The Test Of COD Removal On Constructed Rapid Infiltration System And Constructing The Effective Height Model Of The Filtre

Constructed Rapid Infitration System(CRI) is a totally new wastewater process system,which is developed on the base of traditional wastewater land treatment technology,And is on the purpose of batching water controlly into the natuer medium surface with better penetrating quality,and then in this process,wastewater is purified because of a serise of functions,such as biological oxidation,nitration,dentrification,infiltration,deposition,oxidation and deoxidation, when penetrating rapidly under gravity action.Firstly,this experiment chooses several common,and economically feasible (the river sands,charcoal,iron powder,and stone powder) experiments,and studies them in a static conditions for organic material will make a performance of the removal for COD which (the river sands and the charcoal) is efficiency,and accomplishes the models for the filler artificial materias choice. Secendly,for example of the river sands,a study on its water solution to the average COD,and we use the primary and secondary kinetic model to analyse the organic, energetto the organic law,the result can develop and perfor the effluent disposal process of water pollution control and restoration of theory.After the materials'choice,we completed to establish three small lab models which simulate the CRI cystem.The column 1 is a traditional CRI cystem pool,whose materials add for 5%of the stone powder,The column 2 add 10% of charcoal's,and the column 3 add 5% of the iron powder.We repeated the experiment of the three simulation pillars in order to find out the efficiency of removal the concentration of COD,so we use the experiment date of column 2.On the basis of Mann A.T.'s study,we established the removing kinetic model which is relex to the in-out water COD and the height of the contaminants.lt can be used as the gists in the practical engineering design and operation.Because of the current determine the level of the CRI are usually based on specific target used to determine the practical work experience (Practical engineering debugging) method, which is lack of science,mathematics and logic,this study calculated at different levels in water COD and under the hydraulic loading conditions CRI system for COD degradation dynamics on the basis of experiments,the reasoning of the CRI are established for the effective system of mathematical model,CRI system for the fast through the establishment of a theoretical support.