The invention relates to a
sewage treatment device and a
sewage treatment method, and is used for treating mixed industrial
sewage taking antibiotic pharmaceutical
wastewater which is hardest to biologically degrade as a primary; the sewage undergoes
nitrogen and
phosphorus removal through mechanical interception, chemical oxidation, multiple biological degradation and chemical
flocculation effects with a grid, a grit chamber, an adjusting primary
sedimentation pool, a modified type inverted AA / O
pool, an aerated
biological filter pool, a
flocculation sedimentation pool and a
sludge concentration pool, and thus a quite good
treatment effect is obtained, and CODcr, NH3-N, TP and other indicators of the
effluent all reach first grade
discharge standards; the method is stable and reliable in
treatment effect and relatively low in operation cost. An improved anaerobic pool, anaerobic pool, aerobic pool and other biochemical reaction pools are each provided with an independent mud-water automatic separation device by self, so that
sludge backflow is eliminated, the
power consumption is relatively greatly reduced, the
sewage treatment cost is reduced, and economy and technology dual advantages are provided. The
coupling method provided by the invention is not easily affected by feedwater
water quality fluctuation and other factors, allows the process to have strong resistance to shock loading, has the characteristics of good
sludge sedimentation performance, no occurrence of a sludge expansion phenomenon and the like, and has a wide application prospect.