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  • Landfill leachate treatment equipment

    Source: Author: Time: 2019-07-04 09:54:38 Views: Times

    Landfill leachate treatment equipment is a kind of high-concentration organic wastewater with quite complex composition. If left untreated, it will seriously pollute the surrounding farmland and water system, especially cause groundwater or surrounding environment pollution, and the consequences will be more serious. For the purpose of protecting the environment, it is particularly necessary to treat the leachate. Landfill leachate has different characteristics from general urban sewage: high BOD5 and COD concentrations, high metal content, large changes in water quality and water content, high ammonia nitrogen content, and imbalanced proportions of microbial nutrients.
    Introduction
    With the rapid development of urban construction and the growth of urban population, urban garbage has become one of the main factors of global environmental pollution. At present, the domestic garbage treatment methods widely used at home and abroad mainly include four types of treatment methods: comprehensive utilization, incineration, composting and sanitary landfill. Sanitary landfill is the main method of waste disposal worldwide. During the landfill process, due to waste fermentation and precipitation, groundwater and surface water soaking,
    A large amount of landfill leachate is generated. The treatment of urban landfill leachate has always been a very difficult problem in the design, operation and management of landfills.
    Because there are many factors that may affect the properties of the leachate during the flow of the liquid, including physical, chemical, and biological factors, the properties of the leachate vary within a considerable range. Generally speaking, its pH value is between 4-9, COD is in the range of 2000-62000mg / L, BOD5 is in the range of 60-45000mg / L, NH4-N is in the range of 50-1000mg / L, and SS is 30. In the range of ~ 2000mg / L, TN is in the range of 100 ~ 2000mg / L.
    The concentration of heavy metals is basically the same as that of municipal sewage. Urban landfill leachate is a kind of high-concentration organic wastewater with a rather complex composition. If it is allowed to be discharged, it will seriously pollute the surrounding farmland and water systems, especially the groundwater or the surrounding environment, which will have more serious consequences. For the purpose of protecting the environment, it is particularly necessary to treat the leachate. Landfill leachate has different characteristics from general urban sewage: high BOD5 and COD concentrations, high metal content, large changes in water quality and water content, high ammonia nitrogen content, and imbalanced proportions of microbial nutrients.
    Process flow
    In the leachate treatment method, if the leachate is combined with municipal sewage, it is easy to destroy the activity of microorganisms. In addition, the landfill is usually far from the town, so the leachate often has to be treated separately. The mature and applicable process is: biochemical method + membrane separation method. This process not only has low production cost, but also has good effluent water quality, which meets the newly issued first-level emission standards of the country.
    Because there are many factors that may affect the properties of the leachate during the flow of the liquid, including physical, chemical, and biological factors, the properties of the leachate vary within a considerable range. Generally speaking, its pH value is between 4-9, COD is in the range of 2000-62000mg / L, BOD5 is in the range of 60-45000mg / L, NH4-N is in the range of 50-1000mg / L, and SS is 30. In the range of ~ 2000mg / L, TN is in the range of 100 ~ 2000mg / L.
    The concentration of heavy metals is basically the same as that of municipal sewage. Urban landfill leachate is a kind of high-concentration organic wastewater with a rather complex composition. If it is allowed to be discharged, it will seriously pollute the surrounding farmland and water systems, especially the groundwater or the surrounding environment, which will have more serious consequences. For the purpose of protecting the environment, it is particularly necessary to treat the leachate. Landfill leachate has different characteristics from general urban sewage: high BOD5 and COD concentrations, high metal content, large changes in water quality and water content, high ammonia nitrogen content, and imbalanced proportions of microbial nutrients.
    3T / H waste permeate treatment equipment

    Waste permeate treatment equipment

    Waste permeate treatment equipment

    Waste permeate treatment equipment

    Waste permeate treatment equipment

    Waste permeate treatment equipment

    Landfill leachate is a kind of high-concentration organic wastewater. Its composition is complex and the water quality and quantity vary greatly.
    The sources of landfill leachate mainly include direct precipitation, surface runoff, surface irrigation, groundwater, the moisture of the garbage itself, the moisture in the covering material, and the water generated by the biochemical reaction of the garbage.
    The main factors affecting the composition of landfill leachate are: garbage composition, site climatic conditions, site hydrogeological rainfall conditions, landfill conditions, and landfill time. This determines that the water quality of the landfill leachate changes greatly, and the change law is complicated. The contents of CODcr, BOD5, and ammonia nitrogen are relatively high. With the extension of landfill time, organic nitrogen in waste is converted to inorganic nitrogen, and the ammonia nitrogen concentration increases. The CO2 produced by the degradation of the garbage makes the landfill leachate slightly acidic. This acidic environment exacerbates the dissolution of insoluble carbonates, metals and metal oxides in the garbage. Concentration of metal ions.

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