1355 results about "Waste water treatment plant" patented technology

The invention discloses a large-scaled culture method of high-concentration nitrosobacteria and application thereof. The method comprises the following steps of: (1) adding an enrichment culture solution with initial ammonia nitrogen mass concentration of 30-500mg/L in a reaction device with functions of stirring, heating and aeration; preparing activated sludge of a waste water treatment plant in activated sludge of 0.5-20% for primary inoculation to conduct the enrichment culture of the nitrosobacteria by 2-6d as a culture cycle, wherein extra ammonium salts and a growth promoter are added during the enrichment culture of the nitrosobacteria; (2) ending the culture when the concentration of NO2-N in the solution is accumulated to reach 70-95% of the concentration of total nitrogen; adding a flocculating agent for flocculation and sedimentation; and allowing to stand still to remove supernate, and then adding the enrichment culture solution to start the culture of the second cycle; and (3) continuously conducting 3-8 cycles of the enrichment culture to obtain the high-concentration nitrosobacteria. By adopting the nitrosobacteria to strengthen the bi-nitrification treatment of ammonia nitrogen contained waste water, the method has the advantages of high stress resistance, low cost and high efficiency and is suitable for the complicated treatment of ammonia nitrogen contained industrial waste water.

The invention provides a method and a system for treating a VOCs gas in a sewage treatment plant, and is based on a VOCs gas absorption-desorption system, a combustion and waste heat recycling system and a wastewater treatment system. The method comprises the following specific steps: feeding a low-concentration VOCs gas in the sewage treatment plant through the VOCs gas absorption-desorption system so as to obtain a concentrated VOCs gas; combining the concentrated VOCs gas with a high-concentration VOCs gas and gases output from an anaerobic treatment unit in the sewage treatment plant to be introduced into the combustion and waste heat recycling system; introducing a certain amount of fuel and a waste gas methane generated in the wastewater treatment system so as to sufficiently combust the VOCs gas; after combustion, recycling the heat by using a waste heat boiler, feeding a part of cleaned fume at an outlet to the VOCs gas absorption-desorption system to desorb the low-concentration VOCs gas, and combining the other part of the cleaned fume with tail gases of an absorption-desorption device to be fed into a chimney for discharge.

A composite adsorbent of attapulgus clay-aluminum hydroxide/iron nano-scale and a preparation method and application thereof are provided. The composite adsorbent is characterized in that prepared by loading aluminum hydroxide or mixture of hydroxides of aluminum and iron on the surface of attapulgus mineral, the aluminum hydroxide or the mixture of hydroxides of aluminum and iron has a content of 5-50wt% in the adsorbent; and the content of aluminum hydroxide in the mixture is not lower than that of iron hydroxide. The composite adsorbent has high adsorption capacity to P, As and F in water, and can be used for deep dephosphorization treatment of waste water from domestic sewage treatment plants, dephosphorization of eutrophic water bodies and treatment of high-As or high-F ground water.

The invention discloses a treatment method for biological nitrogen removal of reinforced sewage, which comprises the following steps of: 1, feeding all or partial treated sewage and sludge refluxed from a secondary sedimentation tank into a reflux sludge denitrification unit together by adopting division point inflow; 2, feeding the outflow of the reflux sludge denitrification unit and the residual sewage to an anaerobic unit or an anoxic unit; 3, feeding the outflow of the anaerobic unit to the anoxic unit, and refluxing the mixed solution of an aerobic unit to the anoxic unit; 4, feeding the outflow of the anoxic unit to a transition unit; 5, feeding the outflow of the transition unit to the aerobic unit, and refluxing the mixed solution of the aerobic unit to the anoxic unit from the outflow end of the aerobic unit; and 6, feeding the outflow of the aerobic unit to the secondary sedimentation tank to perform sludge-water separation. The method can be operated in multiple modes of A-A2O, nitrogen removal AO, inverse AAO and the like and has high controllability, and a system has strong nitrogen removal capability. The method is suitable for upgrade and reform of newly built sewage treatment plants of towns lacking the land and the conventional sewage treatment plants.

