86results about How to "Efficient nitrogen and phosphorus removal" patented technology

The invention discloses a power-free integrated constructed wetland waste water treatment technology. The technology is characterized in that a vertical-flow waste water ecological purifying tank is divided into an upper region and a lower region; a waste water pre-treatment system is one or more pre-treatment processes of a grid, a three-grid type settling tank and an anaerobic tank, living waste water after the pre-treatment enters a water distribution system by being lifted by a water pump or relying on the natural liquid level height difference; the waste water after the pre-treatment is evenly distributed on a nitrification region of the vertical subsurface flow ecological purifying tank through a cross water distribution pipe network and is sequentially vertically penetrated in the nitrification region and an artificial matrix layer of a denitrification region; the water distribution system implements intermittent water distribution for the ecological purifying tank and is provided with a power-free gas distribution system at the bottom and in the upper nitrification region for realizing the continuous oxygen restoration of the nitrification region; outlet water of the upper nitrification region directly enters the lower denitrification region; a water collecting and water outlet system is arranged in the lower denitrification region, a water collecting port is arranged below the denitrification region, and a water outlet is arranged above the denitrification region, thereby leading the outlet water to maintain a certain water level in the denitrification region. The technology can realize the power-free natural oxygen restoration of the wetland, occupy small area and realize the nitrification-denitrification integrated high-efficient nitrogen removal.

The invention discloses a sewage treatment process and a special-purpose one-piece sewage treatment plant. The process comprises the following steps: 1) arrangement of a water inlet system: sewage input from an inlet pipe and pretreated by thick and fine gratings and a vortex-type grit chamber is sent into a biological reaction system; 2) arrangement of the biological reaction system: the biological reaction system is divided into an anoxic area, an anaerobic area, an aerobic area and a sedimentation area, and activated sludge in each area utilizes katabolism of microbes to converse organic matters into inorganic matters to realize nitrogen and phosphorus removal; 3) arrangement of the sedimentation basin: sludge and water in the treated sewage can be separated, so that the water outlet is clarified; and 4) arrangement of a disinfection tank: the treated water from the step 3) is disinfected to kill pathogenic organisms and then discharged through an outlet pipe. The invention also discloses a one-piece sewage treatment plant. The invention has the advantages of small land occupation, small investment, compact mechanism, low loss of a water head, low investment for the engineering project, optimized, stable and mature technology, good nitrogen and phosphorus removal effect and good organic pollutant removal effect.

The invention discloses a device and method for treating low-carbon urban sewage through synchronization of anaerobic ammonia oxidation coupling denitrifying phosphorus removal and endogenous denitrification, and belongs to the field of biological sewage treatment. Urban sewage enters an endogenous denitrification coupling dephosphorization SBR reactor for anaerobic stirring, energy is provided for glycogen inside denitrification glycogen-accumulating organisms decomposition cells, volatile fatty acid VFA in sewage is absorbed for synthesizing an internal carbon source PHA to be stored into the body, meanwhile, the denitrification phosphate-accumulating organisms are subjected to anaerobic phosphorus release, and VFA in the sewage is absorbed for synthesizing PHA to be stored into the body; after anaerobic stirring is finished, precipitation and drainage are performed, outlet water is drained into a middle water tank; then, water containing ammonia nitrogen and phosphate in the middle water tank is made to enter an integrated partial nitrification anaerobic ammonia oxidation SBR reactor, intermittent hypoxia aeration stirring is performed, and water is drained and drained into a water outlet tank; the outlet water of the integrated partial nitrification anaerobic ammonia oxidation SBR reactor is made to enter the endogenous denitrification coupling dephosphorization SBR reactor for hypoxia aeration stirring. According to the method, organic carbon sources in raw water are efficiently utilized, and the aeration rate is saved.

