活性炭吸附用于城市污水地下回灌技术的研究

通过静态吸附试验比较与Ｃｒｉｔｔｅｎｄｅｎ计算模型分析,选择ＧＨ－１６型粒状活性炭对北京高碑店污水处理厂二级出水进行深度处理试验。结果表明：ＧＨ－１６型活性炭的净化效果存在阈值,约２５％的ＤＯＣ不能被吸附,不被吸附的主要是分子量〉３０００ｕ的有机物。对以ＵＶ２５４表征的有机物去除效果最好,分子量〈１０００ｕ的弱极性有机物易被微孔吸附且吸附容量,对以ＡＯＸ表征的极性有机物去除效果较差。二级出水经活性

An Experimental Study on Activated Carbon Adsorption Used in Groundwater Recharge with Municipal Wastewater

Using the secondary effluent from Gaobeidian Wastewater Treatment Plant, different kinds of granular activated carbon ( GAC)were studied for advanced treatment of the effluent. Results of adsorption isotherrn test and Crittenden model analysis showed : GH - 16 granular activated carbon had the best adsoption efficiency of organic substances characterized by the UV absorbance at 254 nm . The weak - polar organic compounds with molecular weight less than 1 000 u were easily removed and the adsorption capacity was large . On the contrary , those with molecular weight more than 3 000 u were difficult to remove . The effluent from secondary setting tank became more amenable to biological degradation after activaied carbon filtration . GAC bed could run for 4 000 bed volume and the adsorption capacity was 25 mgDOC/g carbon.