10 results about "Municipal solid waste landfill" patented technology

A system and method for assessing surface methane concentrations through surface emissions monitoring utilizing unmanned aerial vehicles at municipal solid waste landfills. The method uses a combination of UAV-based and ground-based SEM techniques to measure methane concentrations at the surface of a landfill, to calculate zone-average methane concentrations on the surface and to identify methane leaks at landfill cover penetrations.

The utility model relates to sludge in-situ curing equipment for municipal solid waste landfill, which comprises a sludge curing agent mixing device, a sludge curing jet device and an air power system, the sludge curing agent mixing device comprises a storage bin, a conical part is arranged at the lower part of the storage bin, a first stirring paddle is vertically arranged in the conical part, and a second stirring paddle is vertically arranged in the conical part. A discharging pipe is arranged at the bottom of the conical part, a second stirring paddle is horizontally arranged at the discharging pipe, the discharging pipe is connected with a first feeding port of a first spiral conveyor, and a first discharging port of the first spiral conveyor is connected with a jet mixer through a pipeline; the air power system comprises a screw type air compressor, a compressed air dryer and an air storage tank which are connected in sequence, the air storage tank is connected with the jet mixer through a pipeline, and the jet mixer is connected with the sludge solidification jet device. The sludge in-situ curing equipment can be used for crushing caked materials, so that the materials are uniformly mixed, the material blocking risk is effectively reduced, and internal blockage is prevented.

The utility model provides a stabilizing treatment system for a household garbage landfill, which comprises a PLC (Programmable Logic Controller) control device which is respectively connected with a gas extraction well, a water replenishing well and a gas injection well through a gas extraction pipeline, a water replenishing pipeline and a gas injection pipeline; a monitoring and control device and a pollutant treatment device are arranged in each of the air exhaust pipeline and the air injection pipeline; and a monitoring and control device and a pollutant treatment device are also arranged in the water replenishing pipeline. According to the system, through arrangement of various devices, a good oxygen-enriched environment is formed in the domestic garbage body, rapid decomposition of organic matter in a domestic garbage heap body can be accelerated, the purpose of rapidly degrading the organic matter in the domestic garbage heap body is achieved, the domestic garbage in the heap body is stabilized, and garbage excavation and site comprehensive utilization in the later period are facilitated.

This invention relates to the field of landfill leachate treatment and discloses a comprehensive treatment method for leachate from aging landfills, comprising two parts: denitrification and deep decarbonization. Denitrification employs an "OAO+UF" process, while deep decarbonization utilizes a "coagulation sedimentation + Fenton + built-in MBR + ozone + carbon filtration" process. The OAO unit of this invention achieves ammonia nitrogen and total nitrogen levels sufficient for municipal solid waste landfill pollution control standards, and eliminates the need for nitrification liquid return pumps or internal return pumps, resulting in lower energy consumption. The deep treatment section employs a two-stage AOP-based process, which can utilize a combination of Fenton and ozone processes, leading to higher COD compliance stability. This method offers advantages such as smaller footprint, stable operation, good treatment effect, low operating cost, and no concentrate production. The treated effluent consistently meets discharge standards, making it particularly suitable for treating leachate from closed or near-closed aging landfills.

The present invention provides a municipal solid waste landfill excavation, screening, water washing and granulation system and its operating method. The excavated, screened, water-washed and granulated municipal solid waste landfill is recycled as plastic granules, which, compared to the previous method of directly burning in an incinerator, not only reduces carbon emissions, but also generates economic value from the sale of plastic granules, which can be used to offset the cost of excavation and screening. The screening system includes a primary drum screen, a plastic separator, an oversize magnetic separator, an air separator, an undersize magnetic separator, a secondary drum screen, a ferrous metal buffer silo, a humus buffer silo, a humus conveyor, an aggregate buffer silo, and a lightweight material buffer silo; the water washing system includes a No. 1 cleaning tank, a No. 1 scooping machine, a crusher, a No. 2 cleaning tank, a No. 2 scooping machine, a strong washer, a No. 3 cleaning tank, a baler, a sedimentation and clear water tank, a sewage tank, a centrifugal dehydrator, and a sludge plate and frame filter press; and the hot melt granulation system includes a storage yard, a receiving machine, a stranding machine, a cooling water tank, a pelletizer, and a bagging machine.

