47results about How to "Shorten the aeration time" patented technology

The invention discloses a quick starting method of an SBR (Sequencing Batch Reactor) for synchronously denitrifying and removing phosphor, and belongs to the field of sewage treatment. The quick starting method using a batch-injection chronological sequencing batch reactor comprises the following steps: (1), operating the SBR system under an anaerobic/aerobiotic alternation condition, and domesticating and enriching phosphorus-accumulating bacteria, so that the phosphorus-accumulating bacteria intake phosphor under the aerobiotic condition and release phosphor under the anaerobic condition; removing phosphate in water by removing mud; (2), changing an operating way of the system, and enriching denitrifying phosphate-accumulating organisms; increasing an anoxic zone and shortening the aeration time, so that the denitrifying phosphate-accumulating organisms utilize an intracellular carbon source and use nitrate/nitrite as an electron acceptor to intake phosphor; (3), adding a compound fungicide into the reaction, so that biological enhancement is repeatedly coupled with anaerobic/aerobiotic/anoxic/aerobiotic starting method, DPB (Denitrifying Phosphorus-removal Bacteria) are effectively proliferated, glycogen accumulating organisms are restrained, the starting time of the reactor is shortened, and the water outlet effect is improved. The starting way disclosed by the invention operates about 50 days in total, can be used for saving about 30 days and saving the aeration time by about 30% in comparison with an anaerobic/ aerobiotic/ anoxic starting method.

The invention discloses a reversed-order SBR (Sequencing Batch Reactor) water processing device and method for enhanced nitrogen removal and belongs of the field of activated sludge sewage processing. The device comprises a reversed-order SBR pool, a water inlet pipe, a water outlet pipe, an air inlet pipe and an aeration head, wherein the reversed-order SBR pool can carry out anoxia denitrification denitrification, anaerobic phosphorus release, aerobic denitrification and aerobic phosphorus uptake reaction; the water inlet pipe is connected with a water inlet pump; the inlet of the air inlet pipe is connected with an air blower; the outlet of the air inlet pipe is connected with the aeration head; a submerged stirrer, a dissolved oxygen (DO) sensor, an oxidation-reduction potential (ORP) sensor and a pH sensor are arranged in the reversed-order SBR pool are arranged in the SBR pool for monitoring on line; and the meters are respectively connected with a PLC (Programmable Logic Controller). On the basis of the traditional SBR reaction pool, the reversed-order SBR water processing device has the advantages that a water inlet mode is improved and a water inlet time sequence and water inlet duration of working procedures, such as stirring, aeration, precipitation, water cecantation and the like are adjusted, so that the denitrification efficiency of the reversed-order SBR technology is higher, the use ratio of the raw water carbon source is bigger, the processing effect is more stable, and the operation cost of a sewage treatment plant is directly lowered.

The invention discloses an inner-loop three-phase biological fluidized bed type membrane bioreactor (MBR). The reactor comprises an inner-loop fluidization region and an MBR membrane bioreaction region, wherein the bottom of the inner-loop fluidization region is communicated with a water inlet pipe; the inner-loop fluidization region comprises an internal cylinder and an external cylinder sleeving the internal cylinder; a gap serving as a downstream area is formed between the internal cylinder and the external cylinder; the internal cylinder is provided with a channel serving as an upstream area; an air-blast system for driving water to rise along the upstream area is arranged inside or at the bottom of the internal cylinder; a packing is arranged in or at the bottom of the internal cylinder; an MBR membrane component is mounted in the MBR membrane bioreaction region; an aerator pipe is arranged at the bottom of the MBR membrane component; the water outlet of the MBR membrane component is communicated with a water producing pipe. The inner-loop three-phase biological fluidized bed is combined with the MBR to form the inner-loop three-phase biological fluidized bed type MBR which is reasonable in spatial arrangement, and therefore, the energy consumption can be further reduced; in addition to treating domestic sewage, the inner-loop three-phase biological fluidized bed type MBR is further capable of treating industrial wastewater in the fields of printing and dyeing process, oils and fats, food, leather and the like.

