论文部分内容阅读
采用异养菌总数计数(HPC)法检测了北京地区J水厂活性炭滤池中微生物量,并分析了活性炭滤池进出水中有机物的组成、活性炭的吸附作用及微生物作用对溶解性有机碳(DOC)去除的贡献率.结果表明,不同炭龄、不同运行周期活性炭滤池中的微生物量有显著的差异.由于溶解性可生物降解有机碳(BDOC)占溶解性有机碳(DOC)的比例较小,且受微生物数量、活性等因素的影响,微生物对DOC的去除效果极为有限,在1.5年和5年炭龄活性炭滤池中对DOC的去除率仅占总去除率的18.8%和26.4%.此外,微生物对较为敏感的嗅味物质2-MIB和geosmin去除作用也不显著,去除率在15%以下(初始浓度为100ng.L-1);在使用5年活性炭滤池中,微生物对2-MIB和geosmin去除率为12%和14%,分别占总去除率的32%和29%.因此,北京地区地表水净水厂活性炭滤池中微生物对有机物控制的贡献率较低,对DOC的去除主要以活性炭的吸附为主.
Microbial biomass in activated carbon filter of J waterworks in Beijing area was measured by HPC method. The composition of organic matter in the influent and effluent of activated carbon filter, the adsorption of activated carbon and the effect of microorganism on the dissolved organic carbon ) .The results showed that there were significant differences in microbial biomass in activated carbon filters with different carbon ages and different operating cycles.Because the ratio of soluble biodegradable organic carbon (BDOC) to dissolved organic carbon (DOC) The removal efficiency of DOC by microorganisms was very limited due to the quantity and activity of microorganisms. The removal rates of DOC in the activated carbon filter of 1.5 years and 5 years carbon only accounted for 18.8% and 26.4% of the total removal rate, respectively. In addition, the removal of 2-MIB and geosmin, the most sensitive odorants for microorganisms, was also not significant, the removal rate was below 15% (the initial concentration was 100 ng.L-1); in the 5-year activated carbon filter, The removal rates of 2-MIB and geosmin were 12% and 14%, respectively, accounting for 32% and 29% of the total removal rates respectively. Therefore, the contribution of microorganisms to organic matter control in the activated carbon filter of surface water purification plant in Beijing was relatively low. Removal of DOC is mainly activated carbon adsorption Attached to the main.