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1536 results about "Municipal sewage" patented technology

Municipal sewage: Sewage from a community which may be composed of domestic sewage, industrial wastes or both. Municipal Sludge: Semi liquid residue that remains from the treatment of municipal water and wastewater.

Liquid-solid circulating fluidized bed waste water treatment system for simultaneous carbon, nitrogen and phosphorus removal

Biological nutrient removal (BNR) in municipal wastewater treatment to remove carbonaceous substrates, nutrients and phosphorus, has recently become increasingly popular worldwide due to increasingly stringent regulations. Biological fluidized bed (BFB) technology, which could be potentially used for BNR processes, can provide some advantages such as high efficiency and compact structure. This present invention incorporates the fixed-film biological fluidized bed technology with the biological nutrient removal in a liquid-solid circulating fluidized bed, which has achieved the simultaneous elimination of organic carbon, nitrogen and phosphorus, in a very efficient manner and with very compact space requirements. The BNR-LSCFB has two fluidized beds, running as anoxic/anaerobic and aerobic processes to accomplish simultaneous nitrification and denitrification and to remove carbonaceous substrates, nutrients and phosphorus, with continuous liquid and solids recirculation through the anoxic/anaerobic bed and the aerobic bed. The new BNR-LSCFB system is not only an excellent alternative for conventional activated sludge type BNR technologies but is also capable of processing much higher loadings and suitable for industrial applications.
Owner:UNIV OF WESTERN ONTARIO

Device and method for nitrogen and phosphorus removal for low CN ratio urban sewage through nitrosation and anaerobic ammonia oxidation coupling denitrifying phosphorus removal intensification

ActiveCN103663862AUnified denitrificationUnified phosphorus removal processMultistage water/sewage treatmentMunicipal sewageAmmonia
The invention discloses a device and a method for nitrogen and phosphorus removal for low CN ratio urban sewage through nitrosation and anaerobic ammonia oxidation coupling denitrifying phosphorus removal intensification, and belongs to the field of biological sewage treatment. The device comprises an urban sewage raw water tank, a denitrifying phosphorus removal reactor, an adjusting water tank, a sedimentation tank, and an integrated partial nitrification and anaerobic ammonia oxidation reactor; when the urban sewage enters the denitrifying phosphorus removal reactor, phosphorus-accumulating bacteria utilizes organic carbon source in the urban sewage for anaerobic phosphorus release, sedimentation and water drainage are performed, the amount of output water is adjusted by the adjusting water tank, then the output water enters the integrated partial nitrification and anaerobic ammonia oxidation reactor, contained NH4<+>-N is converted into N2 to be effectively removed through partial nitrification and anaerobic ammonia oxidation, contained PO4 <3-> and a small amount of NO3<->-N produced in the anaerobic ammonia oxidation flow back with the output water to the denitrifying phosphorus removal reactor for denitrifying phosphorus removal, and then micro-aeration is carried out for a period of time. The method reduces oxygen consumption and energy consumption, improves the nitrogen and phosphorus removal rate, and avoids the problem of insufficient carbon source.
Owner:贵州筑信水务环境产业有限公司

Quick start method for anaerobic ammonia oxidation bioreactor for urban sewage

ActiveCN101343116AKey Issues to Reduce Startup DifficultiesSolve the key problems of starting difficultiesTreatment with anaerobic digestion processesMaterial consumptionMunicipal sewage
Disclosed is a quick startup method of an urban sewage anaerobic ammonium oxidation bioreactor, which belongs to the fields of urban sewage disposal and resource utilization. The method aims to solve the problems of high energy and material consumption, and difficult startup of the anaerobic ammonium oxidation process applied to the urban sewage denitrogenation treatment of the current urban sewage biological denitrogenation method. The method comprises: adopting a biomembrane filter chamber system under normal temperature, directly inoculating anaerobic ammonium oxidation bacteria, making the biomembrane filter chamber system adapt to the acclimation and amplification environment of anaerobic ammonium oxidation bacteria through adjusting the equipment operation parameters of the reactor, and rapidly realizing the successful startup of the urban sewage anaerobic ammonium oxidation biological autotrophic denitrogenation reactor. The method applies a new discovery in science of quick startup of the reactor implementing a simple process of anaerobic ammonium oxidation biological autotrophic denitrogenation to the high-efficiency and low-consumption denitrogenation treatment of urban domestic sewage for the first time, and has the advantages of short startup period of the reactor, stable system operation, excellent effects of sewage disposal and low cost.
Owner:BEIJING UNIV OF TECH