The invention discloses an efficient nitrogen and phosphorus removal method for sewage properties-classified treatment in a highway service area. The efficient nitrogen and phosphorus removal method includes that toilet flushing sewage in the highway service area flows into a septic tank to be treated, the sewage in the septic tank sequentially flows through an adjusting tank (1), a nitration tank (1), a settling tank (1), a denitrification tank (1), a denitrification tank (2), a nitration tank (2) and a settling tank (2), and when effluent in the settling tank (2) reaches the standard, the effluent is discharged; simultaneously, catering sewage flows into an oil separation tank to be treated, and the sewage in the oil separation tank flows into an adjusting tank (2); the catering sewage and the toilet flushing sewage share the denitrification tank (1) and the denitrification tank (2), and the treatment method of the catering sewage flowing into the denitrification tank (1) or the denitrification tank (2) is identical to that of the toilet flushing sewage flowing into the denitrification tank (1) or the denitrification tank (2); simultaneously, other sewage flows into the adjusting tank (1) or the adjusting tank (2); if the other sewage flows into the adjusting tank (1), the treatment method of the other sewage flowing into the adjusting tank (1) is identical to that of the toilet flushing sewage flowing into the adjusting tank (1); and if the other sewage flows into the adjusting tank (2), the treatment method of the other sewage flowing into the adjusting tank (2) is identical to that of the catering sewage flowing into the adjusting tank (2).

The invention belongs to the technical field of environmental protection, and particularly relates to a preparation method of an algae biofilm and application thereof in sewage treatment. The preparation method specifically comprises the steps of carrier pretreating, algae culturing, algae domesticating and algae biofilm preparing. The preparation method of the algae biofilm has the advantages that the preparation cost is low, the raw materials are easy to obtain, and the algae biomass is easy to recycle; the prepared algae biofilm can achieve the efficient nitrogen and phosphorus removal effect in sewage treatment, achieves the purpose of general sewage treatment and not only can overcome the defects that in a suspended algae system, the algae density is low, the hydraulic retention time is long, algae and water are difficult to separate, too more suspended solids (SS) exist, the resource recycling rate is low but also has the advantages of reducing immobilization reagent cost, weakening the influences of immobilization reagents on the algae activity, reusing immobilization carriers and the like.

The invention provides a sewage treatment method based on an improved A2O process, belonging to the technical field of sewage treatment. The method concretely comprises the steps of enabling sewage tosequentially pass through an anaerobic pool, an anoxic pool, an aerobiotic pool and a secondary sedimentation tank; mixing reflux mixed liquid in the aerobiotic pool with inlet water of the anaerobicpool, and then enabling the mixed liquid to enter the anaerobic pool for treating; inoculating the anaerobic pool with domesticated anaerobic sludge. Total nitrogen is removed by means of a combinedaction of anammox bacteria and denitrifying bacteria, so that the nitrogen removal ability is high; furthermore, the bacteria do not compete with phosphorus-accumulating bacteria for a carbon source and a growth space, so that the phosphorous removal efficiency is high. The method solves the problem of contradiction of carbon source competition between the phosphorus-accumulating bacteria and thedenitrifying bacteria and sludge age difference in an anaerobic pool of the traditional A2O process.

The invention discloses micro-power municipal sewage treatment equipment which comprises a tank body as well as a micro-power aeration system, wherein a water inlet tube and a water outlet tube are respectively arranged at the upper parts of two sides of the tank body; a partitioning plate parallel to the tank wall is arranged on one side of the tank body, close to the water inlet tube; the partitioning plate is used for partitioning the tank body into a water inlet area and a reaction area of which the bottoms are mutually communicated; an active sludge layer, a suspension filler layer, a light ceramsite layer and a clean water layer are sequentially arranged in the reaction area from bottom to top in sequence; the micro-power aeration system comprises an aeration pipeline arranged on the active sludge layer, an aerator connected with the aeration pipeline and a power device arranged outside the tank body and used for supplying power to the aerator. The invention further discloses a process for sewage treatment by using the equipment. The equipment and the process disclosed by the invention have the advantages of good treatment effect, high efficiency in nitrogen and phosphorus removal, sludge loss prevention, sludge dead angle prevention, small occupied area, investment preservation, low operation cost, low energy consumption, convenience in operation and management, flexibility in process and the like.

