填充床放电等离子体反应器对铜绿微囊藻的生长抑制  

Growth Inhibition of Microcystis aeruginosa in Packed-bed Discharge Plasma Reactor

作　　者：王翠华[1] 李国锋[1] 吴彦[1] 王玉[1] 

机构地区：[1]大连理工大学电气工程系静电与特种电源研究所,大连116024

出　　处：《环境科学》2008年第2期368-374,共7页Environmental Science

基　　金：教育部博士点基金项目(2005141002)

摘　　要：研究了放电等离子体反应器中气量和填加固体玻璃球介质对铜绿微囊藻生长抑制和过氧化氢产量、能量与pH对藻生长抑制,以及填充床反应器对藻叶绿素a和细胞数的影响.结果表明,气量的增加和玻璃球介质的填加虽然提高了放电等离子体反应器处理当天对藻生长抑制的效果,但作用不明显;而随着处理后放置培养时间的增加,藻的光密度先略微增加后显著下降,在气量为0.75 m3/h的填充床放电等离子体反应器中,处理40 min后的样品在放置培养到第5 d时,藻的光密度去除率达到了87.3%;过氧化氢产量也随气量的增加和玻璃球介质的填加而得到提高,尤其是固体玻璃球介质的填加使得放电40 min时(气量为0.75 m3/h),过氧化氢的浓度即从无添加玻璃球介质时的4.6μmol/L提高到了38.3μmol/L,进而提高系统在处理后放置培养过程中过氧化氢对藻的破坏作用;向填充床放电等离子体反应器注入的能量越大,藻生长抑制的效果越明显;弱碱性处理条件对藻生长抑制的作用比弱酸性明显,且酸性溶液在处理当天pH升高,碱性溶液降低,但在放置培养期间均趋于中性;该填充床反应器对藻叶绿素a浓度和细胞数的去除效果显著,在处理40 min后放置培养的第5 d,叶绿素a浓度和细胞数去除率全部达到100%.The paper discussed the effect of the gas flow rate and the addition of glass pellets dielectric on the growth inhibition of Microcystis aeruginosa （ M. aeruginosa ） and the concentration of hydrogen peroxide, the effect of energy input and pH on the growth inhibition of M. aeruginosa and the effect of packed-bed reactor on the algal Chl-a and cell density. The results show that the increasing of the gas flow rate and the addition of glass pellets dielectric enhance the effect of the discharge plasma reactor on the growth inhibition of M. aeruginosa immediately after discharge, but the effect is unobvious. The algal optical density slightly increases and then markedly decreases during the incubation period, e.g., the removal efficiency of the algal optical density is high to 87.3% at the end of the fifth day at an air flow rate of 0.75 m^3/h after 40 min treatment in the packed-bed discharge plasma reactor. The concentration of hydrogen peroxide is enhanced by the increase in the gas flow rate and the addition of glass pellets dielectric into the discharge plasma reactor, too, especially the concentration of hydrogen peroxide enhanced from 4.6 μmol/L to 38.3 μmol/L by the addition of glass pellets dielectric, which will enhance the destructive effect of hydrogen peroxide on the algae during the incubation period. The effect of the growth inhibition of M. aeruginosa is obvious with the increasing in the energy input into the packed-bed discharge plasma reactor. The effect of the alkaline solution on the growth inhibition of M. aeruglnosa is more higher than that of the acidic solution, and the value of pH is inereased under the aeidie eondition and deereased under the alkaline condition, but the tread of pH is to be neutral during the ineubation period. The deerease of the content of Chl-a and cell density is marked in this reactor, and at the end of the fifth day, the removal effieieneies of Chl-a and cell density are high to 100% .

关 键 词：填充床放电等离子体反应器 铜绿微囊藻 玻璃球 生长抑制 

分 类 号：X703.1[环境科学与工程—环境工程] TM89[电气工程—高电压与绝缘技术]