Biological drying method for treating dewatered sludge of urban sewage plant

The invention discloses a biological drying method for treating dewatered sludge of an urban sewage plant, and belongs to the technical field of solid waste treatment. The method comprises the following steps: adding an alkaline cracking agent into the dewatered sludge, uniformly mixing, adding a conditioning agent, and adding an inoculating agent for inoculation or utilizing a biological drying finished product for reflux inoculation; after uniformly stirring the mixture, placing the mixture in a biological drying reactor, and introducing residual heat, wherein the temperature of hot wind is between 80 and 120 DEG C, the ventilation amount of each 1kg of mixture is between 15 and 150 L/h, and the temperature of the reactor is between 50 and 60 DEG C; connecting a hot wind outlet to a gas drier, removing moisture, and treating and discharging residual gas; and performing once mechanical stirring for 3 to 5 minutes per hour, and treating 3 to 5 days to obtain the treated sludge. The residual heat adopted by the method has wide source; a drying product can be used for fueling, fertilizing, preparing a soil modifying agent or directly dumped; the drying time is remarkably reduced; and the biological drying method has the advantages of simple technology, low cost, economy and high efficiency.
Owner:TSINGHUA UNIV

Process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation

The invention provides a process and method for denitrification and phosphorus removal of municipal sewage by half shortcut nitrification and anaerobic ammonium oxidation, which belongs to the technical field of sewage biological treatment. The process comprises an untreated water tank, a sequencing batch reactor (SBR) for removing organic matters, a first regulating water tank, a half shortcut nitrification SBR, a second regulating water tank and an autotrophic denitrification upflow anaerobic sludge blanket (UASB) reactor sequentially connected in series. Sludge is separated according to sludge age, which avoids an influence of rapid propagation of heterotrophic bacteria to autotrophic denitrification flora; and a nitrification system adopts half shortcut nitrification, which stably maintains shortcut more easily, ensures the nitrosification rate of the nitrification system, and provides guarantee for denitrification stability of the system. The anaerobic ammonium oxidation technique is applied to deep denitrification treatment of domestic sewage, which reduces the oxygen consumption by 60% compared with the conventional denitrification method, is free of additional carbon sources and neutralizers, and realizes high-efficiency low-energy consumption municipal sewage treatment.
Owner:BEIJING UNIV OF TECH

Process and device for treating sewage through denitrification and dephosphorization by anaerobic-anoxic-oxic-anoxic (AAOA) plus membrane bioreactor (MBR) process

The invention belongs to the technical field of the treatment of municipal sewage, and discloses a process and a device for treating sewage through denitrification and dephosphorization by an anaerobic-anoxic-oxic-anoxic (AAOA) plus membrane bioreactor (MBR) process. A rear anoxic tank is arranged on the basis of the traditional anaerobic-anoxic-oxic (A<2>/O) process flow; meanwhile, a membrane separation technology is used for substituting two sedimentation units of sedimentation tanks; according to the process, pre-treated sewage flows into an anaerobic tank, an anoxic tank and the rear anoxic tank respectively; and the sewage flows into an MBR tank through the anaerobic tank, the anoxic tank, an aerobic tank and the rear anoxic tank, is filtered by an MBR membrane component and is drained. By the process for treating the sewage, a carbon source in the sewage can be efficiently utilized by arranging the rear anoxic tank and changing influent and reflux modes, so that the denitrification and dephosphorization efficiency of the sewage is improved; and meanwhile, the membrane separation technology is used for increasing the concentration of activated sludge in the process for treating the sewage so as to realize the high-efficiency separation of mud and water in the sewage, so that the problems that the conventional process for treating the sewage is high in energy consumption, the floor area is large, and pollutants such as nitrogen, phosphorus and the like cannot be efficiently removed are solved. The water quality of effluent treated by the method meets the requirements of I-class A criteria of Integrated Wastewater Discharge Standard (GB 8978-1996).
Owner:GUANGZHOU MUNICIPAL ENG DESIGN & RES INST CO LTD

Technology and method for treating urban sewage by three-section short-cut nitrification/ anaerobic ammonia oxidation

