Abstract: Based on the characteristics of land treatment system purifying organic pollutants, and absorping nutrient, physical, chemical and biological characteristics of suspended solids in influent and effluent of land treatment system and in control water bodies were analyzed qualitatively and quantitavely by means of integral analytic technique. The difference of suspended solids between influent and effluent of land treatment system is clarified, and thus, the scientific basis for purification of suspended solids by land treatment system has been provided.

Key words: Land treatment system, Suspended solids, Purification rate, Organic pollutants