论文部分内容阅读
针对西安市某污水处理厂的倒置A2/O工艺,通过对主要构筑物的布点检测,分析了污水中4种制药类污染物非那西汀、咖啡因、吉非罗齐和胆固醇的浓度变化及其去除规律.结果表明,污水厂进水中非那西汀、咖啡因、吉非罗齐和胆固醇的浓度分别为8.22、127.31、12.93和5.61μg·L-1,整个污水处理工艺中,非那西汀、吉非罗齐和胆固醇主要是被格栅、曝气沉砂池和初沉池去除,咖啡因则以生物降解为主.A2/O生物反应池中,吉非罗齐和胆固醇以厌氧生物降解为主,非那西汀和咖啡因则以好氧生物降解为主.脱水污泥中非那西汀、咖啡因、吉非罗齐和胆固醇的含量分别为0.09、2.62、12.24和0.91μg·g-1,污泥对吉非罗齐的吸附效果最为显著.污水厂出水中制药类污染物的浓度为0.17～1.98μg·L-1,出水中咖啡因的浓度偏高因而需要做进一步的三级处理.
According to the inverted A2 / O process of a sewage treatment plant in Xi’an, the change of concentration of four pharmaceutical pollutants, such as phenacetin, caffeine, gemfibrozil and cholesterol, in wastewater was analyzed by detecting the distribution of the main structures. The results showed that the concentrations of phenacetin, caffeine, gemfibrozil and cholesterol in influent were 8.22, 127.31, 12.93 and 5.61 μg · L-1, respectively, The naloxetine, gemfibrozil and cholesterol were mainly removed by the grille, aerated grit chamber and primary sedimentation tank while caffeine was mainly biodegraded. Gemfibrozil and cholesterol The main anaerobic biodegradation, phenacetin and caffeine aerobic biodegradation are mainly dehydration sludge phenacetin, caffeine, gemfibrozil and cholesterol levels were 0.09, 2.62, 12.24 and 0.91μg · g-1, respectively, the most obvious adsorption effect of gemfibrozil was on sludge.The concentration of pharmaceutical pollutants in effluent of wastewater treatment plant was 0.17-1.98μg · L-1, the concentration of caffeine in effluent was high Thus need to do further three levels of treatment.