109 results about "Activated sludge" patented technology

A method and apparatus for treating wastewater using a sequencing batch reactor wherein the biological solids are densified through hydraulic and organic selection pressures. Wastewater is introduced to the reactor near the end of the treatment cycle under anaerobic conditions following the effluent withdrawal step and prior to the start of next treatment cycle. A floating sludge withdrawal apparatus is used in conjunction with a floating surface mixer to selectively remove lighter flocculant solids and retain denser solids by temporarily reducing the mixing energy during the wasting process.

This invention discloses a start-up method for a sulfur autotrophic activated sludge process, comprising: inoculation of activated sludge; internal circulation of activated sludge; a first stage of sulfur autotrophic denitrification acclimatization, wherein the supernatant recirculation ratio of the first stage is ≥400%, and the influent flow rate of nitrate nitrogen wastewater is ≤40% of the design flow rate; a second stage of sulfur autotrophic denitrification acclimatization, wherein the supernatant recirculation ratio of the second stage is greater than or equal to the supernatant recirculation ratio of the first stage; and a third stage of sulfur autotrophic denitrification acclimatization, wherein the supernatant recirculation ratio of the third stage is greater than or equal to the supernatant recirculation ratio of the second stage. The start-up procedure ends after the effluent nitrate nitrogen removal rate reaches the required level. According to the method of this invention, by combining a high proportion of recirculation with low load and low influent nitrate nitrogen wastewater, sufficient agitation of the sludge can be achieved, improving the proliferation rate of sulfur autotrophic denitrifying microorganisms while avoiding sludge loss, thus enabling rapid start-up in UASB denitrification denitrification units with a small to medium aspect ratio.

This invention relates to the field of wastewater comprehensive utilization technology and discloses a water purification processor for power plant circulating cooling water. The processor comprises, in sequence, a denitrification tank, a secondary sedimentation tank, a flocculation sedimentation tank, an ozone contact oxidation tank, a BAF booster tank, a BAFDN tank, a BAFDC tank, a BAF permeate tank, a fiber disc filter, and a purified water tank. The denitrification tank is connected to the circulating water discharge via a pump, and a submersible mixer is fixedly installed inside the denitrification tank. To stably and efficiently remove total nitrogen from wastewater and ensure stable and controllable denitrification, this water purification processor for power plant circulating cooling water installs a submersible mixer in the denitrification tank, along with a first carbon source dosing device, to precisely control the dissolved oxygen (DO) in the tank to ≤0.5 mg / L, creating an anoxic environment. Simultaneously, a sludge return pump from the secondary sedimentation tank returns activated sludge to the denitrification tank to maintain a stable sludge concentration, thereby achieving stable total nitrogen removal and laying the foundation for subsequent advanced treatment.

The application provides a preparation method of a porous material loaded with mixed microorganisms, comprising the following steps: S1, preparation of a mixed bacteria suspension; S2, preparation of an activated sludge porous material; and S3, preparation of a porous material loaded with mixed microorganisms. The application also provides a preparation method of an oil-wetting and water-repellent activated sludge porous material loaded with microorganisms, which comprises spraying a hydrophobic silica particle suspension on the porous material loaded with mixed microorganisms to obtain a modified material which is oil-wetting and water-repellent. The porous material loaded with mixed microorganisms and the oil-wetting and water-repellent activated sludge porous material loaded with microorganisms can effectively degrade medium and long chain alkanes in oil, especially n-hexadecane.

A waste water treatment plant for processing waste water is provided. The waste water treatment plant includes: a bioreactor including: an inlet zone for containing untreated wastewater and a concentrate, and an aeration zone with gas feeders, a filter for generating a filtrate and a concentrate, and a mechanism to transfer the concentrate from the filter to the inlet zone.

The utility model discloses a detachable aeration device, including the air intake main pipe of setting in the activated sludge pool upper end, the branch pipe of vertical setting in the air intake main pipe below, the aeration pipe of setting in the branch pipe lower extreme, be equipped with the aeration micropore on the aeration pipe. Can solve the problem of the micropore on the existing aeration device easy to block and not easy to replace and clean after blocking.

