4 results about "Nitrogen removal" patented technology

The invention discloses an integrated double-circulation oxidation ditch device for town sewage and a treatment method. The integrated double-circulation oxidation ditch device comprises an anaerobic zone, an anoxic zone, an aerobic zone and a secondary sedimentation tank which are communicated in sequence, the anoxic zone comprises a first anoxic zone and a second anoxic zone; the aerobic zone comprises a first aerobic zone and a second aerobic zone, and a reflux pump is arranged between the anoxic zone and the aerobic zone. The anaerobic zone, the anoxic zone and the aerobic zone are internally provided with submersible stirrers, and the anoxic zone and the aerobic zone are respectively provided with a partition wall and a guide wall to form circulation in each zone; and the synchronous denitrification and phosphorus removal effect of nitrate nitrogen is realized in the anoxic zone, so that the purposes of stably removing organic pollutants COD and removing nitrogen and phosphorus are achieved, the COD removal effect is improved, and the nitrification and denitrification nitrogen removal and phosphorus removal efficiency is improved. The integrated structure of the device has the characteristics of simple structure operation and low cost, and the investment and operation cost can be further reduced.

The invention discloses an ultrahigh-filtering-speed IV-class water upgrading standard transformation nitrogen and phosphorus removal device and a treatment process thereof. The device is formed by sequentially connecting an inner water inlet pore plate grid, an ultrahigh-filtering-speed nitrogen removal biological filter, an ultrahigh-filtering-speed dense medium loading efficient flocculation clarification tank and a clean water tank in series. According to the invention, the problem that a filter head of a traditional aerobic nitrification biological filter is easy to block due to fibrous impurities is solved, the problems of blockage, low filtering speed, high treatment load and low treatment load of an upward flow denitrification biological filter are solved, and the treatment effectof the dense medium and dense medium loaded efficient flocculation clarification tank is obviously superior to that of a traditional combined treatment device and process; the traditional process problem of efficient nitrogen and phosphorus removal is solved, the sewage containing high nitrate and inorganic phosphate can be deeply upgraded, the effluent can reach the IV-class water standard, and the method has great popularization and application value for sewage upgrading.