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| CALCULATION OF HORIZONTAL landfill. The calculation of the horizontal tank is to determine the length and width of the tank at a given depth of his conditions of detention of a sump defined percentage of the suspension. When calculating the tank based on the following provisions: 1) septic tank may be delayed, all the particles, the trajectories of motion are in the process of settling cross-plane of the bottom tank, and 2) the size of tank must be designed for worst-case scenario, i.e., conditions of detention of the particles, located at inlet of water in the sump in the upper layer flow, as they are doing a longest path to the bottom, and 3) of all possible received the most probable trajectory of movement of particles suspended in the sump, which is obtained by assuming that the vertical component of velocity is constantly directed up and equal in magnitude to its mean square, and 4) the value of the horizontal velocity is taken throughout the depth of sedimentation constant, equal to its average value. CALCULATION OF VERTICAL Drain The calculation of the vertical tank is to determine the cross-sectional area of the deposition zone, designed to highlight the water flaky suspension, as well as the amount of sediment and necessary area of cell flocculation. Sedimentary part of the landfill. The volume of sediment of horizontal and vertical tanks, if they do not provide hydraulic or mechanical device for the continuous removal of deposits should provide a welcome and compaction of sediment within 8-24 hours - a period when the water contains lighten the largest number of suspensions. To remove from horizontal tanks precipitate them periodically emptied or use special systems running without draining the tanks. Such systems can be hydraulic or mechanical. As stated above, the hydraulic system to remove sludge is perforated tubes or boxes, stacked on the bottom of sump. As a mechanical system to remove sludge from septic tanks without emptying their used scraper mechanisms that periodically or continuously shift the sludge to the hopper, located at the beginning of the sump. From the bunker sludge produced in sewage sludge or to the site. Structurally, the scraper mechanism may represent two parallel endless chains, which are attached to the board-scrapers. Last move along the tank, moving the sludge to the hopper. Humidity sediment to be removed from the horizontal tank depends on the properties of the sediment and receiving sediment bunker. To remove from the open horizontal sediment ponds are used on the pontoons refulery traveling on settling with ropes and winches. |