The invention provides a technology and a method for treating urban sewage by three-section short-cut nitrification/ anaerobic ammonia oxidation, and belongs to the technical field of biological treatment of sewage. A raw water tank, an organic substance removal sequencing batch reactor (SBR), a first regulating water tank, a short-cut nitrification SBR (provided with an on-line monitoring and feedback control system), a second regulating water tank and an autotrophic nitrogen removal up-flow anaerobic sludge bed/ blanket (UASB) reactor are sequentially connected in series in the technology; and the sludge is separated according to the sludge age, so that the contradiction between denitrification and phosphorus removal sludge age is solved. By applying the real-time control technology of the short-cut nitrification SBR to the autotrophic nitrogen removal technology, the problems that the half short-cut of low ammonia nitrogen short-cut nitrification in continuous flow is difficult to maintain, the concentration ratio of ammonia nitrogen to nitrous in the effluent is difficult to control and the like are solved. By successfully applying the anaerobic ammonia oxidation technology todeep denitrification treatment of the domestic sewage, urban sewage treatment with high efficiency and low energy consumption is realized.
Owner:上海立源生态工程有限公司

Method for producing marsh gas through mixed anaerobic fermentation of blue algae and sludge

The invention provides a method for producing biogas by the anaerobic fermentation of mixed blue algae and sludge, which belongs to the technical field of environmental protection purification and waste resource treatment. In the method, the blue algae and the sludge are mixed for the anaerobic fermentation to produce the biogas, and the whole process is completed in an anaerobic reactor; the blue algae and the sludge are mixed in the rector, N2 is introduced to form the anaerobic state, and the blue algae and the sludge are fermented at a temperature of between 35 and 37 DEG C; and in the rector, the blue algae is discontinuously and periodically added, the degradation condition of the material is observed, at the same time, the organic matter concentration of the discharged material and the concentrations of CH4 and CO2 in gas generated from fermentation are measured until the reactor is stably operated. The biogas generated is subjected to desulphurization treatment and supplied to users for combustion or collected for power generation; and the dregs generated are used as a fertilizer for farmlands. The method for producing the biogas by the anaerobic fermentation of the mixed blue algae and the municipal sludge has the advantages of having the effect of answering multiple purposes, thoroughly eliminating algae toxins, combining the blue algae utilization and the treatment of the sludge from a municipal sewage plant, and solving organic pollution problems in both the rural and urban areas.
Owner:JIANGNAN UNIV

Method for biologically purifying municipal sewage and recovering resources

The invention discloses a method for biologically purifying municipal sewage and recovering useful resources. The method comprises the following steps of: 1) discharging excess sludge into a sludge activation tank to perform aerobic aeration; 2) discharging the activated sludge and the raw sewage into a sludge adsorption tank to perform aerobic aeration; 3) precipitating sludge-water mixed solution in a precipitation tank, putting supernatant into a sewage treatment system, purifying the supernatant, then discharging the sewage, and purifying the excess sludge circularly; 4) mixing the sludge at the bottom of the precipitation tank with the sludge in an anaerobic digestion tank to perform anaerobic fermentation; 5) converting an organic substance after the anaerobic fermentation into methane gas and recovering the methane gas; 6) discharging the supernatant into a crystallizing pond, adding a magnesium salt into the crystallizing pond, adjusting the pH value to ensure that the mixture is turned into guanite deposit, and recovering the guanite deposit; 7) putting the supernatant in the crystallizing pond into the sewage treatment system; and 8) discharging the excess sludge after the anaerobic fermentation. By using the excess sludge to treat the municipal sewage, the method not only solves the problems in sewage purification, makes use of pollutants in the sewage, but also realizes sludge disposal and extracts effective resources in the sewage.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

System and method for treating municipal sewage through short-cut denitrification-anaerobic ammonia oxidation after short-cut nitrification-anaerobic ammonia oxidation

