30results about How to "Save aeration" patented technology

The invention discloses a low-oxygen aerating control device and method of segment inlet A / O biological denitrifying technique, which contains three control circuits, wherein the first and second circuits adopt DO cascade PI control system; the third circuit uses higher-precision ammonia nitrogen feedforward-feedback control system, which gathers DO density, ammonia nitrogen density of aerobic area and ammonia nitrogen density of last anoxybiotic area to reflect the change of inlet load.

The invention discloses an enhanced nitrogen and phosphorus removal device and method for low-carbon sewage. The enhanced nitrogen and phosphorus removal device comprises a biosorption tank, a sedimentation tank, a nitration reaction tank, an anoxic denitrification tank, a secondary aeration tank and a secondary sedimentation tank which are sequentially connected through pipes, and also comprisesa sludge regeneration tank, wherein the biosorption tank is connected with a short-generation sludge feeding device through a pipe; a sediment outlet of the sedimentation tank is connected with the sludge regeneration tank and the anoxic denitrification tank through pipes, and the sludge regeneration tank is connected with the biosorption tank through a pipe; a sludge outlet of the secondary sedimentation tank is connected with the nitration reaction tank through a pipe; an aeration device is arranged on each of the nitration reaction tank, the secondary aeration tank and the sludge regeneration tank. The invention further discloses an enhanced nitrogen and phosphorus removal method for the low-carbon sewage. By using the device for treating the low-carbon sewage, the utilization efficiency of a carbon source can be improved, biological nitrogen and phosphorus removal capability of the device is enhanced, and the operation cost of a sewage treatment plant can be reduced.

The invention discloses a synchronous nitrogen and phosphorus removal sewage treatment process. The treatment process comprises two parts of chemical phosphorus removal and biological nitrogen removal, wherein biological nitrogen removal is divided into a heterotrophic denitrification process and an autotrophic denitrification process, and all sludge subjected to biological nitrogen removal returns to a chemical phosphorus removal section. By means of the treatment process, the continuity of nitrogen and phosphorus removal is achieved, the dosage of added chemicals is reduced, and the cost isreduced.

The invention discloses a method and device for realizing advanced nitrogen and phosphorus removal of low-carbon-nitrogen-ratio domestic sewage by adopting a step-feed double-short-range anaerobic ammonia oxidation process, and belongs to the field of biological sewage treatment. The device comprises an urban domestic sewage raw water tank, a double-short-range anaerobic ammonia oxidation reactor and a water outlet tank. Urban domestic sewage enters the integrated reactor in batches and then runs in anoxic and aerobic modes, short-cut denitrification coupling anaerobic ammonia oxidation reaction and phosphorus release occur in an anoxic section, synchronous short-cut nitrification coupling anaerobic ammonia oxidation reaction and phosphorus uptake occur in an aerobic section, and a biological carrier is arranged in the reactor to better retain anaerobic ammonia oxidation bacteria, so that double short-range anaerobic ammonia oxidation is stably realized in the integrated SBR reactor, and advanced nitrogen and phosphorus removal is achieved.

The invention discloses a domestic sewage treatment process. Each cell of a grille board used in the step (1) is 1.5 cm, and the grille board in the specification can isolate most of floating rubbish in water; a coagulant used in the step (2) is polymeric aluminum chloride, the efficient water purifier can have an effective coagulating sedimentation effect on insoluble particles in the water; the temperature during anaerobic treatment in the step (3) is set to rise in a gradient manner and is 20 DEG C in the first half period and 8 DEG C in the later half period, the first half period of anaerobic treatment is the microorganism growth period, the later half period is the treatment period, accordingly, the temperature in the first half period is high and facilitates growth of anaerobic bacteria, and the temperature in the later half period is low and facilitates treatment of waste water through the anaerobic bacteria; the aeration mode in the step (4) is intermittent aeration, aeration is suspended for 24 h after aeration is performed for 24 h and facilitates growth of aerobic bacteria, and accordingly, useless aeration can be reduced according to the growth cycle of the bacteria and the treatment cycle; filtration in the step (5) is ultrafiltration, pressure applied to the water is 0.5 Mpa, and the purification speed of the water can be increased through ultrafiltration.

