45results about How to "Short startup cycle" patented technology

The invention discloses a method for fast starting H. hydrossis dominant filamentous fungus sludge slight expansion under the condition of low C / N ratio domestic sewage and relates to the field of sewage biological treatment. The reactor structure is characterized in that a volume ratio of an anoxic zone to an aerobic zone is 1: 1.5-1.2.0, the anoxic zone is divided into 1-2 grids and the aerobic zone is divided into 2-3 grids. Domestic sewage enters into the anoxic zone, then is fed into the aerobic zone, then is fed into a secondary sedimentation tank from the last grid of the aerobic zone and then is subjected to sludge-water separation, and the supernatant is discharge finally. The method comprises two cycles of sludge reflux (comprising that the settling sludge in the secondary sedimentation tank is refluxed to the first grid of the anoxic zone according to a reflux ratio of 80-120%) and inner reflux (comprising that a nitrated liquid is refluxed to the first grid of the anoxic zone from the last grid of the aerobic zone according to a reflux ratio of 120-180%). The method utilizes the low C / N ratio domestic sewage as inlet water, realizes fast starting of H. hydrossis dominant filamentous fungus sludge slight expansion, improves synchronous nitrification-denitrification and shortcut nitrification of the system, improves pollutant removal effects and saves aeration energy consumption.

The invention relates to the technical field of biological filter materials, in particular to a preparation method of a fast-starting denitrification and phosphorus removal type filter material. The preparation method of the fast-starting denitrification and phosphorus removal type filter material, the steps include: sieving concrete block waste; preparing Thiobacillus denitrification bacteria suspension, soaking the concrete block waste and drying naturally; , heavy calcium powder, pyrite, lime, and gypsum are crushed and sieved according to the weight percentage to obtain a premix; the concrete block waste ball is used as a core, and the premix is ​​used as an outer coating for granulation, and the core is Roll coating the premixed material to obtain raw material balls; autoclaving them to obtain a nitrogen and phosphorus removal type filter material that can start quickly. The invention provides a method for preparing a quick-start denitrification and dephosphorization type filter material, which effectively recycles the autoclaved aerated concrete block waste and makes a high value-added denitrification and dephosphorization filter material, The start-up period is short, the additional amount of carbon source is reduced, and it has high economic and environmental benefits.