Advanced nitrogen removal method for municipal sewage
A technology for deep denitrification and urban sewage, applied in water/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve the problem of low limestone dissolution rate, improve effluent water quality, and improve denitrification effect Effect
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[0024]Example 1
[0025]A deep denitrification method for urban sewage, which will go through A2The sewage treated by the O biological denitrification process is subjected to a sulfur autotrophic deep denitrification process, where the filler used in the sulfur autotrophic deep denitrification process is egg shells or a mixture of shellfish shells and elemental sulfur, in which egg shells and elemental sulfur The mass ratio of shellfish shell to elemental sulfur is 1.1:1; the mass ratio of shellfish shell to elemental sulfur is 1.05:1.
[0026]The above technical solution uses egg shells or shellfish shells instead of commonly used limestone as alkaline substances to dissolve carbonates, and neutralizes elemental sulfur as electron acceptors to generate hydrogen ions after denitrification reaction, so that sulfur autotrophic deep denitrification process The pH of the mid-environment is always maintained within the suitable pH range for the growth of Thiobacillus denitrificans.
[0027]It sho...
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