氧化-吸附耦合工艺高效处理造纸废水优化研究

Optimization Study on Synchronized Oxidation-Adsorption Process for High-Efficiency Treatment of Paper Mill

关键词:  氧化-吸附  造纸废水  响应面曲面分析法

Key Words:oxidation-adsorption  Pulp and paper wastewater  Response Surface Methodology

摘要:本研究采用氧化-吸附耦合工艺处理制浆废水和造纸废水经生化处理后的混合废水,探讨了硫酸、双氧水、亚铁、芬顿辅助药剂对COD去除率和运行成本的影响,并采用响应面曲面分析法进一步探寻了反应体系的最优运行参数。结果表明,各因素对此反应体系的处理效果影响的影响程度排序为:FeSO4＞H2SO4≈芬顿辅助药剂＞H2O2,最优反应条件为:FeSO4投加量为0.74 g/L,H2O2(27.5wt%)投加量为0.17 mL/L,H2SO4(3M)投加量为2 mL/L,PAM投加量为4 mg/L,芬顿辅助药剂投加量为0.245mL/L进行实验,模型预测出水COD值为30mg/L,而验证实验的平均出水COD值为42mg/L,符合《制浆造纸工业水污染物排放标准》(GB3544-2008)中表3直接排放标准。

Abstract:In this study, a synchronized oxidation-adsorption process was used to treat the mixed wastewater of pulp and paper wastewater after biochemical treatment. The effects of sulfuric acid, hydrogen peroxide, ferrous and Fenton adjuvant on removal of COD and operating cost were investigated. The optimal operating parameters of the process were further explored by Response Surface Methodology(RRM). The results showed that the order of influence of various factors on the treatment efficiency was as follows: FeSO4 > H2SO4 ≈ Fenton adjuvant > H2O2. The optimal reaction condition was as follows: The dosage of FeSO4 is 0.74 g/L, the dosage of H2O2(27.5wt%) is 0.17 mL/L, the dosage of H2SO4(3M) is 2 mL/L, the dosage of PAM is 4 mg/L and the dosage of Fenton adjuvant is 0.245mL/L. The effluent COD predicted by the model is 30mg/L, while the average effluent COD of the verification experiment is 42mg/L, which is satisfied to the Discharge Standard of Water Pollutants for Pulp and Paper Industry (GB3544-2008).