The soil purification of sewage is an important way to make sewage resources.Sand,sawdust powder and attapulgite were used to modify the soil filler.Laboratory soil column experiment simulated the soil purification of sewage,and collected soil water,soil samples and gravity flow water in situ.The determination of CODCr,TP and TN in soil water and gravity water showed that the removal rate of total phosphorus and total nitrogen was better than 90％in the modified soil system.The adsorption of pollutants was mainly affected by soil system in the early stage of soil purification.With the prolonging of the time,the purification effect of microorganisms played a major role in the soil system.
维普
万方数据