This invention discloses an AF-modified ABR anaerobic treatment process for high-concentration dairy wastewater. It relates to the field of wastewater treatment technology. The process involves passing wastewater into a pre-AF unit for degreasing, deproteinization, and preliminary hydrolysis and acidification to obtain the first effluent. This first effluent is then passed into a three-stage modified ABR reactor, consisting of an acidification reaction section, a hydrogen and electricity generation reaction section, and a methanogenesis reaction section, for stepwise anaerobic treatment. The hydrogen and electricity generation reaction section employs an air cathode structure without a proton exchange membrane, utilizing electrons generated from the oxidation of organic matter in the wastewater to reduce oxygen, thereby generating electricity and powering the system itself. The ABR effluent is then passed into an electrochemical purification unit, where it undergoes deep purification through iron-carbon micro-electrolysis and micro-nano aeration before being discharged in compliance with standards. Simultaneously, a portion of the activated sludge from the methanogenesis section is recycled to the pre-AF unit and / or the hydrogen and electricity generation reaction section, combined with external enrichment culture and gradient temperature control, to form a gradient adaptation system of psychrophilic-mesothermic composite bacteria.

This application relates to a novel sedimentation tank, specifically in the field of sludge treatment technology. The novel sedimentation tank includes a sedimentation tank with a residual sludge zone, a return sludge zone, a sorting zone, and a sludge screen. Activated sludge enters the sorting zone from the top. A first conveying component is located at the bottom of the sorting zone to transport the activated sludge from the bottom of the sorting zone to the residual sludge zone. A second conveying component is located at the top of the sorting zone to transport the activated sludge from the top of the sorting zone to the sludge screen. The sludge screen then transports the heavier activated sludge to the return sludge zone. The coordinated operation of these components allows for the screening of activated sludge discharged from the biological treatment system, removing activated sludge with poor settling properties while allowing the better settling properties to be reused. This avoids reduced wastewater treatment efficiency due to the deteriorated settling properties of the activated sludge reused in the biological treatment system.

The utility model relates to a kind of activated sludge performance detection diagnosis device, it is related to water treatment technical field, to solve the problem of greater error in sludge activity performance detection in prior art, greater artificial cost.The utility model's activated sludge performance detection diagnosis device, including cabinet, touch screen being set in the cabinet, pump unit, sensor, graduated cylinder unit, control unit and information acquisition unit for operating the activated sludge performance detection diagnosis device;The pump unit is used to extract sludge in biochemical pool and pump to the graduated cylinder unit, the sensor and the information acquisition unit are used to collect and analyze the performance information of sludge sample in the graduated cylinder unit, and feedback on the touch screen.The utility model can reduce artificial cost, reduce artificial error, improve the accuracy of detection.

The application discloses a sludge active bacteria screening method coupled with high-flux Raman detection and morphological identification, and belongs to the technical field of microorganism screening and culture. The sludge active bacteria screening method provided by the application comprises the following steps: adding a pollutant to be degraded into a sludge sample, and activating active bacteria; using an isotope to label the activated sludge sample; diluting the labeled sample, screening and collecting active bacteria groups by using a high-flux flow Raman sorting instrument; using a digital cloning picking instrument to perform morphological screening on the obtained active bacteria groups, and then culturing and enriching single strains screened. The application can realize one-time accurate acquisition of functional bacteria groups with high metabolic activity and high strain diversity, and significantly improves the screening efficiency and quality.

The utility model discloses a kind of activated sludge reduction treatment devices, including horizontal track, horizontal transfer mechanism and spraying mechanism, the side wall of the horizontal track is provided with the longitudinal driving assembly of control horizontal track longitudinal movement, the horizontal transfer mechanism includes support, the driving motor of setting in support side wall, the driving motor output end and along the horizontal track movement of setting main drive wheel and setting in support side wall and being carried in the auxiliary wheel of horizontal track top, the side wall of the support is provided with fixed plate, the bottom of the fixed plate is provided with plough, the spraying mechanism includes active substance storage tank, and the feeding pump in communication with active substance storage tank, and the distribution pipe in communication with feeding pump and the spraying pipe in communication with distribution pipe, the utility model, by plough to the sludge of different positions in industrial wastewater pool is stirred, facilitate active substance and sludge fully contact, improve the reaction efficiency of active substance and sludge.

