Don't Budge on Sludge
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Letter to the Editor in Philadelphia
Don't Budge on Sludge
I am a forensic engineer and have been in the sludge business for more than 16 years. Philadelphia should not consider a dryer for sludge [News, "The Sludge Factor," Jenna Portnoy, March 30, 2006]. The reasons: All dryers have exploded or caught fire; the end-product pellet is not stable and upon rewetting, is extremely odorous; natural gas costs are not coming down; and carbon dioxide releases into the air account for 36,000 tons/year of carbon dioxide contribution to greenhouse gases while lime stabilization is 4,200 tons/year. Anyone putting in a dryer is not considering the value to the citizens.
Sam Shepherd
Houston, Texas
http://citypaper.net/current/feedback.shtml
Letter to the Editor in Philadelphia
Don't Budge on Sludge
I am a forensic engineer and have been in the sludge business for more than 16 years. Philadelphia should not consider a dryer for sludge [News, "The Sludge Factor," Jenna Portnoy, March 30, 2006]. The reasons: All dryers have exploded or caught fire; the end-product pellet is not stable and upon rewetting, is extremely odorous; natural gas costs are not coming down; and carbon dioxide releases into the air account for 36,000 tons/year of carbon dioxide contribution to greenhouse gases while lime stabilization is 4,200 tons/year. Anyone putting in a dryer is not considering the value to the citizens.
Sam Shepherd
Houston, Texas
posted by Sludge at 9:18 PM
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