50results about How to "Increase nitrification" patented technology

The invention relates to a method for treating high-concentration organic wastewater by anaerobic-aerobic deep coupling. The method comprises the following steps: introducing organic wastewater into an anaerobic reaction unit, and sufficiently mixing the organic wastewater with anaerobic granular sludge added into the anaerobic reaction unit in advance to perform anaerobic reaction; enabling anaerobic effluent obtained after anaerobic reaction to enter an aerobic reaction unit, and removing nitrogen through a synchronous nitrification and denitrification process; flowing part of effluent of the aerobic reaction unit back to the anaerobic reaction unit and fully diluting and mixing the part of effluent with the raw organic wastewater and granular sludge to carry out anaerobic reaction, andenabling the other part of effluent to enter a next treatment process or discharging the other part of effluent after reaching the standard. According to the invention, the anaerobic and aerobic reaction units are coupled to treat wastewater; anaerobic effluent enters the aerobic unit, the DO value in the water body of the aerobic unit is controlled, denitrification is effectively completed, thereflux ratio of the aerobic effluent is controlled, and the aerobic effluent returns to the anaerobic unit again, so that the ammonia nitrogen concentration in the anaerobic reactor is reduced, the activated sludge amount in the anaerobic reactor is ensured, and the anaerobic reaction efficiency is effectively improved.

The invention relates to an enhanced ecological wetland treatment facility for treating sewage and a method thereof. A sedimentation tank is used to remove floating objects and settleable suspended matters from the sewage; a water body treated by the sedimentation tank is uniformly distributed on a vertical flow filter bed of a vertical flow and horizontal flow combined filter bed through a waterdelivery and distribution system; the effluent enters a horizontal flow filter bed of the vertical flow and horizontal flow combined filter bed through a water collecting pipeline; after the pollutedwater body is biochemically treated by the vertical flow filter bed and the horizontal flow filter bed, the water body enters a secondary ecological wetland through the water collecting pipeline and is discharged into a natural water body after being purified; and the settled sludge in the sedimentation tank is discharged into a sludge drying bed and then is stabilized, and a percolate reflows tothe sedimentation tank for re-treatment. The method for treating the polluted water body by combining the sedimentation tank, the vertical flow horizontal flow filter beds and the sludge drying bed not only effectively treats the polluted water body, but also solves the problem of sludge disposal with low cost, and is suitable for the treatment of rural domestic sewage, city landscape water, polluted water bodies of rivers and lakes and the like.

The invention relates to a method for processing reverse osmosis concentrated water by a catalyzed internal electrolysis and modified biological aerated filter. The method comprises the following steps: 1) performing catalyzed internal electrolysis pre-processing: regulating a pH value of wastewater, and removing organic substances in concentrated water through iron-carbon internal electrolysis reaction; 2) performing two-stage biological filter biological membrane processing: after performing coagulating sedimentation on catalyzed internal electrolysis outlet water, introducing the catalyzed internal electrolysis outlet water into a two-stage biological filter (a denitrification biological filter and an aeration biological filter) to further remove organic substances and ammonia nitrogen in the concentrated water. The method is high in processing efficiency, low in operation cost and capable of effectively removing organic substances which have toxic action to human health and an ecological environment in the concentrated water and improving wastewater biodegradability; the improved aeration biological filter can be suitable for characteristics of high hardness, high alkalinity, high sulfate and the like of the RO concentrated water, so that the water quality of the outlet water meets emission needs and a novel way for processing the reverse osmosis concentrated water is provided.