20 results about "Aerobic digestion" patented technology

This invention provides a sludge digestion system that enables accelerated sludge decomposition with a simple configuration. [Solution] The sludge digestion apparatus 1 comprises an aerobic digestion reactor 10 having a sludge supply unit 20, a carrier holding unit 30 provided below the sludge supply unit 20, and an air introduction unit 40 for introducing air into the carrier holding unit 30, and a sludge return means 60 for returning organic sludge discharged downward from the carrier holding unit 30 and supplying it to the carrier holding unit 30.

The utility model relates to a comprehensive water treatment assembly for sewage collection, anaerobic filtration and aerobic nitration devices with communicating devices arranged in series. The comprehensive water treatment assembly comprises an aeration oxygenation water drawing pump, a precipitation tank, a sewage collection bin, a filter, an aerobic digestion filter and an electrical equipment bin, the aeration and oxygenation water drawing pump sequentially comprises an aeration and oxygenation water drawing pump water inlet, a micropore aeration device, a micropore aeration device air delivery pipe, a micropore aeration device positioner, an oxygenation water drawing barrel and an oxygenation water drawing barrel water outlet from bottom to top; the microporous aeration device is mounted at a certain depth or at the bottom in the oxygenating and water drawing barrel and is connected with the gas pipeline, and a precipitation tank, a sewage collection bin, a filter and an aerobic nitrification filter are arranged on a water outlet in the upper part of the oxygenating and water drawing barrel. The principle of a communicating device is fully utilized, the aeration oxygenation water drawing pump is utilized, dirt in the fish tank and harmful ingredients of water are treated by the anaerobic filtration aerobic nitration device, eutrophic ingredients are absorbed by the aquatic plants and the aquatic plants, water quality is improved, and air humidification is achieved through transpiration of the aquatic plants.

The invention provides a harmless treatment method of excess sludge, and belongs to the technical field of sludge treatment. The harmless treatment method of the excess sludge comprises the following steps: crushing the excess sludge, and screening; adding fermentation auxiliary materials into the pretreated sludge to obtain a mixed material; carrying out inactivation treatment on the mixed material; adding nutrient substances into the inactivated mixed material, and adjusting the carbon nitrogen ratio and the pH value of the mixture to obtain excess sludge to be fermented; feeding into an aerobic digestion tank, and carrying out aerobic digestion; and carrying out solid-liquid separation on the residual sludge subjected to harmless treatment to realize reduction and resource utilization of the sludge. According to the harmless treatment method, the biodegradability of the excess sludge and the activity of microorganisms are improved by means of pretreatment, pH adjustment, control of conditions in the aerobic digestion tank and the like, the digestion efficiency is further improved, meanwhile, solid-liquid separation is conducted on the excess sludge, and reduction and resource utilization of the sludge are achieved.

A method for biogas production includes feeding a receiving structure with a feed containing biomass that comprises lignocellulose and directing the feed from the receiving structure into an anaerobic secretome bioreactor (ASB) reactor environment which includes a synthetic microbial community consisting of at least one selected from extremophile thermophilic anaerobic microorganisms that are essentially acidogens and acetogens, the synthetic microbial community producing a secretome of exozymes. The ASB treated biomass is further directed to an aerobic digestion (AD) reactor environment, the ASB treated biomass being pasteurized so as to be essentially free of non-thermophilic microorganisms, the ASB treated biomass comprising liquid effluent containing solubilized biomass products and metabolized biomass products, and solid effluent. Contents or heat are recycled through a conduit between the ASB reactor environment and the AD reactor environment.

The utility model discloses an oxygenating device for aerobic digestion treatment of sewage, and belongs to the technical field of sewage treatment. A mounting base of the oxygenating device comprises an arc-shaped supporting plate and a plug-in air pipe, the arc-shaped inner wall of the arc-shaped supporting plate is matched with an air distribution pipeline, the plug-in air pipe comprises a threaded connection section and a plug-in connection section, the threaded connection section is in threaded connection with a disc type aerator main body, and the plug-in connection section is matched with air distribution holes of the air distribution pipeline; an annular guide boss is arranged on the outer wall of the main body of the inserting connection section, and the outer diameter of the annular guide boss is gradually increased in the direction close to the arc-shaped inner wall; the outer wall of the main body of the inserting connection section is sleeved with a sealing ring, the sealing ring abuts against the end face of the end, close to the arc-shaped inner wall, of the annular guide boss, the outer diameter of the sealing ring is smaller than that of the end of the annular guide boss, and the distance between the sealing ring and the arc-shaped inner wall is matched with the thickness of the pipe wall of the gas distribution pipeline. According to the oxygenating device, the sealing ring can be prevented from falling off, and the air tightness of connection between the base and the air distribution pipeline can be better guaranteed.

