16 results about "Biogas production" patented technology

This invention belongs to the field of multi-energy dispatching technology, specifically a method and system for multi-energy coordinated adaptive dispatching of photovoltaic, biogas, and thermal storage loads. The method includes establishing a multi-energy coupled system model encompassing photovoltaic, biogas, heat pump, thermal storage, and electrothermal loads; characterizing the nonlinear influence of fermentation temperature on biogas production rate and dynamic heat balance; constructing a two-stage rolling optimization framework: the first stage uses the fermentation cycle as a window to determine the temperature setpoint and biogas storage boundary; the second stage uses a 24-hour window to jointly optimize grid interaction, heat pump heating, thermal storage charging and discharging, and adjustable loads; constructing a Markov decision process in the day-ahead dispatching stage, and solving it using an improved approximate dynamic programming approach; and issuing dispatching commands based on the optimal decision sequence to complete closed-loop execution. This invention achieves coordinated optimization across fermentation cycles and day-ahead dispatching, effectively addressing uncertainties in photovoltaic output and load, and improving renewable energy absorption rate and system operating economy.

The present invention discloses a method and a compact equipment to increase the calorific value of biogas by methanation of CO2 with H2 (Sabatier reaction), relayed on a microreaction system that use geometric periodic open cellular structures (POCS), in which the catalytic system is embedded, to intensify the gas reaction. The compact equipment enables the delocalized biogas producers to benefit the CO2 fraction by increasing the calorific value of gas, avoiding the emission of this gas to atmosphere.

The utility model relates to a system for relieving ammonia inhibition in anaerobic digestion of medium-high temperature kitchen waste, and relates to a system for relieving ammonia inhibition in anaerobic digestion of medium-high temperature kitchen waste. The utility model is to solve the technical problems of low methane yield, high cost and ammonia nitrogen accumulation in the anaerobic digestion process of kitchen waste. The utility model draws negative pressure at the top of the anaerobic digestion tank, has low energy consumption, and can effectively reduce the ammonia nitrogen concentration of the liquid phase part and relieve the inhibition of methanogens. In addition, a small amount of H2 exists in biogas, which can generate methane under the action of hydrogen-utilizing methanogens after being recycled back to the anaerobic digestion tank, thereby increasing the proportion of methane in biogas. The utility model reduces the ammonia nitrogen partial pressure of the gas part in the anaerobic digestion tank, relieves ammonia inhibition in the system, and simultaneously realizes resource recycling, biogas purification and efficiency improvement of biogas production, thereby providing new technical support for improving the medium-high temperature anaerobic digestion of high-protein materials represented by kitchen waste.

This invention relates to a food waste biogas slurry recirculation device and its energy-negative carbonization process, including an intelligent control box, a biogas slurry treatment tank, an elastic brush-type drive mechanism, a dynamic recirculation system, and multi-stage wastewater treatment equipment. The device achieves dynamic optimization of process parameters through online detection of oil content and prediction using an LSTM model. It uses hydrolyzed acidified liquid as a denitrification carbon source and utilizes the waste heat from incineration flue gas to dry the biogas residue, thereby increasing the biogas production rate of the system and reducing dioxin emissions. This solves the technical problems of oil accumulation, high energy consumption, and secondary pollution in traditional processes.

This utility model discloses a wastewater treatment device for cattle farms, belonging to the field of livestock wastewater treatment technology. It includes a treatment tank with partitions a and b fixed to its inner wall, arranged vertically. Partitions a and b have multiple through holes c and d on their sides, respectively. An adjustment and closing assembly for opening and closing through holes c and d is installed inside the treatment tank, and an adjustment assembly is installed outside the tank. This utility model uses the adjustment assembly to drive the adjustment and closing assembly to close through holes c and d, thereby isolating and separating solid impurities at the bottom of the treatment tank from the liquid in the middle. This isolates the solid impurities and wastewater at the bottom of the treatment tank, facilitating the cleaning and discharge of impurities deposited at the bottom. An additive assembly evenly delivers liquid containing a biocatalyst into the wastewater, effectively increasing biogas production and fermentation efficiency, thus improving the overall efficiency and quality of wastewater utilization and treatment.