The invention belongs to the technical field of environmental protection, and particularly relates to a method for modifying and dewatering sludge. The method provided by the invention comprises the following steps: adding water to sludge which is subjected to primary dewatering by a sewage treatment plant, thereby enhancing the flowability of the sludge; adding fine particles with high water permeability into the sludge, and evenly stirring; adding a polymeric flocculant into the mixture, so that the fine particles are coated by the sludge to form a complicated structure; and finally, pumping the mixture into a plate-and-frame filter press to carry out pressure filtration, thereby obtaining a secondary dewatered filter cake of which the water content is lower than 60%. The invention has the advantages of stable technique, simple process, low price of additive materials, low operating cost, and short pressure filtration time; heavy metals in the sludge precipitate in the sludge due to the coprecipitation action; and the effluent water of pressure filtration is clear.

In a method of drying a moist bulk material, such as sewage sludge, and treating the malodorous moisture-laden gas resulting from the drying process, the moisture-laden gas is introduced into waste water contained in a waste water clarifying basin of a waste water treatment plant. A system for carrying out the method includes a drying apparatus and at least one waste water basin of a waste water treatment plant, connected so that the moisture-laden gas emitted from the drying apparatus can be introduced, for example through an aerator, into the waste water. Thereby, the gas is cooled, demoisturized and deodorized, and moisture and volatile components are condensed and/or dissolved out of the gas into the waste water. The waste water is beneficially oxygenated, heated, and enriched with organic substances.

The invention discloses a device which can realize the shortcut nitrification of sludge-digestion liquid through the combined control of FA and FNA. The device is provided with a raw water box, a shortcut nitrification reactor, a sedimentation tank and a water tank; the shortcut nitrification reactor is divided into a hypoxia stirring area and an aerobic zone, and a DO/pH online controller is arranged in the aerobic zone; an air-blast-head is arranged at the bottom of the reactor; a method utilizing the device to realize the shortcut nitrification comprises the following steps: firstly, a system is started; and secondly, the adjustment is carried out in running; the invention is applicable to the nitrification of the sludge-digestion liquid of a sewage treatment plant, the structure of the device is simple, the process of the method is simple, the operation is convenient, a plurality of carbon sources are saved, the nitrification speed is fast, and the effect is good.

The invention relates to a two-chambered alga microbial fuel cell and treatment wastewater method of low energy consumption thereof, belonging to the field of wastewater treatment. The invention resolves the problem that the current aerobic biological treatment process has large energy consumption and high cost because of adopting the imposed aeration. An anode chamber of two-chambered alga microbial fuel cell is connected with a cathode chamber thereof through a diaphragm; a vacuum pad is arranged on the position among the diaphragm, the anode chamber and the cathode chamber; the anode chamber is provided with an anode and the cathode chamber is provided with a cathode; the anode and the cathode are connected with an external circuit by a lead wire, wherein the external circuit is positioned outside the two-chambered alga microbial fuel cell. The method comprises the following steps: firstly, a reactor is started; secondly, the wastewater enters into the cathode chamber and the anode chamber, the microorganism degrades to metabolize organics and simultaneously gets electrical energy under the room temperature; cathode alga provides oxygen for the cathode chamber by the photosynthesis. The alga microbial fuel cell can be the main structure of wastewater and aerobic treatment, which can replace the roles of an aeration tank, a biological filter, an aeration oxidation pond and the like in a wastewater treatment factory so as to reduce the energy consumption of the aerobic biological treatment.

The invention discloses a high-efficiency composite filter aid for sludge dewatering. The raw material components and weight percentages are: 20%-30% of Al2O3, 40%-55% of SiO2, 2%-8% of CaO, and 3%-3% of bentonite. 13%, iron powder 4% ~ 10%; on this basis, Fe2O3 3% ~ 10%, MgO 0.6% ~ 2%, K2O 1% ~ 2.5%, Na2O 0.1% ~ 0.7%. Adding the high-efficiency composite filter aid with a mass percentage of 2% to 6% to the precipitated sludge can reduce the water content to 40% to 50%, without using special drying equipment. The invention has high dehydration efficiency, low cost, simple process and no secondary pollution, and is suitable for centralized treatment of sludge in various sewage treatment plants.

