46results about How to "Reduce odor concentration" patented technology

The invention discloses a compound microorganism preparation. The compound microorganism preparation comprises thermophilic fat bacillus, pseudomonas aeruginosa, streptococcus thermophilus, bacillus megatherium and bacillus flexus. The invention further discloses a preparing method of the compound microorganism preparation and application of the compound microorganism preparation to processing animal carcasses. Compared with the prior art, the compound microorganism preparation has the beneficial effects that macromolecular compounds, such as fat and celluloses in the animal carcasses and straw auxiliary materials, which are difficult to decompose can be efficiently and rapidly decomposed through the compound microorganism preparation, and the animal carcasses are converted into organic fertilizers with the low fat content; and the compound microorganism preparation further has the efficient deodorization function, the release amount of NH3 and H2S in the processing procedure can be effectively reduced, the stink concentration is reduced, and odorless processing is achieved. Finally, the animal carcasses are efficiently and safely processed into the organic fertilizers in an environmental protection manner, and resource utilization of the animal carcasses is achieved.

The invention relates to a compound biological deodorizer as well as a preparation method and application thereof. The compound biological deodorizer comprises a plant extract, pichia pastoris, pediococcus pentosaceus, pediococcus acidilactici, candida mycoderma and bacillus megatherium. Through the utilization of compound biological deodorizer to treat a waste transfer station, a livestock and poultry farm and a composting site, the NH3 removal rate can respectively reach 65.2-71.6%, 63.4-73.7% and 53.42-75.77%, and the H2S removal rate can reach 53.5-60.1%, 35.5-45.9% and 47.2-53.8%, so that the odor concentration is obviously reduced, the environment of the periphery of the waste transfer station, the livestock and poultry farm and the composting site is effectively improved, and the improvement of both economic benefits and environment-friendly benefits is facilitated.

The invention discloses a direct feeding type biological fermentation feed additive and a preparation method and an application thereof. The feed additive provided by the invention is composed of ingredients, fermentation probiotics, enzymic preparations and saline solution medium. The product can be directly applied to livestock breeding and aquaculture, and has the effects of improving immunity of animals, enhancing premonition, improving food consumption and a feed conversion ratio, treating and preventing enteric diseases of animals, adjusting balance of intestinal microecology of animals and resisting stress. According to the method provided by the invention, the production strains are screened in a combined manner, a purification method is completed, production time of the strains is subjected to strict quality control, and the problem that biological fermentation is instable is solved. The feed additive is directly used after fermentation, the condition that no damage is caused to all bioactivators generated after fermentation is ensured, and meanwhile the problems about transportation and bacterial contamination in storage are also avoided, so that the effect and security of the product are improved, the cultivation cost is greatly reduced, and the feed additive has a positive promotion effect to green cultivation.

The invention provides a modular sludge thermal hydrolysis treatment method and device. The sludge thermal hydrolysis treatment device comprises a thermal hydrolysis reaction kettle, a cooling jackettank and a measuring bin, and the measuring bin, the thermal hydrolysis reaction kettle and the cooling jacket tank communicate sequentially. The modular sludge thermal hydrolysis treatment device andmethod have the beneficial effects that: 1, sludge is subjected to a thermal hydrolysis reaction, so that the biodegradability of the sludge is greatly improved, the dehydration property of the sludge is greatly improved, poisonous and harmful pathogenic bacteria and toxic substances in the sludge are killed, and the reduction, harmlessness and recycle of the sludge are realized; 2, no alkaline agents are added in the process, so that the temperature and pressure of sludge thermal hydrolysis treatment are greatly reduced, the equipment grade, energy consumption and cost are reduced, and the treatment efficiency is increased; 3, the biochemical indexes of thermal hydrolysis slurry of a sludge thermal hydrolysis treatment process are increased, and the B / C ratio of the biochemical indexes is increased from 0.24 to 0.5; and 4, due to the adoption of the sludge thermal hydrolysis treatment process, the concentration of odor in the reaction kettle is greatly reduced from the source.

