53results about How to "To achieve the purpose of phosphorus removal" patented technology

The invention discloses an urban sewage strengthening treatment method in a cold area based on multi-point feed water adjustment, which relates to an urban sewage strengthening treatment method and solves the problems of incapability of synchronous and efficient denitrogenation and dephosphorization, poor treatment effect, high running cost and unsuitability for treating urban sewage in the cold area in the traditional technology of treating the urban sewage. The method comprises the following steps of: firstly, primary precipitation of sewage: dividing effluent of a primary settling tank into two parts or three parts through a distribution well for distribution; and secondly, synchronously introducing the effluent mixing liquid of an anaerobic tank and an anoxic tank 1 and the reflowing sludge at the head end of an aerobic tank into the aerobic tank, introducing the effluent of the aerobic tank into an anoxic tank 2, introducing the effluent of the anoxic tank 2 into a secondary settling tank through water drop, discharging a supernatant as treated purified water, reflowing a part of sludge at the lower layer, and discharging the rest as the remaining sludge. The invention can synchronously carry out efficient denitrogenation and dephosphorization, has favorable treatment effect and low running cost and is suitable for treating the urban sewage in the cold area.

The invention discloses a peracetic acid wastewater treatment system. The system comprises a reaction tank body, a pH value adjuster having a pH value probe and an automatic reducer adding device having an oxidation reduction potential probe, wherein the reaction tank body is divided into a catalytic deoxidization chamber, a chemical reduction chamber and a coagulation-precipitation chamber via a plurality of baffle plates, and the catalytic deoxidization chamber, the chemical reduction chamber and the coagulation-precipitation chamber are communicated in sequence; a water inlet and a water outlet are arranged on the reaction tank body; the water inlet is formed in the side wall of the upper part of the catalytic deoxidization chamber, and the water outlet is formed in the side wall of the upper part of the coagulation-precipitation chamber; a plurality of catalytic filler layers are arranged in the catalytic deoxidization chamber; a liquid outlet of the pH value adjuster is communicated with the catalytic deoxidization chamber; a liquid outlet of the automatic reducer adding device is communicated with the chemical reduction chamber; and both the pH value probe and the oxidation reduction potential probe stretch into the chemical reduction chamber. According to the peracetic acid wastewater treatment system, the strong oxidizing property in peracetic acid wastewater can be reduced, so that the microorganism killing capacity of the peracetic acid wastewater is reduced and the damage from peracetic acid in the wastewater on microorganisms in an anaerobic system or an aerobic system is avoided.

The invention discloses a method for enhancing anaerobic biological dephosphorization of wastewater by coupling microcurrent with biochar, and belongs to the technical field of wastewater treatment; the invention inoculates anaerobic sludge from urban sewage treatment plants into wastewater containing phosphorus to be treated, and then adds Biochar, stir and mix, adjust the pH value of the wastewater, control the current intensity of the reaction system through an external regulated constant current power supply, anaerobic digestion at 15~35°C; phosphorus-containing wastewater is anaerobically digested under the action of biochar coupling micro-current Microbes convert phosphate into gaseous phosphine and escape from the water body, reducing the total phosphorus content entering the subsequent biochemical unit, and significantly improving the biological phosphorus removal effect of the anaerobic-anoxic-aerobic biochemical treatment system. The process of the present invention The process is simple, the cycle is short, and the phosphorus removal effect is obvious.

The invention discloses a novel iron-carbon-medicine stone high-efficiency phosphorus removal particle embedded in sodium alginate, and also discloses a preparation method of the phosphorus removal particle. The phosphorus removal granules include 1-3g of medical stone, 1-3g of activated carbon, 1-4g of sodium alginate, 3-5g of iron powder, 290-310mL of deionized water and 10-25g of calcium chloride. The phosphorus removal particles can not only overcome the disadvantages of easy migration with water flow, easy agglomeration of iron powder and slow phosphorus removal effect of iron-carbon filler when iron, charcoal and medical stone are used alone as carrier fillers, but also give full play to electrochemical, Physical adsorption, chemical flocculation and precipitation, etc. to achieve the purpose of phosphorus removal. In addition, the novel iron-carbon-medicine stone high-efficiency phosphorus removal particles embedded in sodium alginate prepared by the present invention do not require the addition of pore-forming agents and high-temperature roasting, and the preparation method is simple, with low energy consumption, good treatment effect, and wide application range Wide, low cost and other advantages, with high research value and unique application advantages.