103 results about "Anaerobic microorganisms" patented technology

The invention discloses a sewage zero discharge treatment device which comprises a sewage treatment tank, a first partition plate, a second partition plate, a third partition plate and a fourth partition plate are arranged in the sewage treatment tank, a closed area between the third partition plate and the fourth partition plate forms a collection pool, and a rotating magnetic field device is arranged on the periphery of an anaerobic pool. The rotating magnetic field device generates a rotating magnetic field, ferroferric oxide nanoparticles with the surfaces modified with sulfonic acid groups exist in the anaerobic tank, the ferroferric oxide nanoparticles have superparamagnetism and are driven by the rotating magnetic field to form a directional vortex flow, and the ferroferric oxide nanoparticles adsorb protons and load anaerobic microorganisms. A magnetic biological membrane is formed, meanwhile, the mixed mass transfer efficiency of microorganisms and sewage is enhanced through the directional vortex flow, an ultrasonic vibrator array is arranged at the bottom of the aerobic tank, and a collecting device is arranged above the sewage treatment tank.

The resource utilization type sewage treatment equipment comprises a box body internally provided with a containing cavity, the box body is provided with a water inlet and a water outlet, three partition plates are arranged in the containing cavity at intervals, and the containing cavity is divided into a primary sedimentation tank, an anaerobic fermentation tank, a sludge fermentation tank and a reuse water storage tank which are sequentially communicated. According to the utility model, the accommodating cavity is divided into the primary sedimentation tank, the anaerobic fermentation tank, the sludge fermentation tank and the recycled water storage tank which are sequentially communicated through the three partition plates, large-particle impurities in sewage are subjected to hydrolytic acidification and sedimentation in the unit through the primary sedimentation tank, and then microorganism-attachable suspended filler is added through the anaerobic fermentation tank; the acidified and hydrolyzed sewage is deeply fermented and decomposed by anaerobic microorganisms in the area and is further purified. And the sludge fermentation tank is divided into an anaerobic sludge fermentation zone, a three-dimensional filter material microbial reaction zone, a microporous ceramsite adsorption zone and gravel filtration plant absorption from bottom to top, so that the ultimate purification of water quality is achieved.

The utility model discloses an agricultural sludge anaerobic digestion treatment device, and relates to the technical field of sludge anaerobic digestion treatment devices. The agricultural sludge anaerobic digestion treatment device comprises a bottom plate, a control box and an anaerobic digestion reactor, a crushing mechanism is arranged at the top of the bottom plate, an extrusion mechanism is arranged on the surface of the crushing mechanism, and extraction assemblies are arranged on the top of the bottom plate, the surface of the crushing mechanism and the surface of the anaerobic digestion reactor. According to the anaerobic digestion reactor, massive sludge is crushed through the extrusion mechanism, the sludge is crushed into smaller particles through the crushing mechanism, the decomposition effect of anaerobic microorganisms is facilitated, and the sludge crushed in the crushing mechanism is extracted into the anaerobic digestion reactor through the extraction assembly; and organic matters are easier to degrade by microorganisms after the sludge is crushed, so that more biogas can be generated, the particle size can be reduced by crushing the sludge, the blocking risk is reduced, and the stable operation of the system is ensured.

The utility model provides a cleaning device for suspended matters in anaerobic fermentation treatment, which comprises a shell, an interlayer arranged on the shell, a slag bearing device arranged at the bottom of the interlayer, a rotary cleaning device arranged on the slag bearing device, a slag collecting box arranged at the bottom of the slag bearing device, tracks arranged on two sides of the slag collecting box, each track comprises a sliding block and a sliding rail, and the sliding blocks are mounted on the slag collecting box. And due to the application of the slag bearing device, the cleaning device and the slag collecting box, impurities in the shell can be timely and repeatedly discharged, and the phenomena that pipelines and equipment are blocked and the operation of the device is influenced due to the fact that the impurities of suspended solids and grease substances are not cleaned for a long time are avoided. Meanwhile, the phenomena of impurity crusting, negative influence on the quality of biogas slurry, influence on the activity of anaerobic microorganisms and reduction of the fermentation efficiency are avoided, the gas production efficiency is improved, and the method has a relatively high popularization value.