The invention relates to the field of sewage treatment, in particular to a consumption reduction and efficiency improvement system and method suitable for oxidation ditch biological denitrification. The system is characterized by comprising a biological reaction zone which is divided into a non-aeration zone and an aeration zone, and a water inlet which is communicated with a water inlet pump through a sewage inlet pipe, wherein a sewage flow meter is arranged on the sewage inlet pipe, a nitrate nitrogen probe and an ORP probe are arranged in the non-aeration area, and an ammonia nitrogen probe and a DO probe are further arranged in the aeration area. The system further comprises a carbon source storage tank with a carbon source, the carbon source storage tank is communicated with the non-aeration area through a carbon source feeding pipe, and a flow control valve and a flow meter are sequentially arranged on the carbon source feeding pipe; and the water inlet pump, the sewage flow meter, the nitrate nitrogen probe, the ORP probe, the ammonia nitrogen probe, the DO probe, the flow regulating valve and the flow meter are respectively in communication connection with a PLC. Through the system and the method, the aeration rate and the carbon source addition amount during the biological denitrification process can be accurately controlled, and the balance between the nitrificationand the denitrification is controlled to improve the sewage treatment effect.

The invention discloses a powerless sewage purification device which comprises a shell, a coarse screen, a fine filtering layer, a collecting tank and a biological activated carbon trickling filter. The powerless sewage purification device is characterized in that the coarse screen is arranged at the upper part of the fine filtering layer; the biological activated carbon trickling filter is arranged at the lower part of the fine filtering layer; the coarse screen and the fine filtering layer are inclined to the collecting tank for a certain angle; the collecting tank is arranged at the rear part of the fine filtering layer; the collecting tank comprises a comb and a tank body; the fine filtering layer comprises a water distributor and a fine filtering net; the water distributor is arranged in front of the fine filtering net; a deversoir is arranged at the tail end of the water distributor. In the working process, relatively large dirt impurities in sewage can be baffled by the coarse screen, and relatively small dirt impurities are baffled by the fine filtering net, are fed into the collecting tank under the action of hydraulic scouring and gravity, and can be directly dumped. Filtered water drops into the biological activated carbon trickling filter, and dissoluble pollutants are adsorbed and biologically degraded. The coarse screen and the fine filtering layer do not need power for cleaning of filtering nets, and the biological activated carbon trickling filter does not need power for aeration, either. By adopting the powerless sewage purification device, the purpose of removing suspended pollutants and dissoluble pollutants in sewage without power can be achieved.

A method for production of an animal feed product comprises: a) partial hydrolysis of a fermentation feedstock or the non-ethanol by-product of a fermentation process performed on a fermentation feedstock, which partial hydrolysis converts non starch polysaccharides to soluble oligomers and monomers; b) fermentation of the soluble oligomers and monomers in the partially hydrolysed feedstock or non-ethanol by-product to produce ethanol; and c) recovery of the non-ethanol by-product from the fermentation of step b) to produce an animal feed product more specifically an animal feed product with improved nutritional content. A method for production of an animal feed product comprises: a) partial hydrolysis of the non-ethanol by-product of a fermentation process performed on a fermentation feedstock, which partial hydrolysis converts non starch polysaccharides to soluble oligomers and monomers; and b) recovery of the partially hydrolysed product from step a), to exclude the soluble oligomers and monomers, to produce an animal feed product, more specifically an animal feed product with improved nutritional content. The methods produce an animal feed product with improved nutritional content by virtue of decreased levels of pentose sugars, increased relative protein concentration, decreased relative fibre concentration, decreased levels of soluble oligomers and monomers or decreased levels of reducing sugars.

The invention discloses a device for recycling, filtering and utilizing the wastewater of a large fish tank. The device comprises a body and is characterized in that a fishing cavity is arranged in the body, a hollow pipe is fixedly arranged on the left side of the body, a water inlet pipeline is communicated between the hollow pipe and the fishing cavity, a collecting device for collecting garbage such as duckweeds and water plants is arranged in the fishing cavity, and the wastewater is pumped into the fishing cavity through the water inlet pipeline. The device has the advantages that automatic water changing, water plant cleaning, manure cleaning, water filtering and the like can be performed on the large fish tank; compared with traditional simple physical and chemical filtering, the device can collect and separate the water plants falling from the fish tank first to prevent the fallen water plants from affecting the attractiveness of the fish tank and can independently collect sludge and manure and directly separate the sludge and the manure from the wastewater to reduce the contact time of manure and water so as to reduce the generation of ammonia and nitrite.

