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以华北油田某深井的高浓度钻井废水(COD高达14 460.0 mg/L)为研究对象,提出了酸化-混凝-催化氧化-吸附的组合处理工艺。重点研制了钻井废水催化氧化处理催化剂(镍基催化剂),通过实验确定了最佳工艺参数条件。着重考察了催化氧化处理的工艺条件,在pH值为4,次氯酸钙投加量为4.4 g/L,催化剂投加量为1.6 g/L的条件下COD降至403.5 mg/L,进一步吸附处理后COD降至139.9 mg/L、色度为30倍、石油类含量为3.8 mg/L、pH为8.0和SS浓度为52mg/L,最终出水水质达到《污水综合排放标准》(GB 8978-1996)二级标准,处理成本为84.8元/m3。
Taking the high concentration drilling wastewater from a deep well in Huabei Oilfield (COD up to 14 460.0 mg / L) as the research object, a combined treatment process of acidification-coagulation-catalytic oxidation-adsorption was proposed. The catalyst for catalytic oxidation of drilling wastewater (nickel-based catalyst) was emphatically researched, and the optimal process parameters were determined through experiments. The process conditions of catalytic oxidation were emphatically investigated. The COD was reduced to 403.5 mg / L under the conditions of pH 4, calcium hypochlorite 4.4 g / L and catalyst dosage 1.6 g / L, After the adsorption treatment, COD dropped to 139.9 mg / L, the chromaticity was 30 times, the petroleum content was 3.8 mg / L, the pH was 8.0 and the SS concentration was 52 mg / L, the final effluent quality reached the “Integrated Wastewater Discharge Standard” -1996) two standards, processing costs 84.8 yuan / m3.