2/19/2002 SEWER COMMISSION Minutes

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Mas pee Sewer Commission MinutesT 0 W _ A ._ 'r n vv 4 E R 1 -.,: 1� V I C L Meeting of February 19, 2002 0 2 t-ll A Y 2 13- A H I 1 16 - The meeting convened at 7:i .m. with members Cahalane and Fudala present. As the Board Secretary was not required to be present due to minimal Commission business, .. .� minutes were kept by Chairman Fudala. Mr. Ed Baker of the CAC requested that his comments and those of others on the ENF should be seat to all CAC members, along with a list of CAC membership. Chairman Fudala indicated that both would be done when the Commission's Stearns wheler's response to Secretary f urand's Certificate on the E F was sent out. Ms.s. Stephanie Jones then' introduced Nelson E. widell of Waste Options Atlantic, LLC, who gage a presentation on his firm's"rotary digester" and associated technologies for composting municipal solid waste and sewage sludge. Ms. Jones was disappointed that the Assistant DPW Director, who was specifically invited due to her roll at the landfill, did not attend this presentation. Waste options Atlantic operates these facilities in Marlboro and Nantucket, under a 20 year agreement in Marlboro and a 25 year agreement on Nantucket. Their operations have resulted in a %-recycling rate in'Marlboro and an % rate on Nantucket. 'heir`Rotary Digester' is a large steel drum tube with baffles which turns slowly while air is blown into it. As 0%of municipal waste is organic, the rotary digester fermentation process is able to turn a- 1 nix of garbage and sludge, with water added if necessary, into primary compost in a number of days (attaining temperatures of 131 degrees f, which kills all bacteria), at which time the material is "' screened to remove plastics, metals etc. and windrowed in an aeration building (air is blown up through the floor into the piles of compost) for weeps before final 3 " screening., For the best cony ost, it should then be lef t in outdoor windrows for about months. The finished p product is considered Class 1 compost, which is allowed to be used for any crops. Topsoil can be made by mixing with sand. All metals have cone out below EPA standards. Marketing of the compost requires approval of the Mate. Leaf and yard waste should be composted separately outdoors, and could then be mixed with their final compost if you want.. Their compost can also be used to inno ulate yard waste to get it started in compost piles. Sludge is not mandatory. A facility in Minnesota adds urea and water instead. Very costly sophisticated odor control air handling system, as Mass. odor control ales are the toughest in the world.