Assessment of the Effectiveness and Effects of Land Disposal Methodologies of Wastewater Management.

摘要

High filtering effectiveness of the soil mantle and maintenance of aerobic conditions by alternating wet and dry periods utilizing spray irrigation and rapid infiltration remove 97% BOD and SS. Overland runoff provides a higher residual (BOD and SS) in the seepage - some filtering capacity is lost due to horizontal transport of the waste water. Nitrogen removal (85%) is in good agreement with agricultural fertilization, phosphorous removal is low in both methods (rapid infiltration and overland runoff). Spray irrigation is more efficient than overland runoff in renovation (adsorption and chemical reaction) of heavy metals. Bacteria and viruses in wastewater are removed by the upper soil mantle using either the spray irrigation or rapid infiltration overland runoff is not as efficient as the former two methods.