The invention discloses a soft-touch modified material with low volatile organic compounds and low odor and a preparation method thereof and belongs to the technical field of high molecular materials.The soft-touch modified material is prepared from the following raw materials in parts by mass: 20 to 40 parts of high-melt-index co-polypropylene, 10 to 30 parts of glass fiber, 1 to 2 parts of an anti-scratching agent, 15 to 40 parts of high-crystallization homo-polypropylene, 20 to 30 parts of a thermoplastic elastomer, 3 to 5 parts of a compatilizer, 0.3 part of a main antioxidant, 0.2 part of an auxiliary antioxidant and 0.5 part of a lubricant. The soft-touch modified material disclosed by the invention can be used for reducing the odor concentration of the material and the content of the volatile organic compounds; a technology is simple and convenient to operate and the production benefits are high.

The invention provides a sludge dewatering conditioning agent and a use method thereof. The conditioning agent consists of a coagulating agent, a coagulant aid, an oxidant, an ion exchanger and a surfactant. When used, the sludge dewatering conditioning agent is added into sludge according to a certain proportion in a certain manner, can form a grid structure with an effect of adsorbing bridges, and also has relatively strong ion exchange and surface activation wall-breaking capacities, and the mutual synergistic action can greatly improve the sludge dewatering performance. The sludge dewatering conditioning agent has the advantages of simple process flow, high dewatering rate, strong applicability, capability of batch processing and the like.

The invention relates to a deodorant for treating domestic garbage and a preparation method as well as a use method thereof. The deodorant for treating domestic garbage comprises the following components in percentage by mass: 90.0-95.0 percent of modified iron powder, 3.8-7.5 percent of sodium dodecyl benzene sulfonate, 0.8-1.5 percent of sodium carbonate and 0.4-1.0 percent of alkaline protease. The preparation method of the deodorant comprises the following step of: uniformly mixing 90.0-95.0 percent of modified iron powder, 3.8-7.5 percent of sodium dodecyl benzene sulfonate, 0.8-1.5 percent of sodium carbonate and 0.4-1.0 percent of alkaline protease to obtain the deodorant for treating domestic garbage. The use method of the deodorant comprises the following step of: spraying the deodorant to the surface of the domestic garbage, wherein the spray amount is that 0.05-0.20 percent by mass of deodorant is sprayed to every ton of domestic garbage. The deodorant provided by the invention has the advantages of convenience for use, easiness for operation, high reliability and the like; and after the domestic garbage is treated by the method provided by the invention, the removal rate of hydrogen sulfide is 65-70 percent within 96 hours, the odor concentration can be reduced by 42-61 percent, and the release of odor gas can be obviously reduced.

The invention discloses a normal-temperature modified sludge dehydrating agent. The normal-temperature modified sludge dehydrating agent comprises, by weight, 20-30 parts of calcium oxide, 15-20 partsof ferric chloride, 30-40 parts of modified starch, 15-20 parts of diatomite, 5-10 parts of volcanic rock, 20-30 parts of gelatin, 5-10 parts of polyacrylamide, 1-2 parts of bentonite, 2-3 parts of talcum powder, 2-5 parts of muck and 1-3 parts of chitosan. The normal-temperature modified sludge dehydrating agent obtained in the invention is an organic-inorganic mixture, is powdery, contributes to separation of water and sludge particles in sludge, greatly improves the dehydration performance and compressibility of modified sludge, has sterilization and deodorization effects, can kill most ofmicroorganisms, worm eggs and the like, and reduces the odor concentration of the sludge by 90% or above. The addition amount of the dehydrating agent is 2-5%, the addition amount is small, the costis low, and the modification effect is better than that of a traditional modified dehydrating agent.

The invention discloses an organic fertilizer aerobic fermentation method capable of being automatically controlled by utilizing film covering. The organic fertilizer aerobic fermentation method comprises the steps of selecting a fermentation field, digging a ventilation duct, building a heap, covering a film, fermenting and the like. According to the organic fertilizer aerobic fermentation method, a film covering type system, a ventilation system and a control system complement each other to form a unique, economical and effective high-temperature aerobic fermentation system; the method can help the film covering type system to keep temperature, and oxygen concentration and temperature in a material heap are uniformly distributed; a whole heap body can easily reach a temperature conditionof killing pathogens; the concentration of ozone can be reduced by 90 percent to 97 percent and the content of microorganisms in exhausted gas is reduced by 99 percent or more, so that the health ofon-site staff and nearby residents can be protected.

