34results about How to "The treatment effect is thorough" patented technology

The invention discloses a wastewater reuse method combining magnetic loading coagulation clarification and membrane separation. The method comprises the following steps: (1) a coagulant is added into a reaction tank to form small flocs; (2) the small flocs enter a loading and mixing tank to generate magnetic coagulation cores with magnetic carriers; (3) after the magnetic coagulation cores enter a flocculation tank, a flocculant is added to generate large-particle magnetic floccules; (4) after the magnetic floccules are stirred and dispersed strongly by a high-speed dispersion machine, magnetic carriers which are recycled via a magnetic drum separator return to the step (2), supernatant liquor enters a middle water tank via the collection by a water collecting pipe, after being pressurized by a water pump, the supernatant liquor enters membrane separating equipment for fine filtration, and filtered water is discharged for reusing. The method is used for removing particulate matters, colloid and a part of dissolved organic matters in advance before membrane filtration, so that membrane pollution degrees can be effectively avoided or reduced, and the cleaning period and the service life of membrane components are increased. The method can be used for the resource reutilization of the wastewater in industries of printing and dyeing, electroplating, paper-making and the like, as well as the upgrading and reconstruction and the tail water reuse of sewage treatment plants.

The invention discloses a circular-oxygenation biochemical device which comprises a biochemical reaction tank, wherein the biochemical reaction tank is provided with a water inlet, a decanting device and a sludge discharge port, and an aerating system is laid on the bottom; a guide system and a grid plate are fixedly arranged in the biochemical reaction tank; the guide system comprises suspended guide plates and a top hood; the guide plates are arranged along the upstream and downstream direction; the two guide plates in each pair are faced with each other, and the distance becomes larger from top to bottom; the cross section of the top hood is in an inverted V shape, the top hood is covered above the guide plates, and the top end of each guide plate is positioned in the lower edge of the top hood; the grid plate is arranged in the direction perpendicular to the upstream and downstream direction, and positioned on the downstream of the guide plates; and sewage enters the biochemical reaction tank through the water inlet and is aerated by the aerating system to obtain the mixed solution, the mixed solution is stood to precipitate, and the upper water is flocculated by the regenerant on the grid plate and discharged out of the biochemical reaction tank through the decanting device. The circular-oxygenation biochemical device has the advantages of more thorough biochemical reaction, more sufficient precipitation and higher effluent water quality.