145 results about "Upflow anaerobic sludge blanket digestion" patented technology

An integrated bioreactor and its applications as well as a method for treatment of highly-concentrated organic wastewater using the same. The integrated bioreactor with a concentric columnar structure includes an inner layer and an outer layer, in which the inner layer is an upflow anaerobic sludge blanket (UASB) and the outer layer is a moving bed biofilm reactor (MBBR). The effluent of the MBBR is recycled into UASB via a reflux pump mounted between a water tank and the integrated bioreactor. A water outlet of the UASB is arranged with an on-line pH monitor and a mechanical agitation device is arranged on the top of a bottom water distributor. The bioreactor is low in cost, features friendly maintenance, stable operation, and high degree of automation, and can be applied under low temperature.

Disclosed is a comprehensive treatment method of livestock and poultry breeding wastewater, which adopts the following three steps that: firstly, an upflow anaerobic sludge blanket treater (3) is used for anaerobic biological treatment and killing bacteria and viruses. Secondly, an improved moving bed biomembrane treater (6) is used for aerobic biological treatment, a longitudinal clapboard (12) is added into the treater (6) to partition the treater into an aerobic zone (13) and a solid-liquid separation zone (10), an air pump (7) is used for increasing oxygen while guiding the sewage, and a simultaneous nitrification and denitrification method is used to remove total nitrogen (TN) and decompose organics under the action of microorganisms. Thirdly, a chemical reaction method is adopted to remove P and N in the sewage, after the former two steps of treatment, mass P and N with a certain amount still exist in the sewage, liquid magnesium oxide is again added for generating magnesium ammonium phosphate precipitates, and the supernatant is discharged when reaching the standards. The method has advantages of speediness, land saving, energy saving, complete material transfer, small influence under external conditions and good purification effects when treating wastewater.

The present invention is the anaerobic treatment, aerobic treatment and membrane treatment process of domestic garbage percolate, and belongs to the field of sewage treating technology. The combined treating process is completed in four units including a two-stage upwards flowing anaerobic sludge bed, an immobilized microbial biological aeration filter, a coagulating and settling pond and a nanometer filtering membrane. The present invention has the advantages of simultaneous elimination of carbon, nitrogen and other pollutants, high treating effect, high load impact resistance and high stability. The present invention may be also applied in treating other waste water with high ammonia nitrogen content, high organic pollutant concentration and great water quality fluctuation.

The invention discloses a method by using an up-flow anaerobic sludge blanket - biomemebrane reactor to quickly cultivate anaerobic ammonium oxidation bacteria, comprising the following steps: enriched microorganisms are preserved in an internal membrane of a UASB reactor; garbage landfill is selected for treating activated sludge during the leachate SBR process as seed sludge, and seeded sludge quantity is 45 to 65 percent of effective volume of the reactor; a constant temperature circulating water bath is adopted to maintain temperature of a reaction zone to be 1 DEG C higher or lower than 32 DEG C; waste water is synthesized by adoption of manpower, and waste water components comprise NH4Cl, NaNO2, MgSO4, KH2PO4, CaCl2, NaHCO3, a microelement I and a microelement II; mass ratio of NH4<+>-N and NO2<->-N during the process of water distribution is controlled to be ranged from 1 to 1.0 to 1 to 1.6; PH value of influent is adjusted to be 7.4 to 7.8. The invention has the advantages of simple technology, stable system operation, high nitrogen removal rate, short acclimation concentration time and so on.

The invention discloses a process for reusing waste leachate and a device thereof. Which comprises a homogenization process stage, an anaerobic process stage, an aerobic process stage 1, an advance oxidization stage, an aerobic process stage 2 and a reverse osmosis desalination stage.The device comprises the following equipments connected in series by pipes in turn: a water regulating tank, a collecting well, an up-flow anaerobic sludge bed reactor, a reaction tank for continuous and interval aerating, an ozonation system, a membrane biological reactor, a middle tank in which a water pump is arranged, a reverse osmosis system in which a pump, a precise filter and reverse osmosis component are arranged as well as a clean water tank.The beneficial effects of the invention lie in that: a plurality of organic matters which are difficult to degrade can be effectively resolved; a whole set of processes such as the anaerobic process, the aerobic process, the advance oxidization process and the microfiltration are used as pretreatments of the reverse osmosis(RO) system and the water quality index fully meets the water quality requirements of the reverse osmosis system. The last desalination is carried out by using reverse osmosis system to ensure the water quality index reused by the leachate.

