单级和两级串联臭氧-生物活性炭深度处理垃圾渗滤液的比较研究

使用单级和两级串联臭氧-生物活性炭(O3-BAC)处理垃圾焚烧渗滤液的二级生物处理尾水,比较研究了污染物去除效果.结果表明,臭氧投加量为200 mg·L-1时,两级串联O3-BAC对COD、UV254和色度的去除率分别为75.9%±2.1%、78.8%±2.9%和96.8%±0.9%,处理出水COD基本保持在100 mg·L-1以下,色度低于40倍,满足GB 16889-2008排放要求;而单级O3-BAC对COD、UV254和色度的去除率分别为68.2%±1.3%、69.7%±0.5%和92.5%±1.1%,处理出水COD和色度分别为150 mg·L-1和60倍,不能达到排放要求.单级O3-BAC在290 mg·L-1臭氧投加量下,才能达到两级串联O3-BAC在200mg·L-1臭氧投加量下的污染物去除效果.此外,两级串联O3-BAC在臭氧投加量200 mg·L-1时的总磷去除率为63.5%±4.4%,出水总磷浓度稳定在1 mg·L-1以下,直接满足GB 16889-2008排放要求.

Advanced Treatment of Incineration Leachate with O3-BAC and Double O3-BAC

Ozone-biological activated carbon (O₃-BAC) process and double O₃-BAC process were respectively used for advanced treatment of the biologically treated effluent of incineration leachate, and their pollutant removal performances were compared. The results showed that the double O₃-BAC removed 75.9%±2.1% of chemical oxygen demand (COD), 78.8%±2.9% of UV₂₅₄ and 96.8%±0.9% of color at ozone dosage of 200 mg ·L^-1. The treated effluent was with COD of below 100 mg ·L^-1 and color of below 40 times, meeting the emission requirements of GB 16889-2008. At the same ozone dosage, however, the O₃-BAC removed 68.2%±1.3% of COD, 69.7%±0.5% of UV₂₅₄ and 92.5%±1.1% of color. The treated effluent was with COD of around 150 mg ·L^-1 and color of about 60 times, failing to meet the emission requirements. Namely, ozone of 290 mg ·L^-1 was required by O₃-BAC in order to achieve similar pollutant removals as those in double O₃-BAC at O₃ dosage of 200 mg ·L^-1. In double O₃-BAC at ozone dosage of 200 mg ·L^-1, total phosphorus was removed by 63.5%±4.4%, and the phosphorus concentration in the effluent was remained 1 mg ·L^-1 or less, directly meeting the emission requirement of GB 16889-2008.