H_2O_2与UV工艺对铜绿微囊藻灭活特点比较

以铜绿微囊藻为研究对象,考察了H2O2与UV工艺对铜绿微囊藻的灭活特点及光合活性的影响.结果表明,在0～2mmol.L-1H2O2投加范围内,随H2O2投加量的增大,对铜绿微囊藻的灭活效果不断提高,藻的光合活性不断下降;而投加量超过2 mmol.L-1后,灭活率并无明显提高;UV工艺对铜绿微囊藻有较好的灭活效果,在藻浓度为35×108个/L条件下,紫外线剂量达91.8 mJ.cm-2即可使藻停滞生长7 d以上;UV工艺对藻光合活性的降低效率高于H2O2工艺,且各活性参数随紫外线剂量的升高呈指数衰减;在达到较好的灭活效果时,UV工艺对藻液UV254升高的控制优于H2O2工艺.

Comparison of H2O2 and UV Processes on the Inactivation Efficiency of Microcystic aeruginosa

Setting Microcystic aeruginosa as study subject, the inactivation efficiency and its effect on photosynthetic activity by H2O2 and UV processes were investigated. The results showed that the inactivating efficiency increased with H2O2 dosage in the range of 0-2 mmol x L(-1), and the photosynthetic activity decreased with it gradually, but the efficiency wasn't enhanced when the dosage exceeded 2 mmoL x L(-1). The inactivation by UV process was high. Under the algae concentration of 35 x 10(8) cells/L, UV dosage of 91.8 mJ/cm2 was enough to inhibit its growth by 7d; UV process was superior to H2O2 in terms of photosynthetic activity, also the parameters could be fitted exponentially well; To guarantee high removal of algae, H2O2 must be dosed excessively, so UV254 of algae solution would be higher than that of UV process.