The invention provides a method for carrying out nitrogen and phosphorus removal on municipal sewage municipal sewage. The method comprises the following steps: (1), carrying out anaerobic ammonia oxidation and phosphorus release treatment of short-cut denitrification phosphorus-accumulating bacteria on sewage in an anaerobic tank to obtain muddy water mixed liquor; (2), settling the obtained muddy water mixed liquor in a quick settling tank, firstly carrying out short-cut denitrification phosphorus-absorbing treatment on the obtained sludge, and then carrying out secondary settling in a secondary settling tank; firstly transferring the obtained liquid supernatant to a micro aerobic tank, carrying out oxidization treatment of ammonia nitrogen, then transferring to an anoxic tank, carrying out short-cut denitrification phosphorus-absorbing treatment, and finally carrying out secondary settling in the secondary settling tank; (3), refluxing nitrite mixed liquor produced by the micro aerobic tank to the anaerobic tank; (4), refluxing the sludge obtained by secondary settling to the anaerobic tank, wherein a liquid supernatant is the sludge obtained after nitrogen and phosphorus removal. The method disclosed by the invention can be used for not only realizing efficient nitrogen and phosphorus removal, but also greatly lowering energy consumption and material consumption in a sewage treatment process, and is especially suitable for treating low C/N (carbon/nitrogen) municipal sewage.

The invention discloses a segmented drainage type short-cut nitrification parallelly-connected anaerobic ammonia oxidation denitrifying phosphorous removal coupled endogenous denitrification device and a method thereof. Municipal sewage firstly enters a short-cut nitrification phosphorous removal reactor, denitrifying glycogen accumulating bacteria ingest the organic matter and store it as PHAs, and phosphorus-accumulating bacteria store internal carbon source and simultaneously release phosphorous; then, phosphorus is absorbed and ammonia nitrogen is converted to nitrite nitrogen under the hypoxia aeration mode, and nitrosated sewage undergoes first water draining and enters an intermediate water tank; and after anaerobic stirring and denitrification, secondary water draining is carried out. A part of raw water enters an anaerobic ammonia oxidation denitrifying phosphorus removal coupled endogenous denitrification reactor, denitrifying glycogen accumulating bacteria store PHAs, and denitrifying phosphorus accumulating bacteria store an internal carbon source and release phosphorous. After the stage, nitrite nitrogen-containing sewage in the intermediate water tank enters the anaerobic ammonia oxidation denitrifying phosphorus removal coupled endogenous denitrification reactor to realize deep nitrogen and phosphorus removal. By the method, municipal sewage deep nitrogen and phosphorus removal with low C/N ratio can be stably realized.

The invention relates to an ecological floating island phosphorous removal composite medium and a preparation method thereof. The preparation method comprises the following specific preparation processes: S1, respectively carrying out drying pretreatment on aluminum sludge, steel slag and a coconut shell fiber, grinding into powder, and mixing so as to obtain aluminum sludge powder, steel slag powder and coconut shell fiber powder; S2, weighing the following components made in the step S1 in percentage by weight: 40-50% of the aluminum sludge powder, 20-30% of the steel slag powder, 10-20% ofthe coconut shell fiber powder, 5-10% of an adhesive and 5-10% of starch for later use; S3, mixing the aluminum sludge powder, the steel slag powder and the coconut shell fiber powder weighed in the step S2 so as to obtain first mixed powder; S4, sufficiently stirring the adhesive and the starch weighed in the step S2 with the first mixed powder made in the step S3, adding water, carrying out pelletizing and medium/high temperature thermal treatment, and cooling, thereby obtaining ecological floating island phosphorous removal composite medium granules. The ecological floating island phosphorous removal composite medium has the advantages of being low in cost, good in phosphorous removal effect, effective in waste resource recycling, and good in pore structure.

