臭氧在生物活性炭工艺中作用的中试研究

Pilot plant study on function of ozonation in biological activated carbon process

为验证臭氧在生物活性炭工艺中所起的作用,在中试系统上考察了生物活性炭与臭氧生物活性炭工艺对原水有机物的去除效能。结果表明,臭氧生物活性炭工艺对CODMn、UV254、BDOC和AOC的去除率比生物活性炭工艺分别高出21%、37.28%、10%和26.4%。在生物活性炭前设置臭氧工艺不仅能够有效降低出水中的有机物含量,而且可以在较低投氯量的条件下使细菌的致死率达到近100%。因此,为更好地发挥生物活性炭在水处理中对有机物的去除作用,应在生物活性炭前增设臭氧工艺。

In order to examine the function of ozonation in biological activated carbon （BAC） process, the removal capabilities of organic matters from raw water of BAC and O3 -BAC processes were compared by pilot-scale experiments. The results demonstrated that removing rates of CODMn, UV254, BDOC and AOC by O3 - BAC were 21%, 37.28%, 10% and 26. 4% higher than that of single BAC process respectively. Meanwhile, combing ozonation with BAC process could not only decrease the amounts of organic matter in treated water, but also achieve lethal rate of bacteria of nearly 100% even at low chlorine dosage. Therefore, it is necessary to set ozonation process in conjunction with BAC process so as to better improve the performance of the overall system on removing organic matter.