------20 / 04 / 2565------(OCR) Increased control and efficiency in wastewater purification (II) can be achieved by creating conditions that allow operators to specifically prioritize the digestion functions of microorganisms in activated sludge. Return sludge with gas dispersion (36) is created using reactive gases (37) which are mixed with sludge (21) to create a gas-liquid mixture which is then passed through an atomizer (24) or a cavitation pump (22) to immediately convert the reactive gases (37) into an ultrafine bubble state. At least some of these ultrafine bubbles are dissolved within the return sludge with gas dispersion (36), activating the dormant microorganisms. Because there are no completely or nearly completely biodegradable materials in the return sludge with gas dispersion (36), the microorganisms prioritize their digestion functions and, upon contact with biodegradable pollutants present in the wastewater (11), digest the pollutants using different biochemical pathways than those used in nature. ------------ DEPCT65 Increased control and efficiency over wastewater (11) Purification can This is done by creating conditions that allow operators to prioritize their selections. The importance of microbial digestion in activated sludge, sludge return, and gas distribution (36). It is created using reactive gas (37) which is mixed with sludge (21) to create a gas mixture and The liquid is passed through a water jet (24) or a cavitation pump (22) to immediately produce a reactive gas (37) that is bubbly. In a very fine state, at least a portion of the ultra-fine air bubbles will be dissolved within the sludge. Returning gas distribution (36) stimulates dormant microorganisms due to the absence of biodegradable material. Completely or nearly completely biological in sludge return gas distribution (36) microorganisms Prioritize digestion and exposure to present biodegradable pollutants. In wastewater (11), microorganisms break down pollutants using different biochemical pathways than those used in nature. -----------------------------------------------------------

This invention discloses a method for modifying an integrated rural wastewater treatment equipment suitable for sedimentation effluent treatment, relating to the field of wastewater treatment technology. Given the significant seasonal variations in water quality and quantity in rural wastewater, current methods typically employ anaerobic / anoxic / aerobic suspended activated sludge operation. This approach cannot maintain sludge content, concentration, and activity under conditions of long-term, large fluctuations in influent water quality and quantity. Based on the seasonal characteristics of rural wastewater, this invention utilizes an anaerobic / anoxic / aerobic activated sludge operation mode under high-load influent conditions and an anaerobic + microaerobic sludge bed operation mode under low-load influent conditions. By flexibly implementing a load-regulating rural wastewater operation mode according to water quality and quantity, this achieves efficient treatment of rural wastewater.

This invention discloses a method for efficiently extracting and enriching sludge-based antimicrobial peptides from activated sludge, belonging to the field of activated sludge resource recycling and utilization. The invention removes impurities from the activated sludge by releasing intracellular and extracellular proteins through low-temperature hot alkaline hydrolysis, followed by enzymatic hydrolysis with proteases to obtain a crude extract containing peptides of different molecular weights. Further purification involves primary purification to remove impurities and secondary purification to separate amino acids and peptides from the organic matter mixture, yielding purified antimicrobial peptide products of different molecular weights. Antimicrobial activity is assessed using an inhibition zone assay, resulting in a highly effective antimicrobial sludge-based antimicrobial peptide molecular template. This template is used to prepare a magnetic molecularly imprinted polymer (Fe3O4@MIPs). Fe3O4@MIPs are then used to adsorb and enrich the highly effective antimicrobial sludge-based antimicrobial peptides in the crude extract. After elution with an eluent, highly effective antimicrobial sludge-based antimicrobial peptides are obtained.

