Low carbon nitrogen ratio micro contaminated water nitrogen removal method
A technology with slightly polluted water and low carbon-to-nitrogen ratio, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low proliferation rate of autotrophic microorganisms and long hydraulic retention time HRT , sulfur consumption and other problems, to achieve the effect of reducing excessive sulfate ion content, short breeding time, and strong anti-interference ability
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[0021] Concrete steps of the present invention are as follows:
[0022] 1) Place composite denitrification filler in layers in the upward flow reactor (see attached picture), the composite denitrification filler is sulfur / limestone / forest waste, the volume ratio is 1:0.2~0.5:0.5~2, specifically sulfur The volume ratio of limestone / wood residue is 1:0.2:0.5, 1:0.2:1, 1:0.2:2, 1:0.5:0.5, etc.
[0023] The sulfur is melted and molded, and processed into a small cylinder with a bottom diameter of about 1-1.5 cm and a height of about 1-1.5 cm. The limestone is crushed into granules with a volume roughly equivalent to that of sulfur granules. Forest waste is discarded in forestry production. shavings, plant residues, etc.
[0024] 2) Start the first stage, inoculate the filler with anaerobic sludge equal to the volume of the filler, set the start-up HRT to 8 h, pump the raw water into the upward flow reactor, and continuously feed Thiobacillus denitrification The medium was used t...
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