71results about How to "Improve the efficiency of anaerobic fermentation" patented technology

The invention discloses a kitchen waste hydrothermal treating method and device. The kitchen waste hydrothermal treating method comprises the following steps of rejecting impurities, separating grease, and extracting waste grease at the upper layer in kitchen wastes; performing first-order hydrothermal reaction, namely electrically heating the kitchen wastes after grease separating to realize sequential temperature rising, wherein the hydrothermal reaction temperature is 200-250 DEG C, the reaction time is 5-25 minutes, and a PH value is smaller than 7; performing heat exchange, namely cooling a reactant obtained after the first-order hydrothermal reaction to 130-180 DEG C by virtue of liquid; performing secondary-order hydrothermal reaction, namely carrying out the hydrothermal reaction on the reactant after heat exchange again, wherein the reaction temperature is 130-180 DEG C, and the reaction time is 40-80 minutes; and performing three-phase separation, namely cooling the reactant after the secondary-order hydrothermal reaction until room temperature, and separating solid, liquid and gas. With the adoption of the kitchen waste hydrothermal treating method, the reaction time is shortened, and the energy consumption is low; the process is flexible and accurate to control; the biodegradability of carbonizing liquid can be optimized, and the efficiency of the carbonizing liquid entering the anaerobic treatment process is improved.

The invention discloses anaerobic fungus-methanogens coculture and a method using the coculture to ferment wheat straw to produce methane. The coculture is naturally-coexisting PiromycesYak TZ+M. ruminantium separated from the rumen fluid of fully-grazing yak of the Gansu Tianzhu Nanniwan pasture of the Qinghai-Tibet Plateau, and the preservation number of the coculture in the China General Microbiological Culture Collection Center is CGMCC No. 12952. When the coculture is used to perform anaerobic fermentation on the wheat straw, a large amount of methane can be produced, the quantity of the methane produced after the coculture degrades the wheat straw for 7 days reaches 3.7mmol/g DM, fermentation time is short, the fermentation process is simple, and the coculture is promising in application prospect.

The invention discloses a methane generator for cattle farms. The methane generator for the cattle farms comprises a material inlet, a generation layer, a settling tank and a back-flushing layer, wherein the material inlet is arranged on the top side of the generator, the generation layer is arranged in the middle of the generator, the settling tank is arranged on the lower portion of the generation layer, the back-flushing layer is arranged on the lower portion of the settling tank, and spiral staggered materials are filled in the generation layer. Wastes in the cattle farms are subjected to anaerobic fermentation by the aid of the novel spiral staggered materials, and by the aid of the intrinsic structural property of the spiral staggered materials, anaerobic fermentation efficiency of the wastes of the cattle farms can be improved, and methane is generated, so that energy is effectively used, and environmental protection is achieved.

The invention relates to an organic waste treatment system, which comprises an arc treatment pool and material net cages. The arc treatment pool includes an inlet aerobic zone, an anaerobic zone and an outlet aerobic zone. The anaerobic zone is located at the bottom of the arc treatment pool. The inlet aerobic zone and the outlet aerobic zone that are communicated with the anaerobic zone are respectively and symmetrically arranged on both sides of the anaerobic zone. An arched top equipped with a gas guide tube is disposed at a position corresponding to the anaerobic zone at the top of the arc treatment pool. A track running through the inlet aerobic zone, the anaerobic zone and the outlet aerobic zone is disposed at the bottom of the arc treatment pool. According to the invention, a material is subjected to hydrolytic acidification in the inlet zone, and is then brought into the anaerobic zone for fermentation to obtain biogas. At the same time, in the anaerobic zone, the biogas is subjected to pressurization and refluxing stirring, so that fermentation blind zones can be reduced, the biogas generation rate is improved, the variety and characteristic of a fermentation raw material are no longer confined, and the operation and construction costs are reduced at the same time.

The invention discloses a mechanical and pneumatic combined dry anaerobic fermentation system. The system comprises a horizontal fermentation tank, a mechanical stirring assembly and a pneumatic stirring assembly, wherein the mechanical stirring assembly comprises a stirring shaft arranged in the axial direction of the horizontal fermentation tank and a plurality of blades arranged on the stirring shaft; the pneumatic stirring assembly comprises a first pneumatic pipe, a second pneumatic pipe and an air supply pipeline connected with the first pneumatic pipe and the second pneumatic pipe, and the first pneumatic pipe and the second pneumatic pipe are sequentially arranged in the axial direction of the horizontal fermentation tank. Through combination of the mechanical stirring assembly and the pneumatic stirring assembly, energy consumption of mechanical stirring is reduced, gas generated through fermentation is used for stirring, energy is saved, the first pneumatic pipe corresponds to the material acid production stage, the second pneumatic pipe corresponds to the material methane production stage, materials in the two stages are stirred in a differentiated mode, the stirring requirements of the materials in different stages are met, and efficient anaerobic fermentation of the fermented materials is facilitated.

