175 results about "Activated sludge system" patented technology

A beam is pivotally supported at a fixed pivot support, the beam movable in cyclic tilting motion such that ends of the beam move vertically in mutually opposing directions. The ends of the beam are pivotally engaged with vertical arms extending downwardly. The arms terminate with mixing plates immersed within the fluid so that the mixing plates cause fluid mixing as the tilts. A fixed film biomass is engaged with the surfaces of the plates for improved bio-processing within the tanks.

The invention discloses a bio-augmentation treatment sludge in-situ reduction method, which is characterized in that: on the basis of a traditional active sludge biochemical treatment system, functional microbial inoculum is additionally added to enhance organic matter degradation and a metazoan is additionally added to enhance predation so as to optimize a biotic community structure, so the sludge in-situ reduction can be realized during the sewage treatment process, and the sludge reduction effect can reach 60 percent to 100 percent. The functional microbial inoculum is a mixed flora which is specially used for the sludge reduction and is obtained through directed selection domestication culture and comprises five types of special bacterial strain selected from soil and active sludge. The metazoan is a vermes-typed micro metazoan which is selected in a laboratory and is used for the bio-augmentation predation of an active sludge system through the propagation. Through the bio-augmentation treatment method, the sludge in-situ reduction can be realized under the situation that the normal running of a sewage plant is not influenced, and the method has the characteristics of less investment, low running expense, fast action, stable running and the like. The method has general adaptability to ordinary sewage biochemical treatment systems.

The systems and methods described provide for reducing sludge generation, and thus sludge wasting and handling, by including an anaerobic completely stirred tank reactor (CSTR) as a bioreactor in a side-stream. The CSTR provides a significant simplification of side-stream treatment design, enhanced sludge minimization, and enhanced removal of nitrogen and phosphorous without the need to add organic carbon. The described systems and methods provide generation of biogas including both hydrogen and methane from the activated sludge system. The described systems and methods avoid complex reactor designs for nutrient removal.

The invention belongs to the technical field of environment protection, and in particular discloses a sewage treatment method which specifically comprises the steps of inputting sewage into a mechanical grid, feeding the sewage passing through the mechanical grid into a regulating reservoir, further inputting the sewage in the regulating reservoir into a sewage cooling tower, inputting the sewage which is cooled by the cooling tower into a coagulative precipitation tank, feeding the sewage subjected to coagulative precipitation into a CASS (Cyclic Activated Sludge System) tank, and passing the sewage which is treated by the CASS tank through a biofilter so as to finally obtain treated water. The sewage treatment method has the advantages that the sewage treatment method is high in impact load adaptive capacity, not easy to have sludge bulking, small in floor space and simple and convenient to manage.

The invention discloses a treatment process for tuber mustard waste water, which comprises the steps that the waste water passes through a grid, a regulation tank, a dephosphorization settling tank, a hydrolysis acidation tank, an anaerobic contact tank, an intermediate settling tank and a CASS (Cyclic Activated Sludge System) tank in sequence, and reaches standards to be discharged. The treatment process removes organic matter and has stronger denitrification and dephosphorization functions; and the discharged water can meet a first-grade discharge standard of GB 8978-1996.

The invention relates to one kind of wastewater treatment bioreactor. An aeration zone and a settle zone are provided in the reactor, the aeration device is located above the aeration zone, and a barrier and a gap are arranged between the aeration zone and the settle zone. It has many advantages: high oxidation rate in mixed liquid, high oxygen utilization rate of 40-50%, large volume load, short hydraulic retention time, run as activated sludge system, simple structure, low building cost, better solid-liquid separation effect, little surplus sludge produced, compact microorganism grains in mixed wastewater, and great settle capability. By comparison with other devices and technologies for wastewater treatment, the surplus sludge produced in degradation of 1 kg BOD declines by about 40 percent if the invention is used, which greatly reduces the amount of sludge for treatment.