The utility model relates to a kind of improve kitchen garbage high solid-state fermentation methane production equipment, including reaction tank, the upper end of the reaction tank is equipped with upper cover, the lower end of the upper cover is equipped with helical flow guide groove, and the lower end central position of the upper cover is equipped with stirring assembly, the stirring assembly includes straight rod, the outer surface of the straight rod is evenly distributed straight paddle, and the outer surface of the straight rod is equipped with Z-shaped connecting rod near the position of reaction tank bottom;By setting helical flow guide groove, double vortex is formed by cooperating rotating straight paddle, when low viscosity material produces laminar flow, helical flow guide groove enhances radial mixing, when high viscosity material forms turbulent flow, helical flow guide groove automatically weakens vortex intensity, pure mechanical structure realizes self-regulation, reduce maintenance cost, production cost;By setting cleaning brush, it is repeatedly brushed on the upper surface of filter plate with the rotation of straight rod, prevent acidification after kitchen garbage residue from blocking filter plate.

This invention discloses a photovoltaic and biomass coupled biogas production system, preparation method, and optimized coupling method, belonging to the field of carbon dioxide methanation technology. This invention addresses the biomass-to-biogas process under fluctuating photovoltaic conditions by coupling direct methanation and decarbonization of biogas. The biogas flow rate entering the methanation process is adjusted according to the hydrogen production. Excess biogas enters a carbon separation unit for CO2 storage. Controlling the circulation rate of the biogas methanation reactor ensures a stable space velocity and meets conversion requirements. Simultaneously, the oxygen produced during hydrogen production is used for oxygen-enriched combustion of fermentation biogas residue, overcoming the poor combustion performance caused by the low calorific value and high moisture content of the residue. Furthermore, the heat released from biogas methanation is comprehensively utilized to produce steam, meeting the steam consumption requirements of the electrolytic hydrogen production and decarbonization processes, thus improving the energy efficiency of the coupled system.

The utility model discloses a kind of excrement treatment devices with solid-liquid separation structure for egg chicken breeding, including mounting bracket, the top of mounting bracket is equipped with the feed assembly for receiving the material conveyed by outside and mixing material and the spiral extrusion dehydrator body for receiving the material discharged by the feed assembly and carrying out solid-liquid separation to material, and feed assembly is located on the side of spiral extrusion dehydrator body above, the solid material discharge end of spiral extrusion dehydrator body is provided with material resistance component, material resistance component is provided with material resistance plate, the side outer wall of material resistance plate is provided with the guide rod of annular array distribution. The utility model is convenient for staff to adjust the reaction force formed by material resistance component to the solid material discharged on spiral extrusion dehydrator body, facilitate staff to regulate and control the moisture content of the solid material discharged, so that the solid material after dehydration meets the different resource utilization needs such as composting, biogas production.

A carbon dioxide-neutral biodigester plant includes a biodigester for carbon dioxide-neutral, single-stage or multi-stage production of biogas by fermentation of biomass in a fermentation liquid agitated in presence of elemental hydrogen, hydrogenotrophic and methanogenic archaea, and activated carbon masses, a source of ammonia connected to a first ammonia line, an ammonia cracker to produce hydrogen or a hydrogen-nitrogen mixture by catalytic cracking of ammonia, a first hydrogen line for feeding the produced hydrogen or the hydrogen-nitrogen mixture directly into the biodigester, and a treating device for treating activated coal masses with hydrogen at higher pressure. The treating device includes a pressure line and a treating spray lance. Hydrogen-containing activated coal masses configured as spray cones are injected into the fermentation liquid of the biodigester.

This invention relates to the field of dry straw utilization technology, specifically an anaerobic fermentation process for achieving the harmlessness and resource utilization of dry straw. The process includes: dry straw being transported to a mixing tank via a straw receiving hopper, where it is thoroughly mixed and hydrolyzed with biogas slurry; subsequently, it is pumped into a fermentation tank system for anaerobic fermentation, producing biogas and fermentation slurry; the biogas is temporarily stored in a gas storage tank and later reused in a biogas utilization device; the fermentation slurry is dehydrated in a primary dehydrator, producing primary biogas slurry and primary biogas residue; a portion of the primary biogas residue is returned to the fermentation tank system; the primary biogas slurry is further dehydrated in a secondary dehydrator, producing secondary biogas slurry and secondary biogas residue; a portion of the secondary biogas slurry is purified through a biogas slurry filter, forming clear biogas slurry which is returned to the mixing tank; and the secondary biogas residue is composted in a composting device. This invention solves the problems of limited product sales in feed utilization and the large volume and difficulty in treating biogas slurry generated during traditional anaerobic fermentation for biogas production.