The present application relates to a kind of high alkalinity wastewater pre-acidification treatment method and its processing device system, the treatment method includes: the nutrient substance is added to the wastewater to be treated and is adjusted to obtain adjusted water;Part of the adjusted water is returned to adjust and handle, another part is added to the nutrient substance and is pre-acidification treatment, obtain pre-acidification water;Pre-acidification water is treated by anaerobic purification, obtain anaerobic purification water;Anaerobic purification water is treated by aeration and sedimentation in turn, obtain treated water.The treatment method and its processing device system provided by the present application can regulate the metabolic activity of microorganism, reduce the inhibitory effect of wastewater alkalinity and metal ions on anaerobic microorganism, improve the anaerobic removal rate of anaerobic purification treatment, reduce the adding cost of acidic substance and nutrient substance.

The present application relates to the organic wastewater and greenhouse gas carbon dioxide resource utilization, biological energy and biological electrochemical engineering cross technical field, disclose a kind of system and method for preparing middle chain fatty acid and sustainable aviation fuel in cooperation, system with organic wastewater as carbon source and electron donor, short-chain organic acid is converted into middle chain fatty acid by anaerobic microorganism carbon chain extension reaction, and is separated in situ by liquid membrane extraction and enriched;Enriched product is introduced into microbial electrosynthesis reactor, and further carbon chain extension is carried out by anode Kolbe electrolysis catalysis, and C10-C14 sustainable aviation fuel is prepared;Carbon dioxide is used as carbon source in cathode, and is converted into acetic acid by microbial catalysis, and carbon chain extension is carried out again by co-fermentation with organic wastewater.The present application realizes the synergic integration of organic wastewater treatment, carbon dioxide resource utilization and high value-added fuel preparation, and has high resource utilization degree, high carbon utilization efficiency and significant environmental benefits.

An anaerobic digestion process monitoring system can accurately predict the amount of biogas produced even when the activity of anaerobic microorganisms in a digester fluctuates. The system comprises: a first sensor (4) for measuring the amount of organic waste fed into a digester (2) and outputting load data as a measurement result; a second sensor (5) for measuring the properties of a fermentation liquid inside the digester (2) and outputting fermentation liquid property data as a measurement result; a preprocessing unit (12) for calculating estimated activity index data indicating the activity of anaerobic microorganisms based on the load data and the fermentation liquid property data using a first estimation model; and a gas production prediction unit (13) for calculating a predicted value of biogas production based on the load data, the fermentation liquid property data, and the estimated activity index data using a second estimation model.

The invention discloses a rice blast-resistant rice crossbreeding device and method, and relates to the technical field of rice crossbreeding, the rice blast-resistant rice crossbreeding device comprises a cylinder, a fixing ring is fixedly connected in the cylinder, a plurality of supporting rings are arranged in the fixing ring, and a through groove is formed in the inner wall of the top of each supporting ring; the outer sides of the supporting rings are fixedly connected with middle plates, the two ends of each middle plate are fixedly connected with the two adjacent supporting rings correspondingly, and supporting assemblies are arranged in the supporting rings. According to the rice blast-resistant rice crossbreeding device and method, air in the conical barrel can be continuously exchanged with the outside through holes among the supporting rings, sufficient oxygen is provided for seed germination and root growth, breeding of anaerobic microorganisms is effectively inhibited, the risk of seed rotting and root rotting is reduced, and meanwhile, the yield of the rice blast-resistant rice is increased. A stable distance is formed between the bottom of the conical barrel and the water liquid level through the supporting structure of the upper and lower double circular plates, and seeds can be concentrated in the conical barrel and stably make contact with water.

The invention discloses an integrated anaerobic digestion membrane bioreactor, which effectively achieves the purpose of conveniently backwashing a filter membrane, and comprises an anaerobic digestion reactor for storing anaerobic microorganisms, the feed end of the anaerobic digestion reactor is connected with a batching tank, and the feed end of the batching tank is connected with an anaerobic digestion reactor. The discharging end of the anaerobic digestion reactor is connected with a filtering mechanism used for solid-liquid separation, the filtering mechanism sequentially comprises a feeding part, a filtering part and a discharging part which are communicated with one another from bottom to top, the interior of the filtering part is detachably connected with a filtering box, and the interior of the filtering box is detachably connected with a plurality of filtering assemblies. The device is ingenious in conception and simple and convenient to operate, effectively facilitates disassembly, assembly and maintenance of workers, facilitates thorough cleaning of the interior of the filter box by the workers, facilitates pipeline connection of different reaction procedures, can automatically clean a filter membrane, facilitates disassembly and assembly of the whole device, and improves the working efficiency. And the back-washed reactants can be conveniently discharged.