The invention relates to the technical field of garbage treatment, in particular to a comprehensive analysis method and system for landfill treatment of household garbage. The method comprises the following steps: acquiring field bottom anti-seepage structure data and side slope anti-seepage structure data; analyzing field bottom anti-seepage structure data, and calculating an overall permeability coefficient of a field bottom anti-seepage layer through the series model to construct field bottom anti-seepage performance sub-indexes; slope anti-seepage structure data are analyzed, and a slope stability coefficient is calculated through a slip model to construct a slope anti-seepage performance sub-index; comprehensive evaluation is conducted by combining the landfill bottom anti-seepage performance sub-indexes and the slope anti-seepage performance sub-indexes, and the comprehensive anti-seepage performance index of the landfill is obtained; wherein the material aging factors are considered in the analysis process, and comprise the corrosion aging acceleration effect of the garbage on the impermeable material. Therefore, evaluation covers dynamic risks, and the accuracy of engineering decision making is improved. The problem of lack of objective evaluation is solved, an overall view angle is provided, and engineering decision and risk management and control are facilitated.

The invention provides a spatial attribution method and system for a methane emission source of a household garbage landfill. The spatial attribution method comprises the following steps: automatically retrieving a multispectral satellite image of which the cloud cover reaches the standard in a time window before and after an observation date as an analysis base map, and evaluating the time efficiency confidence coefficient; wind direction standard deviation is introduced to construct a wind direction error fault-tolerant fan-shaped geometry, and dynamic fault tolerance of positioning deviation is achieved; a plurality of spectrum combinations and index enhancement modes are provided, and self-adaptive recognition of working plane boundaries in different background environments is supported; and establishing a hierarchical spatial topology attribution model, sequentially judging the inclusion, ray crossing, fan-shaped overlapping and nearest distance relationship between the coordinate points of the emission source and the polygon of the working plane, and outputting attribution results from the first level to the fourth level and a multi-dimensional quality index. Therefore, the problems of time delay of the base map, significant positioning error, deficiency of attribution confidence, insufficient multispectral utilization, deficiency of wind field modeling and the like are effectively solved, and accurate matching and reliable attribution of satellite monitoring data and ground emission facilities are realized.

This invention discloses a method for remediating acidic mines using humus extracted from municipal solid waste landfills, relating to the technical field of ecological restoration of acidic mine waste sites. The method includes the following steps: excavating municipal solid waste landfills to obtain aged waste, crushing and screening it to obtain screened humus; analyzing the composition of organic matter, nutrients, and heavy metals in the screened humus; harmless screening; nutrient adjustment; soil improvement; vegetation restoration; and monitoring and evaluation of the remediation effect. This method not only reduces the cost and improves the efficiency of acidic mine remediation but also promotes the restoration of the ecological function of the mine waste site through vegetation restoration, while effectively improving the resource reuse efficiency of the screened humus. This invention is applicable to the remediation of different types of acidic mine waste sites, such as pyrite, sulfur-containing metal ores, and ion-adsorption rare earth ores, contributing to the achievement of sustainable development goals.

The present application relates to the technical field of municipal solid waste landfill treatment, and particularly relates to a comprehensive evaluation method for excavation of municipal solid waste landfill; comprising the following steps: carrying out all-round investigation on engineering, waste, environment and external conditions of the landfill, and establishing a complete basic database; carrying out stability evaluation of the landfill, determining the stability grade of the stack according to indexes such as methane concentration and organic matter, and determining whether the landfill can be excavated and whether pretreatment is needed; carrying out safety risk evaluation of excavation, quantifying risks from four aspects of stack stability, gas explosion prevention, seepage prevention protection and slope collapse prevention, and giving prevention and control requirements; carrying out environmental impact evaluation by comprehensively evaluating leachate, odor, dust, noise and secondary pollution; carrying out construction and disposal adaptability evaluation; carrying out economic and construction period evaluation; carrying out real-time monitoring and weighted scoring on the whole process; and realizing the treatment requirements of meeting safe construction, reaching environmental protection standards and being controllable in the whole process.

The leachate treatment system for an ecological landfill includes a landfill area, emergency municipal solid waste leachate treatment equipment, fly ash leachate treatment equipment, and a shared reverse osmosis unit. The landfill area includes an emergency municipal solid waste storage area and a fly ash storage area. Several dividing dams are interspersed within the emergency municipal solid waste storage area, forming several reusable storage areas. Through the redesign of a traditional fly ash landfill, an emergency disposal solution is provided for excess municipal solid waste generated due to sudden equipment failure and reduced incineration capacity. This allows the landfill to flexibly convert the reserved emergency municipal solid waste landfill area into a fly ash landfill area after emergency disposal of municipal solid waste and filling of the fly ash storage area to the designated elevation. A complete treatment system for municipal solid waste leachate and fly ash leachate is designed, utilizing shared equipment to reduce system costs and improving the overall treatment process accordingly.