Device and method for recovering nitrogen and phosphorus in sewage and improving biological productivity of microalgae
A technology for microalgae biology and sewage, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. problems, to achieve the effect of saving aeration, reducing energy consumption, and reducing the demand for carbon sources
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[0036] Test water: Sewage from septic tanks in residential areas, the specific water quality indicators are as follows: COD is 192-246mg / L; NH 4 + -N is 67-78mg / L, NO 2 - -N≤0.1mg / L, NO 3 - -N below detection line, PO 4 3- -P is 5.1-7.8 mg / L. test system such as figure 1 shown. Among them, the effective volume of the biological phosphorus removal reactor and the biological denitrification reactor is 10L.
[0037] The specific operation method is as follows:
[0038] (1) First, take the activated sludge rich in phosphorus accumulating bacteria and add it to the biological phosphorus removal reactor 2. After adding, the activated sludge concentration is 3500mg / L. At the same time, the short-range nitrification sludge from the urban sewage plant and the granular sludge enriched with anammox bacteria were added to the biological denitrification reactor 6, and the activated sludge concentration in the reactor was 3000 mg / L after the addition.
[0039] (2) The biological ...
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