A kitchen waste and die-of-disease animal combined treatment technique system mainly comprises a kitchen waste pretreatment system, a die-of-disease animal harmless treatment system, a combined anaerobic fermentation system, a biogas purifying and utilization system, a biogas residue fertilizer making system, a biogas slurry treatment system and a deodorizing system. Organic materials in kitchen waste and wastewater and condensate wastewater in the die-of-disease animal harmless treatment process are subjected to combined anaerobic treatment; generated biogas is purified and then used for power generating and used for a steam boiler, biogas residues are made into compost, part of biogas slurry flows back, and the other part of the biogas slurry is discharged with the standard level; and crude grease extracted from the kitchen waste and die-of-disease animals is used for extracting biodiesel, meat and bone meal obtained after die-of-disease animal harmless treatment is used for bio-fertilizer addition agents, and odors generated in the combined treatment process are discharged with the standard level. According to the kitchen waste and die-of-disease animal combined treatment technique system, the kitchen waste and the die-of-disease animals are treated in a combined mode so as to generate clean energy sources, so that land occupation and investment are saved, the anaerobic fermentation efficiency is improved, significant economic and environmental benefits are brought for the society, and thus the kitchen waste and die-of-disease animal combined treatment technique system has popularization value.

A UASB-two stage A/O-coagulation process for treatment of pig farm biogas slurry. The pig farm biogas slurry successively passes through and is treated in a regulating tank, an upstream anaerobic sludge bed reactor (UASB), a primary anoxic/oxic tank (primary A/O), a second anoxic/oxic tank (secondary A/O), a mid-sedimentation tank, a coagulation tank, a second-sedimentation tank, and a disinfecting tank, and finally is discharged after reaching standard. The two A/O process stages are connected in-series front and back, wherein in the first A/O stage, an active sludge process is employed, so that phosphorous is removed through a sludge discharge method by reducing age and hydraulic retention time of the sludge; and in the second A/O stage, a bio-membrane process is employed and a combined pack is arranged in the tank, so that denitrification is enhanced since a bio-membrane enriches denitrifying bacteria. The combined process has significant nitrogen and phosphorus removal effect and stable treatment effects, is strong in shock load resistance, has simple operation and has low operation cost. After treatment through the combined process to the pig farm biogas slurry, indices of discharged water satisfy demands in Discharge Standard of Pollutants for Livestock and Poultry Breeding (GB 18596-2001).

The invention discloses a method for producing acetic acid from corn straw through anaerobic fermentation. The fermentation bacterial agent adopted in the method is naturally coexisting anaerobic fungi and PiromycesYak Tz+M. ruminantium, which are separated from the rumen liquid of yaks which are fully grazed in the Nanniwan pasture located in Tianzhu, Gansu in the Qinghai-Tibet plateau. The coculture is deposited with the China General Microbiological Culture Collection Center and assigned the accession number CGMCC No. 12952. The coculture is taken as a bacterial agent for anaerobic fermentation of corn straw, acetic acid can be efficiently produced, and in 7 days of a culture period, the coculture can degrade corn straw to generate 49.0 mM of acetic acid. The method is short in fermentation time and simple in fermentation process, and has bright application development prospects.

The invention discloses a method for producing xylanase by anaerobic fermentation of corn straws. A fermentation strain used in the method comprises natural coexisting Piromyces Yak TZ+M. ruminantium coculture separated from rumen fluid of yak fully grazed in a Tianzhu Nanniwan pasture on the Tibetan plateau, and the collection number of the coculture at the China General Microbiological Culture Collection Center is CGMCC No. 12952. The coculture serving as the strain is used for anaerobic fermentation of the corn straws, the xylanase can be efficiently produced, the enzymatic activity of the xylanase generated by degrading the corn straws through the coculture within the culture period of 7 days reaches up to 6905mU, and the method is short in fermentation time, simple and convenient in fermentation process and has a wide application and development prospect.

The invention provides a method for improving the gas yield of biogas fermentation. The method comprises the following steps: mixing straw pulp with an inoculant, magnesium-based olivine powder and mullite powder, and carrying out anaerobic fermentation to generate biogas, wherein a fermentation period is short and the gas yield of the biogas fermentation can be effectively improved. The straw pulp is obtained through ultrasonic crushing and hydrothermal treatment; the contact area between straw components and microorganisms is enlarged and the anaerobic fermentation efficiency is improved; the inoculant is obtained by heaping and retting active sludge and animal and human excrement and then irradiating through 60Co gamma-rays, and is used for promoting the degradation of organic matters;the magnesium-based olivine powder and the mullite powder contain rich metal elements including magnesium, aluminum and the like and can realize a catalytic action; the improvement of the fermentationefficiency is facilitated and the fermentation period is shortened.

