Study On Municipal Solid Waste High Efficient Transportation And Pollution Control Technologies

The design of key equipments and selection of key process for shanghai municipal solid waste containerized waterway transfer system (CWTS) were carried out, and the new equipments were applied in transfer system. The odor control during the transportation of containerized waste and the new technology for treating leachate were also investigated.In consideration of various factors, including technical and operational feasibility, environmental protection, operational cost and energy saving, etc. and operational and scale requirement of containerized waterways transfer system of municipal waste in shanghai, the working floor was recommended serving as waste feeding equipment for this system.The pre-compression process was applied in CWTS. The result of experiment showed that the the density of compressd waste is no less than1.0t/m3only if the the pressure of compactor pusher is no less than50t/m2. The Algor software was used to analyze the stress of pre-pressure chamber, and result showed that the maximum equivalent stress of major parts of chamber is less than180MPa. The maximum equivalent stress occurred at connection of reinforced beam, and which is400MPa.The container is the key equipment in CWTS. This research developed the container, which is with standard interface and high sealing. The structure of container was also optimized. The stress’s distribution and deformation of container under different working condition was analyzed using finite element simulation. The results showed that the thickness of bottom side rail, base, crossmember, top side rail was6mm,4.5mm,4mm,4.5mm, respectively, the maximum stress of container is less than and close to the yield strength of material (345MPa).The working surrounding of low platform semi-trailer and requirement of rigidity of suspension was analyzed. The results showed that the semi-rigid suspension is recommended to the semi-trailer of CWTS and radius of curvature of plate spring is3880mm.The working condition of dump truck was analyzed. The result showed that wheelbase is between4300mm and4400mm, Engine rated power is more than240kw, maximum torque is more than1500Nm, minimum turning diameter is less than21m, the drive type is6*6.The community composition of between Effective Microorganisms (EM) and other deodorants was compared and the dominate populations were determined. The action mechanism of odor control for EM was discussed. The community for controlling odor of landfill was selected. The experiments for determining action mechanism and skin sensitization were conducted and results showed that EM is harmless.The deodorant applied in control odor of waste landfill included Wan Jiefen biological deodorant (A), BIOSTREME deodorant (B)、EM (C)、YL bioactive composite agent (D)、 LA.BIOREASORB+STANDARD deodorant (E). The effects of these five kinds of deodorant on controlling the odor and VOCs emission from containerized waste, which was sited for12hours, were evaluated. The order of reducing odor in container (from high to low) was B, A, E, C, D. The order of reducing odor in surrounding (from high to low) was B, A, C, D, E. The results of reducing VOCs (carbon disulfide, methylene chloride, ethyl acetate, benzene, methyl chloride, toluene, xylene and styrene) in container showed that A had effect on reducing methylene chloride and ethyl acetate, B had effect on reducing methylene chloride, ethyl acetate, benzene and toluene, C only could reduce ethyl acetate, D had effect on reducing benzene, xylene, E only could reduce ethyl acetate and methyl chloride. The results of reducing VOCs in surrounding showed that A only had no effect on reducing benzene, B could reduce all VOCs, C only had no effect on reducing ethyl acetate, D hand effect on ethyl acetate, benzene and toluene, E had no effect on reducing VOCs.The bioreactor was build up with aged sludge as filler. The modification and acclimation of aged sludge, the optimal hydraulic load, the performance of one and two stage bioreactor for treating leachate were investigated. The results showed that the addition9.1%fly ash could improve the performance of bioreactor, the hydraulic load was35.4L/m3/d was feasible and economical, the COD and NH4+N concentration in effluent from two stage reactor was below300mg/L and5mg/L, respectively. The bioreactor was build up with micro-porous particles, which is consisted of aged refuge and fly ash, as filler. The experimental results showed that micro-porous particles have more honeycomb structure, which has good performance in forming biofilm and permeability. Compared to aged refuge bed, the micro-porous particles bed showed the high remove efficiencies of COD and NH4+-N, which is70%and83%, respectively. The removal of total nitrogen could be enhanced30%, when the two stage cascade and reflow process was applied. Community composition was analyzed and results showed that there is higher biological diversity and more nitrifying bacteria in the micro-porous particles bed than aged refuge bed.