Li Simin, Lv Yongkang, Zhao Na
Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China.
ScientificWorldJournal. 2013 Jul 11;2013:952780. doi: 10.1155/2013/952780. Print 2013.
This paper analyses the treatment effect of the "coagulation-sedimentation-O3-biological sand filtration-GAC" combined process on phthalic acid esters in secondary effluent of municipal wastewater treatment plant and meanwhile evaluate its health risk. The results indicated that when the concentrations of DBP and DiOP in secondary effluent were at range of 0.41 mg/L-0.814 mg/L and 0.23 mg/L-0.36 mg/L, the average total removal rates of DBP and DiOP were 85.10% and 68.11%, and the average concentration of DBP and DiOP in effluent were 0.089 mg/L and 0.091 mg/L, respectively. The quality of the effluent met the requirement of the ornamental scenic environment water in The Quality of Urban Wastewater Recycling and Scenic Environment Water (GB/T 18921-2002), and the health risks of DBP and DiOP in effluent were at range of 1.99 × 10(-12) - 2.15 × 10(-12)/a and 1.48 × 10(-11) - 1.85 × 10(-11)/a, respectively, which is lower than the acceptable maximum risk level: 1.0 × 10(-6).
本文分析了“混凝沉淀 - O₃ - 生物砂滤 - GAC”组合工艺对城市污水处理厂二级出水邻苯二甲酸酯类的处理效果，并同时评估其健康风险。结果表明，当二级出水中DBP和DiOP的浓度分别在0.41 mg/L - 0.814 mg/L和0.23 mg/L - 0.36 mg/L范围内时，DBP和DiOP的平均总去除率分别为85.10%和68.11%，出水DBP和DiOP的平均浓度分别为0.089 mg/L和0.091 mg/L。出水水质满足《城市污水再生利用景观环境用水水质》（GB/T 18921 - 2002）中观赏性景观环境用水的要求，出水中DBP和DiOP的健康风险分别在1.99×10⁻¹² - 2.15×10⁻¹²/a和1.48×10⁻¹¹ - 1.85×10⁻¹¹/a范围内，均低于可接受的最大风险水平：1.0×10⁻⁶。