The invention discloses a sludge circulating membrane biological sewage treatment device and method. Comprising a cylindrical shell, and four annular galleries are coaxially arranged in the cylindrical shell; a treatment tank is arranged in the middle of the fourth annular gallery in the center; an anaerobic zone and an anoxic zone are arranged in the first annular gallery positioned on the outer side; the first aerobic zone is positioned in the second annular gallery; the second aerobic zone is positioned in the third annular gallery; the third aerobic zone is positioned in the fourth annular gallery; the MBR pre-anoxic zone is arranged in the treatment tank; the first annular gallery and the second annular gallery at the tail end of the anoxic zone are communicated through a through-wall pipe; the second annular gallery, the third annular gallery and the fourth annular gallery are communicated through wall penetrating pipes. The MBR pre-anoxic zone is arranged to replace a traditional secondary sedimentation tank, dissolved oxygen and nitrate nitrogen in returned sludge are partially consumed in the MBR pre-anoxic zone, the influence on anaerobic microorganisms in the anaerobic zone is reduced, and meanwhile, the occupied area of sewage treatment equipment can be saved.

The utility model relates to the technical field of edible mushroom processing, and discloses a sterilizing device for edible mushrooms, which comprises a bearing mechanism and a sterilizing mechanism, the sterilizing mechanism is fixedly connected inside the bearing mechanism, the sterilizing mechanism comprises a sterilizing unit and a limiting unit, the sterilizing unit is fixedly connected inside the bearing mechanism, and the limiting unit is fixedly connected inside the bearing mechanism. And the limiting unit is arranged in the degerming unit. According to the sterilization device for the edible mushrooms, through a vibration machine and a vibration head in the limiting unit, edible mushroom materials in the bearing disc vibrate in the sterilization process, the stacking and shielding state of the materials at the top and the bottom in a traditional container is broken, and irradiation of an ultraviolet sterilization lamp can be more uniform; air in the inner shell can be exhausted through the air exhauster in the sterilization unit, a low-oxygen environment is formed, on one hand, anaerobic microorganism breeding is inhibited, on the other hand, interference of air on ultraviolet diffusion is reduced, and the ultraviolet rays cover the surface of the material more evenly.

The application discloses an oil agent equipment cleaning waste liquid treatment device and method, and relates to the field of oil agent waste liquid treatment. The device comprises an electric field demulsification mechanism in communication with a waste liquid pipe, wherein a pulse electrode is arranged in the electric field demulsification mechanism, a composite reactor is arranged on the downstream side of the electric field demulsification mechanism, an anaerobic bacteria area, a lower grid, a transverse partition plate, an upper grid and an aerobic bacteria area are arranged from bottom to top in the electric field demulsification mechanism, and the electric field demulsification mechanism is further provided with an aeration assembly, a monitoring and shunting system and a gas collecting mechanism. The treatment method comprises the following steps: electric field demulsification pretreatment, aeration, aerobic / anaerobic microbial degradation, multi-parameter monitoring and shunting treatment. According to the application, secondary pollution is avoided through pulse electric field demulsification, pollutants are degraded in stages by using an anaerobic-aerobic linkage circulation structure, real-time monitoring and intelligent shunting are combined, and the treatment efficiency is improved and the operation cost is reduced.

The utility model discloses an efficient and energy-saving slaughter wastewater treatment system, and belongs to the technical field of sewage treatment. The efficient and energy-saving slaughter wastewater treatment system comprises a water collecting tank, an anaerobic tank, an adjusting tank and a secondary sedimentation tank which are communicated in sequence, a sludge return pipeline communicated with the anaerobic tank is arranged on the regulating tank, and a first aerobic tank and a second aerobic tank which are connected in parallel are arranged between the regulating tank and the secondary sedimentation tank through a pipeline. According to the utility model, the anaerobic tank is adjusted to the front end of the adjusting tank, so that effluent of the water collecting tank firstly enters the anaerobic tank, granular COD (Chemical Oxygen Demand) can be well prevented from being deposited at the bottom of the adjusting tank, a carbon source can be utilized to the greatest extent, the total tank volume is effectively reduced, and the water tank volume and the construction cost are reduced; anaerobic microorganisms in the regulating tank are accumulated and flow back to the anaerobic tank, so that the anaerobic treatment efficiency is greatly improved. According to the utility model, the denitrification efficiency can be effectively improved, the addition of an external carbon source is reduced by reasonably utilizing the own carbon source in the sewage, and the purposes of reducing cost and saving energy are achieved.