The invention discloses a system and method for treating municipal sewage through short-cut denitrification-anaerobic ammonia oxidation after short-cut nitrification-anaerobic ammonia oxidation and belongs to the field of sewage biological treatment. The system comprises a raw water tank, an organic matter removal and dephosphorization SBR reactor, a short-cut nitrification SBR reactor, an anaerobic ammonia oxidation granular sludge UASB reactor, a second regulating water tank and a short-cut denitrification-anaerobic ammonia oxidation UASB reactor. All functional floras are subjected to advantageous culture in different reactors according to respective growth characteristics, so that a sludge age contradiction between denitrification and dephosphorization is solved, and stability of the treatment system is enhanced; real-time control is applied to the short-cut nitrification SBR reactor to solve the problem that short-cut nitrification with a low ammonia and nitrogen level is hard to maintain stably; water discharged from the short-cut nitrification reactor and water discharged from the organic matter removal reactor are mixed to solve the problem that continuous flow half short-cut nitrification is hard to maintain; short-cut denitrification-anaerobic ammonia oxidation is used for further treatment of water discharged from the anaerobic ammonia oxidation reactor to solve the problem that nitrate nitrogen is generated during anaerobic ammonia oxidation.
Owner:BEIJING UNIV OF TECH

Combined pre-treatment method for improving sludge disintegration effect and strengthening subsequent anaerobic digestion

The invention belongs to the technical field of solid waste treatment, in particular relates to a combined pre-treatment method for improving sludge disintegration effect and strengthening subsequent anaerobic digestion, comprising the following concrete steps of: gravity settling and thickening residual sludge generated in a secondary settling tank of a municipal sewage treatment plant, sending the thickened sludge into an ultrasonic reactor for ultrasonic irradiation and adding NaOH; sending the sludge into a sludge anaerobic digestion reactor for subsequent medium temperature anaerobic digestion after the combined action of ultrasonic and NaOH; and collecting methane generated by digestion and measuring the yield of the methane with a gas collection device. The method firstly uses ultrasonic and NaOH jointly for sludge treatment, the soluble COD concentration in sludge liquid phase after treatment is improved by about 52 times, the methane yield is improved by 40.6 percent, and the problem of limited application of ultrasonic due to high energy consumption is largely overcome; and the method is applicable to the treatment of residual sludge in sewage treatment plants, and can be achieved by making corresponding modification on the current treatment facilities of sewage treatment plants for different-scale sewage treatment plants, thus having wide application prospect.
Owner:TONGJI UNIV +1

High-efficiency low-consumption retexture method for urban sewage

The invention relates to a high-efficiency and low-consumption recycling and treating method for urban sewage, belonging to the technical field of treating and reusing the urban sewage, which aims to solve the problem of poor effects of dephosphorization and denitrogenation in prior art. The recycling and treating method in the invention is characterized in that: first, biological phosphorus removal is conducted for the pretreated sewage, meanwhile, the organic substance is also removed; then, the biological autotrophic denitrogenation is carried out, thus completing the recycle and treatment of the sewage. The biological autotrophic denitrogenation can be implemented in six ways: first, the sewage with the phosphorus removed biologically enters a nitrous acid biofilter, and then enters an ANAMMOX activated sludge reactor; second, the sewage enters a nitrous acid activated sludge reactor and subsequently enters an ANAMMOX biofilter; third, the sewage enters the nitrous acid biofilter, and then enters the ANAMMOX biofilter; fourth, the sewage enters the nitrous acid activated sludge reactor before entering the ANAMMOX activated sludge reactor; fifth, the sewage enters a single-segment biofilter reactor; and sixth, the sewage enters a single segment activated sludge reactor. The recycling and treating method for urban sewage in the invention has the advantages of good effect of sewage treatment, and low treatment costs.
Owner:BEIJING UNIV OF TECH

Device for anaerobic removal of organic matters in municipal sewage and denitrification of autotrophic organism and method

ActiveCN101580329ACarbon richEfficient biological phosphorus removalWaste based fuelTreatment with anaerobic digestion processesChemistryMunicipal sewage
The invention relates to a device for anaerobic removal of organic matters in municipal sewage and denitrification of autotrophic organism and a method. The device is provided with an original water tank, an anaerobic reactor, a dephosphorization reactor, an intermediate sedimentation tank, a semi-short distance nitration reactor, a secondary sedimentation tank, an intermediate water tank and an anaerobic ammonium oxidation reactor; wherein, the anaerobic reactor is an anaerobic biological filter filled with sponge fillers; a first grid chamber of the dephosphorization reactor is an anaerobic area, and the other four grid chambers are aerobic areas; the semi-short distance nitration reactor is provided with one anoxic area and four aerobic areas; the anaerobic ammonium oxidation reactor is provided with a columnar reactant and a water bath sleeve. The method utilizing the device comprises: 1) activated sludge obtained from a sewage treatment plant is put into the dephosphorization reactor and the semi-short distance nitration reactor; 2) the municipal sewage is firstly pumped into the anaerobic reactor; 3) the water output by the anaerobic reactor enters the dephosphorization reactor; 4) the water output by the dephosphorization reactor enters the semi-short distance nitration reactor through the intermediate sedimentation tank. The invention is applicable to municipal sewage treatment, and has the advantages of complete structure, advanced technique and high efficiency.
Owner:BEIJING DRAINAGE GRP CO LTD

