活性无烟煤过滤去除饮用水中氨氮研究

Biologically Enhanced Filtration with Activated Anthracite for Removal of Ammonia Nitrogen from Drinking Water

活性无烟煤是一种新型滤料,既具有普通滤料的过滤功能,又具备活性炭的特点。研究了活性无烟煤过滤去除氨氮的效能,并与石英砂、无烟煤和活性炭进行了对比。结果表明,四种滤料对浊度的去除率达90%以上,出水浊度均小于0.2 NTU;活性无烟煤和活性炭过滤出水氨氮浓度<0.3 mg/L,其去除率平均为94%,石英砂和无烟煤过滤对氨氮的转化不彻底,导致出水亚硝酸盐氮浓度比进水高出0.58 mg/L;活性无烟煤和活性炭对TOC的平均去除率分别为33.4%和38.3%,对UV254的平均去除率分别为43.6%和50.5%。活性无烟煤作为一种新型滤料在生物活性滤池改造领域具有独特优势。

Activated anthracite is a new kind of media used for filtration. It can perform like both the common filtration media and activated carbon. Filtration performance with activated anthracite was tested to compare with quartz sand, anthracite and granular activated carbon. The results showed that the turbidity of effluent after filtration with four types of media was less than 0.2 NTU, and the removal effi- ciency＇of turbidity was over 90%. Filtration with activated anthracite and activated carbon could remove about 94% of ammonia, and the ammonia concentration in effluent reached less than 0.3 mg/L. The transformation of ammonia after filtration with quartz sand and anthracite was not completed, the nitrite concentration in effluent got accumulated, even 0.58 mg/L higher than that in influent. The removal rates of TOC and UV254 with activated anthracite and activated carbon were 33.4% and 38.3% , 43.6% and 50.5%, respectively. The results suggested that activated anthracite is of significance in upgrading a water plant.