Agents, kits, and methods that utilize oxygenation to treat Inflammatory Bowel Disease (IBD) and / or provide prophylaxis against exacerbation of IBD are provided. In several embodiments, the agents, kits, and methods according to several embodiments generate in, or carry to, oxygen in the intestinal lumen to treat IBD and provide prophylaxis against exacerbation of IBD, including those caused by the presence of anaerobic bacteria in the intestine. The agents, kits, and methods provided herein generate an aerobic environment within the intestine to alleviate intestinal inflammation.

The present application relates to sewage treatment technical field, specifically to a kind of acrylonitrile sewage treatment device, comprising: microbial purification tank, exhaust mechanism, the exhaust mechanism has two and symmetrically set in the two sides of the inner wall of microbial purification tank width direction, the exhaust mechanism includes the cavity plate fixedly connected in the inner wall of microbial purification tank. By cavity plate, partition block and air separation assembly in exhaust mechanism, air can be injected and extracted into microbial purification tank, so as to provide corresponding purification environment for aerobic microorganism or anaerobic microorganism to purify sewage, and then realize that when injecting air, air exposure area and immersion area can inject air into microbial purification tank simultaneously to provide sufficient oxygen for aerobic microorganism to purify sewage, help its efficient decomposition of pollutants in sewage, while when extracting air, air separation assembly disconnects the communication of air exposure area and immersion area, so that suction airflow is only discharged from air exposure area, avoid sewage from flowing out with cavity plate, while avoiding suction airflow from immersion area to interfere with anaerobic environment in tank.

The application relates to a wastewater treatment device and a wastewater treatment equipment, which comprise a plurality of wastewater treatment components arranged in an anaerobic reaction tank according to a preset arrangement mode, wherein the wastewater treatment component comprises an inner electrode layer in a ring column structure, an isolation medium layer and an outer electrode layer which are sequentially arranged outside the periphery of the inner electrode layer; the outer electrode layer is used for stimulating anaerobic microorganisms in the anaerobic reaction tank to degrade and treat the to-be-degraded substances in the wastewater in the anaerobic reaction tank under the condition of being connected with the positive pole of a power supply, so as to release the electrons and protons in the to-be-degraded substances; the inner electrode layer is surrounded by a cavity, and the inner electrode layer is used for being connected with the negative pole of the power supply, so that the electrons, the protons and the dissolved oxygen of the wastewater entering the cavity can carry out a reduction reaction in the cavity. The wastewater treatment device and the wastewater treatment equipment provided by the application have higher wastewater treatment efficiency.

The utility model relates to a deoxygenization device for an anaerobic microorganism reactor. The deoxygenization device comprises an argon bottle, a reactor, a test tube, a vacuum pump, a pressure meter, a first glass tube, a second glass tube and a three-way scavenging valve, one end of the first glass tube is connected with the argon bottle, the other end of the first glass tube is connected with the test tube, a first opening is formed in the middle section of the first glass tube, and the first opening is connected with the three-way scavenging valve; one end of the second glass tube is connected with the three-way scavenging air valve, the other end of the second glass tube is connected with the vacuum pump, a second opening is formed in one end, connected with the vacuum pump, of the second glass tube, and the second opening is connected with the pressure gauge; and the three-way scavenging air valve is also connected with the reactor. According to the anaerobic microorganism reactor, reaction liquid in the reactor does not need to be preheated, and oxygen is removed under the condition that the activity of microorganisms is not influenced, so that the anaerobic microorganism reactor can normally react.

The invention discloses a method for independently recovering phosphate and nano zero-valent iron through anaerobic fermentation of excess sludge. The method comprises the following steps: adding the excess sludge into an anaerobic reactor, electrifying a cathode plate and an anode plate in the anaerobic reactor, keeping for a period of time, carrying out anaerobic fermentation on anaerobic microorganisms in the excess sludge, enabling phosphorus elements in the excess sludge to enter supernate, reducing the iron element in the residual sludge on the cathode plate to generate nanoscale zero-valent iron, and separating the supernate from the cathode plate after electrifying is finished; the electrifying condition is as follows: the control voltage is 1.5-5.0 V. According to the method disclosed by the invention, the release of phosphate in the supernate and the electrochemical reduction of Fe on a cathode plate can be realized to generate the nano zero-valent iron. Meanwhile, the anaerobic fermentation process is not affected in the electrifying stage, and the ratio of acetic acid in volatile acid is increased.