The application relates to the technical field of wastewater treatment, in particular to an integrated domestic wastewater rapid purification reaction device. The device comprises a protection box, an equipment area and a treatment area are arranged in the protection box, an aeration equipment is arranged in the treatment area, a bearing frame is arranged above the aeration equipment in the treatment area, inclined plates in linear and annular array distribution are fixed to the bearing frame, the inclined plates in annular array distribution are fixed to each other, a filter module is arranged in the bearing frame, and a first guide frame is fixed to the bearing frame. When purifying the wastewater, the inclined plates shield the surging wastewater, buffer the wastewater, reduce the disturbance to the filter module, and through the cooperation of the inclined plates and the first guide frame, a semi-closed environment is formed, the power of the activated sludge is weakened, the activated sludge is not moved at will after being placed in the inclined plates and the first guide frame, and the amount of the activated sludge entering the filter module area is reduced.

The present application relates to sewage biological treatment technical field, specifically discloses a kind of process for treating antibiotic wastewater of composite microorganism-MBR membrane joint processing.The present application provides a kind of process for treating antibiotic wastewater of composite microorganism-MBR membrane joint processing, by COD gradient rise and removal rate control, directional acclimation and toxicity screening are carried out to activated sludge, and microbial community that is impacted by sulfamethoxazole is built;Further introduce the composite bacterial liquid of marine afipia felis and rhodopseudomonas coprophila composition, realize the synergistic degradation to high COD and sulfamethoxazole under suitable pH condition, so that COD removal rate still remains stable at higher level when concentration increases;End cooperate MBR membrane separation, high-efficiency biodegradation and high-efficiency solid-liquid separation are coupled to realize the efficient removal of sulfamethoxazole and COD in wastewater under low drug consumption, near neutral conditions.

The application discloses a kind of based on activated sludge heterotrophic bacteria cultivation and sulfur autotrophic directional domestication bacterial agent and wastewater treatment method, the bacterial agent mainly with municipal wastewater treatment plant surplus activated sludge as raw material, first through heterotrophic bacteria cultivation to improve sludge activity and biomass, then under the synergistic effect of elemental sulfur, sodium bicarbonate and nitrate, sulfur autotrophic denitrification directional domestication is carried out, and efficient, stable, impact-resistant composite denitrification bacterial population is formed;The mature bacterial population after separation, purification, mixed expansion is made into bacterial agent, directly added to actual wastewater treatment project, to realize the depth denitrification of wastewater.The application does not depend on single strain, does not use expensive reagent, completely from ordinary activated sludge, using two-stage precise domestication process, retains the natural synergy of bacterial population, has the advantages of fast start, low cost, salt and low temperature tolerance, without additional carbon source, stable operation, etc., can significantly improve the denitrification efficiency and stability of wastewater treatment system.

This utility model relates to the field of wastewater treatment technology, and in particular to a tank-type complete wastewater treatment equipment, comprising: a treatment tank, the interior of which is divided into four fan-shaped areas along the circumference, and arranged sequentially along the wastewater flow direction as an anaerobic tank, an aerobic tank, an MBR membrane tank, and a clear water tank. The bottom of the anaerobic tank is equipped with a multi-layer annular water distribution structure to prevent short-circuiting and ensure that the sludge is fully suspended and evenly contacts the wastewater. The aerobic tank is equipped with a swirling disturbance mixing structure to drive efficient mixing of activated sludge and dissolved oxygen. The bottom of the MBR membrane tank is equipped with a pulse disturbance structure. Through the synergistic effect of multi-layer water distribution, swirling mixing, and pulse disturbance, the problems of poor adaptability to flow fluctuations, low mixing and mass transfer efficiency, and severe membrane fouling in existing technologies can be solved, achieving efficient and stable operation of the wastewater treatment system and energy saving. Simultaneously, it improves sludge mixing efficiency, oxygen utilization rate, and membrane antifouling performance.

This invention discloses a method for improving methane yield from anaerobic fermentation of rice straw using potassium-enriched biochar. The method includes the following steps: rice straw is alkalized, then anaerobic activated sludge and potassium-enriched biochar are added, followed by sealed fermentation. The mass ratio of rice straw, anaerobic activated sludge, and potassium-enriched biochar is 20:(10-30):(1-2). This invention uses rice straw as a fermentation substrate and enhances the methane production capacity through anaerobic fermentation with the aid of potassium-enriched biochar. By adding potassium-enriched biochar to pretreated rice straw for anaerobic fermentation, this invention not only stimulates microbial activity and promotes the metabolism of system microorganisms, improving the efficiency of each stage of anaerobic fermentation, but also allows for more effective utilization of the substrate, thereby increasing methane yield.