A bioreactor for treating sewage has a concentric structure, which is composed of the internal anaerobic region consisting of water inlet tube, water distributor, anaerobic reactor, three-phase separator, reflux unit and depositing area, and the external aerobic region comprising water distributor, air distributor, up-flow area, dow-flow area and deposit separating area. Its advantages are less possessed ground and high effect.

The invention relates to a method for treating leachate, which is mainly used for treating town refuse landfill leachate and high-concentration industrial wastewater, and belongs to the technical field of environmental protection. A device for realizing the method comprises a regulating reservoir, a flocculation settling pond, an anaerobic reactor, a membrane bioreactor, a nanofiltration membrane and a reverse osmosis membrane, wherein the anaerobic reactor is an up-flow anaerobic sludge blanket (UASB) or an up-flow sludge blanket filter (UBF); and the membrane bioreactor comprises an anoxic zone and an aerobic zone. The method has high removing rate of CODcr, BOD5, suspended matters (SS) and ammonia nitrogen in the leachate; the device has the advantages of compact structure to reduce occupied land, convenient assembly, quick startup and reduction in debugging time; various membrane modules adopt a modular mode so as to contribute to maintenance and replacement; effluent meets the index requirements of 'Standard for Pollution Control on the Landfill Site of Municipal Solid Waste' (GB 16889-2008); and the effluent can be collected for recycling on occasions having low requirements on water quality.

The invention discloses a system and a method for treating waste water and sewage containing sulfate radicals. The system comprises an anaerobic chamber, an anoxic biofilter and an aerobic biofilter, wherein the anaerobic chamber is provided with an up flow type anaerobic sludge bed used for reducing sulfates into sulfides, and the anaerobic chamber is communicated with the anoxic biofilter so as to make the sulfides flow in the anoxic biofilter, and the anoxic biofilter is used for the autotrophic denitrification reaction; the sulfides formed in the anaerobic chamber denitrifies the nitrates; and the anoxic biofilter is communicated with the aerobic biofilter used for nitratlon reaction, the aerobic biofilter is provided with a clarification zone on the upper part, the filtered water flows to the clarification zone, the bottom part of the clarification zone of the aerobic biofilter is communicated with the anoxic biofilter so as to reflux the water on the bottom part of the clarification zone to the anoxic biofilter for denitrification, and the clean water is discharged from the top part of the clarification zone. When the system and the method for treating the salt containing sewage utilize the up flow type anaerobic sludge bed to effectively remove organic substances in the sewage and remove nitrogen by the autotrophic nitrification and denitrification, no residual sludge is generated; and the equipment for heating or generating ultrasonic wave is not necessary, and the cost is reduced.

A method for processing brewery waste that includes receiving spent grain, low strength wastewater and high strength wastewater. The spent grain, low strength wastewater and high strength wastewater is processed with a plug flow anaerobic digester to produce a first output. A portion of the first output is processed with an upflow anaerobic sludge blanket digester to produce a second output. A portion of the second output is processed with a fixed-film anaerobic digester to produce a third output.

The invention relates to an advanced nitrogen removal method for treating late landfill leachate with an upflow anaerobic sludge blanket (UASB), anoxic/oxic (A/O) and anaerobic ammonia oxidation reactor (ANAOR) combined process, and belongs to the field of biological nitrogen removal. The following difficult problems exist in late landfill leachate treatment: due to high ammonia nitrogen content, total nitrogen in outlet water is unlikely to meet the standard; a carbon source often needs to be additionally added, so that the landfill leachate treatment cost is greatly increased. The late landfill leachate is treated with the UASB, A/O and ANAOR combined process, and a biological treatment technology is enhanced, so that the landfill leachate treatment cost is reduced to the maximum extent. Through short-cut nitrification-anaerobic ammonia oxidation coupling, without additionally adding the carbon source, the removal effect and efficiency of ammonia nitrogen and total nitrogen are improved and a problem that ammonia nitrogen and total nitrogen in the outlet water of the late leachate do not meet the standard is solved. The method can be widely applied to treatment of high-ammonia-nitrogen-content wastewater and is especially suitable for treating the late landfill leachate filled for more than 5 years in urban garbage landfill sites.