The invention provides a small-scale kitchen waste garbage methane system, and belongs to the technical field of biological fermentation. The small-scale kitchen waste garbage methane system comprisesa charging pretreatment device, an S-shaped water sealing pipe, a raw material storing device, a charging control valve, a methane generation device, a methane purifying device and a methane storingdevice which are sequentially connected. From collection of kitchen waste garbage subjected to anaerobic fermentation to produce methane, to methane purification and storage and to final conveyance tousers, whole-course closed loop operation is realized, and resourceful and innocent treatment of the kitchen garbage can be effectively realized. According to the small-scale kitchen waste garbage methane system, automation control is realized in the whole course, man-made excessive intervention is not needed, and the small-scale kitchen waste garbage methane system is safe and reliable and highin applicability.

The invention relates to ammonification anaerobic fermentation equipment for producing straw biogas. The ammonification anaerobic fermentation equipment comprises a gas tank, a first reaction chamber and a second reaction chamber, wherein the first reaction chamber and the second reaction chamber are communicated respectively with the gas tank through gas pipes. The first reaction chamber and thesecond reaction chamber are communicated through a broth backflow pipe. The broth backflow pipe is provided with a flow stop valve. The invention also provides a method of an ammonification anaerobicfermentation. The method comprises that the first reaction chamber and the second reaction chamber are utilized alternately for a continuous fermentation adopting an ammonification reaction and an anaerobic fermentation reaction. The ammonification anaerobic fermentation equipment and method realize a high efficiency biotransformation of straw and an improvement of economic benefits of straw and solve a problem of low anaerobic fermentation efficiency of straw. The ammonification anaerobic fermentation equipment adopts a solar auxiliary heating two-chamber recirculation bioreactor with functions of intermittent feeding and continuous fermentation, does not need applied energy and has a low operation cost. In the invention, a complete conversion of waste straw is realized. The ammonification anaerobic fermentation equipment has a simple structure and a good operability, and is suitable for a large-scale industrial production.

The invention relates to a high-efficiency waste water treatment system for a nursery, belonging to the technical field of waste water treatment. A waste water treatment system for a livestock and poultry nursery comprises a settling tank, a conditioning tank, an anaerobic reactor, an outlet water collecting tank, a sand type outlet water treating tank and a post-treating tank which are connected in order, wherein the anaerobic reactor is composed of a secondary biological nest anaerobic reactor, the biological nest anaerobic reactor comprises an anaerobic fermenter main body and a biological nest device, the biological nest device is arranged in the anaerobic fermenter main body, the lower part of the side wall of the anaerobic fermenter main body is provided with a water inlet, the upper part of the side wall of the anaerobic fermenter main body is provided with a water outlet and a sample connection, and the top of the anaerobic fermenter main body is provided with a gas outlet; and the biological nest device is of a hollow cylindrical structure, the upper wall and the lower wall of the biological nest device are provided with holes, and biological nest materials are filled in the biological nest device. The invention has the characteristics of high treating efficiency, small occupied area, low construction cost, convenient maintenance and operation and the like.

The invention provides a preparation method of a biomass energy block capable of generating biogas. The preparation method comprises the following steps of: firstly, mixing plant straw sections, excrements, cellulose, an aminating agent, anaerobic sludge and a pH (Potential Of Hydrogen) stabilizing agent to prepare a mixed material; then adjusting moisture content of the mixed material by using water, then pressing the mixed material into blocky mixed material, then packaging the blocky mixed material in a vacuum manner by using a plastic film to seal the blocky mixed material inside the plastic film, and carrying out the ammoniation and fermentation treatment at 15-30 DEG C; and then forming holes in the plastic film to evaporate moisture in the blocky mixed material after the ammoniation and fermentation treatment so as to obtain the biomass energy block. The preparation method of the biomass energy block capable of generating the biogas is low in cost and high in gas generation efficiency; and the prepared biomass energy block is convenient to use.