The invention provides a white spirit production wastewater treatment process. The white spirit production wastewater treatment process comprises the following steps: pretreating the wastewater and removing a vinasse and a large particle suspended solid in the wastewater; adding a flocculant into the wastewater to remove a tiny suspended solid and a colloidal solid in the wastewater, adding alkali at the same time to regulate the pH value of the wastewater to alkalescence; degrading an organic matter in the wastewater through an upflow anaerobic sludge blanket reactor, and killing pathogenic bacteria at the same time; treating the wastewater sequentially through a first-level anoxic tank, a first-level aerobic tank, a second-level anoxic tank and a second-level aerobic tank, to remove nitrogen and phosphorus and the organic matter in the wastewater; finally separating the liquid and the solid of the obtained wastewater in a secondary sedimentation tank, disinfecting the wastewater subjected to solid and liquid separation, discharging to a sewage treatment plant, concentrating settling sludge obtained after solid and liquid separation, and sequentially performing filter-pressing and land filling. After the wastewater is treated by the process provided by the invention, the various indexes of a final effluent are detected to be lower than the requirements in the discharge standard (GB27631-2011) of water pollutants for fermentation alcohol and distilled spirit industry.

The invention provides an AAO-MBR process for synchronously removing nitrogen and phosphorus. The AAO-MBR process for synchronously removing nitrogen and phosphorus comprises the following steps of S1, introducing sewage into an anaerobic tank and an aerobiotic tank respectively, carrying out denitrification and phosphorus release in the anaerobic tank by virtue of organic substances carried by the sewage, introducing water of the anaerobic tank into the aerobiotic tank, and carrying out absorption of the organic substances and phosphorus in the aerobiotic tank; S2, introducing water of the aerobiotic tank into a sedimentation tank and carrying out mud-water separation in the sedimentation tank; and S3, introducing a supernatant obtained by the mud-water separation in the sedimentation tank into an MBR reaction tank, completing a nitration reaction and strengthen removal of the organic substances in the MBR reaction tank, and returning the mud in the sedimentation tank to the anaerobic tank to maintain the mud concentration in the anaerobic tank. The invention also provides an AAO-MBR apparatus for synchronously removing nitrogen and phosphorus. The AAO-MBR process and apparatus have the advantages of stability, high efficiency, short route and low energy consumption.

The invention discloses a method for activating black and odorous river course raw water by bypassing new water. The method comprises the following steps: introducing black and odorous river course raw water into an absorbing well; filtering off big-volume impurities through a grid, and then introducing into a collecting well; sucking the water in the collecting well into the initial end of an ABR reactor, guiding by a guide plate in the ABR reactor, and performing denitrification nitrogen removal and anaerobic phosphorus release reaction on sludge beds in various reaction chambers; introducing the effluent water after treatment by the ABR reactor into an MABR membrane bioreactor, and performing aerobic phosphorus accumulation reaction and nitration reaction; returning the effluent water at the tail end of the MABR reactor into the ABR reactor, and further performing denitrification nitrogen removal and anaerobic phosphorus release reaction; introducing the water body after further treatment by the ABR reactor into the MABR reactor, and further performing aerobic phosphorus accumulation reaction and nitration reaction; introducing the effluent water from the MABR reactor into a discharge bay; and introducing the water in the discharge bay and the black and odorous river course raw water into a mixing treatment device, mixing, and discharging the mixed effluent water to the original river course.

The invention provides a sewage treatment system for an improved A<2>O process, belonging to the technical field of sewage treatment. The sewage treatment system concretely comprises a coarse screen well, a fine screen well, an anaerobic pool, an anoxic pool, an aerobic pool and a secondary sedimentation tank, wherein the anaerobic pool is inoculated with domesticated anaerobic sludge for carryingout an anaerobic ammonium oxidation reaction; the top of the anaerobic tank is provided with an exhaust port; an internal reflux mixed liquid pipeline is arranged between the aerobic pool and the anaerobic pool so as to enable nitrifying liquid to flow back; the reflux ratio of internal reflux is 300-500%; an external reflux sludge pipeline is arranged between the secondary sedimentation tank andthe anaerobic pool, and the reflux ratio of external reflux is 120-200%, and the secondary sedimentation tank is also provided with a residual sewage discharge outlet. The removal of total nitrogen is completed by a combined action of anaerobic ammonium oxidation bacteria and denitrifying bacteria, so that the denitrification ability is high; furthermore, the bacteria do not compete with phosphorus-accumulating bacteria for a carbon source and a growth space, so that the phosphorous removal efficiency is high.