The invention discloses a garbage transfer station leachate treatment integrated device, which comprises a pretreatment unit, a biochemical treatment unit and a sludge treatment unit, the pretreatment unit comprises an adjusting tank, a reaction tank and an air floatation tank, the outlet of the adjusting tank is connected with the inlet of the reaction tank, and the outlet of the reaction tank is connected with the inlet of the air floatation tank; the biochemical treatment unit comprises an MABR tank, an MBBR tank and an MBR tank, an outlet of the floatation tank is connected with an inlet of the MABR tank, an outlet of the MABR tank is connected with an inlet of the MBBR tank, an outlet of the MBBR tank is connected with the MBR tank, and a first outlet of the MBR tank is connected with an inlet of the MABR tank; the sludge treatment unit comprises a sludge thickening tank and a sludge dewatering machine. The invention further discloses a garbage transfer station leachate treatment method. According to the method, the MABR, MBBR and MBR combined process is adopted as the method for removing the organic matters, ammonia nitrogen and total nitrogen in the leachate of the waste transfer station, so that the method is safe and efficient; the integrated treatment device disclosed by the invention is high in integration degree, small in occupied area and convenient to mount.

According to the method for synchronously removing nitrogen and carbon from swine wastewater, denitrification, methanation, short-cut nitrification and anaerobic ammonia oxidation are organically combined through an EGSB-SMD and EGSB-PNA two-stage reactor, the advantages of functional bacteria in the reactor are improved to the maximum extent through the two-stage SMD-PNA system, ammonia nitrogen and organic carbon are almost completely removed, culture is easy, and the method is suitable for industrial production. The whole process is high in stability and controllability. In the EGSB-SMD, the anoxic-anaerobic structure of the granular sludge is beneficial to the synergetic symbiosis of methanogens and denitrifying bacteria, the COD removal load is higher while the removal of NO2-N and NO3-N in raw water and reflux sewage is considered, and an internal reflux device and a PNA external reflux device in the SMD dilute the influent concentration and reduce the substrate inhibition. In EGSB-PNA, an internal reflux device increases the ascending velocity and promotes the formation of granular sludge with larger volume, and soft and semi-soft combined filler in the reactor promotes the formation and tight attachment of a biological membrane, so that the biomass in the reactor is maintained, and the stable operation of a CANON process is maintained.

The invention discloses a sewage treatment process for synchronous denitrification and dephosphorization, which includes chemical dephosphorization and biological denitrification. Biological denitrification is further divided into heterotrophic denitrification and autotrophic denitrification. The sludge is returned to the chemical dephosphorization section, and the invention realizes the continuous denitrification and dephosphorization, reduces the amount of chemicals added, and lowers the cost.

The invention discloses a method for removing trace gasoline component BTEX in groundwater with high efficiency and low energy consumption. Sludge supernatant goes through activated carbon bed layer from bottom to top through a sampling pump, flows back a sludge supernatant storage tank after flowing out from the upper end of an activated carbon column and so the cyclic inoculation goes; inlet water is switched into BTEX polluted water to carry out acclimation reproduction on bacteria inoculated on the activated carbon so as to form a biofilm; the inlet water enters the activated carbon column through the sampling pump by an updraft mode, and after operation the biofilm becomes mature through natural acclimation at the BTEX activated carbon column; after the biological activated carbon bed layer is slightly dredged, part microorganism in the bed layer goes up to the upper part of the bed layer with the rise of the water flow, trace microorganism concentrated bacteria liquid is removedby a pipette and is taken as a bacteria source after being diluted; and the bacteria source is used for inoculation of new carbon columns by the previous cyclic inoculation method, thus obtaining newBTEX biological activated carbon technique. The method has the advantages of high capacity load, small requirement amount on dissolved oxygen, simple and convenient flow, simple technique equipment and easy operation and management.

A device and method for deep denitrification by AOA (PD‑ANAMMOX) biofilm technology belong to the field of sewage biological treatment. Its device includes raw water tank, anoxic grid (A), aerobic grid (O), rear anoxic grid (PD‑ANAMMOX), and carbon source dosing box. First, the raw water and the returning nitrifying liquid enter the anoxic grid, fully utilize the carbon source in the raw water, and perform a complete denitrification reaction. At the end of the anoxic grid, about 40% to 50% of the mixed solution surpasses the aerobic grid and enters the post-anoxic grid. The other part of the mixed solution enters the aerobic grid under the action of plug flow for nitrification. Then, the nitrifying liquid enters the post-anoxic compartment, and firstly adds sodium acetate as a carbon source for short-range denitrification reaction, and then enters the back anoxic compartment together with the excess sewage to complete the anaerobic ammonium oxidation reaction, and finally, it is discharged after static settling. The invention is suitable for the treatment of low C / N urban domestic sewage and areas where TN is required to be below 10 mg / L, and the effluent quality is stable. Compared with the conventional post anoxic denitrification filter, this process can save aeration energy consumption and carbon source.