The invention relates to a method for reclaiming fluorine-containing and ammonia nitrogen-containing waste water in electronic industry. In the method, waste water passes through a three-in-one integral device formed by the sequential series connection of a waste water treatment plant treating process, a water works treating process and a pure water treatment plant treating process to obtain reclaimed water. The device for implementing the waste water treatment plant treating process comprises a conditioning tank, a reaction tank and a clarifying tank; the device for implementing the water works treating process comprises a quartz sand filter tank, an ozone contact tank and an activated carbon filter tank; and the device for implementing the pure water treatment plant treating process comprises an ultrafiltration membrane device and a cleaning-resistant reverse osmosis membrane device, and thick water produced by the cleaning-resistant reverse osmosis membrane device can be reclaimed or not to obtain the reclaimed water according to the reclamation rate requirement and environmental impact assessment requirement of a reclamation customer. The reclaimed water treated by the invention has stable and favorable quality, meets and surpasses the leading indicators of GB5749-2006 Standards for Drinking Water Quality issued by China, and can be used as primary pure water for industrial production.

The invention provides an AALOO multipoint water feeding synchronization denitrification and dephosphorization process. All pretreated wastewater Q1 enters an anaerobic tank, then flows through an anoxic tank, a low oxygen tank, a short-term aerobic tank and a precipitation tank sequentially, and then is discharged from the precipitation tank. Partial pretreated wastewater Q2 directly enters the low oxygen reaction tank, then flows through the short-term aerobic tank and the precipitation tank sequentially, and then is discharged from the precipitation tank. One part of precipitated sludge flows back to the anaerobic tank, and the other part of the precipitated sludge is discharged from the precipitation tank as excess sludge. Mixed liquid return channels are arranged between the low oxygen reaction tank and the anoxic tank, and the mixed liquid return channels are also arranged between the short-term aerobic tank and the low oxygen reaction tank. A returned sludge contact reaction region is arranged on the front end of the anaerobic tank, and water feeding points are arranged both on the front end region and the rear end region of the anaerobic tank. The method has a simple flow, and is adaptable to wastewater quality change, and is capable of removing nitrogen and phosphorus from wastewater with low carbon source and low oxygen consumption. The method is applicable to rebuilding or building of a municipal wastewater treatment plant which has nitrogen and phosphorus removing requirements.

The invention discloses a biological complex enzyme for sludge recycling and a use method thereof. The biological complex enzyme for sludge recycling is broad spectrum complex enzyme extracted from dozens of North American native natural plants. The sludge treated with the biological complex enzyme is dehydrated, mixed with humus earth for pelletizing and desiccated to obtain complex soil, and the soil not only can cure heavy metal and organic pollutants but also can be used as basis material of various facilities such as roof, rainwater garden, ecological water drainage system and the like, so that the sludge treatment problem of the sewage treatment plant is effectively solved.

The invention relates to a method for filtering and separating suspended maters from water and a filtering device used in the method. According to the concrete technology, a filter screen of the filtering device is directly arranged in water flow in a water flow channel; the included angle a is formed between the filtering surface of the filter screen and the water flow direction of the surface of the filtering surface, wherein the included angle a can be an acute angle between 0 and 70 DEG or an obtuse angle between 110 DEG C and180 DEG; and the filter screen of the device and different water flow channels form different cross flow filtering systems. The method and device provided by the invention can be widely applied to lake blue-green algae, sewer liquid dung, sewage treatment plants and vegetable drug extraction.

An intelligent method is designed for predicting the effluent ammonia-nitrogen concentration in the urban wastewater treatment process (WWTP). The technology of this invention is part of advanced manufacturing technology, belongs to both the field of control engineering and environment engineering. In order to improve the predicting efficiency, a recurrent self-organizing neural network, which can adjust the structure and parameters concurrently to train the parameters, is developed to design this intelligent method. This intelligent method can predict the effluent ammonia-nitrogen concentration with acceptable accuracy and solve the problem that the effluent ammonia-nitrogen concentration is difficult to be measured online. Moreover, the online information of effluent ammonia-nitrogen concentration, predicted by this intelligent method, can enhance the quality monitoring level and alleviate the current situation of wastewater to strengthen the whole management of WWTP.