The invention belongs to the technical field of sludge treatment and discloses a low-pressure catalytic thermal-hydrolysis sludge treatment method and application thereof. The low-pressure catalytic thermal-hydrolysis sludge treatment method comprises the following steps of: S1, pouring the sludge and a catalyst to a reaction kettle; S2, pouring saturated vapor of 0.5MPa-1.5MPa to the reaction kettle, stopping the pouring of the saturated vapor and keeping the status for 0-25 minutes to obtain thermally hydrolyzed slurry when the temperature of the sludge reaches 80 DEG C to 180 DEG C. The low-pressure catalytic thermal-hydrolysis sludge treatment method has the beneficial effects that the sludge hydrolysis efficiency is improved by adopting the method of adding the catalyst to the sludge, so that the sludge cells are quickly crushed and the organic substances are quickly hydrolyzed in the presence of the catalyst under the heating condition. The sludge hydrolysis efficiency is improved by adding the catalyst to the sludge, so the saturated vapor of 0.5 MPa-1.5MPa can be poured to the reaction kettle; the saturated vapor pressure is reduced, so that the investment cost is greatly reduced due to the designed pressure drop of the reaction kettle; and moreover, the investment of the supporting devices such as a boiler is greatly reduced under the saturated vapor pressure. Besides, the energy consumption is reduced due to the dosage drop of the vapor, so that the operation cost for sludge treatment is greatly reduced.

The invention belongs to the technical field of sludge treatment, and discloses a method for treatment and comprehensive utilization of sludge based on low-pressure catalytic thermal hydrolysis and an application of the method. The method comprises the following steps of: injecting a catalyst and sludge with the water ratio of 75-90% into a reaction kettle, then injecting saturated steam with the pressure of 1.0-1.59MPa into the reaction kettle, stopping injecting the saturated steam when the temperature of the sludge reaches 60-80 DEG C, and maintaining the situation for 2 to 25 minutes, thus obtaining slurry after reaction; and performing anaerobic digestion reaction on the slurry to prepare a marsh gas. According to the method, the thermal hydrolysis time can be greatly shortened and the treatment efficiency can be improved by adding the catalyst, so that the energy consumption, the running cost, the equipment investment cost and the maintenance cost are reduced. The marsh gas prepared by the method can be used as a fuel for a steam boiler in a system or can be sold, and the purchased energy sources required by sludge treatment are reduced when the marsh gas is used as the fuel for the steam boiler in the system, so that the treatment cost is reduced, and the thorough harmlessness and recycling of the sludge are realized.

The invention provides a fine chemical sewage deodorant and a preparation method thereof, and relates to the technical field of sewage treatment. The fine chemical sewage deodorant is prepared from the following raw materials: modified zeolite, lactic acid bacteria, microorganism compound bacteria, spice, calcium persulfate, hydrogen peroxide, a herba menthae extract, a tea extract, a rhizoma gastrodiae extract, polyethylene glycol, hydroxymethyl cellulose and a disinfectant. The fine chemical sewage deodorant has the advantages that the deodorization rate is high, raw materials are easily available, the cost is low, excellent adsorption capacity is achieved, on one hand, malodorous molecules are adsorbed for deodorization by utilizing intermolecular Van Der Waals' force, on the other hand, the deodorant and substances in odor emitted by the sewage are effectively combined so as to effectively remove the odor, and the deodorant can adsorb the odor in the air and decrease the odor concentration in the air so as to achieve the purpose of deodorization.

The invention discloses a compound type efficient microorganism deodorant for waste blood of flocks and herds and a preparation method thereof. The deodorant can effectively decompose the repugnant substances in the waste blood of flocks and herds and can overcome the defects of insufficient and incomplete effects and unsatisfactory deodorizing effect of various deodorants. The production fermentation technology of the deodorant is simple and the microbial community can be easily cultured and acquired. The compound type efficient microorganism deodorant for waste blood of flocks and herds comprises the following components in parts by weight: 25-40 parts of bacillus coagulans, 20-35 parts of bacillus subtilis, 10-25 parts of bacillus natto and 20-35 parts of enterococcus faecalis, wherein the viable count is 3.0*10<10>-5.0*10<10>cfu / g.

