Comparison Study on Removal Micro-pollutants of Yangtze River Water by Biofilters
>Taking the raw water of Yangtze Riveras the research object, micro-pollutant removal efficiencies of biofilters for the river water were investigated. The results showed that the average removal rate of NH3-N、NO2--N、CODMn、UV254 and BDOC was 80.0%, 95.4%, 25.0%, 12.0% and 68.3% in the biologically-enhanced active filter type I, and 85.2%, 95.4%, 26.2%, 12.0% and 70.0% in the biologically-enhanced active filter type II. The rates in the biologically-enhanced active filter type II were not significantly higher than those in the biologically-enhanced active filter type I（p > 0.05）.The average removal rates of NH3-N, NO2-N, CODMn, UV254 and BDOC by the biological activated carbon filter type I were 84.2%, 95.4%, 24.0%, 16.0% and 67.9%, respectively; The average removal rates of them by the biological activated carbon filter type II were 89.4%, 95.4%, 31.2%, 16.0% and 72.0%, respectively. The removal rates NH3-N, CODMn and BDOC by the biological activated carbon filter type II were significantly higher than those by the biological activated carbon filter type I. The content of organic material with low MW took great part in Yangzi River, in which the proportion of the organics with MW < 1 k Dalton accounted for 48% - 60%. The biologically-enhanced active filter and biological activated carbon filter processes removed the organics with low MW more effectively than that with high MW. For the removal rate of the organics with low MW, the biologically-enhanced active filter type II was more effectively than the biologically-enhanced active filter type I, and the biological activated carbon filter type II was also more effectively than the biological activated carbon filter type I. Therefore, the biofilter process could make up the deficiency in removing the organics with low MW by conventional water treatment process, and could assure good safety of drinking water.
文章引用: 向红 , 吕锡武 , 尹立红 (2013) 不同生物活性滤池处理长江微污染原水的比较研究。 环境保护前沿， 3， 45-53. doi: 10.12677/AEP.2013.31B011
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