A method for deep carbon and nitrogen removal by treating sludge digestate from urban sewage plants using semi-short-cut nitrification-anammox-electro-oxidation
A technology of anaerobic ammonium oxidation and semi-short-cut nitrification, which is applied in the field of advanced treatment of sludge digestion liquid, can solve the problem of high cost of carbon source and achieve the effect of reducing treatment cost
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[0038] Combined example: the experimental water is taken from the untreated sludge digestion solution of a sewage treatment plant in Beijing, and its water quality is as follows: CODcr is 2800-3000mg L -1 , NH 4 + -N is 2000-2500mg·L -1 , NO x - -N is 0.1-5mg·L -1 , TN is 2900-3100mg·L -1 , TP is 20-40mg·L -1 .
[0039] Routine water quality indicators are determined by national standard methods. TN and TOC etc. adopt TN / TOC analyzer (Multi N / C3000, Jena, Germany).
[0040] Such as figure 1 Shown, the concrete steps that the present invention handles sludge digestate separately are as follows:
[0041] 1) The sludge digestion liquid passes through the outlet pipe (2) from the inlet water tank (Ⅰ) compartment (1), and is pumped into the SBR (Ⅱ) inlet pump (3) and SBR (Ⅱ) inlet pipe (4) In the SBR (II), the volume of the incoming water is 10%-50% of the effective volume of the SBR (II), and each operation cycle of the SBR (II) is: the raw water passes from the inlet c...
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