The invention provides a method for treating chitin waste water, wherein the method comprises the following steps of: (1) conveying soda boiling water and pickling waste water into a first-level coagulation tank for first-level coagulation sedimentation; (2) conveying yielding water of the step (1) and washing waste water into a regulating tank; (3) conveying the yielding water in the regulating tank into a second-level coagulation air floatation tank; (4) conveying the yielding water of the step (3) into an up-flow anaerobic sludge blanket; (5) conveying the yielding water of the step (4) into a hydrolysis acidification tank, and carrying out hydrolysis acidification; (6) conveying the yielding water in the hydrolysis acidification tank into a contact oxidization tank; (7) carrying out partial reflux of the yielding water in the contact oxidization tank to the hydrolysis acidification tank; and (8) conveying the residual yielding water in the contact oxidization tank into a three-level coagulation sedimentation tank for coagulation sedimentation, and discharging the obtained clean water. According to the invention, the waster water in the production of chitin is treated comprehensively, the treating expense is lowered, and the yielding water is superior to the first level discharge standard stipulated by Integrated Waste Water Discharge Standard of People's Republic of China (GB8978-1996).

The invention relates to a pretreatment method for high-acid inferior crude oil processing wastewater. The method comprises the following steps of: treating electric desalting wastewater in the process of refining the high-acid inferior crude oil by using an oil removal-demulsification-gas dissolving floatation-up-flow anaerobic sludge bed reactor-intermittent activated sludge process combined process; and performing biochemical treatment on effluent obtained through treatment, or treating the effluent obtained through treatment by an additionally built secondary biochemical treatment unit, and discharging the treated effluent after the treated effluent reaches a discharge standard, wherein the demulsification is carried out under the condition that the pH value is 5-6. In the method, thehigh-acid inferior crude oil electric desalting wastewater is effectively treated by a proper treatment method, the treatment of sewage of other sources is not impacted, a benefit is brought to the stable operation of oil removal, floatation, biochemical and advanced treatment units in the finally sewage field, and the method is favorable for stably reaching the standard, and treating and recycling the high-acid inferior crude oil processing wastewater.

The invention relates to the technical field of sewage treatment and discloses a system suitable for treating high concentration organic wastewater. The system comprises a feed hopper (1), a homogenizing tank (2), a biogas tank (3), an up-flow anaerobic sludge bed (4), a cyclic activated sludge bioreactor (5), a microelectrolysis reactor (10), a baffled biological aerated filter (BBAF) (6) and an ozone disinfection tank (7), which are connected in sequence, wherein the biogas tank is connected with a sludge thickening tank (8); a biogas purification and storage gas supply system comprises a gas-water separator (91), a biogas desulfurizer (92), a first flame arrester (931) and a gas storage tank (94) in sequence; and the gas-water separator (91) is also connected with a gas supercharging device (95), a second flame arrester (932) and a waste heat recovery device (96). The system and the method have the beneficial effects that the process is simple; the concentration gradient in the reaction process is large, so that sludge bulking is not easy to happen; the system has strong load impact resistance and good treatment effects; and the simultaneous denitrification and dephosphorization effects of the BBAF are obvious by adjusting the cycle of operation and controlling the working procedure time length.

