37results about How to "Solve the problem of insufficient carbon sources" patented technology

The invention provides a method for advanced denitrification and dephosphorization through an aerobic phosphorus uptake and half shortcut nitrification coupled anaerobic ammonia oxidation double-granule sludge system, belonging to the field of biological sewage treatment. The system comprises a raw municipal sewage tank, an A / O-SBR reactor, an Anammox-SBR reactor, a PLC control box and a computer. The method comprises the following steps: firstly allowing municipal sewage to enter the A / O-SBR reactor, carrying out anaerobic phosphorus release reaction, and controlling DO to be less than 0.2 mg / L; after the reaction is completed, starting aeration, then carrying out aerobic phosphorus uptake and half shortcut nitrification, controlling nitrification process through the output of the computer; after the reaction is completed, carrying out standing and sedimenting, allowing drained water to enter the Anammox-SBR reactor, and carrying out anaerobic ammonia oxidation reaction; and after the reaction is completed, carrying out standing, sedimenting and draining, then collecting concentrations of effluent ammonia nitrogen and nitrite nitrogen, and adjusting reaction time according to the concentrations. The method provided by the invention gives full play to the advantages of granule sludge and autotrophic denitrification; and through online real-time control, system operation is optimized; degree of automation is high; controllability is good; and advanced denitrification and dephosphorization of low C / N domestic sewage can be realized.

The invention relates to a device and a method for realizing deep denitrification of domestic sewage by synchronous nitrification and denitrification combined with short-range denitrification and anammox with intermittent aeration, and belongs to the field of sewage biological treatment. The device includes excess sludge fermentation tank, mud-water separator, raw water tank, intermediate water tank, two sequencing batch SBR reactors, air compressor, peristaltic pump, etc. The method is to add domestic sewage into the first sequence batch reactor, and remove all ammonia nitrogen and most of the total nitrogen through synchronous nitrification and denitrification under the intermittent aeration mode; In the second-sequence batch reactor, the remaining nitrite and nitrate are removed through short-range denitrification coupled with anaerobic ammonium oxidation, and finally realize the deep denitrification of domestic sewage. The invention is suitable for low C / N urban domestic sewage, can reduce aeration, reduce energy consumption, homogenize the concentration of organic matter in domestic sewage, slow down the consumption speed of organic matter, improve the efficiency of denitrification, and realize resource utilization of excess sludge at the same time.

The invention relates to a sewage treatment system, which comprises a grid for filtering suspended substances and impurities in the sewage, a sand sedimentation pond used to separate the sediment and inorganic granules in the sewage, a middle sedimentation pond and an absorption pond used to absorb the contaminations in the sewage; wherein the grid and the sand sedimentation pond are connected each other to perform the pretreatment of the sewage, the absorption pond and the middle sedimentation pond are connected each other to perform absorption sedimentation treatment of the contaminations in the sewage; the invention is characterized in that: the sewage treatment system also comprises an anoxic pond and an aerobic pond that are connected each other, the aerobic pond is added with biological fillings, entire system solves effectively the problem of inadequate carbon source when denitrifying in the original AB water treatment system, thereby enhancing the effect of removing total nitrogen, moreover the invention has convenient management, no needing frequent maintenance, no needing frequent process parameter adjustment according to sludge retaining time and sludge concentration.

The invention discloses an authigenic ferric salt chemical phosphorus removal-anaerobic ferrous oxidization biological denitrification integrated device. The device is provided with a chemical flocculation settling area, a ferrous salt supplement area, a nitrogen and phosphorus removal area and a three-phase separation area from bottom to top, wherein the chemical flocculation settling area is provided with a solid-liquid separation phosphorus removal area and a slowly flocculating phosphorus removal area, the ferrous salt supplement area is provided with a zero-valent iron filling area, the nitrogen and phosphorus removal area is provided with a rapidly settling phosphorus removal area and a ferrous oxidization biological nitrogen removal area from inside to outside, the three-phase separation area is provided with a gas release area and a settling area, and the settling area is provided with a biological sludge discharge port, a reflux port, an overflow weir and a water outlet. According to the device, the matrix of the phosphorus removal process and the nitrogen removal process can be recycled; by using biological denitrificatio and authigenic ferric salt chemical phosphorus removal agent, the cost for removing phosphorus is lowered; zero-valent iron such as cheap iron residue / scrap iron is dissolved by acid ferric salt phosphorous removal reaction solution so as to provide ferrous salt matrix for biological denitrification, and the purpose of processing waste with waste is achieved; by using autotroph for denitrification, the problem of insufficient carbon source in biological denitrification of wastewater is effectively solved.