5results about How to "Improve nitrification capacity" patented technology

The present disclosure discloses an efficient AOA coupled anammox sewage treatment method and system based on BFM form, relating to the field of sewage treatment technology. The method includes: the sewage to be treated enters the anaerobic zone and then enters the carbon migration zone; the supernatant obtained in the carbon migration zone enters the aerobic pure film MBBR zone, the sludge obtained is discharged from the bottom of the carbon migration zone, and then transported to the selection zone through a pipeline connected to a sludge bypass pump. The effluent from the aerobic pure film MBBR zone enters the selection zone, anoxic IFAS zone, and secondary sedimentation zone in sequence. The method of the present disclosure achieves the operation status of pure film MBBR in the aerobic zone by setting the carbon migration zone, avoiding the problem of carbon loss of activated sludge in the aerobic zone. In addition, adding suspended carriers to collect anammox bacteria in the anoxic IFAS zone can reduce the dependence of denitrification on the carbon source of the raw water, and achieve high standard discharge of effluent nitrogen. The system HRT is reduced by more than 40% compared to the traditional activated sludge method, and the minimum HRT is less than 10 hours.

The present invention relates to a tailwater artificial wetland treatment system and method for enhanced denitrification and phosphorus removal, which comprises a pre-pond, a micron aerated vertical submerged flow wetland, a vertical submerged flow wetland, a horizontal submerged flow wetland and a stabilization pond arranged in sequence; an immersion bioreactor is arranged in the pre-pond, an integrated air / water distributor is arranged at the bottom of the micron aerated vertical submerged flow wetland, a calcareous centimeter stone and a slow-release carbon source composite functional filler are arranged in the vertical submerged flow wetland, and a slow-release carbon source composite functional filler and a sulfur iron functional filler are arranged in the horizontal direction in the horizontal submerged flow wetland. The system first performs preliminary purification, and then performs heteroaerobic denitrification and autoaerobic denitrification in deep purification, and simultaneously enhances phosphorus removal. It has the advantages of reasonable structural design, uniform water distribution and water collection, strong synchronous denitrification and phosphorus removal capabilities, and good winter operation effects, and significantly improves the denitrification and phosphorus removal capabilities and self-repair capabilities of the tailwater artificial wetland system, and has the advantages of ecological naturalness, high efficiency and stability, simple maintenance, and economical and practical.

The invention relates to the technical field of rural sewage and organic chemical engineering sewage treatment, in particular to a rural sewage and organic chemical engineering sewage comprehensive treatment method which comprises the following steps: pretreating rural sewage and organic chemical engineering sewage by using an aerated grit chamber; the rural sewage and the organic chemical sewage treated by the aerated grit chamber enter a grating tank to be treated; the rural sewage and the organic chemical sewage treated by the grating tank sequentially enter an anaerobic tank, an anoxic tank and an aerobic tank to be treated; the rural sewage and the organic chemical sewage treated by the aerobic tank enter a membrane bioreactor to be treated; the rural sewage and the organic chemical sewage treated by the membrane bioreactor enter the reverse osmosis mechanism to be treated. According to the invention, the sewage treatment efficiency is improved, efficient purification and resource utilization of sewage are realized by reducing pollutant discharge, natural water is protected from being polluted, and virtuous circle of ecological environment is promoted.

This invention provides a tidal flow constructed wetland for treating rural domestic sewage, comprising a concrete impermeable layer disposed at the bottom and around the perimeter of the pool. Within the concrete impermeable layer, from bottom to top, are a uniformly distributed water pipe layer, a first filler layer, a second filler layer, a third filler layer, and a covering layer. One end of the uniformly distributed water pipe layer has an inlet pipe, and the bottom of the third filler layer has an outlet pipe. An aeration pipe is also located within the third filler layer. Wetland plants, preferably local dominant wetland plant species, are planted on the covering layer. The first filler layer is a mixture of slow-release carbon source and alkali source, the second filler layer is a mixture of sulfur and iron, the third filler layer is a filter adsorption filler, and the covering layer is gravel filler. This invention offers advantages in treating rural domestic sewage, including good purification effect, simultaneous nitrogen and phosphorus removal, siphon self-control, low infrastructure and operating costs, and convenient maintenance.

The invention relates to the technical field of environmental protection and sewage treatment, and discloses a method for rapidly and stably starting autotrophic nitrification. The method comprises the following steps: (1) pretreating nitrobacterium-containing sludge with the sludge concentration of 3-20g / L, and stopping when the sludge concentration is reduced by not more than 5% and / or the organic matter concentration is increased by not more than 5% to obtain pretreated sludge; and (2) contacting the pretreated sludge with sewage to be treated to start autotrophic nitrification to obtain effluent. The method provided by the invention not only can realize quick start and stable operation of autotrophic nitrification, but also can avoid the problems of intensified membrane pollution, poor settling performance, deteriorated effluent quality, complicated operation, difficult management and the like caused by high sludge concentration, and can effectively improve the nitrification performance of nitrifying bacteria of an autotrophic nitrification system; and a technical support can be provided for recycling of nitrogen elements in the sewage.