Emission Characteristics And Variation Of Pollutant Compounds And Pollution Assessment In The Initial Decomposition Stage Of Municipal Solid Waste

The signification impact of the collection and transportation of MSW on the urban cities' environment should not be neglected.However,there are less study focus on the initial decomposition stage of MSW.The initial stage normally includes the collection,transportation,and landfilling and releases odorous compounds from organic decomposition.The waste component is the major factor affecting the degree of waste decomposition.In the current study,a self-designed laboratory simulation method was developed for the quality the pollutant(i.e.solid,gas,and liquid)of the initial decomposition of MSW.hence,it is of significant importance to investigate the characteristics of odorous gas emission as well as the effects of waste components and temperature on the initial decomposition stage.Moreover,the carbon flow in waste decomposition was also be analyzed.All above offering a support for the data for establishment of the standards of odorous pollution.In the current study,a laboratory simulation method was developed for the quality the pollutant of the initial decomposition of MSW,which were analyzed to identify the main gas and liquid pollutant in initial stage.The pollutants were mainly released in gaseous form(5137.7 m L)and only 39.6 m L of liquid was produced.A total of 36 VOCs,CO2,and H2 were detected,the highest one was found in CO2,and the less one was found by VOCs.The relationship between the biodegradable waste and the concentration of pollutants was develop.The oxygenates and halogenated hydrocarbons were the most abundant compound in 60%and 45% biodegradable waste compound,while there are number of halogenated hydrocarbons and sulfur compound was found in 15% biodegradable waste.The dissolution rate of leachate decreases while the proportion of biodegradable components in the waste component decreases.Less than 1% of the pollutant in the initial stage of waste release are released into the environment by gas and liquid.The environment impact of the odor pollution in the initial decomposition of MSW was quantified.Methyl sulfide,dimethyl disulfide,carbon disulfide,1,2-dichloroethane,1-butene,n-pentane,ethanol and ethyl acetate were recognized as the most abundant compounds on the initial decomposition stage.Odor pollution was significantly effected on temperature.Moreover,the olfactory evaluation result show that there was obvious olfactory difference at 5?and more than 5?because of the difference on odor concentration.