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2005-07-26_PWETC_AgendaPacket
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2005-07-26_PWETC_AgendaPacket
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3/22/2010 3:57:34 PM
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Commission/Committee
Commission/Authority Name
Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
7/26/2005
Commission/Committee - Meeting Type
Regular
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<br />Attachment B <br />Additional Discussion of the WM/RAA Study at its <br />Minneapolis MRF <br /> <br />Waste Management, rnc and its subsidiary, Recycle America Alliance (WMIRAA) <br />conducted a composition analysis at its Twin Cities Material Recovery Facility (MRF) <br />located in Minneapolis. The study is entitled, Summary - Single-Sort Constituent <br />Test, is dated October 18, 2003, and was provided to the Project Team. <br /> <br />Purpose of Study - The report provides summary information resulting from the <br />sorting and analyses performed by WMIRAA at their Twin Cities MRF. The purpose <br />for the test was to determine the resulting material constituents resulting from single- <br />sort collection and processing. <br /> <br />Methodology - Single stream recyclables loads from fourteen (14) WMIRAA trucks <br />from nine (9) different cities were stockpiled for the test on Friday, October 17,2003. <br />The total stockpile was 74.907 tons. The single stream recycling collection systems <br />utilized the standard WMIRAA lidded carts. Recyclables were loaded into the truck <br />using semi-automated or fully automated collection vehicles. The WMlRAA report <br />states they ran the test on Saturday, October 18, 2003 as a single test batch, but using <br />normal operating procedures for their Twin Cities MRF. Processed materials and <br />residuals were collected and weighed to determine make-up. Operations and data <br />collection were witnessed by Mr. Dave Kohorst, Financial Analyst, acting in an <br />accounting role for the tabulation of data. <br /> <br />Findings - WM/RAA reported that the resulting "Residue Fraction of Processed <br />Materials" from this test as 5.95 percent. The WMIRAA Twin Cities MRF is <br />comprised of two sequential processing systems: the "single stream process system" <br />(Le., screens and sorting stations to recover paper) and "containers process system" to <br />recover glass, cans and plastic products. The residue is derived from unrecoverable <br />materials sorted from both systems, including bulky items, air classifier cyclone <br />"fluff', unmarketable grit, and other trash. It also included floor sweepings. <br /> <br />WM/RAA stated that unrecoverable materials were defmed as materials not targeted <br />for recycling at the Twin Cities MRF. These materials were comprised largely of <br />plastic bags, bulky items and materials incorrectly placed in the recycling cart rather <br />than the trash container by the resident. The WMIRAA study categorized these items <br />as "residue" from plant operations, but should be better termed as "unrecoverable." <br /> <br />The WMIRAA report provided a separate breakdown of products and process residue <br />from both the single stream process system (Le., "paper line") and the container <br />process system ("paper line"). Paper products represented 74 percent of the total input <br />and the paper line produced about two percent residue of total input. Container <br />products represented 21 percent of the total input and the container line produced <br /> <br />7/20/05 <br /> <br />DRAFT <br />
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