This invention belongs to the field of coking wastewater treatment technology and discloses an optimized process for a high-load aerobic tank to improve the treatment efficiency of coking wastewater, including the following steps: (1) After pretreatment, the coking wastewater enters the equalization tank. A portion of the sludge mixture in the equalization tank enters the high-load aerobic tank O1 and the primary sedimentation tank in sequence, and another portion of the sludge mixture enters the low-load AO tank and the primary sedimentation tank in sequence; (2) A portion of the activated sludge in the primary sedimentation tank and the primary sedimentation tank is internally recycled and recycled back to the high-load aerobic tank O1, respectively; (3) The activated sludge in the high-load aerobic tank O1 is regulated and a continuous high-load influent operation mode is maintained. The regulation includes aeration rate regulation, nutrient regulation and sludge discharge rate regulation; (4) The effluent from the high-load aerobic tank O1 enters the low-load AO tank, and the substance content of the effluent is controlled so that the C / N ratio of the low-load AO tank is within a certain range. This invention utilizes the sludge recycling and regulation method to ensure that O1 can operate stably under high-load operation.

The utility model relates to filter device field discloses a kind of activated sludge dewatering filter devices, including rack, the upper surface of the rack is fixedly connected with machine base, the rear end of the upper surface of the machine base is fixedly connected with support block, the upper surface of the support block is fixedly connected with machine case, the upper surface of the machine case is provided with agitating mechanism, the agitating mechanism includes the agitating jar of the upper surface of machine case fixed connection, the upper surface of the agitating jar is fixedly connected with shell.In the utility model, the stirring jar in the stirring jar, the auger blade and the stirring plate can stir the sludge, which can effectively prevent the sludge from accumulating and entering the dehydration program, and the stirring plate is responsible for continuously pushing the sludge at the bottom to the through hole, the auger blade transports the sludge downward, and the stirring plate is responsible for stirring the sludge, which can effectively prevent the sludge from accumulating and caking, and can effectively improve the working efficiency of the device.

This invention discloses an integrated biological trickling filtration ammonia removal method and apparatus, comprising the following steps: S1: Inoculating the biological trickling filter layer with aerobic activated sludge and the ammonia nitrogen conversion layer with anaerobic ammonia oxidation granular sludge, and cultivating them using a circulating biofilm method; S2: Introducing ammonia-containing waste gas, periodically replacing the circulating liquid and adding nutrients; S3: Stopping the replacement of the circulating liquid and instead periodically replenishing with fresh nutrient solution; S4: Reducing the inlet ammonia concentration, completing the acclimatization; S5: Stable operation of synergistic denitrification: closing the leachate discharge hole, allowing the leachate flowing out of the biological trickling filter layer to flow by gravity into the ammonia nitrogen conversion layer, controlling the hydraulic retention time and effluent recirculation ratio of the ammonia nitrogen conversion layer to achieve integrated synergistic denitrification. This application achieves deep denitrification, completely solving secondary pollution. Through the built-in anaerobic ammonia oxidation unit, the total nitrogen removal rate reaches over 90%, avoiding secondary pollution of nitrogen-containing wastewater.

The installation structure of the MBR membrane module assembly comprises a treatment container, a membrane module arranged in the treatment container, and a suspension mechanism, the treatment container is provided with a hoisting frame above the membrane module, the hoisting frame is driven by a reciprocating vibrator to reciprocate in the horizontal direction, the suspension mechanism comprises four hoisting arms, the upper ends of the hoisting arms are respectively hinged to the four corners of the hoisting frame and rotate along the reciprocating direction of the hoisting frame, and the lower ends of the hoisting arms are respectively hinged to the top frame of the membrane module and rotate along the reciprocating direction of the hoisting frame, and the combination constitutes the installation structure of the MBR membrane module assembly. The MBR membrane module assembly is simple in structure, low in transformation cost, is subjected to scouring with water body through rapid reciprocating motion, achieves the purpose of removing activated sludge adsorbed on the surface of the membrane module, and effectively reduces energy consumption.