The invention discloses a treatment process for waste water in neuropeptide product production. According to the treatment process, floating oil is separated and removed by adopting an oil separating tank; hydrolytic acidification is carried out on the waste water by adjusting a hydrolytic acidification tank; polluted suspended materials in the waste water are subjected to mixed flocculation reaction in an air floatation precipitation machine under the action of a compound flocculant and a coagulant aid; after flocs and precipitates are removed, the waste water flows into an upflow anaerobic sludge blanket reactor and is subjected to anaerobic reaction through high-efficiency anaerobic bacteria to remove most COD cr (chemical oxygen demand cr) from the waste water; harmful gas in the water discharged from the upflow anaerobic sludge blanket reactor is blown by a pre-aeration tank; the waste water flows into a contact oxidation tank to remove organic substances through biochemical reaction in an aerating manner; the BOD5 (biochemical oxygen demand 5) is reduced; finally, the waste water flows into a secondary precipitation tank to enable solid to be separated from liquid, and supernatant precipitated by the precipitation tank is discharged externally after meeting a three-level standard. The treatment process is simple in structure and easy to implement; the quality of treated water meets an external discharging requirement, and the environment is protected.

The invention provides a culture method for chromium-resisting anaerobic ammonia oxidation granule sludge.The method comprises the steps that an up-flow type anaerobic sludge bed reactor is adopted, anaerobic ammonia oxidation granule sludge is adopted as an inoculating source, model wastewater containing ammonia nitrogen and nitrite is used as feed water, culture is performed on the condition that the anaerobic and light shielding environment is provided, the temperature is 35+/-1 DEG C, the feed water pH is 8.10+/-0.14 and the hydraulic retention time is 1.0-1.5 h till the nitrogen removal efficiency is stabilized to be 80% or above, then K2CrO4 is added into the feed water in the reactor for chromium-resisting culture, and culture of the chromium-resisting anaerobic ammonia oxidation granule sludge is finished.The chromium-resisting anaerobic ammonia oxidation granule sludge cultured through the method can maintain the high activity and nitrogen removal rate in the process of treating wastewater containing low-concentration chromium, can also remove low-concentration chromium in the wastewater, and is good in granule sludge character.

The invention discloses an anaerobic ammonia oxidation/denitrification coupling treatment method for greenhouse turtle breeding wastewater. The method comprises the following steps: naturally settling the greenhouse turtle breeding wastewater, adding sodium nitrite, controlling a concentration ratio of nitrite nitrogen and ammonia nitrogen in the wastewater to be 0.8-1.3, continuously and uniformly pumping the wastewater into an up-flow type anaerobic sludge bed reactor from the bottom, performing anaerobic ammonia oxidation/denitrification coupling treatment, maintaining the hydraulic retention time to be 12 hours, wherein the reaction temperature is 30+/-2 DEG C, and discharging the wastewater from the upper part of the reactor through gas-liquid-solid three-phase separation. The method is simple in process and low in operating cost; according to the synergistic effect of ammonia oxidation and denitrification, carbon and nitrogen can be synchronously and efficiently removed, the denitrification efficiency is high, the removal rate of ammonia nitrogen and total nitrogen in the greenhouse turtle breeding wastewater is more than 80 percent, and the removal rate of chemical oxygen demand is more than 50 percent. The method is suitable for advanced treatment of typical greenhouse turtle breeding wastewater in China.

The invention discloses an antibiotic residue treatment and utilization technological method. The method comprises the following steps: performing hydro-thermal treatment on antibiotic residues to allow the moisture content of the residues to be 90 to 95 percent and the temperature to be between 100 and 110 DEG C; directly performing pressure filtration on the residues subjected to the hydro-thermal treatment without cooling, setting the material feeding pressure at 1.0 to 1.2 MPa, the pressure filtering pressure at 1.4 MPa and the pressure filtering time at 1.5 to 3 h, and dividing the pressure-filtered residues into a pressure-filtered mud cake with the moisture content of 30 to 55 percent and residue filtrate with a COD content of 24,000 to 65,000 mg/L; drying and smashing the pressure-filtered mud cake to allow the moisture content of the dried residue particles to be reduced to 20 percent or less than 20 percent, and performing pyrolysis treatment and anaerobic digestion. Through'hydro-thermal pretreatment+ pressure-filtering dewatering+ upflow anaerobic sludge bed digestion of supernate+ anaerobic pyrolysis of a high-dryness mud cake', the antibiotic residue treatment and utilization technological method realizes reducing, harmless and recycling treatment of the antibiotic residues.

