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

The invention discloses a novel anaerobic-aerobic integrated reactor. The reactor comprises a reactor body (1). The reactor body (1) comprises an aerobic area (11) and an anaerobic area (12), which are arranged in sequence from top to bottom. The low part of the anaerobic area (12) is connected to a water inlet pipe (3). The upper part of the aerobic area (11) is connected to a water outlet pipe (8). The anaerobic area (12) is provided with a sludge bed (5), a water distribution system (4) is arranged under the sludge bed (5), and the water distribution system (4) is connected to the water inlet pipe (3). A three-phase separation device (2) is arranged between the aerobic area (11) and the anaerobic area (12) and comprises a plurality of three-phase separators. The gas collecting pipes (21) of the three-phase separators are connected to a gas chamber (6). The provided novel anaerobic-aerobic integrated reactor has the advantages of compact structure, reasonable design, and good sewage processing effect, and saves the investment of sewage treatment.

The invention provides a landfill leachate nanofiltration concentrate treatment method. The method comprises the following steps: pumping a landfill leachate nanofiltration concentrate into a reaction tank, adding a coagulant, an antifoaming agent and a flocculating agent into the reaction tank, and reacting; allowing the obtained concentrate to go through a pipeline and flow into a precipitation pool, and carrying out solid-liquid separation to obtain precipitated sludge and a precipitated clear liquid; pumping the precipitated sludge into a dehydrator for separation, sending the generated dehydrated clear liquid and the precipitated clear liquid to a microelectrolysis reactor, and oxidizing; adding an alkali to oxidized water to adjust the pH value to 7-9, sending the obtained water to an ozone reaction tank for further oxidation, and introducing ozone generated by an ozone generator into an ozone reaction tank for aeration; and returning the treated nanofiltration concentrate to a biochemical system. The method ingeniously combining a physical and chemical reaction with a biochemical technology has the advantages of stable running, easy operation and maintenance, low running cost and high treatment efficiency, and partially solves the carbon source insufficiency problem of landfill leachate.

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.

The present invention discloses a system for strengthening a post-denitrification denitrogenation process. The system comprises a landfill gas inlet pipe, a nitrification strengthening tank (IN tank), a deaerator, a denitrification strengthening tank (ID tank) and a sedimentation tank, wherein the IN tank adopts landfill gas to aerate, the ID tank adopts the landfill gas with the oxygen removed by the deaerator to aerate, the length of the IN tank aeration pipe extending into the IN tank is 2 / 3 of the length of the tank, the IN tank and the ID tank are separated by a separation wall, the distance between the separation wall and the tank bottom is 1 / 5 of the height of the tank, the mixed ratio of the landfill gas to the air in the IN tank is 2:1-4:1, the internally circulated gas ratio in the IN tank is 50-80%, the internally circulated gas ratio in the ID tank is 70-90%, and the pre-acclimatization times of the microorganisms in the IN tank and the ID tank are 3-5 d. The system of the present invention has characteristics of high denitrogenation efficiency, stable treatment effect, simple process, less treatment structure and equipment, low infrastructure construction and operation cost, and the like.

The invention discloses a preparation method and application of an external carbon source for denitrification, and belongs to the technical field of solid organic waste treatment and utilization and water treatment. The invention adopts struvite precipitation + calcium phosphate precipitation combination process to recover nitrogen and phosphorus in cyanobacteria anaerobic fermentation liquid, and the treated cyanobacteria anaerobic fermentation liquid can replace traditional commercial carbon source as an additional carbon source in the denitrification process , not only can provide a carbon source for the denitrification process, but also can significantly improve the denitrification capacity of sewage compared with commercial carbon sources. The operating cost of the sewage treatment plant turns "waste" into "treasure", killing two birds with one stone.

The invention relates to a continuous-flow AAO dephosphorization and partial denitrification series composite fixed biofilm activated sludge autotrophic denitrification device and a method thereof, which belong to the technical field of urban sewage biological treatment. The main body of the process is composed of four parts: urban sewage raw water tank, continuous flow AAO dephosphorization partial denitrification device, intermediate water tank and composite fixed biofilm-activated sludge autotrophic denitrification device. Through process adjustment, the remaining short-path sludge in the back-end autotrophic denitrification reactor is continuously refluxed through the sludge circulation system under the condition that the basic characteristics of the main organism population phosphorus accumulating bacteria in the AAO reactor are not destroyed. to the AAO reactor. Therefore, the denitrification effect of the front and rear stages can be realized at the same time, and the reactor volume required for treating unit volume of waste water can be further reduced. At the same time, under the conditions of high temperature, low oxygen and low sludge age, NOB in the autotrophic denitrification reactor can be effectively elutriated, making the short-range effect more stable. Finally, the energy-saving, efficient and stable nitrogen and phosphorus removal of the system will be realized.