The invention provides a deodorant prepared by using organic solid waste and an application thereof. The deodorant is prepared by using solid wastes such as kitchen garbage, common household garbage, sludge, garden waste, and agricultural vegetable fiber waste, A preparation method is characterized in that household garbage, agricultural waste and sludge are fragmented and mixed according to mass ratio of 1-5: 5-10: 10-15, then activated, anhydrated, carbonized, flushed, and dried to obtain mesoporous and microporous composite structures. According to the deodorant, pore volume can reach more than 0.3cm<3> / g, aperture is 1-3nm, and specific surface area is greater than 600m<2> / g. The deodorant is used for biological treatment or exhaust gas processing for solving the offensive odor processing problem in city, using waste to process the waste, and reducing the discharge amount of atmosphere PM 2.5 substance.

The air circulating trash can having antibacterial and deodorizing functions, according to the present invention, comprises a trash can body (100) having an open top part, and a lid (200) coupled to the top part of the trash can body (100) so as to be able to open and close same, wherein a filter mounting part (210) is formed on the lid (200), and a functional mesh net filter (300) having antibacterial and deodorizing functions is fixedly provided thereon so that the air inside the trash can body (100) and the air outside circulate via the functional mesh net filter (300), while, during ventilation, the functional mesh net filter (300) absorbs and decomposes both the odor and bacteria inside the trash can body (100) as well as the odor and bacteria outside in order to maximally deceleratethe speed of decay of trash due to ventilation, prevent the growth of various germs by the antibacterial effect, decrease the concentration of the odor leaking to the outside by absorbing and decomposing the odor, and inhibit harmful insects such as fruit flies or cockroaches from entering.

The invention relates to the technical field of garden waste recycling, and discloses a garden waste composting process. The garden waste composting process overcomes the problem that malodorous substances generated during fermentation in an existing composting process influence a production environment and the surrounding environment of a factory is solved. According to the garden waste composting process, after leachate is collected, green branch materials are mixed with and soaked in the leachate, and colloid leached from the green branch materials is utilized to adsorb and condense malodorous substances and heavy metal ions in the leachate and separate the malodorous substances and the heavy metal ions from the leachate in a precipitation manner, so the concentration of the malodoroussubstances in the leachate is reduced, the concentration of malodorous substances in ambient air of a regeneration tank is reduced, the accumulative malodorous substances in the leachate are continuously removed in the subsequent circulation of leachate-regeneration liquid-leachate, and the influence of malodorous substances produced in fermentation and composting on the environment is reduced. The invention also discloses a composting process taking the used green branch materials as a raw material, so cyclic utilization is realized, fermentation and composting degrees are improved, and a composting product with few viruses and pathogenic bacteria is obtained.

The invention discloses a preparation method of a compound deodorant capable of reducing odor of livestock manure. On one hand, catechin and other ingredients contained in tea polyphenol of tea residues have a strong chemical adsorption function on polar gas molecules such as ammonia gas, hydrogen sulfide and the like, and tea polyphenol has an inhibition function on growth and propagation of harmful bacteria; on the other hand, fiber of the tea residues has a physical adsorption function on odor substances and an adjustment function on microecological balance of the intestinal tract, essential oil extracted after pine needles, mint leaves and radix glycyrrhizae are mixed is mixed with montmorillonite, the mixture is effectively adsorbed on montmorillonite and mixed with a water extract and the tea residues, the functions of killing bacteria and eliminating inflammation are effectively realized, the compound deodorant has high odor decomposition and absorption functions, and the breeding working environment is improved. The preparation method has a good odor removal effect and is low in cost, the production efficiency is improved while the piggery environment is improved, and the breeding benefits can be improved.