The present invention discloses a device and method for promoting the production of medium-chain fatty acids by anaerobic microorganisms. The device includes a device body, a sludge treatment chamber, an anaerobic microorganism chamber, a medium-chain fatty acid production chamber, and auxiliary components. The device body includes a housing, a rotating shaft is rotatably connected in the housing, a hollow groove is provided in the rotating shaft, an upper cover is installed on the housing, and a feed port is installed on the upper cover; the sludge treatment chamber includes a first sieve plate and a second sieve plate. The device provided by the present invention is an integrated device, in which all processes from sludge to medium-chain fatty acids can be completed, thereby simplifying the equipment for preparing medium-chain fatty acids, making the equipment occupy a smaller area, and reducing the procurement cost and use cost of the equipment, thereby reducing the cost of preparing medium-chain fatty acids. It has significant significance in the treatment of sludge, realizes resource recycling, effectively curbs the pollution of sludge to the environment, and has great promotion value.

The utility model provides a thermal insulation structure of an anaerobic tank, the anaerobic tank sequentially comprises an outer wall, a thermal insulation layer, a heat supply layer and a heat conduction inner layer from outside to inside, the outer wall is a concrete wall body, the innermost layer of the thermal insulation layer is a polyethylene thermal insulation layer, and bubbles are uniformly arranged on the inner side of the polyethylene thermal insulation layer at intervals; the heat supply layer comprises multiple layers of side heating pipes and pool bottom heating pipes which are arranged at equal intervals, the side heating pipes surround the inner side of the heat preservation layer, and water inlet pipes and water outlet pipes of the side heating pipes penetrate through the outer wall to be connected with a heat supply device; the pool bottom heating pipe is a heating coil, a water inlet section and a water outlet section at the end of the pool bottom heating pipe also penetrate through the outer wall to be connected with the heat supply device, and the heat conduction inner layer makes contact with the side heating pipe and the pool bottom heating pipe. Through the multi-layer structural design, heat loss is effectively reduced, and the heat preservation performance is further improved through the polyethylene heat preservation layer and bubbles on the inner side of the polyethylene heat preservation layer; the layout of the side heating pipes and the tank bottom heating pipe ensures the uniformity of the temperature in the anaerobic tank, and is beneficial to maintaining the activity of anaerobic microorganisms.

The invention relates to the technical field of sewage treatment, in particular to an acrylonitrile sewage treatment device which comprises a microorganism purification box and two discharge and suction mechanisms, the discharge and suction mechanisms are symmetrically arranged on the inner walls of the two sides of the microorganism purification box in the width direction, and each discharge and suction mechanism comprises a cavity plate fixedly connected to the inner wall of the microorganism purification box. Through a hollow cavity plate, a separation block and an air separation assembly in the discharge and suction mechanism, air can be injected into and sucked into the microorganism purification box, so that a corresponding purification environment is provided for sewage purification by aerobic microorganisms or anaerobic microorganisms, and the sewage purification efficiency is improved when the air is injected. The exposed area and the water soaking area can inject air into the microorganism purification box at the same time to provide sufficient oxygen for aerobic microorganism purification sewage and assist the aerobic microorganism purification box to efficiently decompose pollutants in the sewage, and when air is sucked, the air separation assembly separates the exposed area from the water soaking area, so that suction airflow is only discharged from the exposed area, the sewage is prevented from flowing out along with the cavity plate, and the service life of the sewage is prolonged. Meanwhile, suction airflow discharged by the soaking area is prevented from interfering the anaerobic environment in the box.