The invention discloses a standard discharge treatment system for livestock and poultry waste water and a method thereof, the method comprises the following steps: pretreating livestock and poultry waste water with high concentration in a pre-treatment pool; introducing the treated livestock and poultry waste water in a first stage anaerobic reactor, continuously stirring in the reactor, then fermenting to obtain biogas; reacting and introducing in a secondary anaerobic reactor through an outlet pipe, completing water distribution, performing gas production and three-phase separation in an upflow anaerobic sludge blanket; introducing the processed effluent in a first stage biochemical treatment system for processing, performing solid-liquid separation; and then introducing a supernatant in a secondary biochemical treatment system for processing. According to the invention, two stage anaerobic reactors and two stage biochemical treatment systems are combined for performing high efficiency anaerobic fermentation and aerobic operation treatment on the livestock and poultry waste water, so that renewable energy biogas is generated, and treatment for livestock and poultry waste water standard discharge can be simultaneously realized, and the materials have the advantages of reliable quality, low cost, obvious energy effect, energy saving and environmental protection.

The invention provides a novel combined process for treating chemical wastewater. The process adopts a regulating tank, an improved Fenton fluidized bed, a degassing neutralizing tank, a coagulative precipitation tank, an up-flow anaerobic sludge bed and an SBR (sequencing batch reactor), wherein the units are connected by a water pipe in sequence to treat the chemical wastewater. The novel combined process has the beneficial effects that the process is optimized and is clear and concise in route; the overall COD (chemical oxygen demand) removal rate is not less than 95%; the removal rate of characteristic organic pollutants is not less than 95%; and the process is convenient to operate and manage, is stable and is low in investment and operating costs.

The invention provides a method for domesticating sulfate-resistant type anaerobic ammonium oxidation bacteria by manually configuring wastewater under a proper condition. The method disclosed by themethod adopts a manner of increasing the sulfate concentration of the artificial wastewater step by step, so that the anaerobic ammonium oxidation bacteria adapt to the high-sulfate environment and the output water reaches the standard. Each sulfate concentration domestication cycle is 4 days, domestication adopts an upflow anaerobic sludge bed (UASB) reactor, and the flora cultivated by the method are suitable for treating high-sulfate high-ammonia-nitrogen wastewater. The method has the following beneficial effects: the growth and reproduction requirements of the anaerobic ammonium oxidationbacteria are met completely, the anaerobic ammonium oxidation bacteria can gradually adapt to the sulfate radical environment with certain concentration within short time, the cultivated culture cantreat the wastewater containing high-concentration sulfate radical (such as monosodium glutamate wastewater) and is suitable for large-scale cultivation and commercialized application, the activity and the adaptability of the culture are enhanced, and good environment and economic effects are achieved.

The invention discloses a culture method for high-performance synchronously denitrifying and desulphurizing anaerobic sludge. The method comprises the following steps: inoculating anaerobic ammonia oxidized granular sludge into an up-flow type anaerobic sludge bed reactor, adjusting substrate concentration and hydraulic retention time, and running till the removal efficiency of both sulfide and nitrite in effluent reaches up to above 90%, thereby acquiring the synchronously denitrifying and desulphurizing anaerobic sludge. Taking autotrophic denitrification sludge as the inoculating sludge canstart an anaerobic ammonia oxidation technology, and anaerobic ammonium oxidation bacteria and some chemoautotrophic denitrifying bacteria can coexist in a bioreactor; the anaerobic ammonium oxidation bacteria and the denitrifying bacteria are autotrophic bacteria and both require no additional carbon source, so that additional carbon source for maintaining a survival condition of microorganismsneed not be considered during a starting period, no chemical sludge is generated and the method is economical and environment-friendly; the maximal removal loads of sulfide and nitrite finally acquired according to the invention respectively reach up to 105.5kg.m-3.d-1 and 28.45kg.m-3.d-1.