The invention discloses a kitchen wastewater treatment method which comprises the following steps: 1, chemical phosphorus removal is performed on kitchen wastewater flowing out from an IC (internal circulation) reactor; 2, after passing through a water quality equalization tank, the wastewater enters a CASS (Cyclic Activated Sludge System) to react, so that soluble substrates, organisms, phosphorus and an synchronous nitrification and denitrification effect are removed; 3, after the wastewater flows into an intermediate water tank to be subjected to volume regulation, the wastewater enters a Fenton oxidation reactor and an iron-carbon micro-electrolysis device so as to improve biodegradability of the wastewater; 4, after passing through the Fenton oxidation reactor and the iron-carbon micro-electrolysis device, the wastewater directly enters a hydrolysis acidification pool from the intermediate water tank, suspended matter and iron ions are removed and sludge is separated, hydrolyzed and acidified; 5, the wastewater is subjected to aerated oxidation to remove COD (Chemical Oxygen Demand) content; 6, the wastewater enters an MBR (Meane Biological Reactor) pool and hardly degradable substances are degraded, so that the drained wastewater reaches the take-over standard of a sewage treatment plant; 7, after the sludge discharged from a chemical phosphorus removal pool and the MBR pool is processed by a precision solid-liquid separator, solids are prepared into an organic fertilizer and filter-pressing liquid enters the water quality equalization tank.

The invention relates to a sewage treatment system and a sewage treatment method for reducing greenhouse gas emission. The system comprises a moving bed biomembrane biochemical reactor MBBR, an air stripping pool and an up-flow anaerobic sludge blanket UASB which are sequentially connected, wherein bio-filler is arranged in the MBBR, an aerating head is arranged at the bottom, an intercepting screen is arranged at an upper overflowing water outlet for preventing loss of the bio-filler, a mud outlet is formed at the bottom of the UASB, a sludge return opening is formed on the upper part, and a three-phase separator and an air outlet are formed on the top. Sewage enters into the MBBR for intermittent aeration, so that accumulation of NO<2-> is realized; effluent of the MBBR enters into the air stripping pool through a peristaltic pump to remove dissolved gas in water and then enters into the UASB; denitrifying anaerobic methane-oxidizing bacteria convert NO<2-> into N2 to be removed. According to the system provided by the invention, the UASB is coupled by using the MBBR, so that actual sewage with low carbon nitrogen ratio is treated in an energy-saving and efficient manner with less secondary pollution.

The invention provides a device and a method for biological denitrification of landfill leachate through SBR (Sequencing Batch Reactor) short-cut nitrification-SBBR anaerobic ammonia oxidation combined process (Sequencing Batch Biofilm Reactor), belongs to the technical field of biological denitrification, and is applicable to waste water with high ammonia nitrogen and a low carbon nitrogen ratio (C/N). The device provided by the invention is provided with SBR and SBBR. The SBR reactor is mainly used for a short-cut nitrification reaction, and hereinafter referred to as SBRSBNR; the SBBR reactor is mainly used for an anaerobic ammonia oxidation reaction, and hereinafter referred to as SBBRANAMMOX. The raw liquor of the leachate is mixed with SBBRANAMMOX effluent reflux at first and then fed into the SBRSBNR for denitrification; the raw liquor of the leachate can be diluted, and partial nitric nitrogen in water also can be removed by taking full advantage of the carbon source in the raw water. Next, the effluent of the SBRSBNR is further mixed with the raw liquor of the leachate, and fed into the SBBRANAMMOX for an anaerobic ammonia oxidation-denitrification synchronous denitrification reaction; consequently, synchronous removal of nitrogen and COD (Chemical Oxygen Demand) is realized. The system removal rate of COD is 91%, the removal rate of TN is greater than 97.5%, and the total nitrogen load of the SBBRANAMMOX is about 0.7 Kg TN/m<3>.

