Abstract: Typical aquatic organic waste Myriophyllum verticillatum samples were pressed at a pressure of 0-10 MPa, and the water content of the dewatered samples and the quality of the filtrate were examined. The results found that when the pressing pressure was 2.5 MPa, the mass of Myriophyllum verticillatum could be reduced by 53.85% and the volume reduced by more than 80%. The COD, suspended solids concentration and total phosphorus content in the press filtrate could not meet the Class III water discharge requirements of GB 3838—2002 Environmental Quality Standards for Surface Water, and further treatment was needed. The protein content could reach more than 200 mg/L, which has certain potential for resource utilization. The organic components of lake water and leachate include protein-like, fulvic acid-like and humus-like substances. Among them, the lake water was dominated by protein-like substances, while the content of fulvic acid-like and humus-like substances in the leachate was significantly higher.

Key words: aquatic plants, filter press dewatering, water quality, quantitative reduction, parallel factor analysis