γ辐射／生物处理工艺处理草浆中段废水的研究

Study on Treatment of Straw-pulp Middle-stage Wastewater by γ-radiation and Biological Treatment Process

对COD浓度为1339～2948mg／L的草浆中段废水，先采用折流式厌氧反应器（ABR）／移动床生物膜反应器（MBBR）组合工艺进行处理，使其COD的浓度稳定在350mg／L左右，然后再采用γ辐射／混凝沉淀进行深度处理。结果表明，在吸收剂量为0．5kGy、Fe2（SO4）3投量为800mg／L的条件下，其最终出水COD≤100mg／L、色度〈40倍，达到《制浆造纸业工业水污染排放标准》（GB3544-2008）。因此，采用γ辐射／生物处理组合工艺处理草浆中段废水是可行的。

To treat the straw-pulp middle-stage wastewater with COD concentration of 1 339 to 2 948 mg/L, anaerobic baffled reactor （ABR）/moving-bed biofilm reactor （MBBR） were used. When its COD concentration was stabilized at 350 mg/L or so, γ-radiation treatment with subsequent coagulation and sedimentation was conducted for advanced purification of the effluent of ABR-MBBR. The results show that when the absorbed dose is 0.5 kGy and Fe2 （ SO4 ） 3 dosage is 800 mg/L, the final effluent COD is equal to or less than 100 mg/L, and the color is less than 40 times, meeting the requirements of the Discharge Standard of Water Pollutants for Pulp and Paper Industry （ GB 3544 - 2008 ）. As a result, the use of γ-radiation and biological treatment process for treating straw-pulp middle-stage wastewater is feasible.