Research On Stabilization Process In Laboratory Simulating Semi-Aerobic Landfill

Based on the simulation experiments, this paper integrality illustrates the mechanism of stabilization and studies the stabilization process and influence factors of the semi-aerobic landfill. An environmental index method is used to evaluate the stabilization level of testing landfill at different stage, and the author tries to propose the measures and techniques which can accelefate the stabilization process of the semi-aerobic landfill.According to the laboratory simulation tests, the author roundly analyzes the leachate quality(COD, ammonia-N), contents of refuse components (VS, BDM) and the regular patterns of settlement during the stabilization process. The results indicate that: the attenuation of COD and ammonia-N of leachate in the semi-aerobic landfill accords with the stair reacting process, and the attenuation coefficient minishes with time; the BDM can reflect the degradation patterns of refuse very well; the settlement can be divided into 3 phase: initial phase, transition phase and strengthened phase, and only the third phase is aroused by the degradation of the refuse; the diameter of leachate pipe and the density of the refuse are two main factors which influences the stabilization process of the semi-aerobic landfill. The author verifies that the semi-aerobic landfill can reduce the environmental pollution, retrench the cost of maintenance and management and shorten the period of the landfill reclamation.Through building the mathematical model of the refuse degradation, the author foretells the stabilization time of the landfill; the measures which can accelerate the stabilization process are summed up. the author evaluates the stabilization process of the semi-aerobic landfill and presents the project of the landfill reclamation.This paper is a good attempt for the semi-aerobic landfill. The test results have some use for reference in the future design.operation and administration of the semi-aerobic landfill.