568results about "Landfill technologies" patented technology

An alternative cover for landfill may be formed from a slurry mixture of water, cementitious binder, adhesion enhancing admixture and fiber. These constituents may be mixed and applied to cover landfilled wastes, granular material piles or for soil erosion control. The cover will harden to minimize water infiltration, wind blown dust, odor and affinity to birds, flies and other insects. The water may include tap water, landfill leachate and wastewater. The binder may include Portland cement, blended cement, cement kiln dust, class C fly ash, and/or calcium sulphate hemihydrate. The adhesion enhancing admixture includes water-dispersible polymers. The fibers may comprise shredded paper or wood or plastic fibers.

The invention provides a method through utilization of fast-growing herbaceous plants, of fast-growing alga, or lichen or moss to achieve carbon sequestration. The method includes a first step of planting and/or cultivating the fast-growing herbaceous plants, the fast-growing alga, the lichen or the moss in a selected land area or in a water area, a second step of carrying out harvesting or collecting when the fast-growing herbaceous plants, the fast-growing alga, the lichen or the moss grows to the appropriate height or the appropriate size after a period of time, a third step of carrying out drying on the harvested or collected plants, preferably, carrying out natural drying such as sun drying or air drying to obtain the dry plants, the dry alga, the dry lichen or the dry moss, a fourth step of transporting the dry plants, the dry alga, the dry lichen or the dry moss to a landfill and carrying out landfill, a fifth step of covering a layer of common soil on the final filled plants after the landfill is completed, and a sixth step of recovering vegetations in the landfill.

A covering system that includes a first membrane, a first flotation member coupled to the first membrane. The first flotation member includes a first float and a first float compartment membrane, and the first float compartment membrane is coupled to the first membrane. The covering system also includes a first plurality of gas-relief passageways positioned either within the first float compartment membrane, or within the first membrane and adjacent to the first flotation member. And at least one of the gas-relief passageways within the first plurality is structured so that gas flows unobstructed through it when the system is used. Gas-relief openings formed between overlapping membranes may also be utilized as avenues through which gas may escape to atmosphere from beneath the covers and covering systems. Venting methods are also disclosed. The covering systems and methods may be applied to control odor, algae growth, and heat loss associated with the retaining various liquids, while permitting for the controlled release of gases that are produced.

A system for covering (i.e., closing) various types of sites where waste is deposited comprises a composite of one or more geotextiles that are tufted with synthetic yarns and an impermeable geomembrane, which is comprised of a polymeric material. The cover can include wind-resistant textured synthetic blade-like elements, such as vertical filaments, secured over a low-permeable polymer liner backing. Advantageously, the system does not rely on piled-on weight to resist wind forces and the cover can be deployed over a large area with little or no ballasting or anchoring. Optionally, the cover includes vertical filaments attached to the liner to break the wind aero-dynamics on the exposed cover.

The present invention relates to preparation of a municipal dewatering sludge based coating material for seal of landfill site, is mainly used for seal covering of the landfill site, and belongs to the field of environmental geotechnical engineering. The municipal dewatering sludge is employed as a basis material and modified to be used in seal covering of the landfill site. An air-out layer of the coating material for seal of landfill site has good gas guide performance; an impervious layer is not easily cracking and has low permeability; and a vegetation nutrient layer has rich nutrients and good hydrophobicity. The covering material of the present invention realizes resource utilization of municipal dewatering sludge and saves land resource; the covering material can be produced by industrialized production, has a simple construction for application to seal covering of the landfill site, and has advantages of simpleness, fastness, strong operability, high survival ratio of plants, so as to guarantee quality of seal covering of the landfill site, meet various technological indexes of seal of the landfill site, and greatly improve the landfill environment.

The invention discloses a complex cover material for a refuse landfill. The complex cover material is composed of charcoal, mineralization garbage and incineration ash which are uniformly mixed, the mass ratio of the charcoal to the mineralization garbage to the incineration ash is (3-4) to (3-5) to (1-4), the filling density of the complex cover material is 0.6-1.1 g/cm<3>, the particle size range of the cover material is 5-20 mm, and the specific surface area of the material is 150-280 m<2>/g. The complex cover material provided by the invention utilizes the carrier action of the charcoal, the inoculation action of deodorization microorganisms of the mineralization garbage and the partial hydration gelatification of the incineration ash, so that the stench release amount of garbage and the discharge of greenhouse gases are greatly reduced, and vegetations are supplied with good nutrition; the complex cover material has the advantages of low cost, simple preparation and easy disposition; meanwhile, the mineralization garbage and sludge in a landfill are fully utilized, the utilization of local materials is realized, the effects of recycling garbage, treating waste with waste, reducing the garbage volume occupancy of the landfill and improving environmental protection are achieved, and social benefits and economic benefits are greatly improved; the complex cover material provided by the invention is suitable for the landfill covering treatment of garbage.