50 results about "Municipal solid waste landfill" patented technology

The invention discloses a treatment method for heavy metal polluted sediment. The treatment method comprises the following steps: pumping the polluted sediment into a vibrating screen by a mud pump, carrying out primary sieving on polluted sediment so as to separate gravels and sand grains with the grain diameter being more than 1mm, wherein the dehydrated gravels and sand grains are directly utilized as building materials or filling materials; conveying mud being less than 1mm into a hydraulic cyclone to be further separated; discharging separated mud sand being more than 50 microns into a plate-and-frame filter press to be dehydrated, wherein the dehydrated mud sand is directly utilized as building materials or filling materials; conveying fine slurry being less than 50 microns into a mud preparing tank; conveying prepared mud into a floatation column to be subjected to floating separation; after separation, enriching upwards floating foam on heavy metal, carrying out press filtering and dehydration and conveying the mud into a waste incineration plant or a smelting plant to be treated; and after dehydrating sunk low-pollution clay and fine sand grains, directly conveying the low-pollution clay and the fine sand grains into a municipal solid waste landfill to be landfilled. By adopting the treatment method for the heavy metal polluted sediment, the sediment can be graded and separated, be subjected to volume reduction and quantity reduction treatment and be recycled on site in an efficient and low-cost manner, so that the problems of large treatment amount, high transportation cost and the like in the treatment process of dredging the sediment are effectively solved.

The invention relates to a process system for producing organic soil through classified treatment of municipal solid waste. According to composition characteristics of the municipal solid waste in the system implementation, compostable waste in classified waste is subjected to static aerobic biological fermentation and composting to produce the organic soil, other non-compostable materials can be sold or recycled after re-classification, poisonous and hazardous materials are delivered to a special processing mechanism for processing, waste which cannot be treated or used is sent to a refuse landfill or an incineration plant, and the burying amount of waste can be reduced greatly. According to the system, the accuracy requirement for waste classification is low, the waste source classification operation is simple while follow-up composting treatment is not affected, a composting process is controlled, the quality of produced organic soil products is high, and the purposes of harmlessness, reduction and recycling of the waste are achieved truly. The whole waste classified treatment process is low-consumption, efficient and environment-friendly, full-year production can be realized, and problems about waste classification, treatment and utilization in urban, community and rural areas and the like can be solved effectively.