The invention relates to an enhanced
nitrogen and
phosphorus removal device and technology for
sewage.The technology comprises the steps that the
sewage is pretreated to enter an anaerobic tank to be subjected to a mixing reaction with
sludge flowing back from a strain separator and then enters the strain separator sequentially through an anoxic tank and an aerobic tank; the strain separator separates strains in mixed liquid, the high-density strains are set to the bottom and flow back to the anaerobic tank through a pump, the low-density strains enter a strain-
algae concerted reaction tank together with
water flow, biological stuffing is arranged in the
concerted reaction tank, the synergistic effect of microalgae and the strains is formed in a
system, part of the microalgae and the strains form an
algae-strain biological film, and then the
nitrogen and
phosphorus removal effect of the
system is enhanced; yielding water is treated through a setting tank and disinfected, and
sludge in the setting tank flows back to the
algae-strain
concerted reaction tank.According to the technology, the problems that when the urban
sewage is treated through an existing A2 / O technology, the
nitrogen and
phosphorus removal effect is poor, and the cost is high are solved.The treatment technology has the advantages of being efficient in treatment, stable in water yielding, low in operation cost and the like and is economical,
environmentally friendly and capable of achieving sustainable cyclic development.