first-level PRB reaction zone. Contains NO 3 --N groundwater is fed continuously for 10-15 days to form a biofilm with denitrifying bacteria on the surface of the iron shaving filler and complete the start-up of the first-level PRB.
[0033] Step 2): With NO 3 - -N groundwater ent...
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