Effectiveness Research About Ozone Oxidation On Disintegration Of Sludge And Treatment Of Sewage

Sewage sludge is a byproduct of the biological treatment process due to highmoisture content, complex components, in addition to containing a lot of organicmatter, but also contains many eggs of parasites and other pathogenicmicroorganisms, and many accompanied by the stench, if not properly disposedof, will have serious secondary pollution. How to find cost-effective treatmentand disposal of sludge has become a widespread concern of all parties, andcontinue efforts to develop a variety of new sludge treatment technologies. Inrecent years, the Chinese and foreign scholars have proposed to disintegratesludge ozonation treatment technology, and has made some achievements, butthere are still many technical and engineering aspects of the issues that needsfurther study and discussion.To take advantage of ozone catalytic oxidation cracking sludge technologyresearch and investigate the effectiveness and feasibility, prepare polymerizationof alumina as the carrier of copper, nickel-component catalyst, and characterizedby scanning electron microscopy SEM (Scanning Electron Microscope) andelectron probe microanalysis EDMA (Electron Probe Microanalysis) microscopiccharacterization analysis, structural properties of the catalyst from themicroscopic point of view; on the basis of experimental study of ozone bycatalytic oxidation treatment sludge process, different catalysts dosage of ozoneabsorption impact rate, COD, ammonia nitrogen, total phosphorus, pH and other indicators; simultaneously in order to compare and analyze the performance ofsewage sludge ozone catalytic oxidation, in the same test environment, landfillleachate and sewage were also ozone catalytic oxidation test, emphasis on theeffect of different catalysts and different dosage of ozone oxidation time forsludge, landfill leachate and sewage treatment effects.Experimental results show that, in the process of adding ozone oxidationcatalyst can improve sludge from a solid to a liquid conversion, promote flocbreak; For sludge, landfill leachate, sewage, the dosing catalyst, can effectivelyimprove the removal efficiency of COD; under the same experimental conditions,the optimum mass ratio of3, COD effect of ozone oxidation of sewage treatmentis best, the removal of up to68.29%; ozone in sludge catalytic oxidation process,since the ozone dosage is consumed more floc break, so only reach34.16%CODremoval; whether or leachate sludge, sewage, ozone catalytic oxidation of NH4+-N removal efficiency did not appear, And because ozone preferential oxidation oforganic nitrogen was converted to ammonia, and ammonia and difficult to furtheroxidized by ozone, resulting in the system ammonia rise, not fall, indicating thateven with the presence of a catalyst, ammonia is also difficult to ozone oxidationsubstances; With the catalyst adding, pH value of sludge and landfill leachatelittle change, but because of the relatively low concentrations of organicwastewater, may produce partial alkaline intermediate product in the process ofozonation, pH value of wastewater with small amounts of catalyst dosage wasincreased upward trend. The main role is to be a catalyst to promote ozone oxidation, adsorption isvery limited, ozone reaction time have an impact on the ozone catalytic oxidationeffect; ozone catalytic oxidation treatment sludge, after adding the catalyst,ozone and sludge contact time is not longer the oxidation better, there is anoptimum contact time, this time over the oxidation effect of variation; ozoneoxidation time has an important influence on the removal COD, TP of sludge,landfill leachate and sewage, within a certain time range, better removal withtime, the time beyond which no further increase its removal.