[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 UV254and96. 8% ± 0. 9% of color at ozone dosage of 200 mg·L- 1. The treated effluent was with COD of below 100 mg·L- 1and color of below40 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- 1and color of about 60 times,failing to meet the emission requirements. Namely,ozone of 290 mg·L- 1was 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 200mg·L- 1,total phosphorus was removed by 63. 5% ± 4. 4%,and the phosphorus concentration in the effluent was remained 1 mg·L- 1or less,directly meeting the emission requirement of GB 16889-2008.