A REVIEW OF THE LITERATURE REGARDING NON-METHANE AND VOLATILE ORGAINIC COMPOUNDS IN MUNICIPAL SOLID WASTE LANDFILL GAS

摘要

Emission estimations have become an important step in obtaining permit and designing emission controls for municipal solid waste landfills (MSWLF). This is due to the promulgation and implementation of New Source Performance Standards (NSPS) and other regulations for control of non-methane organic compounds (NMOCs) and other hazardous air pollutants from MSWLF. There are agreed upon standard methods for measuring and analyzing the landfill gas (LFG) from MSWLF. However, more work needs to be done to assure reproducibility and consistent application of these methods in sampling and analyzing the LFG from MSWLF. There is a need to document the state of knowledge on sampling, measuring, and estimating LFG and NMOCs emission. This report reviews and compiles information from the current literature regarding concentrations of NMOCs and volatile organic compounds (VOCs) from municipal solid waste (MSW) landfill gas. In addition, a critical review of sample source, concentration, and flux measurement techniques is presented. The NSPS Tier 1default value for NMOCs concentrations in LFG within the landfill is an order of magnitude higher than the recent field measurement (4000 ppm vs. 454 ppm). There is a need to conduct a number of field surveys using a combination of static chamber, just-below cover concentration probe and Fourier Transform Infrared spectroscopy (FTIR) to determine the LFG flux and NMOCs concentrations just above the landfill surface. This data could lead to either a validation or modification of the current NSPS Tier 1 calculations, and AP-42.