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Role of thermochemical conversion in live stock waste-to-energy treatments: obstacles and opportunities

Permanent URL:
http://handle.nal.usda.gov/10113/19185
Abstract:
Integrating thermochemical conversion (TCC) technologies with current animal waste treatment practices can treat and reduce quantities of manure from consolidated animal feeding operations. Additionally, TCC technologies can produce value-added, renewable energy products. These products can meet heating and power needs or be catalytically converted into liquid fuels. The primary objectives of this study were to assess opportunities and obstacles in the treatment and energy conversion using currently available TCC processes. Both dry and wet livestock manures were assessed. Dry wastes like poultry litter and feedlot manures can be processed directly via pyrolysis and air/steam gasification technology. The solids in the aqueous waste streams from dairy and swine operations can undergo wet gasification or direct liquefaction processes. Alternatively, these solids can be separated and dried before conversion. Due to high ash and sulfur contents, pretreatment of manure is necessary to prevent catalyst poisoning and promote effective unit operation. While the energy input requirements for a conceptual wet gasification manure treatment system of a model swine farm is larger than a traditional anaerobic digestion operation, there are many significant advantages in implementing TCC technology including the following: compact design; faster treatment times; reduction of odors, BOD, and pharmaceutically activated compounds; and elimination of sludge.
Author(s):
Cantrell, Keri , Ro, Kyoung , Mahajan, Devinder , Anjom, Mouzhgun , Hunt, Patrick G.
Subject(s):
animal manure management , waste treatment , chemical treatment , animal feeding operations , energy conversion , animal manures , wastewater treatment , poultry manure , pyrolysis , steaming , gasification , dairy manure , solids , pig manure , ash content , sulfur , pretreatment , catalysts , equipment design , odor control technology , biochemical oxygen demand
Format:
p. 8918-8927.
Note:
Includes references
Source:
Industrial & engineering chemistry research 2007 Dec. 19, v. 46, no. 26
Language:
English
Year:
2007
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
File:
Download [PDF File]
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.