摘要：Peat and mushroom residues were selected for adsorption isotherm and adsorption kinetics experimentsand to comparatively discuss the effects of removing ammonia-nitrogen and the total phosphorus inwastewater. The results showed that the peat and mushroom residues for removing ammonia-nitrogen and the total phosphorus followed the Freundlich and Langmuir equations of the adsorptionisotherm. By using a fitting equation, we obtained the static adsorption quantities of ammonia-nitrogen,which were 2.3679 mg/g and 2.1643 mg/g, and the static adsorption quantities of total phosphoruswere 1.4363 mg/g and 1.3758 mg/g. A first-order kinetics equation was used to fit the reactionprocess of the two-substrate adsorption of ammonia-nitrogen and the total phosphorus. The correlationcoefficients were all desirably above 0.990. Furthermore, the adsorption rates of ammonia-nitrogenwere 0.0088 g/(mg·min) and 0.0084 g/(mg·min), and the adsorption rates of the total phosphoruswere 0.001 g/(mg·min) and 0.0006 g/(mg·min). In a simulation of the soil percolation system, a volumeratio of 10% peat and 10% mushroom residues with different sizes of 0.5, 2 and 4 mm were mixedwith the soil in different treatments (T1-T6), and the control group was the soil (CK). The concentrationof ammonia-nitrogen in the wastewater was 54.45-78.96 mg/L, and the hydraulic loading was 0.08 m 3 /(m 2 ·d). The performance of seven types of experimental devices for removing ammonia-nitrogen in thewastewater was T2 > T3 > T1 > T6 > T5 > T4 > CK. The average concentration of ammonia-nitrogenin the effluent water was 65.58 mg/L, and the removal rate of ammonia-nitrogen and the total phosphorusreached 88.04-95.32% and 89.23-97.08%, respectively, which satisfied the additional minimum UWTDtreatment performance for a discharge to a sensitive area.