The invention discloses a high-concentration, degradation-resistant chemical synthesis pharmaceutical wastewater treatment method. The method comprises the steps of: (1) inputting high concentration wastewater into a pre-aeration regulating tank; (2) upgrading to a coagulation sedimentation tank; (3) discharging water into a Fenton reactor for reaction; (4) entering a nano-TiO2 photocatalytic reactor for reaction; (5) discharging water into a buffer sedimentation tank; (6) entering a comprehensive regulating tank, and introducing low-concentration wastewater into the comprehensive regulating tank; (7) lifting to a forced hydrolysis tank; (8) entering an IC distribution tank; (9) lifting to an IC reactor; (10) entering a multifunctional biological purification tank, a secondary sedimentation tank; (11) discharging water into a clear water tank. The invention also discloses a treatment system, comprising the pre-aeration regulating tank, the coagulation sedimentation tank, the Fenton reactor, the nano-TiO2 photocatalytic reactor, the buffer sedimentation tank, the comprehensive regulating tank, the forced hydrolysis tank, the IC distribution tank, an IC anaerobic reactor, the multifunctional biological purification tank, the secondary sedimentation tank and the clear water tank which are connected in sequence.

The invention provides a method for deep denitrification and dephosphorization of sewage. The method comprises that (1) effluent after pretreatment flows into an ozone oxidation pool, and is treated,wherein the ozone oxidation pool comprises an ozone oxidant, and difficultly-biodegraded organic matters are oxidized into easily-degraded organic matters in the ozone oxidation pool; (2) the effluentof the ozone oxidation pool flows into a biological active carbon filtering pool, wherein the biological active carbon filtering pool comprises active carbon and a biofilm attached to the surface ofthe active carbon; and (3) the effluent obtained by the treatment in the biological active carbon filtering pool flows into an autotrophic denitrification filtering pool, and the effluent obtained bythe treatment in the autotrophic denitrification filtering pool is discharged, wherein the filler in the autotrophic denitrification filtering pool contains dolomite and elemental sulfur. According tothe present invention, with the method, based on the pre-treatment, nitrogen and phosphorus in sewage can be efficiently removed, and the COD content can be reduced.

A UASB-two stage A/O-coagulation process for treatment of pig farm biogas slurry. The pig farm biogas slurry successively passes through and is treated in a regulating tank, an upstream anaerobic sludge bed reactor (UASB), a primary anoxic/oxic tank (primary A/O), a second anoxic/oxic tank (secondary A/O), a mid-sedimentation tank, a coagulation tank, a second-sedimentation tank, and a disinfecting tank, and finally is discharged after reaching standard. The two A/O process stages are connected in-series front and back, wherein in the first A/O stage, an active sludge process is employed, so that phosphorous is removed through a sludge discharge method by reducing age and hydraulic retention time of the sludge; and in the second A/O stage, a bio-membrane process is employed and a combined pack is arranged in the tank, so that denitrification is enhanced since a bio-membrane enriches denitrifying bacteria. The combined process has significant nitrogen and phosphorus removal effect and stable treatment effects, is strong in shock load resistance, has simple operation and has low operation cost. After treatment through the combined process to the pig farm biogas slurry, indices of discharged water satisfy demands in Discharge Standard of Pollutants for Livestock and Poultry Breeding (GB 18596-2001).

The invention discloses a contaminated water purification treatment device which comprises a housing, wherein the housing is partitioned into N aerobic tanks, N-1 anaerobic pools, two filtering basinsand two water inlet/outlet tanks, wherein the aerobic tanks and the anaerobic pools are adjacently arranged in sequence; the two filtering basins are respectively adjacent to the aerobic tanks at twoends; the two water inlet/outlet tanks are respectively arranged at two ends of the housing and are adjacent to the corresponding filtering basins; the two water inlet/outlet tanks are respectively provided with a drainage pump, a drainage pipe and a drainage bottom pipe; a water inlet control valve and a water inlet distribution pipe are arranged at the bottom of the water inlet/outlet tanks; aerating apparatuses are arranged at the bottoms of the aerobic tanks; the upper parts of the aerobic tanks are communicated with the anaerobic pools; a plurality of water inlets are formed in the bottoms of the anaerobic pools or on side faces close to the bottom; N is a natural number not less than 2. The contaminated water purification treatment device disclosed by the invention has the advantages that anaerobic-aerobic (A/O), UNITANK, multipoint water inflow and biological aerated filter treatment processes are organically combined, high-efficiency nitrogen and phosphorus removal of the contaminated water is realized, and the treatment device is low in manufacturing and operating cost and high in treatment efficiency.