The utility model discloses a rural rainwater and sewage diversion integrated treatment device, which comprises an integrated diversion box, an integrated biological treatment unit and a backwashing filter system, and the diversion box is connected with the biological treatment unit and the filter system through pipelines. The integrated biological treatment unit comprises an aerobic digestion area, an anaerobic digestion area and a settling area, the backwashing filter system comprises a filter chamber for fixing a filter medium and a backwashing control device, and through rainwater and sewage diversion, the increase of treatment difficulty caused by mixing of rainwater and sewage is avoided, the pollution load on a water body is reduced, and the water environment quality is improved; research, development and application of the rural rainwater and sewage diversion integrated treatment device are of great significance in improving the rural domestic sewage treatment level and protecting the water environment.

The invention provides a system for synergistically preparing ammonium bicarbonate based on alkalized biogas slurry and aerobic digestion CO2 and an operation method thereof, and relates to the technical field of resource recovery, the system comprises a CO2 gas supply and pretreatment unit, a biogas slurry pretreatment and alkalization unit, an ammonium bicarbonate synthesis reactor, an ammonium bicarbonate post-treatment unit and a control and monitoring unit, cO2-rich gas generated by aerobic digestion of kitchen waste is treated by a CO2 gas supply and pretreatment unit, and then is introduced into an ammonium bicarbonate synthesis reactor to react with alkalized biogas slurry from a biogas slurry pretreatment and alkalization unit to obtain ammonium bicarbonate crystal slurry; and conveying the ammonium bicarbonate crystal slurry to an ammonium bicarbonate post-treatment unit for separation, washing and drying to obtain an ammonium bicarbonate product. The technical problems of high cost, complex process and high energy consumption in the prior art are solved, and the technical effect of integrally preparing ammonium bicarbonate based on direct absorption and aerobic digestion of CO2 by the alkalized biogas slurry is achieved.

Food and organic waste have long been costly and problematic to dispose of as a waste material, despite such waste material having a relatively high potential energy. All industrial treatment routes involve collection and transportation of the raw waste material. Domestic composting and subsequent local disposal as composted material might be carried out for some waste, but this is known to attract pests and vermin. Small-scale aerobic digesters have been developed to produce a stable substrate that can be used as a fuel for biomass burners; however, efficient combustion in such burners is difficult to achieve, and has been hitherto impossible without the co-burning of wood chips / pellets. The present invention provides a biomass burner that uses a primary oxygen feed (13) and gas distributor (15) to fluidize solid particulate fuel (17) within a primary combustion zone (11), whereby solid particulate fuel being conveyed to the primary combustion zone (11) is heated by such combustion, resulting in gasification prior to introduction into the primary combustion zone (11). A duct (27) conveys the combustible gas (25) from the gasification to a secondary combustion zone (29) where a secondary oxygen feed allows total combustion thereof.

The present invention discloses a self-heating aerobic digestion technology for high-concentration organic waste liquid, which belongs to the technical field of high-concentration organic waste liquid treatment and resource utilization. The present invention utilizes extreme thermophilic bacteria to compound targeted functional bacterial agents, mixes high-concentration organic waste liquid (SS is about 100g / L-150g / L) with targeted functional bacterial agents, and maintains a digestion temperature of more than 80°C for at least 5 days through heat assistance + spontaneous heating during the reproduction and metabolism of extreme thermophilic bacteria. The digestion products can be rendered harmless, reduced in quantity and recycled in 7-10 days, and carbon emissions in the treatment process can be reduced by 15-30%. The present invention subverts the technical bottleneck of traditional extreme thermophilic bacteria for aerobic fermentation of organic waste, saves energy, and realizes high-speed stabilization of high-concentration organic waste liquid.