The invention discloses a preparation method for papaya wine. The preparation method includes the steps: S1, taking papaya and grape, triturating the papaya and the grape together, heating in water bath, then adding cooked corn flour, purified water and distiller's yeast, and then fermenting for 18-24 h at the temperature of 30-35 DEG C, to obtain a primary fermentation product; S2, according to an order of laying one equal part of the primary fermentation product and then laying a sugarcane row, putting all the primary fermentation product in a fermentation tank, carrying out sealed fermentation for 5-10 days at the temperature of 28-32 DEG C, to obtain a secondary fermentation product; and S3, taking out the secondary fermentation product, filtering to obtain a fermentation liquid, carrying out sealed fermentation of the fermentation liquid for 15-25 days at the temperature of 20-27 DEG C, filtering to obtain a filtrate, adding papain to the filtrate, then carrying out sealed fermentation for 20-30 days at the temperature of 15-19 DEG C, and filtering to obtain the papaya wine. The preparation method reduces the content of total sulfur dioxide residual in the papaya wine; and the papaya wine has the efficacies of maintaining beauty, keeping young, improving sleeping and delaying senescence.

The invention discloses a bionic dry-type anaerobic fermentation device. The device comprises a horizontal fermentation bin, the fermentation bin comprises a rotation drum, a screen cloth and a driving mechanism, the outer wall of the rotation drum is cylindrical, and the inner wall of the rotation drum is provided with multiple protrusions; the screening cloth is cylindrical and is connected to the inner side of the inner wall of the rotation drum, a feeding pipe is connected to the rotation drum, and the driving mechanism is arranged on the outer wall of the rotation drum and drives the rotation drum to rotate around its axis. According to the device, the dry-type anaerobic fermentation efficiency of organic waste can be obviously improved, so that fermentation is more balanced and complete.

The invention relates to the technical field of fermentation treatment of agricultural waste, and discloses an efficient anaerobic fermentation device and method for livestock and poultry manure. Thedevice comprises a pretreatment system, an anaerobic fermentation system and a collection system, wherein the pretreatment system comprises a grit chamber, an acidification hydrolysis tank and an adjustment metering tank; and a stirring rod of an anaerobic fermentation tank is provided with a semipermeable membrane which wraps anaerobic fermentation bacteria therein. According to the invention, the acidification hydrolysis tank with a controllable pH value and the adjustment metering tank are arranged, so excrement is efficiently pretreated before entering the fermentation tank; the stirring rod in the anaerobic fermentation tank is connected with the semipermeable membrane which is easy to replace and is internally provided with the anaerobic fermentation bacteria; and meanwhile, the controllability and the automation characteristic of the device are improved due to the arrangement of a PLC, so the anaerobic fermentation efficiency of the excrement is effectively improved, and the controllability of instrument operation is high.

The invention discloses a pneumatic agitating system of a biomass anaerobic fermentation tank, and belongs to the technical field of biomass anaerobic fermentation. Biogas, generated from the anaerobic fermentation, is supplied into membrane decarburization equipment after being processed by virtue of dehydrating equipment and desulfurization and purification equipment, so that purified methane is obtained in one aspect and tail gas carbon dioxide, which serves as a pneumatic agitating power source of the system provided by the invention, is obtained in the other aspect; after the biogas is decarburized, the tail gas carbon dioxide, which is compressed by virtue of a compressor, is supplied into a carbon dioxide high-pressure storage tank; the compressed high-pressure carbon dioxide gas is supplied into the anaerobic fermentation tank by virtue of an agitating ventilation pipe, so that high-concentration anaerobic fermentation slurry is agitated. The pneumatic agitating system provided by the invention, which conducts agitating by virtue of high-pressure carbon dioxide gas, is high in anaerobic fermentation efficiency and the pneumatic agitating system has the characteristics of being high in agitating efficiency, simple to operate, safe and environment-friendly.

The invention provides a hydrolysis-impurity removal device and method for fruit-and-vegetable waste slurry. An impurity removal process and a hydrolysis process of the fruit-and-vegetable waste slurry are integrated, the fruit-and-vegetable waste slurry and inoculation liquid are fed through a feeding pipe at the same time and enter a hydrolysis impurity removal tank, and reflux is generated under the action of a feeding baffle; relatively heavy impurities are settled and collected in a conical collecting groove at the bottom of a tank body, lightweight impurities float on an upper layer of a liquid level, and a material liquid level is kept higher than a discharge port; the fruit-and-vegetable waste slurry is hydrolyzed and acidified in a tank under the action of the inoculation liquid, and the hydrolyzed fruit-and-vegetable waste slurry is discharged from the discharge port; materials in the hydrolysis impurity removal tank are continuously pumped out from the upper part of the tank body and circulate to the lower end of the tank body, and the overall homogenizing effect of the materials in the tank is enhanced; and the upper part of the tank body is provided with a slag discharging device and a scum washing measure, so that bridging or blocking in a scum hopper is prevented, and lightweight impurities in the tank can be effectively discharged.