The invention relates to a treatment system and an operation method of phosphorus-containing organic wastewater. A chemical phosphorus removal system is combined with an aerobic biochemical system, thus forming a system that removes phosphate and organic matters in the effluent of an aerobic removal system. The chemical phosphorus removal system consists of a chemicals feeding system, a mixed reaction pool, a sedimentation pool, a residual sludge refluxing system and a chemical sludge refluxing system. The aerobic biochemical system consists of an aerobic contact oxidation system and an aerobic activated sludge system. During the process of chemical phosphorus removal, sulfide and part of the organic matters can be removed simultaneously, thus causing the subsequent aerobic process to run stably and reducing running cost thereof. The residual sludge of the aerobic biochemical system is subjected to aeration and then refluxes to the chemical phosphorus removal system, and flocculation is absorbed and chemical sludge flocculating constituents are settled by utilizing residual activated sludge, thus improving chemical phosphorus removal efficiency. Part of the chemical phosphorus removal sludge refluxes after aeration, thus reducing the feeding amount of chemicals and reducing running cost. The treatment system and the operation method can cause organic wastewater with high phosphorus concentration to reach strict discharge standard after being treated.

The invention relates to a device for detecting dynamic specific oxygen utilization rate (SOUR) of an activated sludge system, belongs to the theory and technique of strengthening biological denitrification treatment with an activated sludge process, and designs a set of on-line detection device for simultaneously feeding back the activated sludge specific oxygen utilization rate of SBR process by aiming at the problems of off-line measurement, hysteresis quality and unavailable on-line detection and feedback and the like existing in the traditional method for measuring the oxygen utilization rate. The system is most characterized in that a sealed recorder jar is put on a magnetic stirring apparatus and a sludge circulating loop is formed through a reflux pump and a reactor; sensors are dissolved oxygen sensors and two sensors are respectively put in the sealed recorder jar and an SBR reactor so as to be capable of realizing the on-line detection of SOUR and the simultaneous feedback. The device is concise in design, stable in operation and good in reproduction quality of measured data, and can accurately monitor the reactive states of the system at different time by intuitively representing the SOUR curve.

The invention relates to an integrated treatment method of corn alcohol wastewater. The method is high in biochemical efficiency, simple to operate and low in treatment cost. Biochemical effluent is superior to a discharge standard of fermentation alcohol wastewater, and deep effluent meets a requirement of make-up water of industrial recycling cooling water. The method comprises the steps that a grid intercepts a thick and big suspended matter; the wastewater is cooled; a pH value of the wastewater is adjusted; the wastewater with the pH value being adjusted is pump into a hydrolytic acidification tank, and subjected to hydrolytic acidification, and then to anaerobic treatment by an internal recycling up-flow anaerobic sludge blanket; partial wastewater after the anaerobic treatment is subjected to aerobic treatment by a filling cyclic activated sludge system method; partial wastewater not subjected to the anaerobic treatment flows back to a water inlet of the up-flow anaerobic sludge blanket, and then enters the up-flow anaerobic sludge blanket for the anaerobic treatment; blasting is required in the aerobic treatment process; and the wastewater after the aerobic treatment enters an intermediate water well, is precipitated in a coagulative precipitation tank, then enters a multi-medium filter for filtering, and is disinfected. The method is simple to operate, low in treatment cost, and high in biochemical efficiency.

The invention provides an integrated non-gradient activated sludge sewage treatment device which includes a reactor shell body. The reactor shell body is provided with an accommodating space of which a top end is opened. A lifting cylinder is disposed in the accommodating space in the vertical direction and is provided with a channel of which an upper end and a lower end are opened. An air diffuser is arranged in the channel and is communicated with an external air pump through an aeration pipe. The reactor shell body is also provided with a water inlet, a sludge discharging outlet and a water outlet which are communicated with the accommodating space, wherein the water outlet is arranged above the water inlet and the sludge discharging outlet. The sewage treatment device can enhance a mass transfer effect and increase treatment efficiency, can enable a treatment range of sewage to be enlarged, can improve an anti-impact capability of an activated sludge system, can increase density of microorganism in a reaction zone, can increase a sewage treatment load, can save an occupied area and reduce cost, and meanwhile is convenient to operate and manage and is easy to control.