The invention relates to a deodorant for treating domestic garbage and a preparation method as well as a use method thereof. The deodorant for treating domestic garbage comprises the following components in percentage by mass: 90.0-95.0 percent of modified iron powder, 3.8-7.5 percent of sodium dodecyl benzene sulfonate, 0.8-1.5 percent of sodium carbonate and 0.4-1.0 percent of alkaline protease. The preparation method of the deodorant comprises the following step of: uniformly mixing 90.0-95.0 percent of modified iron powder, 3.8-7.5 percent of sodium dodecyl benzene sulfonate, 0.8-1.5 percent of sodium carbonate and 0.4-1.0 percent of alkaline protease to obtain the deodorant for treating domestic garbage. The use method of the deodorant comprises the following step of: spraying the deodorant to the surface of the domestic garbage, wherein the spray amount is that 0.05-0.20 percent by mass of deodorant is sprayed to every ton of domestic garbage. The deodorant provided by the invention has the advantages of convenience for use, easiness for operation, high reliability and the like; and after the domestic garbage is treated by the method provided by the invention, the removal rate of hydrogen sulfide is 65-70 percent within 96 hours, the odor concentration can be reduced by 42-61 percent, and the release of odor gas can be obviously reduced.

The invention provides an air cushion-type under-film landfill deodorizing structure. The air cushion-type under-film landfill deodorizing structure comprises a supporting structure and a deodorizingdevice, wherein the supporting structure is an inflatable cushion with load-bearing capacity; the supporting structure is placed on the working surface of a garbage dump on the same day, and when a garbage covering film covers garbage, the supporting structure is completely covered and a certain margin is left; an inflating device can inflate or deflate the inflatable cushion to expand or shrink the inflatable cushion; in an inflated state of the inflatable cushion, the garbage covering film is lifted up; in the inflated state of the inflatable cushion, the deodorizing device can spray a deodorizing agent under the film according to a control condition. Before film uncovering, the deodorizing device and the inflating device are closed first, so that the film uncovering operation is not affected; and the deodorizing agent is sprayed under the film, the concentration of odor during film uncovering is greatly reduced, so that the discharge concentration of the landfill odor can be greatlyreduced during the film uncovering operation. The air cushion-type under-film landfill deodorizing structure is simple, and can be newly arranged in the existing landfill without the need of pre-planning arrangement before landfill construction.

The invention provides a scaffolding refuse landfill deodorization structure under a film. The scaffolding refuse landfill deodorization structure under the film comprises a support structure and a deodorization device, wherein the support structure is a removable rigid support frame; a rigid support frame garbage cover film is moved to a garbage dump before paving; the whole garbage dump and thewhole rigid support frame are completely covered with the garbage cover film during film sealing; the edge of the garbage cover film is in contact with the ground, and heavy objects are placed at theedge of the garbage cover film; and according to the deodorization device, a deodorant can be sprayed under the film according to the control condition. Before film uncovering, the deodorization device is closed firstly, the film uncovering work is not influenced, and due to the fact that the deodorant is sprayed under the film, the concentration of foul smell during film uncovering is greatly reduced, and the emission concentration of the foul smell in a landfill during film uncovering can be greatly reduced. The structure is simple, the structure can be newly additionally arranged on the basis of an existing garbage landfill, and pre-planning before the garbage landfill is established is not needed.

The invention discloses a negative pressure deodorization system. The negative pressure deodorization system comprises a cabinet, and an inner cavity of the cabinet is partitioned into an upper cavity and a lower cavity through a partition plate. The partition plate is provided with an air guide port for making the upper cavity and the lower cavity communicated. The side edge of the cabinet is provided with an air outlet communicated with the upper cavity and is further provided with an air inlet communicated with the lower cavity. In the lower cavity, a fan, a microorganism attachment box and a dehydration layer are arranged from the air inlet to the interior in sequence. In the upper cavity, a fan, an activated carbon filtration layer and a high-energy ion tube are arranged from the air outlet to the interior in sequence. The air guide port is located between the high-energy ion tube and the dehydration layer. A bottom box is arranged at the bottom of the cabinet. A circulation box is arranged on the partition plate. The upper end of the microorganism attachment box is communicated with the circulation box, and the bottom end of the microorganism attachment box is communicated with the bottom box. A water pump is arranged in the circulation box and connected with sprayers through pulse electronic valves. The sprayers are evenly arranged at the upper end of the microorganism attachment box. The water pump is communicated with the bottom box through a liquid suction tube. A microbial deodorizer is placed in the bottom box. The negative pressure deodorization system is good in deodorization and sterilization effect, capable of preventing secondary pollution and convenient to install and use.

