Denitrification purification method for marine culture wastewater
A technology of mariculture and denitrification, applied in the direction of anaerobic digestion treatment, etc., can solve the problems of high cost of denitrification, secondary pollution, complex operation of the system, etc.
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[0014] a. Take the sludge at the bottom of the sedimentation tank in the seawater circulating water fish farming system, and make the hydrolyzed sludge through anaerobic cultivation and training. The specific steps are to take the black flocculent sludge at the bottom of the sedimentation tank in the seawater circulating water fish farming system, Repeatedly wash with tap water until the supernatant is clear, discard the supernatant, take the sludge and the total solids of mariculture wastewater (TS content is 882g / L) and mix them at a volume ratio of 1:4~6, and then use 0.1~0.2mol / L Adjust the pH value of the mixture to 5-6 with NaOH, put it into a stirrer, and cultivate it anaerobically at 20±2°C for 25-35 days;
[0015] b. Take the hydrolyzed sludge into the reactor and add the culture medium at a volume ratio of 1:3~5. The composition of the culture medium is: NaNO 3 500mg / L, methanol 1250mg / L, NaH 2 PO 4 1250mg / L and Na 2 HPO 4 10mg / L, use 0.4~0.6mol / L NaOH to adju...
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