7 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 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.

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.

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 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.