The invention belongs to the technical field of sludge treatment, and discloses a deodorant for treating biological sludge, a preparation method and application of the deodorant. The deodorant comprises the following components by mass percent: 85.0 to 95.0% of ferric hydroxide, 4.8 to 13.0% of ethylenediamine tetra-acetic acid and 0.2 to 2.0% of citric acid. The preparation method of the deodorant comprises the following steps: 85.0 to 95.0% by mass of ferric hydroxide, 4.8 to 13.0% by mass of ethylenediamine tetra-acetic acid and 0.2 to 2.0% by mass of citric acid are evenly mixed, ground and filtered by a 120-mesh sieve to obtain the deodorant for treating the biological sludge. The method for treating the biological sludge by using the deodorant comprises the following steps that: thedeodorant which accounts for 0.05 to 0.50% by mass of the biological sludge is added into the biological sludge, and the deodorant and the biological sludge are evenly stirred to remove unpleasant smells. The deodorant cost is low, the preparation method is simple, the operation for treating the biological sludge by using the deodorant is simple to operate, and the reliability is strong.

The invention provides a special fertilizer beneficial to potato growth. The special fertilizer is prepared from the following raw materials in parts by weight: 80 to 90 parts of straws, 50 to 60 parts of animal wastes, 20 to 35 parts of plant nutriments, 5 to 7 parts of urea, 5 to 10 parts of monopotassium phosphate, 6 to 10 parts of borax, 10 to 12 parts of plant ash, 10 to 12 parts of iron dichloride, 5 to 6 parts of ascorbic acid, 3 to 5 parts of bamboo charcoal, 5 to 7 parts of amino acid, 1 to 2 parts of EM bacteria, 2 to 3 parts of sodium chloride, 3 to 5 parts of dimethyl propane carboxylate, 0.1 to 0.3 part of diethylaminoethanol caproate, 0.1 to 0.2 part of gibberellin, 5 to 10 parts of calcium carbonate, 0.5 to 0.7 part of 2,4-dichlorphenoxyacetic butyl ester, 4 to 8 parts of soil conditioning agents and a proper amount of water. The special fertilizer has the advantages that the nutrition is rich; the sufficient nutrient can be provided for the potato growth; meanwhile, theefficacies of bacteriostasis, desinsection and weeding are achieved; the odor concentration is low.

The invention discloses a refuse landfill earthwork treatment method and device. The refuse landfill earthwork treatment device comprises a miscellaneous fill treatment assembly, a sludge layer treatment assembly and a backfill treatment assembly; the miscellaneous fill treatment assembly comprises a surface cleaning device, a deodorization and dust falling device, a screening treatment device, a water seepage treatment device, a curing agent preparation device and a first stirring device; and the sludge layer treatment assembly comprises a pre-detection device, a curing agent manufacturing device, a second stirring device and a maintaining and tedding device. According to the refuse landfill earthwork treatment device, materials in the operation area are used, cyclic utilization is achieved, and no new waste is generated; in the construction process, odor is effectively inhibited, and raised dust is reduced; and the construction period is short and the efficiency is high.

The invention discloses a lateral flow type sludge modification process. The lateral flow type sludge modification process belongs to a lateral flow system of an activated sludge process. The system comprises a sludge modification machine, a settling pond, an aerobic tank, an anoxic pond and an anaerobic tank, wherein the sludge inlet of the sludge modification machine is connected with the aerobic tank; the anoxic pond and the anaerobic tank are arranged on one side of the aerobic tank; the anaerobic tank is connected with a sludge storage pool; and the sludge storage pool is connected with a sludge outlet of the sludge modification machine. The composition and activity of the outflow sludge are improved, the sludge output of the sewage treatment system is reduced by 15-30 percent, the odor concentration is lower than the human sensory threshold level, and the treatment effect of the sewage treatment system is improved.