The invention discloses a micropower slow-release type aeration structure and method. The aeration structure comprises an air blower, an aeration main pipe, aeration branch pipes, air shut-off discs and pipe brackets; an air outlet of the air blower is introduced into a sewage treatment pond through the aeration main pipe, the aeration main pipe is vertically arranged on one side of the sewage treatment pond, the aeration branch pipes are transversely arranged in the sewage treatment pond in a layered mode from top to bottom, the water inlet ends of the aeration branch pipes are communicated with the aeration main pipe, and the pipe brackets are perpendicular to the bottom of the sewage treatment pond and fixedly connected with the aeration branch pipes on each layer; aeration holes of different hole diameters are formed in the aeration branch pipes, and the upper ends of the aeration holes are covered with corresponding air shut-off discs. The micropower slow-release type aeration structure and method solve the problem of local oxygen insufficiency in sewage treatment, under the situation that the requirement for output water quality is unchanged, aeration time required by an aeration device is shorter, the requirement can be met just by micropower aeration, energy consumption is lowered, and operation cost of a sewage treatment device is reduced.

The invention discloses a method for treating middle and late stage landfill leachate by a continuous flow short-cut nitrification/endogenous short-cut denitrification/anaerobic ammonia oxidation integrated process, and belongs to the field of biological treatment of high-ammonia nitrogen sewage. Middle-late stage landfill leachate enters an AOA continuous flow reactor to operate in an A/O/A (anaerobic/aerobic/anoxic) mode, and total nitrogen removal is achieved through a PN/A-ED/A (short-cut nitrification/anaerobic ammonia oxidation-endogenous short-cut denitrification/anaerobic ammonia oxidation) combined process. Microorganisms in the anaerobic section absorb an external carbon source in inlet water and store the external carbon source as an intracellular carbon source, short-cut nitrification is carried out in the aerobic section, and ammonia nitrogen in the inlet water is partially oxidized into nitrite nitrogen; and in the anoxic section, anaerobic ammonia oxidation is firstly carried out to generate part of nitrate nitrogen, the nitrate nitrogen is reduced into nitrite nitrogen through endogenous short-cut denitrification, and the nitrite nitrogen is provided for anaerobic ammonia oxidation reaction; 95.3% of total nitrogen in the middle and late stage landfill leachate is removed through the continuous flow reactor, and the continuous flow reactor is suitable for deep denitrification treatment of high-ammonia-nitrogen wastewater such as the landfill leachate.

A multi-stage ring-current aerating tower is composed of a main body, enlarged upper segment, coaxially arranged multi-stage guide barrels, and aerating head under said guide barrels. Its advantages are high fluid mechanics performance, high transfer rate of oxygen, and less floor area (decreased by 50%).

The invention discloses a method for treating the washing wastewater of high-salt pickled vegetable by biology-physical chemistry combined technology, and solves the problems that the influence of wastewater content is great, the treatment condition is difficult to control, the water quality of effluents is not stable, the outlet water is poor, and the like in the prior art. The method comprises the following steps: (1) removing sols and suspensions in a wastewater body by using a composite flocculant; (2) introducing the obtained flocculation effluent into an anaerobic system to degrade and decompose most of organic matter in the water; (3) introducing the anaerobic effluent into an aerobic biochemical system to degrade and decompose residual organic matter and reduce the concentration ofNH3-H and total phosphorus (TP); (4) adjusting the pH value of the supernate of the aerobic effluent, carrying out blow-off under an alkaline condition to remove residual ammonia nitrogen, and addinga coagulant to remove phosphates before the alkaline blowing-off is completed to reduce the TP; and (5) carrying out deep treatment by adopting the adsorption of activated carbon to enable the indexes such as chemical oxygen demand (COD), NH3-H, TP, suspended solids (SS), turbidity, chroma and the like of the effluent to meet the first-level standard of the Integrated wastewater discharge standard (GB8978-2002). The method is suitable for the treatment of the washing wastewater of the high-salt pickled vegetable in a pickled vegetable factory, and has a certain application prospect.

The invention relates to an aeration device for aeration and oxygenation during sewage treatment, in particular to an aeration machine. The aeration machine is provided with an aeration wheel, a column connector, a bracket, a variable-speed motor and a motor and is characterized in that: the aeration wheel is connected with the column connector; the column connector is connected with the variable-speed motor; the variable-speed motor is connected with the motor; the variable-speed motor and the motor are arranged on the bracket; and the bracket is generally fixed at the top end of sewage treatment equipment. When the aeration machine is used, the variable-speed motor and the column connector are driven to rotate after the motor is connected to a power supply, so that the aeration wheel is driven to rotate close to a water surface by the column connector. Aerobic growth is undergone on a sewage upper layer, surface layer water is stirred along with rotating blades, oxygenation is performed by directly stirring in an aerobic region, the surface layer water rotates from bottom to top to form a negative-pressure region, and oxygenation is performed through a bypass channel between blades, so that oxygenation capacity is greatly enhanced. The aeration machine has the advantages of reasonable structure, simple manufacturing, convenience in operating, high working efficiency, good economic benefit and the like.

