Landfill Facilities and Equipment for Disposal by Sanitary Landfill

In addition to the control of leachate and landfill gases, a number of other facilities and operating equipment are required for the effective implementation of a sanitary landfill. Personnel requirements are discussed in the following section.

Fire Protection The availability of fire protection facilities at a site should also be considered as fire may break out at the site without warning. Protective measures may be a fire hydrant near the site with portable pipe or fire hose, a watercourse from which water can be readily pumped, a tank truck, or an earth stockpile. The best way to control deep fires is to separate the burning solid waste and dig a firebreak around the burning solid waste using a bulldozer. The solid waste is then spread out so it can be thoroughly wetted down or smothered with earth. Limiting the solid waste cells to about 200 tons, with a depth of 8 feet and 2 feet of compacted earth between cells (cells 20 x 85 feet assuming 1 yd3 of compacted solid waste weighs 800 lb), will minimize the spread of underground fires. The daily 6-inch cover will also minimize the start and spread of underground fires. Fires are a rare occurrence at a properly compacted and operated sanitary landfill.

Weigh Station It is desirable to construct a weigh station at the entrance to the site. Vehicles can be weighed upon entering and, if necessary, billed for use of the site. Scales are required to determine tonnage received, unit operation costs, relation of weight of solid waste to volume of in-place solid waste, area work loads, personnel, collection rates, organization of collection crews, and need for redirection of collection practices. However, the cost involved in construction of a weigh station cannot be always justified for a small sanitary landfill handling less than 20 to 50 tons/day. Nevertheless, estimates of volume and/or weights received should be made and records kept on a daily or weekly basis to help evaluate collection schedules, site capacity, usage, and so on. At the very least, an annual evaluation is essential.

Equipment Requirements To attain proper site development and ensure proper utilization of the land area, it is necessary to have sufficient proper equipment available at all times at the site (see Figure 3.39). One piece of solid waste compaction and earth-moving equipment is needed for approximately each 80 loads per day received at the solid waste site. The type of equipment should be suitable for the method of operation and the prevailing soil conditions. Additional standby equipment should be available for emergencies, breakdowns, and equipment maintenance. Typical equipment requirements are summarized in Table 3.23.

Excavating, Spreading, and Compaction Equipment The type of equipment used at landfills for the spreading and compaction of the material to be landfilled include the crawler, rubber-tired, and steel-wheeled types equipped with bulldozer blade, bullclam, or front-end loader. The crawler tractor with a front-end bucket attachment is an all-purpose piece of equipment (see Figure 3.40). It may be used to excavate trenches, place and compact solid waste, transport cover material, and level and compact the completed portion of the landfill. Some types can also be used to load cover material into trucks for transportation and deposition near the open face. The steel-wheeled compactor is a common piece of equipment at landfills.

A bulldozer blade on a crawler tractor is good for landfills where hauling of cover material is not necessary. It is well suited for the area method landfill in which cover material is taken from nearby hillsides. It can also be used for trench method operation where the trench has been dug with some other type of equipment. A bulldozer is normally used in conjunction with some other type of earth-moving equipment, such as a scraper, where earth is hauled in from a nearby source.

The life of a tractor is figured at about 10,000 hours. Contractors usually depreciate their equipment over a five-year period. On a landfill, if it is assumed that the equipment would be used 1,000 hours a year, the life of the

Landfill compactor

FIGURE 3.39 Typical equipment used for operation of sanitary landfill.

Landfill compactor

FIGURE 3.39 Typical equipment used for operation of sanitary landfill.

TABLE 3.23 Typical Minimum Landfill Equipment Requirements

Service

Daily

Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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