Sludge fuelization treatment process of urban sewage treatment plant

InactiveCN102827661AImprove mechanical dehydration performanceReduce energy consumptionSludge treatmentBiofuelsPhysical conditioningFiltration
The invention discloses a sludge fuelization treatment process of an urban sewage treatment plant, and provides a sludge treatment technology which can substantially reduce the energy consumption of a sludge fuel production technology, shorten the required time of the treatment process and greatly reduce the cost. The invention has the technical scheme that the dehydrated sludge in the urban sewage treatment plant is subjected to a step of chemical and physical conditioning, a step of microwave radiation conditioning, a step of press filtration and dehydration, a step of granulation, a step of microwave heating for drying in order to obtain the sludge fuel with water content being 5-10% and lower calorific value being 4000-5000 kilocalorie. The invention is characterized in that the sludge is subjected to the step of chemical and physical conditioning and the step of microwave radiation conditioning, thereby the mechanical dewatering performance of the sludge can be substantially improved, the required press filtration time accounts for about 30% of the conventional press filtration dehydrated time; the method of microwave heating for drying is employed, the required time of sludge drying process is substantially shortened in only 30-45 minutes, so that the energy consumption in the drying process is reduced by 40%.
Owner:YANSHAN UNIV

Method for increasing sewage-reinforced biological phosphor-removing effect by resource utilizing mud organic substance

This invention belongs to new style green technology region, concretely relates to a method of using sludge organic matter to advance biologic dephosphorization effect of sewage. Excess sludge at basicity condition is carried out anaerobic fermentation to produce organic acid; adopt guano precipitation means to reclaim nitrogen and phosphorus of organic acid; add the treatment fluid after reclaiming nitrogen and phosphorus to municipal sewage, under anaerobic-aerobic condition aerobic conditito carry out biological sewage treatment,through solid-liquid separation, the out water reaches the mark and is discharged. This invention through the method of adding excess sludge broth to sewage, not only advance the ability of microbe of synthesizing poly- hydroxy valeric acid(PHV)under anaerobic condition, advance availability of poly- hydroxy eicosanoic acid, decrease glycogen metabolization quantity, in favor of maintaining higher dephosphorization effect at aerobic condition, reduce phosphorus concentration in the out water, prevent water substance eutrophication occurring, but also decrease sludge volume, thereby decrease sludge treatment cost and pollute to environmental.
Owner:TONGJI UNIV

Device and method for rapidly realizing and stably maintaining shortcut nitrification in continuous flow process

A device for realizing and maintaining shortcut nitrification in a continuous flow process is successively provided with a water inlet tank, an aeration system and a precipitation system, wherein the water inlet tank is communicated with a completely hybrid reaction tank through an intake pump and the completely hybrid reaction tank is communicated with a precipitation tank through a pipeline. The reaction tank is provided with a DO probe and a pH probe. Data is transmitted to a PLC control system through a DO\pH online detecting instrument and the PLC control system is connected with an air compressor. In an intermittent starting stage, the PLC control system can timely close a switch of the air compressor according to variation characteristics of DO and pH values. In a stable maintenance stage, the PLC control system can adjust an opening or a rotational speed of the air compressor in real time and control a DO concentration in the reaction tank within an optimized scope. This invention realizes rapid starting and stable maintenance of the shortcut nitrification and resolves a problem that starting of the shortcut nitrification in the continuous flow process is difficult in treating municipal sewage and the shortcut nitrification is difficult to be re-implemented. The invention is mainly used to realize the shortcut nitrification of the municipal sewage or wastewater containing high ammonia nitrogen in the continuous flow process, and saves the aeration energy consumption.
Owner:彭永臻
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