The Theory And Experimental Research Of Breaking Excess Sludge By Ultrasonic

The sullage the conglomeration of the suspending substance,microorganism, organism adsorbed by the microorganism and a sustance metabolized by microorganism.The nitrogen and phosphor is contained in sullage in the gross, and so does the heavy metal. Because the sullage contains a mass of the pathogeny and it is whiffy even disposed, it repollute the water in case of disposed incorrectly.The disposing sullage technique has been become the one of the important environment protection lessons for the reason that the components of the sullage are complex, which aggravates the environment.On account of the deficiency of the disposing method, it is necessary for exploitationexpl of the new thoughtway.The ultrasonic technique that can improve the sedimentation of active sullage and the dehydration capability by decomposing the biosolids has many advantages, such as the moderation of reaction condition,decompounding rapid,extensive applicability,capability of combining with other technologies.The actiong of ultrasonic on sullage includes of the decompounding sullage and of accelerating dehydration for purpose of reducing the sullage.The principle of disposing sullage is that the indiffrangible solidity substances are changed into diffrangible by breakaging the structure and cell wall makes for the sake of altering sullage structure, outflow of the container in cell.It is different from decompounding the organism in sewage that depends on the shearing strength in the low frequency.The main purpose of this paper is groping research on the decompounding sullage and cognition of the releasing effect, influencing factor and mechanism, which lays the foundations of the application and the facilitating the techniques of stabilization, reduction, resourcing. After disposed by ultrasonic,it is that the qualities of sullage altered, sullage decomposed,substances in cell released, the COD, nitrogen phosphorus, ete.rise by a wide margin in the filtrated sullage, and moreover, the substances released are apt to be decomposed,which are the conditions for reduction and disposing ulteriorly.Therefore, the action of sullage decomposed by ultrasonic is refleeted in the future experiments with a view to research on the variety of COD、TN、TP in the filtrate.I study the contents and main conclusions:(1) constant power, the frequency of ultrasonic fragmentation, respectively0,2,4,6,10,15,20,30min;(2) application of water quality testing methods commonly used SCOD, TN, TP, nucleic acid, particle size analysis, SEM, etc., on the ultrasonic detection of the extent of fragmentation;(3) using Matlab software on the motion equation of bubble, bubble wall velocity, the maximum bubble temperature and pressure, cavitation bubble collapse time simulation;(4) simulation data obtained by the above-mentioned ultrasonic crushing effect of the factors that influence for the future broken promote the use of ultrasound make reasonable suggestions.