The invention discloses a system and a process for sludge in situ decrement enhanced by utilizing metazoan and application of the process. The system comprises an anaerobic zone, an anoxic zone, an oxic zone, a metazoan growing zone and a secondary sedimentation zone. A biochemical system can perform in situ decrement through arranging the metazoan growing zone in the sewage treatment process; and cultivated and domesticated metazoan is continuously added in the metazoan growing zone to enhance organism predation, thereby achieving the purpose of sludge in situ decrement and realizing sludge decrement effect of 50-80% of activated sludge. The process of activated sludge in situ decrement with an efficient biological method is suitable for any activated sludge methods and deformation technologies thereof, such as A<2>/O (anaerobic-anoxic/oxic), A/O (anoxic/oxic), SBR (sequencing batch reactor), MSBR (modified sequencing batch reactor), CASS (cyclic activated sludge System), oxidation ditch, MBR (membrane bio-reactor) and the like, can also be used for a biological treatment technology having a biological carrier, can be used for sludge decrement of a newly-built sewage treatment engineering and can also be used for transformation of a built engineering with extremely low transformation cost.

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 method for treating urban domestic sewage based on magnetic nanomaterial reinforced activated sludge, which comprises the steps of: adding a magnetic iron oxide nanomaterial into an activated sludge system used for treating the urban domestic sewage, wherein the dosage of the magnetic iron oxide nanomaterial is 0.05-1.0g/ (L. week); and under the conditions of room temperature and 4-12hours of hydraulic retention time, fully carrying out aeration and completely mixing so as to lead the activated sludge in a reactor to fully react with pollutants. The experimental result proves that after the magnetic nanomaterial is added into the sewage, the treatment efficiency of the pollutants can be effectively improved, and the microbial activity of the activated sludge is remarkably increased. The method is simple in technology and mild in reaction conditions, and can be carried out at the room temperature and normal pressure; and the method is safe and harmless to the environment, and is convenient for engineering application.

The invention provides an activated sludge-biomembrane combined circulating flow denitrification and desophorization integrated sewage treatment device and a method. The integrated sewage treatment device consists of an improved CASS (Cyclic Activated Sludge System) reactor and a chemical dephosphorizing pond, wherein the inner ring of the improved CASS reactor is served as an anaerobic region, the outer ring is provided with an anoxic region and an aerobic region hung with biomembranes alternately, and the impact load resistance capability of the improved CASS reactor is increased through the flow state combined by a pushing flow and a mixed flow. The integrative sewage treatment device is only provided with an aeration device on the outer aerobic region, an anoxic region or even an anaerobic region is arranged after the aerobic region because the concentration of dissolved oxygen changes from high to low at the downstream of the aeration device, therefore, denitrifying bacteria can directly utilize nitration products to denitrify, and promote nitrification and denitrification to simultaneously generate in the device. The impact load resistance capability of the reactor can be strengthened through the biomembranes arranged alternately, a bidirectional sludge underwater plug-flow device is utilized to prevent the biomembranes to block circulating sludge, the simultaneous occurrence of nitrification and denitrification reactions in the reactor is beneficial to reducing aeration amount and energy consumption, and the volume of the reactor can be reduced because of dispensing with an anoxic pool and a secondary sedimentation tank, thereby saving construction cost and operation cost. The integrated sewage treatment device is suitable for sewage treatment in small towns with insufficient funds.

The invention discloses a device for treating wastewater produced in the production process of alkaline peroxide mechanical pulp (APMP). The device consists of a grid trench, an adjustment primary settlement tank, a shallow layer air floatation device, a middle water tank, a cooling tower, an upflow anaerobic sludge blanket (UASB), a hydrolysis and acidification tank, a middle settlement tank, a cyclic activated sludge system (CASS) biochemical tank, a secondary settlement tank and an advanced oxidation tank which are sequentially connected; the secondary settlement tank is connected with a sludge concentration tank; the sludge concentration tank is connected with a belt dehydrator; the CASS biochemical tank comprises an organism selection area adopting an anaerobic environment, a facultative area which has the effect of buffering water quality, and a main reaction area for degrading organic matter; the main reaction area is provided with an oxygen supply system which ensures long sludge age and low sludge load; and an ozone composition is arranged in the advanced oxidation tank to reduce chemical oxygen demand (COD). The UASB, hydrolysis and acidification, CASS and advanced oxidation process combined device is adopted, so that wastewater produced in the production process of APMP can be effectively treated, and the index of effluent reaches the requirement of GB3544-2008.