This utility model relates to the technical field of aerobic digestion equipment for activated sludge, and in particular to an aerobic digestion equipment for activated sludge. It utilizes an aeration device and an oxygen enrichment device to enrich the oxygen content of wastewater, significantly increasing the oxidation reaction rate and improving the machine's purification efficiency. Furthermore, the oxygen enrichment aeration simultaneously stirs the wastewater and activated sludge, eliminating the need for mechanical agitation and extending the machine's lifespan. The equipment includes a machine body, an aeration device, an oxygen enrichment device, a discharge device, and a homogenization device. The aeration device, discharge device, and homogenization device are all mounted on the machine body, while the oxygen enrichment device is mounted on the aeration device.

Systems and methods are provided for pre-treating an organic substrate in order to increase the anaerobic and aerobic digestion efficiency of the organic substrate, the system comprising: a conduit adapted to have a flow therethrough, the flow comprising a liquid medium and the organic substrate; an electromagnetic field generator disposed circumferentially around the conduit, the electromagnetic field generator adapted to induce an electromagnetic field into the conduit such that the electromagnetic field is applied to the liquid culture medium when the liquid culture medium flows through the conduit; and a microwave emitter attached to the conduit, the microwave emitter adapted to emit microwave radiation into the conduit such that the microwave radiation is applied to the liquid medium when the liquid medium flows through the conduit.

The utility model relates to the technical field of fermentation devices, and provides a heat accumulating type high-temperature baffling anaerobic fermentation device which comprises an installation chamber, a fermentation mechanism is installed in the installation chamber, and the fermentation mechanism comprises an auxiliary assembly and a transmission assembly. The auxiliary assembly comprises a partition plate, a low-temperature heat exchange baffling hydrolysis area, a nano bubble aerobic digestion area, a medium-temperature heat exchange baffling acidification area, a secondary high-temperature heat exchange baffling acidification area, a high-temperature heat exchange baffling fermentation area, an ultrahigh-temperature disinfection area and a high-temperature baffling fermentation area, and the partition plate is fixedly connected with the inner wall of the mounting chamber. The partition plates divide the heat exchanger into a plurality of chambers, and each chamber performs anaerobic fermentation during heat exchange, so that the occupied area of equipment is reduced, the reaction time is shortened, the treatment efficiency is improved, the quality and quantity of generated biogas are obviously higher than those of the traditional technology, and the system equipment is compact in structure, short in hydraulic retention time, low in energy consumption, high in efficiency and good in effect.

The utility model provides kitchen waste treatment equipment which comprises a box-type body, the box-type body comprises a crushing digestion body and a drainage pool which are located on the two sides, and the crushing digestion body comprises a feeding port located at the top end, a crushing device connected with the feeding port and a digestion device below the crushing device. The drain tank comprises a water inlet positioned at the top end, a flushing pump positioned at the bottom, and a flushing pipe connected with the flushing pump and extending to the inlet of the crushing device; and a flushing nozzle is arranged at the end part of the flushing pipe. The flushing pump is arranged in the drain tank, and the flushing nozzle is arranged at the inlet of the crushing device, so that residual kitchen waste during crushing can be flushed, the use of gears of the crushing device is ensured, the humidity of the mixed kitchen waste in the digestion device is ensured, smooth aerobic digestion is facilitated, and the degradation rate is high.

Methods and processes for producing aerobic digestion products, such as organic acids, from a low-rank coal substrate are provided. Also provided are multistage bioreactor systems for carrying out the described methods and processes. In another aspect, product compositions comprising organic acids produced by the described methods and processes are provided, as well as methods for their use, including for the improvement of soil quality and / or plant growth.

The invention belongs to the field of kitchen waste degradation, and discloses a microbial agent-enzyme preparation composition and a method for rapidly treating kitchen waste. The microbial agent-enzyme preparation composition comprises a compound microbial agent I, a compound microbial agent II and a compound enzyme preparation; the compound enzyme preparation comprises alpha-amylase, saccharifying enzyme, neutral protease, lipase and cellulase; the compound microbial agent I comprises bacillus subtilis, bacillus amyloliquefaciens and lactobacillus fermentum; the compound microbial agent II comprises bacillus subtilis, bacillus licheniformis, lactobacillus fermentum and candida cylindrica. The invention further discloses a liquid kitchen waste treatment method which takes kitchen waste as an object and adopts compound enzyme pretreatment and compound microorganism secondary aerobic treatment as a core. The technical scheme provided by the invention is suitable for aerobic digestion treatment of the kitchen waste, degradation can be completed within 48 hours, and tail water formed after degradation reaches the discharge standard, so that on-site, rapid and harmless treatment of the kitchen waste is realized.

