New waste-to-energy plant will create renewable fuel
http://enr.construction.com/news/powerIndus/archiv [2008-7-25]
Tag : rotary drum
Project officials say the process differs from conventional methodsof drying biosolids by using less heat to remove water from sludgeand using methane gas created during anaerobic digestion to powerthe dryers within the plant, reducing the need for natural gas orother sources of energy.
The plant is being privately funded through a mix of tax-exempt andtaxable debt, issued through the state of California. Onceoperational, revenue will come from guaranteed tipping fees underlong-term contracts with the municipalities to manage a percentageof their biosolids, as well as “fuel offtake” paymentsfrom the cement kilns.
Process
Trucks will dump biosolids into two receiving pits from which thematerial will be pumped into two above-ground silos for storageuntil it is ready for processing in one of two streams. Each streamincludes two 1,040-cu-ft heaters, a 24-ft x 56-in. reactor and acentrifuge.
Project officials say the process differs from conventional methodsof drying biosolids by using less heat to remove water from sludgeand using methane gas created during anaerobic digestion to powerthe dryers within the plant, reducing the need for natural gas orother sources of energy.
The plant is being privately funded through a mix of tax-exempt andtaxable debt, issued through the state of California. Onceoperational, revenue will come from guaranteed tipping fees underlong-term contracts with the municipalities to manage a percentageof their biosolids, as well as “fuel offtake” paymentsfrom the cement kilns.
Process
Trucks will dump biosolids into two receiving pits from which thematerial will be pumped into two above-ground silos for storageuntil it is ready for processing in one of two streams. Each streamincludes two 1,040-cu-ft heaters, a 24-ft x 56-in. reactor and acentrifuge.
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