The invention discloses a waste water nitrogen and phosphorus removal apparatus and a waste water treatment method, which belongs to the field of sewage treatment. The waste water nitrogen and phosphorus removal apparatus comprises a denitrification column filled with sawdust and a phosphorus filtering column filled with acidic mine drainage residues. The sawdust denitrification column is coupledwith the acidic drainage residue phosphorus filter columns, the heterotrophism-autrophism denitrification nitrogen removal technology and biology-chemical phosphorus removal technology are integrated,the nitrogen and phosphorus removal treatment is performed for the point-source breeding waste water comprising nitrogen and phosphorus and scattered agricultural floor tile discharged water, and a purpose of efficiently purifying the water can be achieved. The waste water nitrogen and phposphorus removal apparatus has the advantages of simple structure, reasonable design, small floor occupationarea, low material cost and significant purification effect.

The invention provides a granular sludge preparation method and a reactor. The granular sludge preparation method comprises the steps that to-be-purified waste water is added into an anaerobic zone ofthe reactor, and the anaerobic zone is stirred through a stirring device; mixed liquid of a flocculating agent and flocculent sludge is added into the anaerobic zone, thus the mixing concentration MLSS of the anaerobic zone is 2500-3200 mg/L, and the stirring speed of the stirring device is decreased gradually till the stirring device stops; in the mixed liquid of the flocculating agent and the flocculent sludge, the mass ratio of the flocculating agent to the flocculent sludge is (1:0.8) to (0.3:1); the anaerobic zone is stirred again through the stirring device, the mixed liquid of the flocculating agent and the flocculent sludge is added again, and thus the mixing concentration MLSS of the anaerobic zone is increased by 500-800 mg/L; and the previous step is repeated till the sludge settling ratio SV30:SV5 in the anaerobic zone is less than or equal to 1:1.2, and the granular sludge is prepared. According to the preparation method, by adding the mixed liquid of the flocculating agent and the flocculent sludge, the flocculation ability of the waste water can be reinforced, the sludge granulation process is accelerated, and the preparation forming efficiency is improved.

The invention discloses a double-mode nitrogen-phosphorus treating system for sewage and a method and belongs to the field of sewage treatment. The method is characterized in that sewage passes through a reaction tank and a secondary settling tank in sequence to realize enhanced denitrification and dephosphorization; when the overflowing sludge operation mode is adopted, the total-phosphorus removing ratio is more than 90% or the effluent TP is less than 1mg/L, deltaBOD/deltaTN is less than 4, the maximum flow flux of all areas in the system is not more than 2.2Q, and the phosphorus containingratio of returned sludge is more than 4%. The double-mode nitrogen-phosphorus treating system disclosed by the invention has the advantages that high-efficiency denitrification and dephosphorizationis achieved, the operation is energy-saving and low-carbon, the load is high, the occupied area is small, the denitrifying dephosphorization is realized, the TN removing ratio is not limited by the return ratio, the control is simple and the operation and the management are convenient and the like. The double-mode nitrogen-phosphorus treating system consists of the reaction tank, the secondary settling tank and a connecting pipeline; the reaction tank comprises a pre-hypoxic area, an anaerobic area, a middle settling area, an aerobic nitrating area, a denitrifying area, an aerobic decarbonizing area and a water discharging area in sequence from the water feeding end to the water discharging end; connecting pipelines include a main water feeding pipe, a branch water feeding pipe, a water discharging pipe, a sludge overflowing pipe, a sludge returning pipe, a remaining-sludge discharging pipe and the like; the technological process is simple.