The invention discloses an urban sewage treatment process for recovering organic matter and phosphorus. The process system includes the main process units such as transfer aggregation, precipitation separation, biofilm and denitrification treatment, as well as hydrothermal treatment and modification preparation. Urban sewage is treated by transfer, aggregation and sedimentation, and the organic matter is concentrated and enriched in the sludge to be removed, and then enters the biofilm unit, absorbs and removes phosphorus through aerobic operation, and then undergoes biological denitrification treatment, and finally the effluent meets the discharge requirements. Part of the sludge is subjected to hydrothermal treatment, and the obtained water-soluble macromolecular polymer is modified to prepare a transfer aggregation medium, which is reused in the transfer aggregation process of sewage; Reuse the same recovery solution until the phosphorus in it increases to the limit concentration and then replace it to obtain a high-concentration phosphorus solution; hydrothermal treatment can also obtain the carbon source required for biofilm and biological denitrification. Excess sludge and hydrothermal treatment solid phase products are easy to recycle.

The invention discloses a device and method for treating petrochemical wastewater by microaerobic hydrolysis acidification-A / O biofilm method. In the invention, air is introduced into the hydrolytic acidification tank to control the amount of aeration so that it is in the state of microaerobic hydrolysis acidification. A sedimentation tank is installed at the end of the hydrolytic acidification tank for sludge reflux. The supernatant enters the A / O biofilm reactor, and the O section is filled with porous plastic ball carriers filled with polyurethane foam. The effluent enters the secondary settling tank for mud-water separation, and the sludge returns to Section O, the supernatant was discharged. The method of the present invention treats petrochemical wastewater at normal temperature, does not need to add acid and alkali to adjust the pH value, can effectively inhibit the reduction of sulfate in petrochemical wastewater, and reduce H 2 The generation of S reduces the corrosion of metal equipment. The entire sewage treatment system has high efficiency and reliable operation, and is especially suitable for standard upgrading and transformation of existing petrochemical sewage treatment plants.

The invention discloses a device and a method for a low-C / N ratio municipal wastewater short-cut denitrification / short-cut nitrification anaerobic ammonia oxidation biofilm process, belonging to the field of biological sewage treatment. The method comprises the following steps: allowing municipal wastewater and one part of supernatant subjected to short-cut nitrification anaerobic ammonia oxidation in the previous cycle to simultaneously enter a short-cut denitrification bio-membrane reactor, performing anaerobic stirring, performing short-cut denitrification by fully utilizing a carbon source in raw water, and reducing NO3<-> into NO2<->, so that the influence of organic matters in the raw water on microbes in the subsequent short-cut nitrification anaerobic ammonia oxidation bio-membrane reactor; and pumping the supernatant containing NH4<+> and NO2<-> into the short-cut nitrification anaerobic ammonia oxidation bio-membrane reactor through a peristaltic pump for carrying out an anaerobic ammonia oxidation reaction, performing short-cut nitrification and anaerobic ammonia oxidation on the residual NH4<+> in an intermittent aeration and intermittent stirring manner, and finally draining. According to the method disclosed by the invention, the carbon source does not need to be added, advanced nitrogen removal of the low-C / N ratio municipal wastewater is realized, and the method has the advantages of energy consumption, small treatment amount of residual sludge, and the like.

The invention discloses a low-concentration ammonia nitrogen sewage treatment device and a treatment method. The low-concentration ammonia nitrogen sewage treatment device includes: a water inlet tank, a reactor, and a terminal sedimentation tank; the reactor includes an aerobic zone I and an intermediate sedimentation tank , aerobic zone II, anoxic zone I and anoxic zone II; the ratio of the volume of the aerobic zone II to the sum of the volumes of the anoxic zone I and hypoxia II zone is 15:30-40; the end The sedimentation tank is equipped with a drainage pipe, a sludge return pipe and a second sludge pipe for discharging sludge. The inlet end of the sludge return pipe is connected to the terminal sedimentation tank, and the outlet end is connected to the sludge inlet of the aerobic zone II. connected. The low-concentration ammonia nitrogen sewage treatment device of the present invention not only strengthens the TN removal effect in the aerobic zone and increases the contribution rate of autotrophic denitrification, but also enriches ANAMMOX bacteria in the anoxic zone, thereby constructing an economical, stable and efficient new biological denitrification system . Moreover, the invention can save aeration, save commercial carbon sources, effectively recover energy and save sludge treatment costs.