This invention provides a high-efficiency activated sludge conditioning device adaptable to multiple scenarios, including a conditioning tank. A guide cylinder is mounted inside the conditioning tank via a support, forming a reaction zone between the conditioning tank and the guide cylinder. A sludge inlet pipe, connected to an external sludge inlet pipeline, is connected to the lower part of the guide cylinder. Three sets of dosing devices are spaced apart from top to bottom on the inner wall of the guide cylinder. A stirring shaft is suspended in the middle of the guide cylinder, with stirring blades mounted on it. The stirring shaft is driven by a motor. Each dosing device is connected to a chemical storage device via a switching valve mounted on a pipeline, and another via a first aeration valve to an aeration system. A sludge outlet is located at the bottom of the conditioning tank, connected to a sludge outlet pipeline via a sludge outlet valve and a sludge outlet pump mounted on a pipeline. The invention also provides a method for sludge conditioning using the above device. This solves the problems of uneven mixing and chemical waste in traditional sludge conditioning devices, significantly improving sludge dewatering performance and reducing flocculant usage.

This invention discloses an apparatus and method for achieving deep nitrogen removal and phosphorus recovery through dual short-range coupled anammox fermentation using in-situ sludge fermentation. First, calcium chloride solution is added to the anammox reactor at the rear end of a two-stage PNA process to form recoverable phosphorus crystals such as Ca-P precipitates. Anaerobic ammonia oxidizing bacteria attach to the surface of the precipitates, thereby enriching and retaining them within the anammox reactor. During the continuous formation of anaerobic ammonia oxidizing particles, unfermented waste activated sludge is added to the PNA process. The slow hydrolysis and acidification of the waste activated sludge provide a carbon source for the short-range denitrifying bacteria, completing the transformation from single-stage PNA autotrophic nitrogen removal to dual short-range coupled anammox synergistic nitrogen removal. In this invention, the anaerobic ammonia oxidizing bacteria in the granular sludge after operation can reach 12%, 73% of the sludge exhibits a particle size greater than 200 μm, and the total nitrogen removal rate remains above 90%, with most phosphorus existing in the recoverable form of Ca-P crystals.

This utility model discloses a high-concentration manure-straw methanogenic device with a uniformly porous baffle, comprising a fermentation tank with an external heat-insulating structure and a porous baffle disposed within the fermentation tank. The porous baffle has multiple uniformly distributed through holes, dividing the fermentation tank into an upper cavity and a lower cavity. The upper cavity is configured as a hydrolysis-acidification reaction zone, and the lower cavity is configured as an anaerobic methanogenic reaction zone. Its structure is reliable and its performance is good. The use of a uniformly porous baffle within the tank allows for the spatial separation of the anaerobic fermentation for methanogenic production into two phases. Simultaneously, the uniformly porous baffle promotes the longitudinal diffusion of reactants and gas, preventing excessive accumulation of volatile fatty acid concentration in the upper part and avoiding the floating and sludge formation of fermentation materials in the lower part. Furthermore, the porous structure of the baffle can trap activated sludge, extending the SRT (short-term residual temperature) and increasing microbial biomass, while allowing rapid liquid flow and maintaining a short HRT (high-temperature residual temperature).

The application relates to the technical field of sewage treatment, in particular to a filtering and purifying method, device and system for comprehensive wastewater. The method comprises the following steps: obtaining pretreated wastewater through a pretreatment operation; obtaining first-stage treated wastewater through flocculant precipitation; obtaining second-stage treated wastewater through an activated sludge method and sludge-water separation; in the activated sludge method treatment, an aeration tank is divided into regions, temperature, salinity and dissolved oxygen are collected, an influence weight is determined based on the correlation of temperature, salinity and dissolved oxygen, a comprehensive influence weight is determined based on time difference, the influence weight and fluctuation, and the activated sludge method is completed based on the aeration threshold adjustment; and the second-stage treated wastewater is filtered after being placed in a buffer tank to complete the purification of the wastewater. The application improves the wastewater treatment precision.