Disclosed, in the present disclosure, is a pretreatment technology capable of increasing the amount of biogas produced in a downstream biogas production process, and improving process efficiency compared to a conventional pretreatment method, by pretreating an organic raw material, such as biomass or organic waste, by means of integration of thermochemical treatment and mechanical grinding.

The present invention relates to a two-phase anaerobic digestion system with increased biogas production. Biochar is applied to an anaerobic digestion system in which an acid fermentation and a methane fermentation are separately performed such that the anaerobic digestion efficiency of organic waste is improved, and thus biogas production can be increased.

This invention discloses a process for the synergistic treatment of multiple wastes using an anaerobic system. Utilizing one or more anaerobic organic wastewater treatment systems, one or more types of externally generated waste are selectively introduced into the system. Organic pollutants in the water act as electron acceptors, and through microbial metabolism, the waste is rendered harmless and recycled, while also enhancing the system's processing capacity, generating energy, or recovering resources. The method includes five treatment modes: treating organic waste to increase biogas production, treating ferrous sulfide waste to recover ferrous sulfide, treating hexavalent chromium-containing waste liquid to recover chromium, treating nitrogen-containing waste to reduce it to nitrogen gas, and controlling sulfur-containing odors and performing in-situ desulfurization. Waste activated carbon is added in slurry form after grinding and fluidization, and the desulfurization mode uses a sulfate-free ferrous salt solution. This invention expands the anaerobic system into a synergistic treatment center for multiple industrial wastes, achieving waste-to-waste treatment, increased energy production, and resource recovery. The process is flexible and highly adaptable.

This invention relates to the field of anaerobic fermentation for biogas production, specifically to a novel anaerobic fermentation unit for manure materials. The unit includes an anaerobic fermenter body with a hollow cavity. A rigid inlet pipe, sealed and inserted into the bottom of the cavity, extends from both ends of the inlet pipe. The right end connects to a material conveying hopper via a secondary feed pipe, while the left end is closed. A rotating rod passes through the left end of the inlet pipe and extends into its cavity, with a rotating seal at its exit point. The rod is rotatable around its own axis. Several blades, including a first blade, are distributed on the outer side of the rod. These first blades are inclined guide blades with sharp edges. This anaerobic fermentation unit for manure materials has the advantages of high gas production efficiency and the ability to rapidly degrade and decompose large particles.

This invention relates to the field of environmental protection technology and discloses a method for the harmless treatment and resource utilization of oil-removed sludge. The method utilizes anaerobic digestion technology to treat the oil-removed sludge, using microorganisms to decompose the organic matter in the sludge, and employing a low-concentration sodium chloride solution to enhance the activity of anaerobic microorganisms and the efficiency of anaerobic digestion, thereby increasing biogas production. The method includes the following steps: S1, adding substrate sludge and distilled water to a reaction vessel; S2, then adding a low-concentration sodium chloride solution and heating and stirring. This method for the harmless treatment and resource utilization of oil-removed sludge achieves resource utilization of the sludge through anaerobic digestion, with low energy consumption, excellent volume reduction effect, and the generation of clean biogas beneficial to humans. It scientifically and safely disposes of sludge while also possessing high economic benefits. Simultaneously, the addition of a low-concentration sodium chloride solution to the reaction system can adjust the osmotic pressure and promote the enzyme activity of microorganisms.

The present invention relates to a 2-phase anaerobic digestion system with increased biogas production capable of increasing the efficiency of anaerobic digestion of organic waste and the amount of biogas production by applying biochar to a 2-phase anaerobic digestion system in which acidogenesis and methanogenesis are carried out separately.