METHOD FOR DEHYDRATING AND DEODORIZING AQUEOUS SLUDGE THROUGH FIRST DEHYDRATION STEP, RAW MATERIAL MIXING STEP AND POST-TREATMENT STEP, AND REMEDIATED SOIL OBTAINED THEREBY

摘要

PURPOSE: To provide an aqueous sludge treatment method for mixing aqueous sludge with steelmaking dust without fuel and treating the mixture to deodorize the aqueous sludge such that the deodorized mixture is used as remediated soil, and a remediated soil obtained by the aqueous sludge treatment method. CONSTITUTION: A method for dehydrating and deodorizing aqueous sludge comprises: a first dehydration step of dehydrating aqueous sludge to a moisture content of 60 to 90 wt.%; a raw material mixing step of mixing 100 weight parts of the aqueous sludge dehydrated in the first dehydration step with 20 to 70 weight parts of steelmaking dust and 10 to 30 weight parts of quicklime in a mixer for 1 to 5 minutes; and a post-treatment step of sieving a product obtained from the raw material mixing step, and handling the sieved product such that the product is easily transported and stored, wherein quicklime is mixed with a mixture of the aqueous sludge and the steelmaking dust after mixing the aqueous sludge with the steelmaking dust in the raw material mixing step.