The invention provides peculiar smell filtering and water purifying equipment matched with wastewater treatment. The peculiar smell filtering and water purifying equipment comprises a water seepage net and drainage holes, wherein a filtering pipe is mounted at the top of a base, a flushing tank is mounted at the bottom of the filtering pipe, a sewage discharge port is formed in the left side of the flushing tank, a sealing cover is rotationally connected to the left side end face of the flushing tank, a rubber sealing ring is arranged on the inner side of the sealing cover, the number of fixing bolts is four, one of the fixing bolts is rotationally connected to the left side end face of the flushing tank, one end of the fixing bolt is pressed at the outer side end of the sealing cover, a water supply pipeline is mounted on the outer wall of the filtering pipe, the water inlet end of the water supply pipeline is communicated with an external high-pressure water supply pipeline, a watercontrol valve is mounted on the water supply pipeline, and a sewage filter screen is positioned in the filtering pipe. According to the invention, harmful impurities contained in sewage can be filtered, so that the impurities are attached to the sewage filter screen in the equipment, the content of the harmful impurities in the sewage is reduced, and the water quality is improved.

The invention relates to the field of air purification circulating systems, in particular to an air circulation system for breeding industry. The air circulation system for the breeding industry comprises a breeding room, an air purifying room and waste gas treatment equipment inside the air purifying room. The air purifying room is positioned on the left side of the breeding room, and an air inlet is formed in the top of the right side of the air purifying room; a fan is arranged in the air inlet, and a plurality of air inlet pipes are arranged at the top of the cavity of the breeding room; the outer wall of each air inlet pipe is provided with a plurality of air outlets, and the air inlets communicate with the air inlet pipe; a waste gas recovery pipe is arranged at the position, which is close to the bottom, of the cavity of the breeding room; a plurality of waste gas recovery holes are formed in the outer wall of the waste gas recovery pipe, and a waste gas guide pipe is arranged on the side below the waste gas recovery pipe. The problems that the emission of the polluted gas in a traditional breeding plant does not reach the standard, and indoor gas and external gas cannot form a good circulation are solved.

The invention belongs to the technical field of sludge treatment, and discloses a deodorant for treating biological sludge, a preparation method and application of the deodorant. The deodorant comprises the following components by mass percent: 85.0 to 95.0% of ferric hydroxide, 4.8 to 13.0% of ethylenediamine tetra-acetic acid and 0.2 to 2.0% of citric acid. The preparation method of the deodorant comprises the following steps: 85.0 to 95.0% by mass of ferric hydroxide, 4.8 to 13.0% by mass of ethylenediamine tetra-acetic acid and 0.2 to 2.0% by mass of citric acid are evenly mixed, ground and filtered by a 120-mesh sieve to obtain the deodorant for treating the biological sludge. The method for treating the biological sludge by using the deodorant comprises the following steps that: thedeodorant which accounts for 0.05 to 0.50% by mass of the biological sludge is added into the biological sludge, and the deodorant and the biological sludge are evenly stirred to remove unpleasant smells. The deodorant cost is low, the preparation method is simple, the operation for treating the biological sludge by using the deodorant is simple to operate, and the reliability is strong.

The invention discloses a lateral flow type sludge modification process. The lateral flow type sludge modification process belongs to a lateral flow system of an activated sludge process. The system comprises a sludge modification machine, a settling pond, an aerobic tank, an anoxic pond and an anaerobic tank, wherein the sludge inlet of the sludge modification machine is connected with the aerobic tank; the anoxic pond and the anaerobic tank are arranged on one side of the aerobic tank; the anaerobic tank is connected with a sludge storage pool; and the sludge storage pool is connected with a sludge outlet of the sludge modification machine. The composition and activity of the outflow sludge are improved, the sludge output of the sewage treatment system is reduced by 15-30 percent, the odor concentration is lower than the human sensory threshold level, and the treatment effect of the sewage treatment system is improved.