The invention discloses an internal circulation sludge electrolysis system and application of the internal circulation sludge electrolysis system in sludge self-heating microaerobic stabilization, and belongs to the technical field of excess sludge treatment of urban sewage factories, the internal circulation sludge electrolysis system comprises an electrolytic tank and a digestion tank which are connected in series; wherein a sludge discharge port of the electrolytic tank comprises reticular zero-valent iron, and the area of the reticular zero-valent iron is 1 / 3 of the area of the electrolytic tank. The invention also provides an application of the internal circulation sludge electrolysis system in sludge self-heating microaerobic stabilization. According to the invention, the self-heating micro-aerobic digestion stabilization rate of the sludge can be obviously improved, and the volume of a digestion device for treating unit mass of dry sludge is reduced by more than half, so that the capital construction facility construction cost and the occupied area of a city with land shortage are reduced.

The present application provides a kind of continuous micro-aerobic digestion methane production method of organic solid waste, it relates to microorganism digestion methane production.The method comprises the following steps: organic solid waste and anaerobic sludge are loaded into reactor for anaerobic digestion;After anaerobic digestion reaction is stable, start to continuously import air or oxygen into reactor, maintain the dissolved oxygen content in reactor in 0.20-0.35 mg / L range;When the daily gas production of reactor decreases compared with the daily gas production of previous day, start to supplement organic solid waste into reactor, daily feed quantity is calculated according to hydraulic retention time, daily feed quantity and discharge quantity are equal, and the gas produced in reactor is collected by exhaust port.By the above method, continuous gas production in the same reactor can be realized, which overcomes the defect that when two-phase digestion is used, the reaction substance needs to be transferred after micro-aerobic aeration is completed, which increases the operation complexity and is not suitable for continuous digestion methane production.

Methods and processes for producing aerobic digestion products, such as organic acids, from a low-rank coal substrate are provided. Also provided are multistage bioreactor systems for carrying out the described methods and processes. In another aspect, product compositions comprising organic acids produced by the described methods and processes are provided, as well as methods for their use, including for the improvement of soil quality and / or plant growth.

The utility model is based on a harmless disposal and resource utilization device for industrial waste sludge, comprising an industrial flying sludge holding tank, a plurality of drainage holes are opened at the bottom of the industrial waste sludge holding tank, and a lower baffle is correspondingly arranged; a comprehensive treatment module is correspondingly arranged at the tank opening of the industrial waste sludge holding tank; the comprehensive treatment module comprises a treatment module setting frame of a connection and a rotating part, and a medium-temperature treatment module and a compression module are arranged on the treatment module setting frame; the industrial waste sludge is loaded into the industrial waste sludge holding tank, the medium-temperature treatment module is used as a medium-temperature aerobic digestion treatment part for primary treatment, the rear lower baffle descends, the compression module is used as a compression and dewatering treatment part of the industrial waste sludge after the primary treatment, the rear lower baffle rises to support the bottom of the industrial waste sludge holding tank, and the compression module compresses the industrial waste sludge, so as to form a rapid harmless disposal and resource utilization structure for industrial waste sludge.

The invention provides a preparation method and application of a magnetic composite electron mediator material for driving anaerobic iron respiration coupling carbon reduction. Researches find that by adding MnFe2O4 into an anaerobic system, the degradation of SCOD and the daily yield of CH4 can be improved, and the anaerobic digestion process is remarkably enhanced. Besides, in combination with a microbial community structure and functional gene analysis, it is shown that MnFe2O4 mediated DIET with VFAs oxidized into an electron sink can be established among Acetoanaerobium, Syntrophomonas and Methanosaeta, so that decomposition of PCOW is promoted. Therefore, it is further shown that proper supplement of MnFe2O4 in the anaerobic digestion process is a feasible way for optimizing the protein organic wastewater treatment process. The MnFe2O4 in the invention is synthesized by a hydrothermal coprecipitation method.