The invention relates to an improved UCT step-feed efficient biological denitrification and dephosphorization device based on the DEAMOX technology and an application method and belongs to the technical field of biological sewage treatment.The technical problems of high energy consumption and high carbon source adding in a common low-carbon-source urban sewage treatment process are solved through the organic matter type denitrification ammoxidation technology.The device mainly comprises an urban sewage raw water tank, an improved UCT step-feed device and a settling pond.After inoculation of activated sludge is carried out to start the improved UCT step-feed process of an activated sludge system, a second-segment anoxic reactor and a third-segment anoxic reactor are inoculated with Anammox sponge filler, and efficient denitrification and dephosphorization of low-carbon-source urban sewage are achieved by adjusting the water intake ratios of all segments, inflow water C/N and the actual anoxic zone hydraulic retention time and enhancing the denitrification ammoxidation technology of the system.The dosage of an organic carbon source is greatly reduced while aeration energy consumption is saved, and the disposal cost of residual sludge is reduced.

The invention discloses a biochemical treatment technology for viscose waste water with a physico-chemical method and a CASS (Cyclic Activated Sludge System) method, which belongs to the field of the water environment protection and particularly relates to the materialized and biochemical combined treatment technology of acid and alkaline waste water in the viscose industry. The biochemical treatment technology is mainly used for solving the phenomenon that the Zn2<+>, CODcr (chemical oxygen demand) and chroma removal of the viscose waste water is substandard. In the biochemical treatment technology, the flow process comprises acidification analytic stripping, a neutral reaction, flocculation sedimentation and CASS pool biochemistry; CODcr and chroma are lowered by the acidification analytic stripping, and CS2 and H2S gas are precipitated; 10-15% of lime slurry is added for neutralization; a pH value is regulated to 9-10; flocculant and coagulant aid are added; Zn2<+> ions and most suspended matters are removed by the flocculation sedimentation; effluent processed with the physico-chemical method enters a CASS pool biochemical period; and supernate is discharged after the treatment of feeding water for 2-3 hours, aerating for 6-7 hours, precipitating for 0.5-1 hour, draining water for 2-2.5 hours and leaving unused for 0.5-1 hour. The biochemical treatment technology is mainly used for the comprehensive standard discharge treatment for the acid and alkaline waste water in the viscose industry.

The invention discloses an analogy method based on an activated sludge purification process of a HPP lattice gas cellular automaton model, comprising the following steps: setting up a corresponding initial model in an activated sludge system and initializing a cellular state; setting a boundary point; and ensuring an evolution rule according to the initial model. The method comprises the reaction process of particles; and the reaction process comprises particle absorption, particle catabolism, particle anabolism and endogenous respiration. Based on an artificial life system and the HPP lattice gas cellular automaton model, the invention designs the evolution rule of an activated sludge cell automaton and realizes the evolution, simulates a circumstance that microorganism absorbs and decomposes organic matters, well simulates the logarithmic phase, the decelerating grow phase and the endogenous respiration phase of an activated sludge growth model curve, well simulates the degradation curve of BOD organic matters, and has a directive function for further recognizing and understanding the saprobia settlement process.

The invention discloses a treatment method for dye intermediate para-ester production wastewater. The treatment method comprises the following steps: feeding the wastewater into a MVR (mechanical vapor recompression) evaporation system to concentrate and separate high-temperature sodium sulfate, carrying out mixed oxidation on concentrated liquor and chlorine monoxide, and then sequentially carrying out bubbling, dechlorination and filtering on the obtained product; after the obtained wastewater is subjected to water distribution and compound nutrients are added, feeding into a UASB (upflow anaerobic sludge blanket) tower to carry out anaerobic biological treatment, then feeding into a vertical oxidation tank, after the biochemical treatment and aeration of photosynthetic bacteria, feeding water discharged from the vertical oxidation tank into a CASS (cyclic activated sludge system) pool which contains sanitary sewage sludge strains and is provided with an aeration device and carrying out aeration biochemical treatment; and finally, carrying out precipitation on the obtained product. According to the treatment method disclosed by the invention, in accordance with the characteristics of high concentration organic wastewater, high salt, and complicated compositions of para-ester production wastewater, under the interaction of the steps, the para-ester production wastewater can be subjected to high-speed, high-efficiency and low-running-cost treatment, discharged water reaches GB8978-96 standards, and the COD (chemical oxygen demand) is less than 500 mg/L.