异养硝化菌生物增强活性炭处理低温水的效能

Efficiency of Heterotrophic Nitrification Bacteria in Biologically Enhanced Activated Carbon Process for Treatment of Low Temperature Water

为研究异养硝化菌Y7和Y16对低温水的处理效果,构建生物增强活性炭(BEAC)滤柱,其中A滤柱接种Y7菌株,B滤柱接种Y16菌株,C滤柱接种Y7+Y16混菌,以不接菌活性炭滤柱(D)作为对照。在5℃下研究了工艺对氨氮和COD Mn的去除效果、亚硝酸盐氮与硝酸盐氮的积累特征以及进水DO含量和滤速对BEAC工艺运行效果的影响。结果表明,BEAC工艺对氨氮的去除效果优于GAC,其中C滤柱对氨氮的降解能力最强,运行期间并未出现硝酸盐氮与亚硝酸盐氮积累现象,启动期间对氨氮的最大去除率达到26.88%,对COD Mn的最大去除率达到85.12%。进水溶解氧浓度对各滤柱去除氨氮和COD Mn几乎没有影响;低滤速有利于BEAC对氨氮的降解,但对去除COD Mn的影响较小。

Biologically enhanced activated carbon （BEAC） filter columns were constructed to re- search the efficien The filter columns cy of heterotrophic nitrification bacteria Y7 and Y16 for treating low temperature water. A, B and C were inoculated with Y7 strains, Y16 strains and Y7 ＋ Y16 mixed bacte- ria, respectively, the filter column D was not inoculated as a control. The removal of NH4 - N and CODMB, the accumulation of NO2- - N and NO3 - N and the influence of different dissolved oxygen （DO） concentrations and filter speeds on the BEAC process were investigated at temperature of 5 ℃. The results showed that BEAC process was better than GAC process in NH4＊ - N removal, and the filter column C had the best removal efficiency of NH4＋ - N. The accumulation of NO2- - N and NO3 - N did not occur, and the maximum removal rates of NH4＋ - N and CODM, in the filter column C were 26.88% and 85.12%, respectively. Influent DO concentration had little impact on NH4＊ - N and CODM. removal in each filter column. Low filter speed was favorable for degradation of NH4＋ - N by BEAC, but not for removal of CODM..