The invention relates to a sewage processing method of mud backflow digestion and reduction, which is mainly characterized in that in the system of a sewage processing plant, a primary deposition pool uses an anaerobic deposition pool 2, original sewage 1 flows into an anaerobic deposition pool 2, the outlet water 3 of the anaerobic deposition pool enters a sewage processing system 4, the sewage processing system discharges purified water and simultaneously inputs residual mud 5 to the anaerobic deposition pool 2, the lower part of the anaerobic pool 2 is an accumulated mud deposition area of which the volume satisfies the volume for stabilizing and reducing the total accumulated mud amount in the mud staying period. The mud is stayed in the anaerobic deposition pool for a long time to achieve the purpose of cleaning and discharging out stabilized and reduced mud in the design deadline. The method simplifies technology, saves investment, has simple technical operation and control, realizes the reduction and the stabilization of the mud, and improves the inlet water biochemical stability of sewage processing.

The invention discloses a polyurethane/polyurea composite protective layer and a preparation method thereof, and application of the polyurethane/polyurea composite protective layer in concrete shielding. The polyurethane/polyurea composite protective layer comprises a concrete base layer, a polyurethane elastic layer and a polyurea layer from bottom to top. The preparation method comprises the following steps: treating the surface of the concrete, and forming the polyurethane elastic layer by a multiple brushing or spraying method until reaching the designed thickness; and after the surface of the last brushing or spraying polyurethane layer becomes dry, spraying at least one polyurea layer to form the polyurethane/polyurea composite protective layer. The invention can be used for combined shielding of concrete surfaces in track traffic, parking lots, airports, roofs, road surfaces, playgrounds, sewage treatment plants, harbors, navigation locks, waterways, bridges, tubular piles and the like. The invention combines the elasticity, toughness and low price of the polyurethane with the shock resistance, wear resistance, corrosion resistance, aging resistance and other characteristics of the spraying polyurea to obtain the composite protective layer which has the advantages of excellent water resistance, excellent corrosion resistance, excellent shock resistance, high cost performance and high construction speed.

The present invention relates to a technology which can efficiently concentrate a suspension liquid which needs to be concentrated in sewage treatment plants or various waste water treatment plants, particularly sludge or the like which contains a large amount of odor components which will adversely be decayed and is hard to concentrate. The present invention can prevent odor substances from being produced in a concentration process, and can remarkably reduce the amount of odor components, carbonic acid, and the like contained in concentrated sludge or a lower separated liquid. Specifically, in a process of concentrating or dewatering residual evaporated substances in a liquid, when sludge is held under a reduced pressure of 5 to 70 kPa for less than 15 minutes, a portion of gas components dissolved in the liquid is changed into gaseous phase, and activation of microorganisms in the liquid is restricted. After a decompressing process is performed under the reduced pressure, the liquid is introduced into a gravity concentration tank for gravity concentration, or the decompressed liquid or the gravity-concentrated sludge is introduced into a flocculation reaction tank for flocculation, and is then dewatered by a dewatering device.

The invention relates to MOF materials for adsorbing phosphate anions. The MOF materials are taken as adsorbents to be applied to adsorption of the phosphate anions in a water solution, and have remarkable adsorptivity on the phosphate anions. Several MOFs materials are respectively added in phosphorous water of different concentrations and phosphorous water of different pH values to be stirred for 1-120 min, the phosphorus removal rate can be up to 90-99%, and the processed MOFs materials have no phosphorus desorption phenomenon and secondary pollution on environment. The several MOFs materials have the advantages of being large in specific surface area, high in adsorption capacity, high in dephosphorization efficiency, small in usage amount, simplicity, safety, high efficiency and low cost. The invention relates to phosphorus removal application of industrial wastewater, lake water, tail water discharged by sewage treatment plants, and aquaculture wastewater.

