调理吸附稳定法处理低含油沉积物

Treatment of Low Oily Sediments by Conditioning,Adsorption and Stabilization Method

通过吸附、分散、固定等协同作用,可将沉积物中的有机物、重金属等污染物转化为不易溶解、不易迁移的状态。针对含油量<5%、含水量<60%的低含油、低含水污水池沉积物,调理吸附稳定技术可实现大规模、快速的处理。应用该技术处理孤岛某污水池底沉积物约8×10^3^ m3,药剂投加量为沉积物质量的10%,强化养护时间≥3d,处理后沉积物含油量<2%,浸出液的氨氮、pH值及石油类达到GB 8978-1996《污水综合排放标准》一级标准,COD去除率约80%。

Through the synergistic action of adsorption,dispersion and fixation,the organic and heavy metals in sediments can be transformed into the state of insoluble and less migratory.For the sludge with oil content less than 5%and water content less than 60%,the technology can achieve large-scale and rapid treatment.The application scale of this technology to treat oily sludge in a sewage pond in Gudao is about 8000 m^3.The dosage of reagent is 10%,the curing time is more than 3 days,the oil content in the treated sediment is less than 2%,the ammonia nitrogen,pH and petroleum in the leachate meet the requirements of GB 8978-1996,and the COD removal rate is about 80%.