The invention relates to the technical field of sewage treatment equipment, in particular to an anoxic oxic (AO)<2> and sediment integrated multistage circulating reactor. The (AO)<2> and sediment integrated multistage circulating reactor comprises a shell, a sewage inlet pipe and a lifting device; an anoxic area, a first oxic area, a facultative area, a second oxic area and a sediment area whichare connected cyclically are isolated in the shell through partition plates, the anoxic area is located on the lower middle part of the shell, the first oxic area, the facultative area, the second oxic area and the sediment area are sequentially arranged on the upper part of the shell from inside to outside, sewage sequentially flows in the first oxic area, the facultative area, the second oxic area, the sediment area and the anoxic area in an unpowered mode through the water level difference, clear water in the sediment area overflows from the outer side of the upper part of the sediment area, and parts of sludge in the sediment area is discharged from a sludge discharging pipe; the sewage inlet pipe provides the sewage to the anoxic area and the facultative area according to the proportion; and the lifting device is used for lifting the sewage in the anoxic area to the first oxic area. The (AO)<2> and sediment integrated multistage circulating reactor is small in floor space and small in investment.

The invention discloses a continuous dynamic membrane system operation device, which comprises a supporting membrane, a water inlet collecting tank, a peristaltic pump, a water inlet, a water outlet,a water outlet collecting tank, a backwashing water pump, a backwashing air pump, a backwashing water inlet, a backwashing water outlet, a backwashing water collecting tank, a pressure sensor and a processor; when the actual measurement pressure value exceeds a preset pressure value threshold value, the processor calculates according to the actual measurement pressure value and a preset pressure value standard value to obtain strength values and flushing duration of the backwashing water pump and the backwashing air pump; when the loosening value of the dynamic membrane layer above the supportmembrane reaches a preset condition, the loosening membrane layer is washed off by adopting a backwashing water pump to enable the error between the transmembrane pressure of the washed dynamic membrane and the standard value of the pressure value to be less than a preset error threshold value. The invention has the advantages of high backwashing efficiency and high dynamic membrane recovery speed, and indirectly enhances the operating efficiency of the whole dynamic membrane filtration system.

The invention discloses an environment-friendly energy-saving aeration device which comprises an aeration tank and an aeration disc. The aeration disc is arranged at the lower portion of the aerationtank. A flow guiding cylinder is arranged above the aeration disc, spiral blades are arranged inside the flow guiding cylinder, a center shaft is fixedly connected with the spiral blades, and circumferentially distributed return pipes are communicated with the upper portion of the flow guiding cylinder. By arranging the flow guiding cylinder, the spiral blades and the return pipes, vertical circulation of sewage is achieved, sewage repeatedly makes contact with gas sprayed by the aeration disc, the mixed dissolution efficiency is improved, the aeration time is shortened, and energy is saved; by arranging a spraying pipe with an opening towards the aeration disc, the aeration disc can be flushed, the common problem that an aeration hole is blocked is avoided, and the aeration efficiency isensured.

The invention discloses a method for removing pungent smell in electronic-grade phosphoric acid production. After hydrogen sulfide gas of the filtered electronic-grade phosphoric acid is blown off with high-purity nitrogen, a deodorant is added, and then the high-purity nitrogen is continuously fed, and residual hydrogen sulfide and phosphorus trioxide are cyclically oxidized, so that the pungentsmell-free electronic-grade phosphoric acid of which readily oxidizable substances and sulfate ions have concentrations less than 2 ppm is obtained. The problems that the conventional method is incomplete in pungent smell removal and wastes time and energy, equipment is complicated in structure, and the specification of the electronic-grade phosphoric acid fluctuates after the gas is removed are solved; the quality of a high-purity phosphoric acid product is improved; the gas treatment time is shortened; the production efficiency is improved; and the production period is shortened.