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Enhanced methane production from rice straw co-digested with anaerobic sludge from pulp and paper mill treatment process.
- Source :
-
Bioresource technology [Bioresour Technol] 2013 Nov; Vol. 148, pp. 135-43. Date of Electronic Publication: 2013 Aug 27. - Publication Year :
- 2013
-
Abstract
- Rice straw is a widely available lignocellulosic waste with potential for energy recovery through anaerobic digestion. Lignin slows the hydrolysis phase, resulting in low methane recovery and long digestion periods. Although pretreatment is effective, it often requires high energy inputs or chemicals that are not feasible for farm-scale systems. This study investigates a unique co-digestion strategy to improve methane yields and reduce digestion times for farm-scale systems. By adding both piggery wastewater and paper mill sludge, specific methane yields in laboratory-scale digesters reached the theoretical value for rice straw (i.e. 330LNCH4/kgVS) over the 92-day period. Accelerated hydrolysis of the straw was directly related to the quantity of sludge added. The most stable digester, with sufficient buffering capacity and nutrients, contained equal parts of straw, wastewater and sludge. This approach is feasible for farm-scale applications since it requires no additional energy inputs or changes to existing infrastructure for dry systems.<br /> (Copyright © 2013 Elsevier Ltd. All rights reserved.)
- Subjects :
- Alkalies analysis
Ammonia analysis
Anaerobiosis
Biodegradation, Environmental
Bioreactors microbiology
Fatty Acids, Volatile biosynthesis
Hydrogen-Ion Concentration
Nitrogen analysis
Time Factors
Trace Elements analysis
Biotechnology methods
Industrial Waste
Methane biosynthesis
Oryza chemistry
Paper
Sewage chemistry
Wastewater chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2976
- Volume :
- 148
- Database :
- MEDLINE
- Journal :
- Bioresource technology
- Publication Type :
- Academic Journal
- Accession number :
- 24045200
- Full Text :
- https://doi.org/10.1016/j.biortech.2013.08.107