An object of the present invention is to provide an organic waste treatment apparatus, an operation method thereof, and an organic waste treatment method capable of preventing an increase in the number of anaerobic digestion tanks and an adverse effect on a water treatment facility and recovering a large amount of resources including biogas from a sewage treatment plant even in a higher organic matter load (input of a large amount of dehydrated cake) than before by increasing the efficiency of an anaerobic digestion process.SOLUTION: The organic waste treatment apparatus of the present invention comprises an anaerobic digestion tank for producing digested sludge by methane fermentation of slurry-like organic waste with anaerobic microorganisms, a solid-liquid separation device for separating the digested sludge in the anaerobic digestion tank into concentrated sludge and separated liquid, and an electrodialysis device for separating desalted liquid by electrodialysis of the separated liquid with an ion exchange membrane, wherein the separated liquid is introduced into the anaerobic digestion tank.SELECTED DRAWING: Figure 1

The invention discloses a wastewater treatment device for synthesis of 5-methyltetrahydrofolic acid, and relates to the technical field of wastewater treatment.The wastewater treatment device comprises a rotating aeration mechanism and a first rotating ring installed on the outer side of the rotating aeration mechanism, a purification mechanism is arranged on the outer side of the rotating aeration mechanism, and a connecting bent pipe is arranged at the bottom of the purification mechanism; the rotating aeration mechanism comprises two rotating sleeves, rotating brackets are symmetrically mounted on the outer side of the rotating sleeve on one side, a rotating connecting shaft is rotatably connected to the top of each rotating bracket, a rotating knob is fixedly mounted at the top of each rotating connecting shaft, and a rotating shaft is fixedly mounted at the top of each rotating knob. A rotating worm is fixedly mounted at the bottom of the rotating connecting shaft, an anaerobic degradation environment for anaerobic microorganisms can be provided in a rotating manner, and an aerobic degradation environment for aerobic microorganisms can also be provided, so that the sewage purification effect of the microorganisms is improved.

The utility model relates to a wastewater treatment system, which comprises: a homogeneous hydrolysis tank, the homogeneous hydrolysis tank is communicated with a first output pipeline and a second output pipeline, the first output pipeline is provided with a first valve, and the second output pipeline is provided with a second valve; the anaerobic tank is communicated with the first output pipeline; the first-stage A / O tank is communicated with the first output pipeline, the first-stage A / O tank is communicated with the second output pipeline, a third output pipeline is communicated between the first-stage A / O tank and the anaerobic tank, and a third valve is mounted on the third output pipeline. The wastewater treatment system ingeniously divides wastewater into two parts for treatment. Half of the wastewater enters the anaerobic tank, and the chemical oxygen demand (COD) in the wastewater is effectively removed by utilizing the degradation effect of anaerobic microorganisms. And the other half of wastewater directly enters the first-stage A / O tank in an overrunning manner, so that the split-flow treatment of the wastewater is realized, and the overall treatment efficiency is improved. A third valve is arranged, so that the wastewater directly entering the first-stage A / O tank in an overrunning manner is supplemented as a carbon source.

The invention relates to a synchronous nitrogen and phosphorus removal process method of a nitrate-mediated anaerobic microorganism-sponge iron system and a construction method. Sponge iron and dispersed filler are filled in an anaerobic reactor, and mixed sludge containing corrosive functional microorganisms and autotrophic denitrification microorganisms is inoculated; and continuously pumping biochemical tail water containing nitrate and phosphate with specific concentration for a period of time to form a nitrate-anaerobic microorganism-sponge iron ternary synergistic reaction system. Nitrate is introduced to promote sponge iron to continuously dissolve out Fe < 2 + >, phosphorus removal is achieved through a biological mineralization effect with soluble phosphate in biochemical tail water, corrosive functional microorganisms effectively relieve surface passivation of the sponge iron, and autotrophic denitrification microorganisms drive a multi-element denitrification mechanism; according to the process method, synchronous nitrogen and phosphorus removal of the low-carbon-nitrogen-ratio biochemical tail water can be realized under the condition that an additional carbon source is not needed, synchronous nitrogen and phosphorus removal can be realized efficiently and stably, the carbon source consumption and the energy consumption are remarkably reduced, and no chemical sludge is generated.

This invention relates to the field of sludge treatment technology and discloses a method for dealkalizing red mud using microorganisms, comprising the following steps: (1) adding anaerobic granular sludge and nutrient solution to a reaction vessel containing red mud slurry; (2) continuing to add nutrient solution to the reaction vessel, mixing and stirring, and allowing it to stand and separate into layers to obtain a supernatant, and measuring the pH value of the supernatant; wherein, the solute of the nutrient solution is a carbon source, and the solvent is effluent from the anaerobic reactor; (3) taking the supernatant and returning the taken-out supernatant to the anaerobic reactor; (4) repeating steps (2)-(3) until the pH value of the supernatant is stable. This invention utilizes the organic acids released during the degradation of organic matter by anaerobic microorganisms of a complex bacterial community to neutralize the alkali in red mud, reduce the pH of the red mud, simplify the microbial dealkalization process of red mud, and the red mud dealkalized by this method has a near-neutral pH and remains stable.