The invention relates to a method for preparing a magnetic charcoal material, a device adopting the method and application. The method comprises the following steps that sewage treatment plant sludgeis subjected to high-temperature anaerobic pyrolysis, and sludge charcoal is obtained; then dry fine grinding is carried out, and charcoal powder is obtained; the sludge charcoal powder is subjected to dry magnetic separation, a magnetic material is obtained, granules obtained after humidifying and pelleting are subjected to high-temperature sintering in protective atmosphere, and sintered materials are obtained; furnace cooling is carried out, and the magnetic charcoal material of a porous structure is obtained. According to the method, the magnetic material is separated out of the sludge pyrolysis product charcoal and is used for preparing the magnetic charcoal material, the magnetic charcoal material is used for efficiently adsorbing and removing quinolone antibiotics such as ciprofloxacin, recycling utilization of the sludge charcoal is achieved, the preparation cost of the adsorption materials is reduced, the process is simple, high practicality is achieved, and good economic benefits and environmental benefits are achieved.

The invention discloses a system and a method for deeply treating chemical wastewater and biochemical tail water, belonging to the technical field of wastewater treatment. The system comprises a physicochemical treatment system and a biochemical treatment system, wherein a distribution reservoir, a coagulating reaction tank, a sedimentation tank, an ozone oxidation reactor and a buffering tank in the physicochemical treatment system are connected in sequence; and the biochemical treatment system comprises a biological activated carbon filter, a drain tank and a sludge thickening tank. In the method, the pH value of the wastewater is regulated, and then, effluent is obtained after being sequentially subjected to coagulation, sedimentation, ozone oxidation and biological filter treatment, wherein part of sludge can be used as a catalyst to be recycled. Potassium permanganate and aluminum salt are used as a pre-oxidant and a coagulant, and manganese dioxide generated through reaction is used as an oxidant, an adsorbent, a catalyst and a reaction crystal nucleus, so that organic matters are further degraded, and the sludge settleability is improved. The effluent obtained through treating the wastewater by using the method disclosed by the invention can completely conform to the grade-A discharge standard of a wastewater treatment plant.

The invention discloses a method for producing a wastewater denitrification carbon source through lactic acid fermentation of kitchen waste, and belongs to the technical field of solid waste resourceful treatment. The method comprises the steps of adopting kitchen waste as a raw material; sorting and impurity removal, controlling the solid-to-liquid ratio, grinding, pulping, and carrying out quality-based and phase-splitting treatment; after the waste oil is heated and recycled, the residual garbage slurry is injected into an anaerobic fermentation tank for batch lactic acid fermentation, after fermentation is finished, solid-liquid separation is carried out, lactic acid-containing supernatant can be directly used as a liquid carbon source in the sewage denitrification stage, a good biological denitrification effect is achieved, nitrogen-containing residues can be collected and recycled, and full recycling is achieved. According to the invention, kitchen waste is directly used for efficient open lactic acid fermentation; according to the method, the indigenous microbial flora in the kitchen waste is fully utilized to hydrolyze the substrate and efficiently and directionally convertthe substrate into lactic acid, exogenous nutrition and industrial enzyme preparations do not need to be added, the process is simple, the production cost is low, a cheap carbon source is provided for a denitrification section of a sewage treatment plant while resource utilization of the kitchen waste is realized, and the biological denitrification efficiency is improved.

The invention provides a composite microbial biogen capable of degrading organic waste efficiently and a preparation method and applications thereof. The composite microbial biogen contains Bacillus circulans, Bacillus subtilis, Alcaligenes faecalis and Penicillium diversum. The composite microbial biogen can be used with activated sludge for the existing sewage treatment equipment; under the synergetic effect, the yield of excess sludge can be greatly reduced, the aims of emission reduction and energy saving can be realized and the sludge problem which is difficult to overcome for a long time in sludge treatment is effectively solved; and the biogen has importanct economic importance and environmental importance and is suitable for each sewage treatment plant. The composite microbial biogen can also be used to prepare organic wastewater purifying agents, activated sludge enhancers of urban domestic wastewater and deodorants used in tipping sites, public places, agricultural product market, kitchens, bathrooms and the like.