Technical Analysis To Treatment Process Of Landfill Leachate Under Normal Temperature Condition

Treatment under intermediate and high temperature has got very effective results, but not in normal and low temperature fields. After analyzing the character of landfill leachate and treatment process, it is decided to use process of ammonia stripping + UBF + SBR + filtration. On base of previous experimental investigation, employ dynamic model, mechanism of mass transfer, material balancing calculation, mathematics fit, and so on, to analyse the whole process. Then it further perfects the assay and theory approach.ammonia stripping is based on solution balance of NH₃ in water and two-film theory of gas-liquid mass transfer. The percentage of NH₃ in water raises with the temperature and pH increase, and reduce with the salinity increases. The gas-liquid mass transfer show us that remove rate raises with stripping time increases. The test analysis of first-order reaction dynamics has good correlation, and we get the dynamics parameter is 0.0947. Also, we get the conclusion that remove rate of ammonia nitrogen by bubble raises with the air demand. According to the experimental research and theoretical analysis, it is suggested to control the pH during 10 to 11, the temperature during 20-25℃, the time as 8h, the quantity of air as 2.0m³/min·m³, and take micropore aeration.We get the remove rate from the dynamic analysis of UBF's state model isη=1/QS₀[q₁X₁V₁+q₂X₂V₂+A_b(ΔL)r],which indicates that when the system operatesstably, the remove rate raises with the sludge concentration and biomembrane thickness increases. Methanogen dynamic analysis gets the methane productivity coefficient is 0.36 mL/mg, and methane output is 0.09 m³/d. Analysis of mass transfer between sewage, granule sludge certificates that host concentration releases from outside to inner of granule sludge and biomembrane.Through the dynamic analysis of host degradation and sludge rise during inlet and reaction stage in SBR, we get that host concentration of mixture raises with filling ration raises. When the filling ration and quality are fixed, host mass concentration releases with sludge mass concentration of mixture and filling time raise. Denitriding dynamic analysis gets that anaerobic and aerobic alternate operation can realize perfect denitrification effect, witch consistence to the experiment conclusion that the operation method of A/O/A/O and inlet batch input has better remove effect.Proving analysis to dynamic model of various action in microscopic migration, adherence and obscission mechanics externalizes the different influencing factor and different active effect in different stage of filter system. These research indicate that filter craft can't make full use of it's advantages, and other crafter can be considered.The whole craft has good compatibility to water quality, water quantity, terrain tract and so on. It has high operational value in practice.