Land treatment of sludge 453
Topographical and seasonal suitability Tillable land, not usable on wet or frozen ground. Tillable land, not usable on wet or frozen ground.Characteristics Sludge discharged into furrows ahead of plow mounted on tank trailer- application of 170 – 225 tons/acre; or sludge spread in narrow band on ground surface and immediately plowed under- application of 5-125 wet tons/acre. Sludge discharged into channel opened by a tillable tool mounted on tank trailer; application rate 25 – 50 tons/acre; vehicle should not traverse injected area for several days.Table 9.7 Application methods and equipments for liquid and some semi-solid sludge (continued)MethodPlow furrow cover Subsurface injection1 acre = 0.405 ha 1 ton/acre = 2,470 kg/ha1 gallon = 3.785 L From Knezek and Miller (1978)