Landfill and Wastewater Treatment RNG Chemical and Physical Profiling: Increasing the Database Set
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2011-08-15
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TRIS Online Accession Number:01640220
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Edition:Final Report
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Abstract:The purpose of this USDOT PHMSA sponsored research project was to address the continued development of a draft guidance document for the safe introduction of renewable gas into natural gas pipelines. This project was designed to build upon previous studies executed by GTI to further characterize and understand the chemical and biological composition of fully upgraded renewable gas. Gas samples (with an emphasis on post-clean up) were collected from landfills and subjected to quantitative analytical chemical and biological tests to measure the concentration of target species. The focus was on samples from facilities currently producing high BTU renewable gas. The two criteria for target species are that they (1) are likely to be in the product gas and (2) have potential to impact pipeline integrity or end use applications. The results of this study are not intended to endorse any specific clean up technologies or create national standards for concentration limits for constituents of concern. This project was cancelled before the complete set of samples could be collected and analyzed. To date, samples were collected from six different landfills. Two landfills were collected a second time to examine seasonal variation, for a total of eight sites, and twenty-four samples. The clean up technologies used at the six landfills include membrane (one site), PSA (two sites), and physical solvent (three sites). The complete database of analytical results collected to date is reported in the Appendix. A limited amount of statistical evaluation was started before the project was cancelled, this data is also presented in the Appendix. The data evaluation, to be performed in Task 2, had not started.
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