5 results about "Municipal solid waste landfill" patented technology

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 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.