The utility model relates to an integrated nitrification and denitrification microbial purifier for aquaculture water, which is characterized in that an oxygen supply device, an internal circulation infusion device and a sediment drainage device are controlled by a control device according to time, the working time period of a biological filler bin is divided into a nitrification time period and a denitrification time period, and a nitrification reaction and a denitrification reaction are switched; in the nitrification period, the biological filler bin is in an aerobic environment, the activity of anaerobic microorganisms is inhibited, and the aerobic microorganisms can perform normal nitrification reaction; in the denitrification period, the oxygen supply device is closed, the sediment drainage device draws sediment mixed liquid on the bottom layer of the biological filler bin to the middle of the biological filler bin and releases the sediment mixed liquid, the biological filler bin is in an anaerobic environment, the activity of aerobic microorganisms is inhibited, the anaerobic microorganisms can be subjected to cultivation and denitrification degradation reaction in an anoxic state, and the anaerobic microorganisms can be subjected to denitrification degradation reaction. And the sediment mixed liquid can be used for necessary carbon source supplementation for the denitrification reaction.

The application discloses an anaerobic microbial degradation polypropylene non-woven fabric and a preparation method thereof. The non-woven fabric is prepared from raw materials containing the following components: polypropylene resin, modified chitosan, activated carbon, nano-Fe3O4, modified nano-SiO2, hyperbranched polysiloxane and maleic anhydride grafted polypropylene. The modified chitosan, activated carbon, nano-Fe3O4 and modified nano-SiO2 are in-situ compounded by the hyperbranched polysiloxane to form an anaerobic degradation functional composite filler. The modified chitosan, activated carbon, nano-Fe3O4 and modified nano-SiO2 are pre-compounded by the hyperbranched polysiloxane to form the anaerobic degradation functional composite filler. The anaerobic degradation functional composite filler can be uniformly dispersed in the polypropylene resin, so that the non-woven fabric has good processability, and the prepared non-woven fabric has stable performance in the use stage and can be quickly and efficiently degraded in an anaerobic environment after being discarded.

The invention belongs to the technical field of sludge treatment, and provides a method and a system for strengthening sludge cracking and producing medium-chain fatty acid. The method comprises the following steps: concentrating sludge, mixing the concentrated sludge with halogenated hydantoin, and cracking to obtain cracked sludge; and carrying out two-stage fermentation treatment on the cracked sludge to obtain the medium-chain fatty acid. According to the method, halogenated hydantoin is adopted as a pretreatment agent for cracking the sludge, and through spontaneous combination of halogenated hydantoin molecules and the sludge extracellular polymeric substances, tight combination type extracellular polymeric substances and cell walls are remarkably oxidized and damaged; meanwhile, hypochlorous acid is slowly released to maintain a proper oxidative stress effect to stimulate the biological metabolism effect of anaerobic microorganisms, hydrolysis and acidification of organic matters are promoted, and a large number of electron acceptors are provided for microorganisms participating in carbon chain extension to produce MCFA subsequently. The method is simple, low in cost, small in medicament demand and beneficial to promoting efficient resource utilization of the sludge.

The utility model relates to the technical field of sewage treatment, and discloses an AO biochemical treatment tank for treating sewage, which comprises a treatment tank body, a water distribution aeration part and a stirring inner wall cleaning part, and an anaerobic tank and an aerobic tank are respectively arranged in the treatment tank body. According to the utility model, the water distribution pipe is communicated with the communicating block and the water inlet connecting pipe, so that sewage can be uniformly distributed to each area of the anaerobic tank, and organic matters in the sewage can be in full contact with anaerobic microorganisms, so that an anaerobic reaction can be effectively carried out in the whole anaerobic tank; the situation that the treatment effect is poor due to the fact that the concentration of sewage in a local area is too high or too low is avoided, an air blower is connected with an aeration ring pipe through a connecting bent pipe and a connecting pipe, air is conveyed into an aerobic tank, aeration heads on the aeration ring pipe can evenly release the air into the sewage in the form of tiny bubbles, oxygen is provided for aerobic microorganisms, and the treatment effect is improved. The oxygenolysis of aerobic microorganisms on organic matters in the sewage is promoted.